ios openCV 基本集成和简单应用
起因
还是为自己准备想自己前进!想研究一下opencv 素材!
参考
整合demo
该DEMO整合了 IJKPlayer GPUIMAGE OpenCv!等直播 视频相关的类!
附上部分测试效果
/**
openCv 每秒回调30次 代理
*/
- (void)processImage:(cv::Mat &)image{
//@[@"默认",@"反色",@"描边",@"人面识别",@"静态背景物体追踪"];
switch (self.indexType) {
case 0:{
break;
}
case 1:{
cv::Mat image_copy;
cv::cvtColor(image, image_copy, CV_BGRA2BGR);
// invert image
cv::bitwise_not(image_copy, image_copy);
cv::cvtColor(image_copy, image, CV_BGR2BGRA);
break;
}
case 2:{
cv::Mat gray;
cv::cvtColor(image, gray, CV_RGB2GRAY);
cv::GaussianBlur(gray, gray, cv::Size(5,5), 1.2,1.2);
cv::Mat edges;
Canny(gray,edges,0,50);
image.setTo(cv::Scalar::all(255));
image.setTo(cv::Scalar(0,128,255,255),edges);
break;
}
case 3:{
// 转为灰度
cv::Mat image_copy;
cv::cvtColor(image, image_copy, CV_BGR2GRAY);
// 检测人脸并储存
std::vector<cv::Rect>faces;
faceDetector.detectMultiScale(image_copy, faces,1.1,2,0|CV_HAAR_SCALE_IMAGE,cv::Size(30,30));
// 在每个人脸上画一个红色四方形
for(unsigned int i= 0;i < faces.size();i++)
{
const cv::Rect& face = faces[i];
cv::Point tl(face.x,face.y);
cv::Point br = tl + cv::Point(face.width,face.height);
// 四方形的画法
cv::Scalar magenta = cv::Scalar(0, 0, 255);
cv::rectangle(image, tl, br, magenta, 1, 4, 0);
// Parameters:
// img – Image.
// pt1 – Vertex of the rectangle.
// pt2 – Vertex of the rectangle opposite to pt1 .
// rec – Alternative specification of the drawn rectangle.
// color – Rectangle color or brightness (grayscale image).
// thickness – Thickness of lines that make up the rectangle. Negative values, like CV_FILLED , mean that the function has to draw a filled rectangle.
// lineType – Type of the line. See the line() description.
// shift – Number of fractional bits in the point coordinates.
}
break;
}
case 4:{
//背景要固定,并且单一内容,限制条件大!
cv::Mat image_copy;
cv::Mat frameDelta;
cv::Mat thresh;
cv::cvtColor(image, image_copy, CV_BGR2GRAY);
// cv::GaussianBlur(image_copy, image_copy, cv::Size(21,21), 0, 0);
if (firstMatFrame.data == NULL) {
firstMatFrame = image_copy;
}
cv::absdiff(firstMatFrame,image_copy,frameDelta);
cv::threshold(frameDelta, thresh, 50, 255, cv::THRESH_BINARY);
cv::dilate(thresh, thresh, NULL);
cv::Rect rect = cv::boundingRect(thresh);
cv::Point tl(rect.x,rect.y);
cv::Point br = tl + cv::Point(rect.width,rect.height);
// 四方形的画法
cv::Scalar magenta = cv::Scalar(0, 0, 255);
cv::rectangle(image, tl, br, magenta, 1, 4, 0);
break;
}
default:
break;
}
}
坑
1 引用问题
//必须放在最前
#ifdef __cplusplus
#import <opencv2/opencv.hpp>
#endif
