Tracking mit RGB

Mouse Click mit Pfeiltasten

src/ofApp.cpp

@@ -17,9 +17,16 @@ void ofApp::update(){
     webcam.update();
 
     if (webcam.isFrameNew()) {
-        contour.setTargetColor(color);
-        contour.setThreshold(30);
-        contour.findContours(webcam);
+
+        rgb_immage.setFromPixels(webcam.getPixels());
+        rgb_immage.blurGaussian(5);
+        //hsv_immage = rgb_immage;
+        //hsv_immage.convertRgbToHsv();
+        //hsv_immage.blur();
+
+        contour.setTargetColor(color); /*, ofxCv::TRACK_COLOR_HSV*/
+        contour.setThreshold(20);
+        contour.findContours(rgb_immage);
         selection = 0;
         if (contour.size() != 0) {
             for (i = 1; i < contour.size(); i++) {
@@ -28,7 +35,7 @@ void ofApp::update(){
                 }
             }
             if ((color_picked == 1) && (contour.getContourArea(selection) != 0)) {
-                center = contour.getCenter(selection);
+                center_trapeze = contour.getCenter(selection);
             }
         }
         
@@ -39,13 +46,18 @@ void ofApp::update(){
 //--------------------------------------------------------------
 void ofApp::draw(){
     ofSetColor(255);
-    webcam.draw(0, 0);
+    rgb_immage.draw(0, 0);
 
     contour.draw();
     
     ofFill();
     ofSetColor(color);
-    ofDrawRectangle(webcam.getWidth(), 0, 128, 128);
+    ofDrawRectangle(rgb_immage.getWidth(), 0, 128, 128);
+    ofDrawLine(cp_top_left.x, cp_top_left.y, cp_top_right.x, cp_top_right.y);
+    ofDrawLine(cp_top_right.x, cp_top_right.y, cp_bottom_right.x, cp_bottom_right.y);
+    ofDrawLine(cp_bottom_right.x, cp_bottom_right.y, cp_bottom_left.x, cp_bottom_left.y);
+    ofDrawLine(cp_bottom_left.x, cp_bottom_left.y, cp_top_left.x, cp_top_left.y);
+    ofDrawLine(middle, cp_top_left.y, middle, cp_bottom_right.y);      
     if (color_picked == 1 && key_pressed == 0) {
         scaleTrapeze();
         scaleRectangel();
@@ -57,11 +69,27 @@ void ofApp::draw(){
 //--------------------------------------------------------------
 void ofApp::keyPressed(int key){
     key_pressed = 1;
+
+    if (key == 57358) {   
+        mouse_event(MOUSEEVENTF_LEFTDOWN, 0, 0, 0, 0);
+    }
+    else if (key == 57356) {
+        mouse_event(MOUSEEVENTF_RIGHTDOWN, 0, 0, 0, 0);
+    }
+    else if (key == ' ') {
+        select_colour = select_colour ^ 0x0001;
+    }
 }
 
 //--------------------------------------------------------------
 void ofApp::keyReleased(int key){
     key_pressed = 0;
+    if (key == 57358) {
+        mouse_event(MOUSEEVENTF_LEFTUP, 0, 0, 0, 0);
+    }
+    else if (key == 57356) {
+        mouse_event(MOUSEEVENTF_RIGHTUP, 0, 0, 0, 0);
+    }
 }
 
 //--------------------------------------------------------------
@@ -76,8 +104,8 @@ void ofApp::mouseDragged(int x, int y, int button){
 
 //--------------------------------------------------------------
 void ofApp::mousePressed(int x, int y, int button) {
-    if (calibrated == 4) {
-        color = webcam.getPixels().getColor(x, y);
+    if (calibrated == 4 && select_colour == 0x0001) {
+        color = rgb_immage.getPixels().getColor(x, y);
         printf("%i, %i, %i\n", color.r, color.g, color.b);
         printf("%f, %f, %f, %f \n", y_offset, y_scale, x_offset, x_scale);
         color_picked = 1;
@@ -94,15 +122,43 @@ void ofApp::mousePressed(int x, int y, int button) {
         }
         if (calibrated == 3) {
             GetCursorPos(&cp_bottom_left);
+            if (cp_top_left.x > cp_bottom_left.x)
+            {
+                x_offset = cp_bottom_left.x;
+            }
+            else
+            {
+                x_offset = cp_top_left.x;
+            }
 
-            x_offset = (cp_top_left.x + cp_bottom_left.x) / 2.0;
+            if (cp_top_right.x < cp_bottom_right.x)
+            {
+                x_scale = ofGetScreenWidth() / (cp_bottom_right.x - x_offset);
+            }
+            else
+            {
+                x_scale = ofGetScreenWidth() / (cp_top_right.x - x_offset);
+            }
             
-            x_scale = ofGetScreenWidth() / (cp_bottom_right.x - x_offset);
+            if (cp_top_left.y > cp_top_right.y)
+            {
+                y_offset = cp_top_right.y;
+            }
+            else
+            {
+                y_offset = cp_top_left.y;
+            }
             
