The following issues were found

modules/core/misc/java/src/java/core+CvType.java
9 issues
All methods are static. Consider using a utility class instead. Alternatively, you could add a private constructor or make the class abstract to silence this warning.
Design

Line: 3 

              package org.opencv.core;

public final class CvType {

    // type depth constants
    public static final int
            CV_8U = 0,
            CV_8S = 1,
            CV_16U = 2,

Reported by PMD.

The class 'CvType' has a Standard Cyclomatic Complexity of 2 (Highest = 10).
Design

Line: 3 

              package org.opencv.core;

public final class CvType {

    // type depth constants
    public static final int
            CV_8U = 0,
            CV_8S = 1,
            CV_16U = 2,

Reported by PMD.

This class has too many methods, consider refactoring it.
Design

Line: 3 

              package org.opencv.core;

public final class CvType {

    // type depth constants
    public static final int
            CV_8U = 0,
            CV_8S = 1,
            CV_16U = 2,

Reported by PMD.

The method 'ELEM_SIZE(int)' has a cyclomatic complexity of 10.
Design

Line: 91 

                      return depth(type) < CV_32F;
    }

    public static final int ELEM_SIZE(int type) {
        switch (depth(type)) {
        case CV_8U:
        case CV_8S:
            return channels(type);
        case CV_16U:

Reported by PMD.

The method 'typeToString' has a Standard Cyclomatic Complexity of 10.
Design

Line: 111 

                      }
    }

    public static final String typeToString(int type) {
        String s;
        switch (depth(type)) {
        case CV_8U:
            s = "CV_8U";
            break;

Reported by PMD.

The method 'typeToString(int)' has a cyclomatic complexity of 11.
Design

Line: 111 

                      }
    }

    public static final String typeToString(int type) {
        String s;
        switch (depth(type)) {
        case CV_8U:
            s = "CV_8U";
            break;

Reported by PMD.

Avoid using Literals in Conditional Statements
Error

Line: 144 

                      }

        int ch = channels(type);
        if (ch <= 4)
            return s + "C" + ch;
        else
            return s + "C(" + ch + ")";
    }

Reported by PMD.

Use one line for each declaration, it enhances code readability.
Design

Line: 23 

                  public static final int CV_USRTYPE1 = CV_16F;

    // predefined type constants
    public static final int
            CV_8UC1 = CV_8UC(1), CV_8UC2 = CV_8UC(2), CV_8UC3 = CV_8UC(3), CV_8UC4 = CV_8UC(4),
            CV_8SC1 = CV_8SC(1), CV_8SC2 = CV_8SC(2), CV_8SC3 = CV_8SC(3), CV_8SC4 = CV_8SC(4),
            CV_16UC1 = CV_16UC(1), CV_16UC2 = CV_16UC(2), CV_16UC3 = CV_16UC(3), CV_16UC4 = CV_16UC(4),
            CV_16SC1 = CV_16SC(1), CV_16SC2 = CV_16SC(2), CV_16SC3 = CV_16SC(3), CV_16SC4 = CV_16SC(4),
            CV_32SC1 = CV_32SC(1), CV_32SC2 = CV_32SC(2), CV_32SC3 = CV_32SC(3), CV_32SC4 = CV_32SC(4),

Reported by PMD.

Use one line for each declaration, it enhances code readability.
Design

Line: 33 

                          CV_64FC1 = CV_64FC(1), CV_64FC2 = CV_64FC(2), CV_64FC3 = CV_64FC(3), CV_64FC4 = CV_64FC(4),
            CV_16FC1 = CV_16FC(1), CV_16FC2 = CV_16FC(2), CV_16FC3 = CV_16FC(3), CV_16FC4 = CV_16FC(4);

    private static final int CV_CN_MAX = 512, CV_CN_SHIFT = 3, CV_DEPTH_MAX = (1 << CV_CN_SHIFT);

    public static final int makeType(int depth, int channels) {
        if (channels <= 0 || channels >= CV_CN_MAX) {
            throw new UnsupportedOperationException(
                    "Channels count should be 1.." + (CV_CN_MAX - 1));

Reported by PMD.

modules/features2d/misc/java/test/SIFTFeatureDetectorTest.java
9 issues
JUnit 4 tests that execute tests should use the @Test annotation, JUnit 5 tests should use @Test, @RepeatedTest, @TestFactory, @TestTemplate or @ParameterizedTest
Design

Line: 7 

              
public class SIFTFeatureDetectorTest extends OpenCVTestCase {

    public void testCreate() {
        fail("Not yet implemented");
    }

    public void testDetectListOfMatListOfListOfKeyPoint() {
        fail("Not yet implemented");

Reported by PMD.

The String literal 'Not yet implemented' appears 8 times in this file; the first occurrence is on line 8
Error

Line: 8 

              public class SIFTFeatureDetectorTest extends OpenCVTestCase {

    public void testCreate() {
        fail("Not yet implemented");
    }

    public void testDetectListOfMatListOfListOfKeyPoint() {
        fail("Not yet implemented");
    }

Reported by PMD.

