我使用openCV庫來獲取圖像中的相似度百分比。我使用了返回double值的openCv庫的compareHist函數,在這個函數中傳入了不同的方法名(int值),併爲每個Mehod得到了不同的結果。現在如何對這些double值做出決定?如何使用openCv獲得圖像中的相似度百分比?
Mat src_base, hsv_base;
Mat src_test1, hsv_test1;
// Mat src_test2, hsv_test2;
Mat hsv_half_down;
String baseImgPath = [baseImagePath UTF8String];
String firstCmpImgPath = [firstCmpImagePath UTF8String];//compare image path
src_base = imread(baseImgPath, 1); read source image
src_test1 = imread(firstCmpImgPath, 1); read compared image
// src_test2 = imread(secondCmpImgPath, 1);
if(!src_base.data || !src_test1.data /*||!src_test2.data*/)
{
return nil;
}
cvtColor(src_base, hsv_base, COLOR_BGR2HSV);
cvtColor(src_test1, hsv_test1, COLOR_BGR2HSV);
//cvtColor(src_test2, hsv_test2, COLOR_BGR2HSV);
hsv_half_down = hsv_base(Range(hsv_base.rows/2, hsv_base.rows - 1), Range(0, hsv_base.cols - 1));
/// Using 50 bins for hue and 60 for saturation
int h_bins = 50; int s_bins = 60;
int histSize[] = { h_bins, s_bins };
// hue varies from 0 to 179, saturation from 0 to 255
float h_ranges[] = { 0, 180 };
float s_ranges[] = { 0, 256 };
const float* ranges[] = { h_ranges, s_ranges };
// Use the o-th and 1-st channels
int channels[] = { 0, 1 };
/// Histograms
MatND hist_base;
MatND hist_half_down;
MatND hist_test1;
MatND hist_test2;
/// Calculate the histograms for the HSV images
calcHist(&hsv_base, 1, channels, Mat(), hist_base, 2, histSize, ranges, true, false);
normalize(hist_base, hist_base, 0, 1, NORM_MINMAX, -1, Mat());
calcHist(&hsv_half_down, 1, channels, Mat(), hist_half_down, 2, histSize, ranges, true, false);
normalize(hist_half_down, hist_half_down, 0, 1, NORM_MINMAX, -1, Mat());
calcHist(&hsv_test1, 1, channels, Mat(), hist_test1, 2, histSize, ranges, true, false);
normalize(hist_test1, hist_test1, 0, 1, NORM_MINMAX, -1, Mat());
for(int i = 0; i < 4; i++)
{
int compare_method = i;
double base_test1 = compareHist(hist_base, hist_test1, compare_method);
}
compare method are CV_COMP_CORREL, CV_COMP_CHISQR , CV_COMP_INTERSECT , CV_COMP_BHATTACHARYYA
Reference link http://docs.opencv.org/doc/tutorials/imgproc/histograms/histogram_comparison/histogram_comparison.html
你想要什麼類型的決策,採取?你想決定一幅圖像是否屬於某個類別? – VAndrei 2014-10-13 12:16:28
我想知道原始圖像和其他圖像之間的差異百分比,它與原始圖像相似,但有一些差異.........我們可以通過使用位圖來實現,但我想通過使用像照片清掃應用直方圖做... – 2014-10-13 12:33:52