/**
* Tests similarity-calculation with a simple pHash-algorithm. This approach is less reliable than
* similarity-calculation via image-signature, it is more likely to give false positives /
* negatives if one of the given images is a cutout from the other
*
* @throws Exception
*/
@Test
public void testSimilaritySimpleHashGreyscale() throws Exception {
if (similar1a != null
&& similar1b != null
&& different != null
&& similar2b != null
&& similar2a != null) {
assertTrue(ImageSimilarity.identifyImageSimilarityBasedOnPHash(similar1b, similar1a) >= .7);
assertTrue(ImageSimilarity.identifyImageSimilarityBasedOnPHash(similar2b, similar2a) >= .7);
assertTrue(ImageSimilarity.identifyImageSimilarityBasedOnPHash(similar1b, different) < .7);
assertTrue(ImageSimilarity.identifyImageSimilarityBasedOnPHash(similar1b, different) < .7);
assertEquals(
ImageSimilarity.identifyImageSimilarityBasedOnPHash(different, different), 1, 0.00001);
}
}
@Test
public void testSimilarityImageHashFromColorDeviation() throws Exception {
assertTrue(
HashSimilarity.getSimilarityFromHash(
ImageSimilarity.getImageHashFromColorDeviation(similar1b),
ImageSimilarity.getImageHashFromColorDeviation(similar1a))
> .75);
assertTrue(
HashSimilarity.getSimilarityFromHash(
ImageSimilarity.getImageHashFromColorDeviation(similar3b),
ImageSimilarity.getImageHashFromColorDeviation(similar3a))
> .75);
assertTrue(
HashSimilarity.getSimilarityFromHash(
ImageSimilarity.getImageHashFromColorDeviation(similar3b),
ImageSimilarity.getImageHashFromColorDeviation(different))
< .75);
assertEquals(
HashSimilarity.getSimilarityFromHash(
ImageSimilarity.getImageHashFromColorDeviation(different),
ImageSimilarity.getImageHashFromColorDeviation(different)),
1,
0.0001);
}
/**
* Tests similarity-calculation based on image-signatures
*
* @throws Exception
*/
@Test
public void testIdentifyImageSimilarity() throws Exception {
if (similar1a != null
&& similar1b != null
&& different != null
&& similar2b != null
&& similar2a != null) {
assertTrue(
ImageSimilarity.identifyImageSimilarityBasedOnSignature(similar1a, similar1b) > .95);
assertTrue(
ImageSimilarity.identifyImageSimilarityBasedOnSignature(similar1a, different) < 90);
assertTrue(
ImageSimilarity.identifyImageSimilarityBasedOnSignature(similar1b, different) < 90);
assertEquals(
ImageSimilarity.identifyImageSimilarityBasedOnSignature(similar1a, similar1a), 1, .00001);
assertEquals(
ImageSimilarity.identifyImageSimilarityBasedOnSignature(similar1b, similar1b), 1, .00001);
assertEquals(
ImageSimilarity.identifyImageSimilarityBasedOnSignature(different, different), 1, .00001);
/*
System.out.println("1a:1b "+ImageSimilarity.identifyImageSimilarityBasedOnSignature(similar1a,similar1b));
System.out.println("3a:3b "+ImageSimilarity.identifyImageSimilarityBasedOnSignature(similar3a,similar3b));
System.out.println("2a:2b "+ImageSimilarity.identifyImageSimilarityBasedOnSignature(similar2a,similar2b)+"\n");
System.out.println("3a:2b "+ImageSimilarity.identifyImageSimilarityBasedOnSignature(similar3a,similar2b));
System.out.println("3b:1a "+ImageSimilarity.identifyImageSimilarityBasedOnSignature(similar3b,similar1a));
System.out.println("1a:2a "+ImageSimilarity.identifyImageSimilarityBasedOnSignature(similar1a,similar2a));
System.out.println("1b:2b "+ImageSimilarity.identifyImageSimilarityBasedOnSignature(similar1b,similar2b)+"\n");
System.out.println("1a:d "+ImageSimilarity.identifyImageSimilarityBasedOnSignature(similar1a,different));
System.out.println("1b:d "+ImageSimilarity.identifyImageSimilarityBasedOnSignature(similar1b,different));
System.out.println("2a:d "+ImageSimilarity.identifyImageSimilarityBasedOnSignature(similar2a,different));
System.out.println("2b:d "+ImageSimilarity.identifyImageSimilarityBasedOnSignature(similar2b,different));
System.out.println("---------------------");
*/
}
}
@Test
public void testSimilarityImageHashFromSignature() throws Exception {
if (similar1a != null
&& similar1b != null
&& different != null
&& similar2b != null
&& similar2a != null) {
assertTrue(
HashSimilarity.getSimilarityFromHash(
ImageSimilarity.getImageHashFromSignature(similar1a),
ImageSimilarity.getImageHashFromSignature(similar1b))
>= .75);
assertTrue(
HashSimilarity.getSimilarityFromHash(
ImageSimilarity.getImageHashFromSignature(similar2a),
ImageSimilarity.getImageHashFromSignature(similar2b))
>= .75);
assertTrue(
HashSimilarity.getSimilarityFromHash(
ImageSimilarity.getImageHashFromSignature(similar3a),
ImageSimilarity.getImageHashFromSignature(similar3b))
>= .75);
assertTrue(
HashSimilarity.getSimilarityFromHash(