JUnit 4 tests that execute tests should use the @Test annotation, JUnit 5 tests should use @Test, @RepeatedTest, @TestFactory, @TestTemplate or @ParameterizedTest
Design

Line: 11 

                      fail("Not yet implemented");
    }

    public void testDetectListOfMatListOfListOfKeyPoint() {
        fail("Not yet implemented");
    }

    public void testDetectListOfMatListOfListOfKeyPointListOfMat() {
        fail("Not yet implemented");

Reported by PMD.

JUnit 4 tests that execute tests should use the @Test annotation, JUnit 5 tests should use @Test, @RepeatedTest, @TestFactory, @TestTemplate or @ParameterizedTest
Design

Line: 15 

                      fail("Not yet implemented");
    }

    public void testDetectListOfMatListOfListOfKeyPointListOfMat() {
        fail("Not yet implemented");
    }

    public void testDetectMatListOfKeyPoint() {
        fail("Not yet implemented");

Reported by PMD.

JUnit 4 tests that execute tests should use the @Test annotation, JUnit 5 tests should use @Test, @RepeatedTest, @TestFactory, @TestTemplate or @ParameterizedTest
Design

Line: 19 

                      fail("Not yet implemented");
    }

    public void testDetectMatListOfKeyPoint() {
        fail("Not yet implemented");
    }

    public void testDetectMatListOfKeyPointMat() {
        fail("Not yet implemented");

Reported by PMD.

JUnit 4 tests that execute tests should use the @Test annotation, JUnit 5 tests should use @Test, @RepeatedTest, @TestFactory, @TestTemplate or @ParameterizedTest
Design

Line: 23 

                      fail("Not yet implemented");
    }

    public void testDetectMatListOfKeyPointMat() {
        fail("Not yet implemented");
    }

    public void testEmpty() {
        fail("Not yet implemented");

Reported by PMD.

JUnit 4 tests that execute tests should use the @Test annotation, JUnit 5 tests should use @Test, @RepeatedTest, @TestFactory, @TestTemplate or @ParameterizedTest
Design

Line: 27 

                      fail("Not yet implemented");
    }

    public void testEmpty() {
        fail("Not yet implemented");
    }

    public void testRead() {
        fail("Not yet implemented");

Reported by PMD.

JUnit 4 tests that execute tests should use the @Test annotation, JUnit 5 tests should use @Test, @RepeatedTest, @TestFactory, @TestTemplate or @ParameterizedTest
Design

Line: 31 

                      fail("Not yet implemented");
    }

    public void testRead() {
        fail("Not yet implemented");
    }

    public void testWrite() {
        fail("Not yet implemented");

Reported by PMD.

JUnit 4 tests that execute tests should use the @Test annotation, JUnit 5 tests should use @Test, @RepeatedTest, @TestFactory, @TestTemplate or @ParameterizedTest
Design

Line: 35 

                      fail("Not yet implemented");
    }

    public void testWrite() {
        fail("Not yet implemented");
    }

}

Reported by PMD.

modules/features2d/misc/java/test/ORBFeatureDetectorTest.java
9 issues
JUnit 4 tests that execute tests should use the @Test annotation, JUnit 5 tests should use @Test, @RepeatedTest, @TestFactory, @TestTemplate or @ParameterizedTest
Design

Line: 7 

              
public class ORBFeatureDetectorTest extends OpenCVTestCase {

    public void testCreate() {
        fail("Not yet implemented");
    }

    public void testDetectListOfMatListOfListOfKeyPoint() {
        fail("Not yet implemented");

Reported by PMD.

The String literal 'Not yet implemented' appears 8 times in this file; the first occurrence is on line 8
Error

Line: 8 

              public class ORBFeatureDetectorTest extends OpenCVTestCase {

    public void testCreate() {
        fail("Not yet implemented");
    }

    public void testDetectListOfMatListOfListOfKeyPoint() {
        fail("Not yet implemented");
    }

Reported by PMD.

JUnit 4 tests that execute tests should use the @Test annotation, JUnit 5 tests should use @Test, @RepeatedTest, @TestFactory, @TestTemplate or @ParameterizedTest
Design

Line: 11 

                      fail("Not yet implemented");
    }

    public void testDetectListOfMatListOfListOfKeyPoint() {
        fail("Not yet implemented");
    }

    public void testDetectListOfMatListOfListOfKeyPointListOfMat() {
        fail("Not yet implemented");

Reported by PMD.

JUnit 4 tests that execute tests should use the @Test annotation, JUnit 5 tests should use @Test, @RepeatedTest, @TestFactory, @TestTemplate or @ParameterizedTest
Design

Line: 15 

                      fail("Not yet implemented");
    }

    public void testDetectListOfMatListOfListOfKeyPointListOfMat() {
        fail("Not yet implemented");
    }

    public void testDetectMatListOfKeyPoint() {
        fail("Not yet implemented");

Reported by PMD.

