参数dstCn原来一直沿用CV_BGR2GRAY, CV_RGB2GRAY, CV_GRAY2BGR, CV_GRAY2RGB等格式,但最新几个版本的OpenCV已改为COLOR_BGR2GRAY类似形式,今天才看源代码imgproc.hpp才发现,但官方文档还没修改,如下图,如果程序中使用较新的版本OpenCV,采用CV_BGR2GRAY可能会一直出错。 新的OpenCV中imgproc.hpp的定义如下: en...
COLOR_HSV2RGB_FULL COLOR_HLS2BGR_FULL COLOR_HLS2RGB_FULL COLOR_LBGR2Lab COLOR_LRGB2Lab COLOR_LBGR2Luv COLOR_LRGB2Luv COLOR_Lab2LBGR COLOR_Lab2LRGB COLOR_Luv2LBGR COLOR_Luv2LRGB COLOR_BGR2YUVconvertbetweenRGB/BGRandYUV COLOR_RGB2YUV COLOR_YUV2BGR COLOR_YUV2RGB COLOR_YUV2RGB_NV12 ...
Mat img{Size(160,120), CV_8UC3, raw.data()}; Mat dst;//cvtColor(img, dst, CV_YUV2GRAY_UYVY);//cvtColor(img, dst, CV_YUV2GRAY_YUY2);//cvtColor(img, dst, CV_YUV2BGR_UYVY);//cvtColor(img, dst, CV_YUV2BGRA_UYVY);//cvtColor(img, dst, CV_YUV2BGR_YUY2);//cvtColor(img, ...
// NV12 to image+ (UIImage *)YUVtoUIImage:(int)w h:(int)h buffer:(unsigned char *)buffer {//YUV(NV12)-->CIImage--->UIImage ConversionNSDictionary *pixelAttributes=@{(NSString*)kCVPixelBufferIOSurfacePropertiesKey:@{}};CVPixelBufferRef pixelBuffer = NULL;CVReturn result = CVPixelBuf...
OpenCV颜⾊空间转换参数CV_BGR2GRAY改变 OpenCV的颜⾊空间转换函数：C++: void cvtColor(InputArray src, OutputArray dst, int code, int dstCn=0 )参数dstCn原来⼀直沿⽤CV_BGR2GRAY, CV_RGB2GRAY, CV_GRAY2BGR, CV_GRAY2RGB等格式，但最新⼏个版本的OpenCV已改为COLOR_BGR2GRAY类似形式，今天才看...
{"YUV2RGB_NV12", {NVCV_COLOR_YUV2RGB_NV12, NVCV_IMAGE_FORMAT_NV12, NVCV_IMAGE_FORMAT_RGB8 }}, }; // clang-format on if (auto it = codeMap.find(str); it != codeMap.end()) { return it->second; } else { throw std::invalid_argument("Unrecognized color code"); } } templa...
从CVImageBufferRef 里面获取yuv数据,转为yuv420(NV12) // AWVideoEncoder.m文件-(NSData*)convertVideoSmapleBufferToYuvData:(CMSampleBufferRef)videoSample{// 获取yuv数据// 通过CMSampleBufferGetImageBuffer方法,获得CVImageBufferRef。// 这里面就包含了yuv420(NV12)数据的指针CVImageBufferRef pixelBuffer=CMSample...
kCVPixelFormatType_422YpCbCr8_yuvs = 'yuvs',/* Component Y'CbCr 8-bit 4:2:2, ordered Y'0 Cb Y'1 Cr */ kCVPixelFormatType_422YpCbCr8FullRange = 'yuvf',/* Component Y'CbCr 8-bit 4:2:2, full range, ordered Y'0 Cb Y'1 Cr */ ...
The opencv/ffmpeg uses the cpu to convert video pix_fmt from original YUV to RGB24, which is slow. The ffmpegcv use the cuda to accelerate pix_fmt convertion. Use yuv420p or nv12 can save the cpu load and reduce the memory copy from CPU to GPU. The ffmpeg stores the image as HWC...
首先附上libyuv的下载链接,需要自取,后面会用到:链接:https://pan.baidu.com/s/1DwtD5QdeTDHYqkqMxkpI2Q 密码:ijsj #pragma mark - NV12转I420 /// NV12转I420 + (CVPixelBufferRef)I420PixelBufferWithNV12:(CVImageBufferRef)cvpixelBufferRef { ...