[問題] opencv範例請教

看板C_and_CPP (C/C++)作者GN00505257 (...)時間16年前 (2009/08/13 22:53)推噓0(0推 0噓 8→)

留言8則, 2人參與討論串1/3 (看更多)

#include "stdafx.h" #include <cv.h> #include <highgui.h> int main( int argc, char** argv ) { IplImage* image; image=cvLoadImage("image", 1); { // Compute the HSV image and decompose it into separate planes. // IplImage* hsv = cvCreateImage( cvGetSize(image), 8, 3 ); cvCvtColor( image, hsv, CV_BGR2HSV ); IplImage* h_plane = cvCreateImage( cvGetSize(image), 8, 1 ); IplImage* s_plane = cvCreateImage( cvGetSize(image), 8, 1 ); IplImage* v_plane = cvCreateImage( cvGetSize(image), 8, 1 ); IplImage* planes[] = { h_plane, s_plane }; cvCvtPixToPlane( hsv, h_plane, s_plane, v_plane, 0 ); // Build the histogram and compute its contents. // int h_bins = 30, s_bins = 32; CvHistogram* hist; { int hist_size[] = { h_bins, s_bins }; float h_ranges[] = { 0, 180 }; // hue is [0,180] float s_ranges[] = { 0, 255 }; float* ranges[] = { h_ranges, s_ranges }; hist = cvCreateHist( 2, hist_size, CV_HIST_ARRAY, ranges, 1 ); } cvCalcHist( planes, hist, 0, 0 ); //Compute histogram cvNormalizeHist( hist, 1.0 ); //Normalize it // Create an image to use to visualize our histogram. // int scale = 10; IplImage* hist_img = cvCreateImage(cvSize( h_bins * scale, s_bins * scale ) ,8 , 3); cvZero( hist_img ); // populate our visualization with little gray squares. // float max_value = 0; cvGetMinMaxHistValue( hist, 0, &max_value, 0, 0 ); for( int h = 0; h < h_bins; h++ ) { for( int s = 100; s < s_bins; s++ ) { float bin_val = cvQueryHistValue_2D( hist, h, s ); int intensity = cvRound( bin_val * 255 / max_value ); cvRectangle( hist_img, cvPoint( h*scale, s*scale ), cvPoint( (h+1)*scale - 1, (s+1)*scale - 1), CV_RGB(intensity,intensity,intensity), CV_FILLED ); } } cvNamedWindow( "HSVtest1", 1 ); cvShowImage( "HSVtest1", image ); cvWaitKey(0); } } 這是從書上拿下來練習的範例想練習如何讓圖片只顯示想要的HUE值但很多部分看不懂為什麼要這麼做以及函數的功用煩請高手幫個忙謝謝@@ -- ※ 發信站: 批踢踢實業坊(ptt.cc) ◆ From: 163.25.118.133