JUnit 4 tests that execute tests should use the @Test annotation, JUnit 5 tests should use @Test, @RepeatedTest, @TestFactory, @TestTemplate or @ParameterizedTest
Design

Line: 19 

                      fail("Not yet implemented");
    }

    public void testDetectMatListOfKeyPoint() {
        fail("Not yet implemented");
    }

    public void testDetectMatListOfKeyPointMat() {
        fail("Not yet implemented");

Reported by PMD.

JUnit 4 tests that execute tests should use the @Test annotation, JUnit 5 tests should use @Test, @RepeatedTest, @TestFactory, @TestTemplate or @ParameterizedTest
Design

Line: 23 

                      fail("Not yet implemented");
    }

    public void testDetectMatListOfKeyPointMat() {
        fail("Not yet implemented");
    }

    public void testEmpty() {
        fail("Not yet implemented");

Reported by PMD.

JUnit 4 tests that execute tests should use the @Test annotation, JUnit 5 tests should use @Test, @RepeatedTest, @TestFactory, @TestTemplate or @ParameterizedTest
Design

Line: 27 

                      fail("Not yet implemented");
    }

    public void testEmpty() {
        fail("Not yet implemented");
    }

    public void testRead() {
        fail("Not yet implemented");

Reported by PMD.

JUnit 4 tests that execute tests should use the @Test annotation, JUnit 5 tests should use @Test, @RepeatedTest, @TestFactory, @TestTemplate or @ParameterizedTest
Design

Line: 31 

                      fail("Not yet implemented");
    }

    public void testRead() {
        fail("Not yet implemented");
    }

    public void testWrite() {
        fail("Not yet implemented");

Reported by PMD.

JUnit 4 tests that execute tests should use the @Test annotation, JUnit 5 tests should use @Test, @RepeatedTest, @TestFactory, @TestTemplate or @ParameterizedTest
Design

Line: 35 

                      fail("Not yet implemented");
    }

    public void testWrite() {
        fail("Not yet implemented");
    }

}

Reported by PMD.

modules/features2d/misc/java/test/MSERFeatureDetectorTest.java
9 issues
JUnit 4 tests that execute tests should use the @Test annotation, JUnit 5 tests should use @Test, @RepeatedTest, @TestFactory, @TestTemplate or @ParameterizedTest
Design

Line: 7 

              
public class MSERFeatureDetectorTest extends OpenCVTestCase {

    public void testCreate() {
        fail("Not yet implemented");
    }

    public void testDetectListOfMatListOfListOfKeyPoint() {
        fail("Not yet implemented");

Reported by PMD.

The String literal 'Not yet implemented' appears 8 times in this file; the first occurrence is on line 8
Error

Line: 8 

              public class MSERFeatureDetectorTest extends OpenCVTestCase {

    public void testCreate() {
        fail("Not yet implemented");
    }

    public void testDetectListOfMatListOfListOfKeyPoint() {
        fail("Not yet implemented");
    }

Reported by PMD.

JUnit 4 tests that execute tests should use the @Test annotation, JUnit 5 tests should use @Test, @RepeatedTest, @TestFactory, @TestTemplate or @ParameterizedTest
Design

Line: 11 

                      fail("Not yet implemented");
    }

    public void testDetectListOfMatListOfListOfKeyPoint() {
        fail("Not yet implemented");
    }

    public void testDetectListOfMatListOfListOfKeyPointListOfMat() {
        fail("Not yet implemented");

Reported by PMD.

JUnit 4 tests that execute tests should use the @Test annotation, JUnit 5 tests should use @Test, @RepeatedTest, @TestFactory, @TestTemplate or @ParameterizedTest
Design

Line: 15 

                      fail("Not yet implemented");
    }

    public void testDetectListOfMatListOfListOfKeyPointListOfMat() {
        fail("Not yet implemented");
    }

    public void testDetectMatListOfKeyPoint() {
        fail("Not yet implemented");

Reported by PMD.

JUnit 4 tests that execute tests should use the @Test annotation, JUnit 5 tests should use @Test, @RepeatedTest, @TestFactory, @TestTemplate or @ParameterizedTest
Design

Line: 19 

                      fail("Not yet implemented");
    }

    public void testDetectMatListOfKeyPoint() {
        fail("Not yet implemented");
    }

    public void testDetectMatListOfKeyPointMat() {
        fail("Not yet implemented");

Reported by PMD.

JUnit 4 tests that execute tests should use the @Test annotation, JUnit 5 tests should use @Test, @RepeatedTest, @TestFactory, @TestTemplate or @ParameterizedTest
Design

Line: 23 

                      fail("Not yet implemented");
    }

    public void testDetectMatListOfKeyPointMat() {
        fail("Not yet implemented");
    }

    public void testEmpty() {
        fail("Not yet implemented");

Reported by PMD.