ImageSimilarity.getImageHashFromSignature(different),
ImageSimilarity.getImageHashFromSignature(different))
>= .75);
assertTrue(
HashSimilarity.getSimilarityFromHash(
ImageSimilarity.getImageHashFromSignature(similar1a),
ImageSimilarity.getImageHashFromSignature(different))
< .75);
assertTrue(
HashSimilarity.getSimilarityFromHash(
ImageSimilarity.getImageHashFromSignature(similar1a),
ImageSimilarity.getImageHashFromSignature(different))
< .75);
assertTrue(
HashSimilarity.getSimilarityFromHash(
ImageSimilarity.getImageHashFromSignature(similar1a),
ImageSimilarity.getImageHashFromSignature(different))
< .75);
/* System.out.println("1a:1b "+HashSimilarity.getSimilarityFromHash(ImageSimilarity.getImageHashFromColorDeviation(similar1a),ImageSimilarity.getImageHashFromColorDeviation(similar1b)));
System.out.println("3a:3b "+HashSimilarity.getSimilarityFromHash(ImageSimilarity.getImageHashFromColorDeviation(similar3a),ImageSimilarity.getImageHashFromColorDeviation(similar3b)));
System.out.println("2a:2b "+HashSimilarity.getSimilarityFromHash(ImageSimilarity.getImageHashFromColorDeviation(similar2a),ImageSimilarity.getImageHashFromColorDeviation(similar2b))+"\n");
System.out.println("1a:2a "+HashSimilarity.getSimilarityFromHash(ImageSimilarity.getImageHashFromColorDeviation(similar1a),ImageSimilarity.getImageHashFromColorDeviation(similar2a)));
System.out.println("3a:2b "+HashSimilarity.getSimilarityFromHash(ImageSimilarity.getImageHashFromColorDeviation(similar3a),ImageSimilarity.getImageHashFromColorDeviation(similar2b)));
System.out.println("3b:1a "+HashSimilarity.getSimilarityFromHash(ImageSimilarity.getImageHashFromColorDeviation(similar3b),ImageSimilarity.getImageHashFromColorDeviation(similar1a)));
System.out.println("1b:2b "+HashSimilarity.getSimilarityFromHash(ImageSimilarity.getImageHashFromColorDeviation(similar1b),ImageSimilarity.getImageHashFromColorDeviation(similar2b))+"\n");
System.out.println("1a:d "+HashSimilarity.getSimilarityFromHash(ImageSimilarity.getImageHashFromColorDeviation(similar1a),ImageSimilarity.getImageHashFromColorDeviation(different)));
System.out.println("1a:d "+HashSimilarity.getSimilarityFromHash(ImageSimilarity.getImageHashFromColorDeviation(similar1a),ImageSimilarity.getImageHashFromColorDeviation(different)));
System.out.println("2a:d "+HashSimilarity.getSimilarityFromHash(ImageSimilarity.getImageHashFromColorDeviation(similar2a),ImageSimilarity.getImageHashFromColorDeviation(different)));
System.out.println("2b:d "+HashSimilarity.getSimilarityFromHash(ImageSimilarity.getImageHashFromColorDeviation(similar2b),ImageSimilarity.getImageHashFromColorDeviation(different))+"\n\n");
System.out.println("1a:1b "+HashSimilarity.getSimilarityFromHash(ImageSimilarity.getImageHashFromSignature(similar1a),ImageSimilarity.getImageHashFromSignature(similar1b)));
System.out.println("3a:3b "+HashSimilarity.getSimilarityFromHash(ImageSimilarity.getImageHashFromSignature(similar3a),ImageSimilarity.getImageHashFromSignature(similar3b)));
System.out.println("2a:2b "+HashSimilarity.getSimilarityFromHash(ImageSimilarity.getImageHashFromSignature(similar2a),ImageSimilarity.getImageHashFromSignature(similar2b))+"\n");
System.out.println("1a:2a "+HashSimilarity.getSimilarityFromHash(ImageSimilarity.getImageHashFromSignature(similar1a),ImageSimilarity.getImageHashFromSignature(similar2a)));
System.out.println("3a:2b "+HashSimilarity.getSimilarityFromHash(ImageSimilarity.getImageHashFromSignature(similar3a),ImageSimilarity.getImageHashFromSignature(similar2b)));
System.out.println("3b:1a "+HashSimilarity.getSimilarityFromHash(ImageSimilarity.getImageHashFromSignature(similar3b),ImageSimilarity.getImageHashFromSignature(similar1a)));
System.out.println("1b:2b "+HashSimilarity.getSimilarityFromHash(ImageSimilarity.getImageHashFromSignature(similar1b),ImageSimilarity.getImageHashFromSignature(similar2b))+"\n");
System.out.println("1a:d "+HashSimilarity.getSimilarityFromHash(ImageSimilarity.getImageHashFromSignature(similar1a),ImageSimilarity.getImageHashFromSignature(different)));
System.out.println("1a:d "+HashSimilarity.getSimilarityFromHash(ImageSimilarity.getImageHashFromSignature(similar1a),ImageSimilarity.getImageHashFromSignature(different)));
System.out.println("2a:d "+HashSimilarity.getSimilarityFromHash(ImageSimilarity.getImageHashFromSignature(similar2a),ImageSimilarity.getImageHashFromSignature(different)));
System.out.println("2b:d "+HashSimilarity.getSimilarityFromHash(ImageSimilarity.getImageHashFromSignature(similar2b),ImageSimilarity.getImageHashFromSignature(different)));
*/
}
}