On Thu, Dec 11, 2008 at 8:15 PM, <[email protected]> wrote: >> correctly done, since ghfaxviewer cannot display the new image. > > TIFF supports a wide variety of image types and some viewers can only deal > with > a subset of the image types. > >> convert file.tif -density 200x100 resampled_file.tif > > You probably want > > convert file.tif -resample 200x100 resampled_file.tif > > Post the output of > > tiffinfo file.tif > tiffinfo resampled_file.tif > > so wee can determine how resampled_file.tif differs from file.tif. >
Using 'convert file.tif -resample 200x100 resampled_file.tif' gives a file which cannot be displayed. tiffinfo file.tif TIFF Directory at offset 0x8 (8) Subfile Type: multi-page document (2 = 0x2) Image Width: 1728 Image Length: 2292 Resolution: 204, 196 pixels/inch Bits/Sample: 1 Compression Scheme: CCITT Group 4 Photometric Interpretation: min-is-white FillOrder: lsb-to-msb Orientation: row 0 top, col 0 lhs Samples/Pixel: 1 Rows/Strip: 2292 Planar Configuration: single image plane Page Number: 0-0 Software: ESP Ghostscript 7.07 DateTime: 2007:02:14 21:32:40 Group 4 Options: (0 = 0x0) tiffinfo resampled_file.tif TIFF Directory at offset 0x3f8be (260286) Subfile Type: multi-page document (2 = 0x2) Image Width: 1694 Image Length: 1169 Resolution: 200, 100 pixels/inch Bits/Sample: 16 Compression Scheme: PackBits Photometric Interpretation: min-is-black FillOrder: lsb-to-msb Orientation: row 0 top, col 0 lhs Samples/Pixel: 1 Rows/Strip: 2 Planar Configuration: single image plane DocumentName: resampled_send_file_mp.tif Software: ImageMagick 6.3.5 05/26/08 Q16 http://www.imagemagick.org DateTime: 2007:02:14 21:32:40 >From the above output it can be seen that the compression scheme of the resampled file is PackBits, not a valid compression scheme for a class F TIFF file, as was the original. Using 'convert file.tif -density 200x100 resampled_file.tif', seems to produce the desired output, but, as said in my previous message, ghfaxviewer has problems viewing this new file. tiffinfo resampled_file.tif TIFF Directory at offset 0x1b22 (6946) Subfile Type: multi-page document (2 = 0x2) Image Width: 1728 Image Length: 2292 Resolution: 200, 100 pixels/inch Bits/Sample: 1 Compression Scheme: CCITT Group 4 Photometric Interpretation: min-is-black FillOrder: lsb-to-msb Orientation: row 0 top, col 0 lhs Samples/Pixel: 1 Rows/Strip: 2292 Planar Configuration: single image plane DocumentName: resampled_send_file_mp.tif Software: ImageMagick 6.3.5 05/26/08 Q16 http://www.imagemagick.org DateTime: 2007:02:14 21:32:40 regards -- Bogdan Cristea _______________________________________________ Magick-users mailing list [email protected] http://studio.imagemagick.org/mailman/listinfo/magick-users