JUnit 4 tests that execute tests should use the @Test annotation, JUnit 5 tests should use @Test, @RepeatedTest, @TestFactory, @TestTemplate or @ParameterizedTest
Design

Line: 27 

                      fail("Not yet implemented");
    }

    public void testEmpty() {
        fail("Not yet implemented");
    }

    public void testRead() {
        fail("Not yet implemented");

Reported by PMD.

JUnit 4 tests that execute tests should use the @Test annotation, JUnit 5 tests should use @Test, @RepeatedTest, @TestFactory, @TestTemplate or @ParameterizedTest
Design

Line: 31 

                      fail("Not yet implemented");
    }

    public void testRead() {
        fail("Not yet implemented");
    }

    public void testWrite() {
        fail("Not yet implemented");

Reported by PMD.

JUnit 4 tests that execute tests should use the @Test annotation, JUnit 5 tests should use @Test, @RepeatedTest, @TestFactory, @TestTemplate or @ParameterizedTest
Design

Line: 35 

                      fail("Not yet implemented");
    }

    public void testWrite() {
        fail("Not yet implemented");
    }

}

Reported by PMD.

modules/features2d/misc/java/test/HARRISFeatureDetectorTest.java
9 issues
JUnit 4 tests that execute tests should use the @Test annotation, JUnit 5 tests should use @Test, @RepeatedTest, @TestFactory, @TestTemplate or @ParameterizedTest
Design

Line: 7 

              
public class HARRISFeatureDetectorTest extends OpenCVTestCase {

    public void testCreate() {
        fail("Not yet implemented");
    }

    public void testDetectListOfMatListOfListOfKeyPoint() {
        fail("Not yet implemented");

Reported by PMD.

The String literal 'Not yet implemented' appears 8 times in this file; the first occurrence is on line 8
Error

Line: 8 

              public class HARRISFeatureDetectorTest extends OpenCVTestCase {

    public void testCreate() {
        fail("Not yet implemented");
    }

    public void testDetectListOfMatListOfListOfKeyPoint() {
        fail("Not yet implemented");
    }

Reported by PMD.

JUnit 4 tests that execute tests should use the @Test annotation, JUnit 5 tests should use @Test, @RepeatedTest, @TestFactory, @TestTemplate or @ParameterizedTest
Design

Line: 11 

                      fail("Not yet implemented");
    }

    public void testDetectListOfMatListOfListOfKeyPoint() {
        fail("Not yet implemented");
    }

    public void testDetectListOfMatListOfListOfKeyPointListOfMat() {
        fail("Not yet implemented");

Reported by PMD.

JUnit 4 tests that execute tests should use the @Test annotation, JUnit 5 tests should use @Test, @RepeatedTest, @TestFactory, @TestTemplate or @ParameterizedTest
Design

Line: 15 

                      fail("Not yet implemented");
    }

    public void testDetectListOfMatListOfListOfKeyPointListOfMat() {
        fail("Not yet implemented");
    }

    public void testDetectMatListOfKeyPoint() {
        fail("Not yet implemented");

Reported by PMD.

JUnit 4 tests that execute tests should use the @Test annotation, JUnit 5 tests should use @Test, @RepeatedTest, @TestFactory, @TestTemplate or @ParameterizedTest
Design

Line: 19 

                      fail("Not yet implemented");
    }

    public void testDetectMatListOfKeyPoint() {
        fail("Not yet implemented");
    }

    public void testDetectMatListOfKeyPointMat() {
        fail("Not yet implemented");

Reported by PMD.

JUnit 4 tests that execute tests should use the @Test annotation, JUnit 5 tests should use @Test, @RepeatedTest, @TestFactory, @TestTemplate or @ParameterizedTest
Design

Line: 23 

                      fail("Not yet implemented");
    }

    public void testDetectMatListOfKeyPointMat() {
        fail("Not yet implemented");
    }

    public void testEmpty() {
        fail("Not yet implemented");

Reported by PMD.

JUnit 4 tests that execute tests should use the @Test annotation, JUnit 5 tests should use @Test, @RepeatedTest, @TestFactory, @TestTemplate or @ParameterizedTest
Design

Line: 27 

                      fail("Not yet implemented");
    }

    public void testEmpty() {
        fail("Not yet implemented");
    }

    public void testRead() {
        fail("Not yet implemented");

Reported by PMD.

JUnit 4 tests that execute tests should use the @Test annotation, JUnit 5 tests should use @Test, @RepeatedTest, @TestFactory, @TestTemplate or @ParameterizedTest
Design

Line: 31 

                      fail("Not yet implemented");
    }

    public void testRead() {
        fail("Not yet implemented");
    }

    public void testWrite() {
        fail("Not yet implemented");

Reported by PMD.

