mirror of
https://github.com/opencv/opencv.git
synced 2024-12-11 06:29:13 +08:00
106 lines
3.0 KiB
C++
106 lines
3.0 KiB
C++
#include "opencv2/imgproc.hpp"
|
|
#include "opencv2/highgui.hpp"
|
|
#include "opencv2/videoio.hpp"
|
|
#include <iostream>
|
|
|
|
using namespace cv;
|
|
|
|
/** Global Variables */
|
|
const int max_value_H = 360/2;
|
|
const int max_value = 255;
|
|
const String window_capture_name = "Video Capture";
|
|
const String window_detection_name = "Object Detection";
|
|
int low_H = 0, low_S = 0, low_V = 0;
|
|
int high_H = max_value_H, high_S = max_value, high_V = max_value;
|
|
|
|
//! [low]
|
|
static void on_low_H_thresh_trackbar(int, void *)
|
|
{
|
|
low_H = min(high_H-1, low_H);
|
|
setTrackbarPos("Low H", window_detection_name, low_H);
|
|
}
|
|
//! [low]
|
|
|
|
//! [high]
|
|
static void on_high_H_thresh_trackbar(int, void *)
|
|
{
|
|
high_H = max(high_H, low_H+1);
|
|
setTrackbarPos("High H", window_detection_name, high_H);
|
|
}
|
|
|
|
//! [high]
|
|
static void on_low_S_thresh_trackbar(int, void *)
|
|
{
|
|
low_S = min(high_S-1, low_S);
|
|
setTrackbarPos("Low S", window_detection_name, low_S);
|
|
}
|
|
|
|
static void on_high_S_thresh_trackbar(int, void *)
|
|
{
|
|
high_S = max(high_S, low_S+1);
|
|
setTrackbarPos("High S", window_detection_name, high_S);
|
|
}
|
|
|
|
static void on_low_V_thresh_trackbar(int, void *)
|
|
{
|
|
low_V = min(high_V-1, low_V);
|
|
setTrackbarPos("Low V", window_detection_name, low_V);
|
|
}
|
|
|
|
static void on_high_V_thresh_trackbar(int, void *)
|
|
{
|
|
high_V = max(high_V, low_V+1);
|
|
setTrackbarPos("High V", window_detection_name, high_V);
|
|
}
|
|
|
|
int main(int argc, char* argv[])
|
|
{
|
|
//! [cap]
|
|
VideoCapture cap(argc > 1 ? atoi(argv[1]) : 0);
|
|
//! [cap]
|
|
|
|
//! [window]
|
|
namedWindow(window_capture_name);
|
|
namedWindow(window_detection_name);
|
|
//! [window]
|
|
|
|
//! [trackbar]
|
|
// Trackbars to set thresholds for HSV values
|
|
createTrackbar("Low H", window_detection_name, &low_H, max_value_H, on_low_H_thresh_trackbar);
|
|
createTrackbar("High H", window_detection_name, &high_H, max_value_H, on_high_H_thresh_trackbar);
|
|
createTrackbar("Low S", window_detection_name, &low_S, max_value, on_low_S_thresh_trackbar);
|
|
createTrackbar("High S", window_detection_name, &high_S, max_value, on_high_S_thresh_trackbar);
|
|
createTrackbar("Low V", window_detection_name, &low_V, max_value, on_low_V_thresh_trackbar);
|
|
createTrackbar("High V", window_detection_name, &high_V, max_value, on_high_V_thresh_trackbar);
|
|
//! [trackbar]
|
|
|
|
Mat frame, frame_HSV, frame_threshold;
|
|
while (true) {
|
|
//! [while]
|
|
cap >> frame;
|
|
if(frame.empty())
|
|
{
|
|
break;
|
|
}
|
|
|
|
// Convert from BGR to HSV colorspace
|
|
cvtColor(frame, frame_HSV, COLOR_BGR2HSV);
|
|
// Detect the object based on HSV Range Values
|
|
inRange(frame_HSV, Scalar(low_H, low_S, low_V), Scalar(high_H, high_S, high_V), frame_threshold);
|
|
//! [while]
|
|
|
|
//! [show]
|
|
// Show the frames
|
|
imshow(window_capture_name, frame);
|
|
imshow(window_detection_name, frame_threshold);
|
|
//! [show]
|
|
|
|
char key = (char) waitKey(30);
|
|
if (key == 'q' || key == 27)
|
|
{
|
|
break;
|
|
}
|
|
}
|
|
return 0;
|
|
}
|