-            y_offset = (cp_top_left.y + cp_top_right.y) / 2.0;
-
-            y_scale = ofGetScreenHeight() / ((cp_bottom_left.y + cp_bottom_right.y) / 2.0 - y_offset);
+            if (cp_bottom_left.y < cp_bottom_right.y)
+            {
+                y_scale = ofGetScreenHeight() / (cp_bottom_right.y - y_offset);
+            }
+            else
+            {
+                y_scale = ofGetScreenHeight() / (cp_bottom_left.y - y_offset);
+            }
            
+            printf("Y:%f \nX:%f\n", y_offset, x_offset);
         }
         calibrated++;
     }
@@ -140,19 +196,43 @@ void ofApp::dragEvent(ofDragInfo dragInfo){
 
 
 void ofApp::scaleTrapeze(void) {
-    left_pitch = (cp_top_left.y - cp_bottom_left.y) / (cp_top_left.x - cp_bottom_left.x);
-    right_pitch = (cp_top_right.y - cp_bottom_right.y) / (cp_top_right.x - cp_bottom_right.x);
-    middle = cp_top_right.x - cp_top_left.x;
-
-    if (center.x > middle) {
-        center.x = center.x + (((center.y - cp_top_right.y) / right_pitch) * ((cp_bottom_right.x - middle) - ((center.y - cp_top_right.y) / right_pitch)) / (center.x - middle));
+    left_pitch = (float)(cp_bottom_left.y - cp_top_left.y) / (float)(cp_bottom_left.x - cp_top_left.x);
+    right_pitch = (float) (cp_bottom_right.y - cp_top_right.y) / (float)(cp_bottom_right.x - cp_top_right.x);
+    middle = (cp_top_right.x + cp_top_left.x)/2;
+    stringstream out;
+    out.precision(2);
+    out << "Middle:" << middle; 
+    string message = out.str();
+    ofDrawBitmapString(message, 100, 100);
+    out.str("");
+    out << "rightpitch:" << right_pitch;
+    message = out.str();
+    ofDrawBitmapString(message, 100, 120);
+    out.str("");
+    out << "leftpitch:" << left_pitch;
+    message = out.str();
+    ofDrawBitmapString(message, 100, 140);
+    if (center_trapeze.x > middle) {
+        float mid_to_dot = center_trapeze.x - middle;
+        float distance_to_rect = ((cp_bottom_right.y - center_trapeze.y) / right_pitch);
+        float mid_to_max = (cp_bottom_right.x - middle) - distance_to_rect;
+        center_rect.x = center_trapeze.x + ((distance_to_rect) * ((mid_to_dot)/(mid_to_max)));
     }
     else {
-        center.x = center.x + (((center.y - cp_top_left.y) / left_pitch) * ((middle - cp_bottom_left.x) - ((center.y - cp_top_left.y) / left_pitch)) / (middle - center.x));
+        float mid_to_dot = middle - center_trapeze.x;
+        float distance_to_rect = ((cp_bottom_left.y - center_trapeze.y) / left_pitch);
+        float mid_to_max = (middle - cp_bottom_left.x) - distance_to_rect;
+        center_rect.x = center_trapeze.x + ((distance_to_rect) * ((mid_to_dot)/(mid_to_max)));
     }
 }
 
 void ofApp::scaleRectangel(void) {
-    cp_cursor_position.x = center.x * x_scale - x_offset;
-    cp_cursor_position.y = center.y * y_scale - y_offset;
+    cp_cursor_position.x = (center_rect.x - x_offset) * x_scale;
+    cp_cursor_position.y = (center_trapeze.y - y_offset )* y_scale ;
+    stringstream out;
+    out.precision(2);
+    out << "Cursor:" << "x" << cp_cursor_position.x << " | y"<< cp_cursor_position.y;
+    string message = out.str();
+    ofDrawBitmapString(message, 100, 160);
+    out.str("");
 }

src/ofApp.h

@@ -4,6 +4,9 @@
 #include "ofxOpenCv.h"
 #include "ofxCv.h"
 #include "windows.h"
+#include <string>       // std::string
+#include <iostream>     // std::cout
+#include <sstream>      // std::stringstream, std::stringbu
 
 class ofApp : public ofBaseApp{
 
@@ -27,8 +30,11 @@ class ofApp : public ofBaseApp{
 		void scaleTrapeze(void);
 
 		ofVideoGrabber webcam;
+		ofxCvColorImage rgb_immage;
+		ofxCvColorImage hsv_immage;
 		ofxCv::ContourFinder contour;
-		cv::Point2f center;
+		cv::Point2f center_trapeze;
+		cv::Point2f center_rect;
 		ofColor color;
 		ofColor color_red_laser;
 		int color_picked;
@@ -37,6 +43,7 @@ class ofApp : public ofBaseApp{
 		int biggest_contour;
 		unsigned int selection;
 		int calibrated;
+		int select_colour;
 		float y_scale;
 		float y_offset;
 		float x_scale;