JUnit 4 tests that execute tests should use the @Test annotation, JUnit 5 tests should use @Test, @RepeatedTest, @TestFactory, @TestTemplate or @ParameterizedTest
Design

Line: 35 

                      fail("Not yet implemented");
    }

    public void testWrite() {
        fail("Not yet implemented");
    }

}

Reported by PMD.

modules/features2d/misc/java/test/GFTTFeatureDetectorTest.java
9 issues
JUnit 4 tests that execute tests should use the @Test annotation, JUnit 5 tests should use @Test, @RepeatedTest, @TestFactory, @TestTemplate or @ParameterizedTest
Design

Line: 7 

              
public class GFTTFeatureDetectorTest extends OpenCVTestCase {

    public void testCreate() {
        fail("Not yet implemented");
    }

    public void testDetectListOfMatListOfListOfKeyPoint() {
        fail("Not yet implemented");

Reported by PMD.

The String literal 'Not yet implemented' appears 8 times in this file; the first occurrence is on line 8
Error

Line: 8 

              public class GFTTFeatureDetectorTest extends OpenCVTestCase {

    public void testCreate() {
        fail("Not yet implemented");
    }

    public void testDetectListOfMatListOfListOfKeyPoint() {
        fail("Not yet implemented");
    }

Reported by PMD.

JUnit 4 tests that execute tests should use the @Test annotation, JUnit 5 tests should use @Test, @RepeatedTest, @TestFactory, @TestTemplate or @ParameterizedTest
Design

Line: 11 

                      fail("Not yet implemented");
    }

    public void testDetectListOfMatListOfListOfKeyPoint() {
        fail("Not yet implemented");
    }

    public void testDetectListOfMatListOfListOfKeyPointListOfMat() {
        fail("Not yet implemented");

Reported by PMD.

JUnit 4 tests that execute tests should use the @Test annotation, JUnit 5 tests should use @Test, @RepeatedTest, @TestFactory, @TestTemplate or @ParameterizedTest
Design

Line: 15 

                      fail("Not yet implemented");
    }

    public void testDetectListOfMatListOfListOfKeyPointListOfMat() {
        fail("Not yet implemented");
    }

    public void testDetectMatListOfKeyPoint() {
        fail("Not yet implemented");

Reported by PMD.

JUnit 4 tests that execute tests should use the @Test annotation, JUnit 5 tests should use @Test, @RepeatedTest, @TestFactory, @TestTemplate or @ParameterizedTest
Design

Line: 19 

                      fail("Not yet implemented");
    }

    public void testDetectMatListOfKeyPoint() {
        fail("Not yet implemented");
    }

    public void testDetectMatListOfKeyPointMat() {
        fail("Not yet implemented");

Reported by PMD.

JUnit 4 tests that execute tests should use the @Test annotation, JUnit 5 tests should use @Test, @RepeatedTest, @TestFactory, @TestTemplate or @ParameterizedTest
Design

Line: 23 

                      fail("Not yet implemented");
    }

    public void testDetectMatListOfKeyPointMat() {
        fail("Not yet implemented");
    }

    public void testEmpty() {
        fail("Not yet implemented");

Reported by PMD.

JUnit 4 tests that execute tests should use the @Test annotation, JUnit 5 tests should use @Test, @RepeatedTest, @TestFactory, @TestTemplate or @ParameterizedTest
Design

Line: 27 

                      fail("Not yet implemented");
    }

    public void testEmpty() {
        fail("Not yet implemented");
    }

    public void testRead() {
        fail("Not yet implemented");

Reported by PMD.

JUnit 4 tests that execute tests should use the @Test annotation, JUnit 5 tests should use @Test, @RepeatedTest, @TestFactory, @TestTemplate or @ParameterizedTest
Design

Line: 31 

                      fail("Not yet implemented");
    }

    public void testRead() {
        fail("Not yet implemented");
    }

    public void testWrite() {
        fail("Not yet implemented");

Reported by PMD.

JUnit 4 tests that execute tests should use the @Test annotation, JUnit 5 tests should use @Test, @RepeatedTest, @TestFactory, @TestTemplate or @ParameterizedTest
Design

Line: 35 

                      fail("Not yet implemented");
    }

    public void testWrite() {
        fail("Not yet implemented");
    }

}

Reported by PMD.

modules/features2d/misc/java/test/DENSEFeatureDetectorTest.java
9 issues
JUnit 4 tests that execute tests should use the @Test annotation, JUnit 5 tests should use @Test, @RepeatedTest, @TestFactory, @TestTemplate or @ParameterizedTest
Design

Line: 7 

              
public class DENSEFeatureDetectorTest extends OpenCVTestCase {

    public void testCreate() {
        fail("Not yet implemented");
    }

    public void testDetectListOfMatListOfListOfKeyPoint() {
        fail("Not yet implemented");

Reported by PMD.

The String literal 'Not yet implemented' appears 8 times in this file; the first occurrence is on line 8
Error

Line: 8 

              public class DENSEFeatureDetectorTest extends OpenCVTestCase {

    public void testCreate() {
        fail("Not yet implemented");
    }

    public void testDetectListOfMatListOfListOfKeyPoint() {
        fail("Not yet implemented");
    }

Reported by PMD.

