RGB-HSv.zip_HSV _RGB，HSV_hsv红色调色板

#define WIN32_LEAN_AND_MEAN // Exclude rarely-used stuff from Windows headers //#include <stdio.h> //#include <tchar.h> #include <cstdio> // Used for "printf" #include <string> // Used for C++ strings #include <iostream> // Used for C++ cout print statements //#include <cmath> // Used to calculate square-root for statistics // Include OpenCV libraries #include <cv.h> #include <cvaux.h> #include <cxcore.h> #include <highgui.h> #include "ImageUtils.h" // easy image cropping, resizing, rotating, etc using namespace std; const int HUE_RANGE = 180; // OpenCV just uses Hues between 0 to 179! //const int HUE_RANGE = 256; // OpenCV just uses Hues between 0 to 179! const int WIDTH = 361; // Window size const int HEIGHT = 306; // " const int HUE_HEIGHT = 25; // thickness of Hue chart const int WHEEL_TOP = HUE_HEIGHT + 20; // y position for top of color wheel (= Hue height + gap) const int WHEEL_BOTTOM = WHEEL_TOP + 255; // y position for bottom of color wheel const int TILE_LEFT = 280; // Position of small tile showing highlighted color const int TILE_TOP = 140; // " const int TILE_W = 60; // " const int TILE_H = 60; // " char *windowMain = "HSV Color Wheel. Click a color, or press ESC to quit"; // title of the window int hue = 90; // This variable is adjusted by the user's trackbar at runtime. int saturation = 240; // " int brightness = 200; // " int mouseX = -1; // Position in the window that a user clicked the mouse button. int mouseY = -1; // " void displayColorWheelHSV(void) { IplImage *imageHSV = cvCreateImage(cvSize(WIDTH, HEIGHT), 8, 3); int h = imageHSV->height; // Pixel height int w = imageHSV->width; // Pixel width int rowSize = imageHSV->widthStep; // Size of row in bytes, including extra padding char *imOfs = imageHSV->imageData; // Pointer to the start of the image HSV pixels. // Clear the image to grey (Saturation=0) cvSet(imageHSV, cvScalar(0,0,210, 0)); // Draw the hue chart on the top, at double width. for (int y=0; y<HUE_HEIGHT; y++) { for (int x=0; x<HUE_RANGE; x++) { uchar h = x; // Hue (0 - 179) uchar s = 255; // max Saturation => most colorful uchar v = 255; // max Value => brightest color // Highlight the current value if ((h == hue-2 || h == hue+2) && (y < HUE_HEIGHT/2)) { s = 0; // make it white instead of the color } // Set the HSV pixel components *(uchar*)(imOfs + y*rowSize + (x*2+0)*3 + 0) = h; *(uchar*)(imOfs + y*rowSize + (x*2+0)*3 + 1) = s; *(uchar*)(imOfs + y*rowSize + (x*2+0)*3 + 2) = v; *(uchar*)(imOfs + y*rowSize + (x*2+1)*3 + 0) = h; *(uchar*)(imOfs + y*rowSize + (x*2+1)*3 + 1) = s; *(uchar*)(imOfs + y*rowSize + (x*2+1)*3 + 2) = v; } } // Draw the color wheel: Saturation on the x-axis and Value (brightness) on the y-axis. for ( y=0; y<255; y++) { for (int x=0; x<255; x++) { uchar h = hue; // Hue (0 - 179) uchar s = x; // Saturation (0 - 255) uchar v = (255-y); // Value (Brightness) (0 - 255) // Highlight the current value if ((s == saturation-2 || s == saturation-3 || s == saturation+2 || s == saturation+3) && (v == brightness-2 || v == brightness-3 || v == brightness+2 || v == brightness+3)) { s = 0; // make it white instead of the color v = 0; // bright white } // Set the HSV pixel components *(uchar*)(imOfs + (y+WHEEL_TOP)*rowSize + x*3 + 0) = h; *(uchar*)(imOfs + (y+WHEEL_TOP)*rowSize + x*3 + 1) = s; *(uchar*)(imOfs + (y+WHEEL_TOP)*rowSize + x*3 + 2) = v; } } // Draw a small tile of the highlighted color. for ( y=0; y<TILE_H; y++) { for (int x=0; x<TILE_W; x++) { // Set the HSV pixel components *(uchar*)(imOfs + (y+TILE_TOP)*rowSize + (x+TILE_LEFT)*3 + 0) = hue; *(uchar*)(imOfs + (y+TILE_TOP)*rowSize + (x+TILE_LEFT)*3 + 1) = saturation; *(uchar*)(imOfs + (y+TILE_TOP)*rowSize + (x+TILE_LEFT)*3 + 2) = brightness; } } // Convert the HSV image to RGB (BGR) for displaying IplImage *imageRGB = cvCreateImage(cvSize(imageHSV->width, imageHSV->height), 8, 3); cvCvtColor(imageHSV, imageRGB, CV_HSV2BGR); // (note that OpenCV stores RGB images in B,G,R order. // Get the highlighted color's RGB (BGR) values h = imageRGB->height; // Pixel height w = imageRGB->width; // Pixel width rowSize = imageRGB->widthStep; // Size of row in bytes, including extra padding imOfs = imageRGB->imageData; // Pointer to the start of the image HSV pixels. uchar R = *(uchar*)(imOfs + (255-brightness + WHEEL_TOP)*rowSize + (saturation)*3 + 2); // Red uchar G = *(uchar*)(imOfs + (255-brightness + WHEEL_TOP)*rowSize + (saturation)*3 + 1); // Green uchar B = *(uchar*)(imOfs + (255-brightness + WHEEL_TOP)*rowSize + (saturation)*3 + 0); // Blue cout << "H:" << hue << ", S:" << saturation << ", V:" << brightness << " -> R:" << (int)R << ", G:" << (int)G << ", B:" << (int)B << endl; // Display the RGB image cvShowImage(windowMain, imageRGB); cvReleaseImage( &imageRGB ); cvReleaseImage( &imageHSV ); } // This function is automatically called whenever the user changes the trackbar value. void hue_trackbarWasChanged(int) { displayColorWheelHSV(); } // This function is automatically called whenever the user clicks the mouse in the window. void mouseEvent( int ievent, int x, int y, int flags, void* param ) { // Check if they clicked or dragged a mouse button or not. if (flags & CV_EVENT_FLAG_LBUTTON) { mouseX = x; mouseY = y; //cout << mouseX << "," << mouseY << endl; // If they clicked on the Hue chart, select the new hue. if (mouseY < HUE_HEIGHT) { if (mouseX/2 < HUE_RANGE) { // Make sure its a valid Hue hue = mouseX/2; cvSetTrackbarPos("Hue", windowMain, hue); // update the GUI Trackbar // Note that "cvSetTrackbarPos()" will implicitly call "displayColorWheelHSV()" for a changed hue. //displayColorWheelHSV(); } } // If they clicked on the Color wheel, select the new value. else if (mouseY >= WHEEL_TOP && mouseY <= WHEEL_BOTTOM) { if (mouseX < 256) { // Make sure its a valid Saturation & Value saturation = mouseX; brightness = 255 - (mouseY - WHEEL_TOP); cvSetTrackbarPos("Saturation", windowMain, saturation); // update the GUI Trackbar cvSetTrackbarPos("Brightness", windowMain, brightness); // update the GUI Trackbar // Note that "cvSetTrackbarPos()" will implicitly call "displayColorWheelHSV()" for saturation or brightness. //displayColorWheelHSV(); } } } } // C++ entry point int main(int argc, char **argv) { cout << "HSV Color Wheel, by Shervin Emami (shervin.emami@gmail.com), 6th Nov 2009.\n"; cout << "Click on the top Hue map, or the bottom Color graph to change values.\n"; cout << "Hi the Escape key in the image window to quit.\n"; cout << endl << "Red, Green, Blue values of clicked colors:" << endl; // Create a GUI window cvNamedWindow(windowMain, 1); // Allow the user to change the Hue value upto 179, since OpenCV uses Hues upto 180. cvCreateTrackbar( "Hue", windowMain, &hue, HUE_RANGE-1, &hue_trackbarWasChanged ); cvCreateTrackbar( "Saturation", windowMain, &saturation, 255, &hue_trackbarWasChanged ); cvCreateTrackbar( "Brightness", windowMain, &brightness, 255, &hue_trackbarWasChanged ); // Allow the user to click on Hue chart to change the hue, or click on the color wheel to see a value. cvSetMouseCallback( windowMain, &mouseEvent, 0 ); displayColorWheelHSV(); // cvShowImage(windowMain, imageIn); cvWaitKey(); cvDestroyWindow(windowMain); return 0; }