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C++ 访问负像素值OpenCV IplImage*pRGBImg=cvLoadImage（input_file.c_str（），CV_LOAD_IMAGE_不变）； int width=pRGBImg->width； int height=pRGBImg->height； int bpp=pRGBImg->nChannels； 对于（int i=0；i_C++_Opencv - Fatal编程技术网
Fatal编程技术网
  • cplusplus/
  • C++ 访问负像素值OpenCV IplImage*pRGBImg=cvLoadImage（input_file.c_str（），CV_LOAD_IMAGE_不变）； int width=pRGBImg->width； int height=pRGBImg->height； int bpp=pRGBImg->nChannels； 对于（int i=0；i

C++ 访问负像素值OpenCV IplImage*pRGBImg=cvLoadImage（input_file.c_str（），CV_LOAD_IMAGE_不变）； int width=pRGBImg->width； int height=pRGBImg->height； int bpp=pRGBImg->nChannels； 对于（int i=0；i

c++ opencv

C++ 访问负像素值OpenCV IplImage*pRGBImg=cvLoadImage（input_file.c_str（），CV_LOAD_IMAGE_不变）； int width=pRGBImg->width； int height=pRGBImg->height； int bpp=pRGBImg->nChannels； 对于（int i=0；i,c++,opencv,C++,Opencv,您可能正在将有符号字节值转换为int，而int可能会给出负值。请尝试以下代码： IplImage* pRGBImg = cvLoadImage(input_file.c_str(), CV_LOAD_IMAGE_UNCHANGED); int width = pRGBImg->width; int height = pRGBImg->height; int bpp = pRGBImg->nChannels; for (int i=0; i < width*heigh

您可能正在将有符号字节值转换为int，而int可能会给出负值。请尝试以下代码：

IplImage* pRGBImg = cvLoadImage(input_file.c_str(), CV_LOAD_IMAGE_UNCHANGED); 
int width = pRGBImg->width; 
int height = pRGBImg->height;
int bpp = pRGBImg->nChannels; 
for (int i=0; i < width*height*bpp; i+=bpp) 
{
  if (!(i % (width*bpp))) // print empty line for better readability
      std::cout << std::endl;

  std::cout << std::dec << "R:" << (int) pRGBImg->imageData[i] <<  
                          " G:" << (int) pRGBImg->imageData[i+1] <<  
                          " B:" << (int) pRGBImg->imageData[i+2] << " "; 
}

std:：cout使用uchar对我很有效


  std::cout << std::dec << "R:" << (unsigned int) pRGBImg->imageData[i] <<  
                          " G:" << (unsigned int) pRGBImg->imageData[i+1] <<  
                          " B:" << (unsigned int) pRGBImg->imageData[i+2] << " "; 



std:：cout

std::cout << std::dec << "R:" << (uchar) pRGBImg->imageData[i] <<  
                         "G:" << (uchar) pRGBImg->imageData[i+1] <<  
                         "B:" << (uchar) pRGBImg->imageData[i+2] << " ";