Imread doesn't read PGM Image

laurent.berger · April 18, 2024, 3:26pm

No I don’t think code show is revelvant because in debug I reach this code

opencv/opencv/blob/c577b2440643bf98942cfd8c49478c545c3fa56b/modules/imgcodecs/src/grfmt_pxm.cpp#L304


      
                      src[x] = gray_palette[code];
                  else
                      ((ushort *)src)[x] = (ushort)code;
              }
          }
          else
          {
              m_strm.getBytes( src, src_pitch );
              if( bit_depth == 16 && !isBigEndian() )
              {
                  for (int x = 0; x < width3; x++)
                  {
                      uchar v = src[x * 2];
                      src[x * 2] = src[x * 2 + 1];
                      src[x * 2 + 1] = v;
                  }
              }
          }
          
          if( img.depth() == CV_8U && bit_depth == 16 )
          {

and later

github.com

opencv/opencv/blob/c577b2440643bf98942cfd8c49478c545c3fa56b/modules/imgcodecs/src/grfmt_pxm.cpp#L317


      
                      src[x * 2] = src[x * 2 + 1];
                      src[x * 2 + 1] = v;
                  }
              }
          }
          
          if( img.depth() == CV_8U && bit_depth == 16 )
          {
              for (int x = 0; x < width3; x++)
              {
                  int v = ((ushort *)src)[x];
                  src[x] = (uchar)(v >> 8);
              }
          }
          
          if( m_bpp == 8 ) // image has one channel
          {
              if( color )
              {
                  if( img.depth() == CV_8U ) {
                      uchar *d = data, *s = src, *end = src + m_width;

Topic		Replies	Views
Diagnosing imread failure windows , build , debug-release-mix	6	2172	February 1, 2021
Imread returns null C++ imgcodecs	6	1458	November 22, 2021
WebP image does not work C++ imgcodecs	0	412	August 9, 2021
Undefined reference to imread: -l and pkg-config not working C++ build	2	1245	May 31, 2022
OpenCV 4.7 C++17 Windows 10 - imread warn cutoff, empty return C++ build	9	4335	February 23, 2023

Imread doesn't read PGM Image

Related topics