Hi, I have two different images (Image A and Image B), whose histograms (histImage and histImage1) i have already computed..
Now I want that the histogram of Image A becomes the histogram of Image B.. so that the Image B gets the colors similar to Image A...
code is as follow:
include "stdafx.h"
include "opencv2/highgui/highgui.hpp"
include "opencv2/imgproc/imgproc.hpp"
include <iostream>
include <stdio.h>
using namespace std; using namespace cv; int main( ) { Mat src, dst, src1;
/// Load image src = imread("C:/Users/Waqas/Desktop/19juneexp/4.jpg", 1 ); // Image A src1 = imread("C:/Users/Waqas/Desktop/19juneexp/body.jpg", 1 ); // Image B
if( !src.data ) { return -1; }
/// Separate the image in 3 places ( B, G and R ) vector<mat> bgr_planes; vector<mat> bgr_planes1; split( src, bgr_planes ); split( src1, bgr_planes1 );
/// Establish the number of bins int histSize = 256;
/// Set the ranges ( for B,G,R) ) float range[] = { 0, 256 } ; const float* histRange = { range };
bool uniform = true; bool accumulate = false;
Mat b_hist, g_hist, r_hist; //ImageA Mat b_hist1, g_hist1, r_hist1; //ImageB
/// Compute the histograms of Image A calcHist( &bgr_planes[0], 1, 0, Mat(), b_hist, 1, &histSize, &histRange, uniform, accumulate ); calcHist( &bgr_planes[1], 1, 0, Mat(), g_hist, 1, &histSize, &histRange, uniform, accumulate ); calcHist( &bgr_planes[2], 1, 0, Mat(), r_hist, 1, &histSize, &histRange, uniform, accumulate ); /// Compute the histograms of Image B calcHist( &bgr_planes1[0], 1, 0, Mat(), b_hist1, 1, &histSize, &histRange, uniform, accumulate ); calcHist( &bgr_planes1[1], 1, 0, Mat(), g_hist1, 1, &histSize, &histRange, uniform, accumulate ); calcHist( &bgr_planes1[2], 1, 0, Mat(), r_hist1, 1, &histSize, &histRange, uniform, accumulate );
// Draw the histograms for B, G and R int hist_w = 512; int hist_h = 400; //Image A int bin_w = cvRound( (double) hist_w/histSize ); //Image A int hist_w1 = 512; int hist_h1 = 400; //Image B int bin_w1 = cvRound( (double) hist_w1/histSize );//Image B
Mat histImage( hist_h, hist_w, CV_8UC3, Scalar( 0,0,0) ); //ImageA Mat histImage1( hist_h1, hist_w1, CV_8UC3, Scalar( 0,0,0) ); //ImageB
/// Normalize the result to [ 0, histImage.rows ] ImageA normalize(b_hist, b_hist, 0, histImage.rows, NORM_MINMAX, -1, Mat() ); normalize(g_hist, g_hist, 0, histImage.rows, NORM_MINMAX, -1, Mat() ); normalize(r_hist, r_hist, 0, histImage.rows, NORM_MINMAX, -1, Mat() ); /// Normalize the result to [ 0, histImage.rows ] ImageB normalize(b_hist1, b_hist1, 0, histImage.rows, NORM_MINMAX, -1, Mat() ); normalize(g_hist1, g_hist1, 0, histImage.rows, NORM_MINMAX, -1, Mat() ); normalize(r_hist1, r_hist1, 0, histImage.rows, NORM_MINMAX, -1, Mat() );
/// Draw for each channel ImageA for( int i = 1; i < histSize; i++ ) { line( histImage, Point( bin_w(i-1), hist_h - cvRound(b_hist.at<float>(i-1)) ) , Point( bin_w(i), hist_h - cvRound(b_hist.at<float>(i)) ), Scalar( 255, 0, 0), 2, 8, 0 ); line( histImage, Point( bin_w(i-1), hist_h - cvRound(g_hist.at<float>(i-1)) ) , Point( bin_w(i), hist_h - cvRound(g_hist.at<float>(i)) ), Scalar( 0, 255, 0), 2, 8, 0 ); line( histImage, Point( bin_w(i-1), hist_h - cvRound(r_hist.at<float>(i-1)) ) , Point( bin_w(i), hist_h - cvRound(r_hist.at<float>(i)) ), Scalar( 0, 0, 255), 2, 8, 0 ); } //////////////////////////////////////////////////// /// Draw for each channel ImageB for( int i = 1; i < histSize; i++ ) { line( histImage1, Point( bin_w1(i-1), hist_h1 - cvRound(b_hist1.at<float>(i-1)) ) , Point( bin_w1(i), hist_h1 - cvRound(b_hist1.at<float>(i)) ), Scalar( 255, 0, 0), 2, 8, 0 ); line( histImage1, Point( bin_w1(i-1), hist_h1 - cvRound(g_hist1.at<float>(i-1)) ) , Point( bin_w1(i), hist_h1 - cvRound(g_hist1.at<float>(i)) ), Scalar( 0, 255, 0), 2, 8, 0 ); line( histImage1, Point( bin_w1(i-1), hist_h1 - cvRound(r_hist1.at<float>(i-1)) ) , Point( bin_w1(i), hist_h1 - cvRound(r_hist1.at<float>(i)) ), Scalar( 0, 0, 255), 2, 8, 0 ); } /////////////////////////////////////////////////////
/// Display namedWindow("calcHist", CV_WINDOW_AUTOSIZE ); imshow("face ", histImage ); //Histogram of Image A /// Display namedWindow("calcHist1", CV_WINDOW_AUTOSIZE ); imshow("body ", histImage1 ); //Histogram of Image B
waitKey(0);
return 0; }