JUnit 4 tests that execute tests should use the @Test annotation, JUnit 5 tests should use @Test, @RepeatedTest, @TestFactory, @TestTemplate or @ParameterizedTest
Design

Line: 11 

                      fail("Not yet implemented");
    }

    public void testDetectListOfMatListOfListOfKeyPoint() {
        fail("Not yet implemented");
    }

    public void testDetectListOfMatListOfListOfKeyPointListOfMat() {
        fail("Not yet implemented");

Reported by PMD.

JUnit 4 tests that execute tests should use the @Test annotation, JUnit 5 tests should use @Test, @RepeatedTest, @TestFactory, @TestTemplate or @ParameterizedTest
Design

Line: 15 

                      fail("Not yet implemented");
    }

    public void testDetectListOfMatListOfListOfKeyPointListOfMat() {
        fail("Not yet implemented");
    }

    public void testDetectMatListOfKeyPoint() {
        fail("Not yet implemented");

Reported by PMD.

JUnit 4 tests that execute tests should use the @Test annotation, JUnit 5 tests should use @Test, @RepeatedTest, @TestFactory, @TestTemplate or @ParameterizedTest
Design

Line: 19 

                      fail("Not yet implemented");
    }

    public void testDetectMatListOfKeyPoint() {
        fail("Not yet implemented");
    }

    public void testDetectMatListOfKeyPointMat() {
        fail("Not yet implemented");

Reported by PMD.

JUnit 4 tests that execute tests should use the @Test annotation, JUnit 5 tests should use @Test, @RepeatedTest, @TestFactory, @TestTemplate or @ParameterizedTest
Design

Line: 23 

                      fail("Not yet implemented");
    }

    public void testDetectMatListOfKeyPointMat() {
        fail("Not yet implemented");
    }

    public void testEmpty() {
        fail("Not yet implemented");

Reported by PMD.

JUnit 4 tests that execute tests should use the @Test annotation, JUnit 5 tests should use @Test, @RepeatedTest, @TestFactory, @TestTemplate or @ParameterizedTest
Design

Line: 27 

                      fail("Not yet implemented");
    }

    public void testEmpty() {
        fail("Not yet implemented");
    }

    public void testRead() {
        fail("Not yet implemented");

Reported by PMD.

JUnit 4 tests that execute tests should use the @Test annotation, JUnit 5 tests should use @Test, @RepeatedTest, @TestFactory, @TestTemplate or @ParameterizedTest
Design

Line: 31 

                      fail("Not yet implemented");
    }

    public void testRead() {
        fail("Not yet implemented");
    }

    public void testWrite() {
        fail("Not yet implemented");

Reported by PMD.

JUnit 4 tests that execute tests should use the @Test annotation, JUnit 5 tests should use @Test, @RepeatedTest, @TestFactory, @TestTemplate or @ParameterizedTest
Design

Line: 35 

                      fail("Not yet implemented");
    }

    public void testWrite() {
        fail("Not yet implemented");
    }

}

Reported by PMD.

samples/android/tutorial-3-cameracontrol/src/org/opencv/samples/tutorial3/Tutorial3View.java
9 issues
Avoid instantiating FileInputStream, FileOutputStream, FileReader, or FileWriter
Performance

Line: 77 

              
        // Write the image in a file (in jpeg format)
        try {
            FileOutputStream fos = new FileOutputStream(mPictureFileName);

            fos.write(data);
            fos.close();

        } catch (java.io.IOException e) {

Reported by PMD.

Found non-transient, non-static member. Please mark as transient or provide accessors.
Error

Line: 18 

              public class Tutorial3View extends JavaCameraView implements PictureCallback {

    private static final String TAG = "Sample::Tutorial3View";
    private String mPictureFileName;

    public Tutorial3View(Context context, AttributeSet attrs) {
        super(context, attrs);
    }

Reported by PMD.

Potential violation of Law of Demeter (method chain calls)
Design

Line: 25 

                  }

    public List<String> getEffectList() {
        return mCamera.getParameters().getSupportedColorEffects();
    }

    public boolean isEffectSupported() {
        return (mCamera.getParameters().getColorEffect() != null);
    }

Reported by PMD.

Potential violation of Law of Demeter (method chain calls)
Design

Line: 29 

                  }

    public boolean isEffectSupported() {
        return (mCamera.getParameters().getColorEffect() != null);
    }

    public String getEffect() {
        return mCamera.getParameters().getColorEffect();
    }

Reported by PMD.

Potential violation of Law of Demeter (method chain calls)
Design

Line: 33 

                  }

    public String getEffect() {
        return mCamera.getParameters().getColorEffect();
    }

    public void setEffect(String effect) {
        Camera.Parameters params = mCamera.getParameters();
        params.setColorEffect(effect);

Reported by PMD.

