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| public static void main(String[] args) {
Mat hello =Imgcodecs.imread("data/lena.jpg");
List<Mat> bgrPlanes = new ArrayList<>();
Core.split(hello, bgrPlanes);
MatOfFloat histRange = new MatOfFloat(0, 256);
int histSize = 256;
boolean accumulate = false;
Mat bHist = new Mat(), gHist = new Mat(), rHist = new Mat();
Imgproc.calcHist(bgrPlanes, new MatOfInt(0), new Mat(), bHist, new MatOfInt(histSize),histRange,accumulate);
Imgproc.calcHist(bgrPlanes, new MatOfInt(1), new Mat(), gHist, new MatOfInt(histSize), histRange, accumulate);
Imgproc.calcHist(bgrPlanes, new MatOfInt(2), new Mat(), rHist, new MatOfInt(histSize), histRange, accumulate);
int histW = 512, histH = 400;
int binW = (int) Math.round((double) histW / histSize);
Mat histImage = new Mat( histH, histW, CvType.CV_8UC3, new Scalar( 255,255,255) );
Core.normalize(bHist, bHist, 0, histImage.rows()-20, Core.NORM_MINMAX);
Core.normalize(gHist, gHist, 0, histImage.rows()-20, Core.NORM_MINMAX);
Core.normalize(rHist, rHist, 0, histImage.rows()-20, Core.NORM_MINMAX);
float[] bHistData = new float[(int) (bHist.total() * bHist.channels())];
bHist.get(0, 0, bHistData);
System.out.println(Arrays.toString(bHistData));
float[] gHistData = new float[(int) (gHist.total() * gHist.channels())];
gHist.get(0, 0, gHistData);
float[] rHistData = new float[(int) (rHist.total() * rHist.channels())];
rHist.get(0, 0, rHistData);
for( int i = 1; i < histSize; i++ ) {
Imgproc.line(histImage, new Point(binW * (i - 1), histH - Math.round(bHistData[i - 1])),new Point(binW * (i), histH - Math.round(bHistData[i])), new Scalar(255, 0, 0), 2);
Imgproc.line(histImage, new Point(binW * (i - 1), histH - Math.round(gHistData[i - 1])),new Point(binW * (i), histH - Math.round(gHistData[i])), new Scalar(0, 255, 0), 2);
Imgproc.line(histImage, new Point(binW * (i - 1), histH - Math.round(rHistData[i - 1])),new Point(binW * (i), histH - Math.round(rHistData[i])), new Scalar(0, 0, 255), 2);
}
HighGui.imshow("histImage", histImage);
HighGui.imshow("hello", hello);
HighGui.waitKey(0);
System.exit(0);
}
|
