2006.02.20 21:20 "Re: [Tiff] TIFFReadScanline query", by Chris Cox

That sounds like you¹re getting the thumbnail image and not the full size image.

Are you sure this camera isn¹t saving a RAW file and you¹re just reading the RGB thumbnail?

Chris

On 2/19/06 11:54 PM, "Benares" <benarestham@gmail.com> wrote:

I've some difficulty parsing the tiff image information into a raster array to hold these values, processing the raster data then write the resulting data into another tiff image. I've tried using the TIFFReadScanline function to parse these data, however my image would not appear as the original. I'm wondering where actually went wrong. Could anybody help advise?

My tiff file is extracted from a Kodak digital camera model DC290. The default file information are as follows.

IMAGEWIDTH: 720
IMAGEHEIGHT: 480
SAMPLESPERPIXEL: 3
ROWSPERSTRIP: 3
BITSPERSAMPLE: 8
PLANARCONFIG: 1 (Chunky)
ORIENTATION: 1 (Top-Left)
PHOTOMETRIC: 2 (RGB)

====================Reading in the image information into pic_buffer================

    int j, k, row_counter, offset;

    tsize_t ScanlineSize = TIFFScanlineSize(tiffRead);        //ScanlineSize

= 2160 = 720*3

    uint32* pic_buffer = (uint32*)_TIFFmalloc(sizeof(uint32) * imageWidth *

imageHeight);
    uint32* line_buffer = (uint32*)_TIFFmalloc(sizeof(uint32) *
ScanlineSize);

    k=0;
    for (row_counter=0; row_counter<imageHeight; row_counter++)
    {
        TIFFReadScanline(tiffRead, line_buffer, row_counter);
        for( j=0; j<ScanlineSize; j+=3 ) //reading RGB value from
file and combining into pixel[k]
        {
            pic_buffer[k] = ( ((((uint32)line_buffer[j]) <<8<<8
)&0x00FF0000)

                            | ((((uint32)line_buffer[j+1]) <<8 )&0x0000FF00)
                            | (((uint32)line_buffer[j+2])&0x000000FF) );

            k++;
        }
    }

====================Reading in the image information into pic_buffer================

=====================Writing the image information into output.tif=================

    for (row_counter=0; row_counter<imageHeight; row_counter++)
    {
        k=0;
        offset = row_counter*imageWidth;
        for (j=0; j<imageWidth; j++)
        {
            line_buffer[k] =
(uint32)((pic_buffer[j+offset]&0x00FF0000)>>8>>8); //Red content
            line_buffer[k+1] =
(uint32)((pic_buffer[j+offset]&0x0000FF00)>>8); //Green content
            line_buffer[k+2] = (uint32)(pic_buffer[j+offset]&0x000000FF);
        //Blue content
            k+=3;
        }
        TIFFWriteScanline(tiffWrite, line_buffer, row_counter, 0);
    }

=====================Writing the image information into output.tif=================

Thanks to all whom have read and/or made a reply to this amateurish entry.