Potential violation of Law of Demeter (object not created locally)
Design

Line: 38 

              
    public void setEffect(String effect) {
        Camera.Parameters params = mCamera.getParameters();
        params.setColorEffect(effect);
        mCamera.setParameters(params);
    }

    public List<Size> getResolutionList() {
        return mCamera.getParameters().getSupportedPreviewSizes();

Reported by PMD.

Potential violation of Law of Demeter (method chain calls)
Design

Line: 43 

                  }

    public List<Size> getResolutionList() {
        return mCamera.getParameters().getSupportedPreviewSizes();
    }

    public void setResolution(Size resolution) {
        disconnectCamera();
        mMaxHeight = resolution.height;

Reported by PMD.

Potential violation of Law of Demeter (method chain calls)
Design

Line: 54 

                  }

    public Size getResolution() {
        return mCamera.getParameters().getPreviewSize();
    }

    public void takePicture(final String fileName) {
        Log.i(TAG, "Taking picture");
        this.mPictureFileName = fileName;

Reported by PMD.

Ensure that resources like this FileOutputStream object are closed after use
Error

Line: 77 

              
        // Write the image in a file (in jpeg format)
        try {
            FileOutputStream fos = new FileOutputStream(mPictureFileName);

            fos.write(data);
            fos.close();

        } catch (java.io.IOException e) {

Reported by PMD.

samples/python/tutorial_code/features2D/feature_flann_matcher/SURF_FLANN_matching_Demo.py
9 issues
Unable to import 'cv2'
Error

Line: 2 Column: 1 

              from __future__ import print_function
import cv2 as cv
import numpy as np
import argparse

parser = argparse.ArgumentParser(description='Code for Feature Matching with FLANN tutorial.')
parser.add_argument('--input1', help='Path to input image 1.', default='box.png')
parser.add_argument('--input2', help='Path to input image 2.', default='box_in_scene.png')
args = parser.parse_args()

Reported by Pylint.

Module name "SURF_FLANN_matching_Demo" doesn't conform to snake_case naming style
Error

Line: 1 Column: 1 

              from __future__ import print_function
import cv2 as cv
import numpy as np
import argparse

parser = argparse.ArgumentParser(description='Code for Feature Matching with FLANN tutorial.')
parser.add_argument('--input1', help='Path to input image 1.', default='box.png')
parser.add_argument('--input2', help='Path to input image 2.', default='box_in_scene.png')
args = parser.parse_args()

Reported by Pylint.

Missing module docstring
Error

Line: 1 Column: 1 

              from __future__ import print_function
import cv2 as cv
import numpy as np
import argparse

parser = argparse.ArgumentParser(description='Code for Feature Matching with FLANN tutorial.')
parser.add_argument('--input1', help='Path to input image 1.', default='box.png')
parser.add_argument('--input2', help='Path to input image 2.', default='box_in_scene.png')
args = parser.parse_args()

Reported by Pylint.

standard import "import argparse" should be placed before "import cv2 as cv"
Error

Line: 4 Column: 1 

              from __future__ import print_function
import cv2 as cv
import numpy as np
import argparse

parser = argparse.ArgumentParser(description='Code for Feature Matching with FLANN tutorial.')
parser.add_argument('--input1', help='Path to input image 1.', default='box.png')
parser.add_argument('--input2', help='Path to input image 2.', default='box_in_scene.png')
args = parser.parse_args()

Reported by Pylint.

Consider using sys.exit()
Error

Line: 15 Column: 5 

              img2 = cv.imread(cv.samples.findFile(args.input2), cv.IMREAD_GRAYSCALE)
if img1 is None or img2 is None:
    print('Could not open or find the images!')
    exit(0)

#-- Step 1: Detect the keypoints using SURF Detector, compute the descriptors
minHessian = 400
detector = cv.xfeatures2d_SURF.create(hessianThreshold=minHessian)
keypoints1, descriptors1 = detector.detectAndCompute(img1, None)

Reported by Pylint.

Constant name "minHessian" doesn't conform to UPPER_CASE naming style
Error

Line: 18 Column: 1 

                  exit(0)

#-- Step 1: Detect the keypoints using SURF Detector, compute the descriptors
minHessian = 400
detector = cv.xfeatures2d_SURF.create(hessianThreshold=minHessian)
keypoints1, descriptors1 = detector.detectAndCompute(img1, None)
keypoints2, descriptors2 = detector.detectAndCompute(img2, None)

#-- Step 2: Matching descriptor vectors with a FLANN based matcher

Reported by Pylint.

Constant name "ratio_thresh" doesn't conform to UPPER_CASE naming style
Error

Line: 29 Column: 1 

              knn_matches = matcher.knnMatch(descriptors1, descriptors2, 2)

#-- Filter matches using the Lowe's ratio test
ratio_thresh = 0.7
good_matches = []
for m,n in knn_matches:
    if m.distance < ratio_thresh * n.distance:
        good_matches.append(m)

Reported by Pylint.

