Вот код, чтобы сделать это:
// Assume SourceImage is a Bitmap ARGB_8888
BitmapFactory.Options options = new BitmapFactory.Options();
options.inPreferredConfig = Bitmap.Config.ARGB_8888;
Bitmap refImage = BitmapFactory.decodeFile(mBaseDir + "some_reference.jpg", options);
Mat hsvRef = new Mat();
Mat hsvSource = new Mat();
Mat srcRef = new Mat(refImage.getHeight(), refImage.getWidth(), CvType.CV_8U, new Scalar(4));
Utils.bitmapToMat(refImage, srcRef);
Mat srcSource = new Mat(SourceImage.getHeight(), SourceImage.getWidth(), CvType.CV_8U, new Scalar(4));
Utils.bitmapToMat(SourceImage, srcSource);
/// Convert to HSV
Imgproc.cvtColor(srcRef, hsvRef, Imgproc.COLOR_BGR2HSV);
Imgproc.cvtColor(srcSource, hsvSource, Imgproc.COLOR_BGR2HSV);
/// Using 50 bins for hue and 60 for saturation
int hBins = 50;
int sBins = 60;
MatOfInt histSize = new MatOfInt(hBins, sBins);
// hue varies from 0 to 179, saturation from 0 to 255
MatOfFloat ranges = new MatOfFloat(0f,180f,0f,256f);
// we compute the histogram from the 0-th and 1-st channels
MatOfInt channels = new MatOfInt(0, 1);
Mat histRef = new Mat();
Mat histSource = new Mat();
ArrayList<Mat> histImages=new ArrayList<Mat>();
histImages.add(hsvRef);
Imgproc.calcHist(histImages,
channels,
new Mat(),
histRef,
histSize,
ranges,
false);
Core.normalize(histRef,
histRef,
0,
1,
Core.NORM_MINMAX,
-1,
new Mat());
histImages=new ArrayList<Mat>();
histImages.add(hsvSource);
Imgproc.calcHist(histImages,
channels,
new Mat(),
histSource,
histSize,
ranges,
false);
Core.normalize(histSource,
histSource,
0,
1,
Core.NORM_MINMAX,
-1,
new Mat());
double resp1 = Imgproc.compareHist(histRef, histSource, 0);
double resp2 = Imgproc.compareHist(histRef, histSource, 1);
double resp3 = Imgproc.compareHist(histRef, histSource, 2);
double resp4 = Imgproc.compareHist(histRef, histSource, 3);