Line too long (107/100)
Error

Line: 36 Column: 1 

                      good_matches.append(m)

#-- Draw matches
img_matches = np.empty((max(img1.shape[0], img2.shape[0]), img1.shape[1]+img2.shape[1], 3), dtype=np.uint8)
cv.drawMatches(img1, keypoints1, img2, keypoints2, good_matches, img_matches, flags=cv.DrawMatchesFlags_NOT_DRAW_SINGLE_POINTS)

#-- Show detected matches
cv.imshow('Good Matches', img_matches)

Reported by Pylint.

Line too long (127/100)
Error

Line: 37 Column: 1 

              
#-- Draw matches
img_matches = np.empty((max(img1.shape[0], img2.shape[0]), img1.shape[1]+img2.shape[1], 3), dtype=np.uint8)
cv.drawMatches(img1, keypoints1, img2, keypoints2, good_matches, img_matches, flags=cv.DrawMatchesFlags_NOT_DRAW_SINGLE_POINTS)

#-- Show detected matches
cv.imshow('Good Matches', img_matches)

cv.waitKey()

Reported by Pylint.

samples/python/tutorial_code/Histograms_Matching/histogram_calculation/calcHist_Demo.py
9 issues
Unable to import 'cv2'
Error

Line: 3 Column: 1 

              from __future__ import print_function
from __future__ import division
import cv2 as cv
import numpy as np
import argparse

## [Load image]
parser = argparse.ArgumentParser(description='Code for Histogram Calculation tutorial.')
parser.add_argument('--input', help='Path to input image.', default='lena.jpg')

Reported by Pylint.

Module name "calcHist_Demo" doesn't conform to snake_case naming style
Error

Line: 1 Column: 1 

              from __future__ import print_function
from __future__ import division
import cv2 as cv
import numpy as np
import argparse

## [Load image]
parser = argparse.ArgumentParser(description='Code for Histogram Calculation tutorial.')
parser.add_argument('--input', help='Path to input image.', default='lena.jpg')

Reported by Pylint.

Missing module docstring
Error

Line: 1 Column: 1 

              from __future__ import print_function
from __future__ import division
import cv2 as cv
import numpy as np
import argparse

## [Load image]
parser = argparse.ArgumentParser(description='Code for Histogram Calculation tutorial.')
parser.add_argument('--input', help='Path to input image.', default='lena.jpg')

Reported by Pylint.

standard import "import argparse" should be placed before "import cv2 as cv"
Error

Line: 5 Column: 1 

              from __future__ import division
import cv2 as cv
import numpy as np
import argparse

## [Load image]
parser = argparse.ArgumentParser(description='Code for Histogram Calculation tutorial.')
parser.add_argument('--input', help='Path to input image.', default='lena.jpg')
args = parser.parse_args()

Reported by Pylint.

Consider using sys.exit()
Error

Line: 15 Column: 5 

              src = cv.imread(cv.samples.findFile(args.input))
if src is None:
    print('Could not open or find the image:', args.input)
    exit(0)
## [Load image]

## [Separate the image in 3 places ( B, G and R )]
bgr_planes = cv.split(src)
## [Separate the image in 3 places ( B, G and R )]

Reported by Pylint.

Constant name "histSize" doesn't conform to UPPER_CASE naming style
Error

Line: 23 Column: 1 

              ## [Separate the image in 3 places ( B, G and R )]

## [Establish the number of bins]
histSize = 256
## [Establish the number of bins]

## [Set the ranges ( for B,G,R) )]
histRange = (0, 256) # the upper boundary is exclusive
## [Set the ranges ( for B,G,R) )]

Reported by Pylint.

Constant name "accumulate" doesn't conform to UPPER_CASE naming style
Error

Line: 31 Column: 1 

              ## [Set the ranges ( for B,G,R) )]

## [Set histogram param]
accumulate = False
## [Set histogram param]

## [Compute the histograms]
b_hist = cv.calcHist(bgr_planes, [0], None, [histSize], histRange, accumulate=accumulate)
g_hist = cv.calcHist(bgr_planes, [1], None, [histSize], histRange, accumulate=accumulate)

Reported by Pylint.

Constant name "hist_w" doesn't conform to UPPER_CASE naming style
Error

Line: 41 Column: 1 

              ## [Compute the histograms]

## [Draw the histograms for B, G and R]
hist_w = 512
hist_h = 400
bin_w = int(round( hist_w/histSize ))

histImage = np.zeros((hist_h, hist_w, 3), dtype=np.uint8)
## [Draw the histograms for B, G and R]

Reported by Pylint.

Constant name "hist_h" doesn't conform to UPPER_CASE naming style
Error

Line: 42 Column: 1 

              
## [Draw the histograms for B, G and R]
hist_w = 512
hist_h = 400
bin_w = int(round( hist_w/histSize ))

histImage = np.zeros((hist_h, hist_w, 3), dtype=np.uint8)
## [Draw the histograms for B, G and R]

Reported by Pylint.