TIFF Compression

[MGSteve]

I'm generating a 3355 x 2410 image and I need to have layers in the image, so as IM can't create layers within the PSD format at the moment, I'm having to use TIFF.

Problem is, it doens't seem to want to use a compression format at all.

Here's the code, but whatever compression format I try and use, it turns out a 48MB file.

Code: Select all

        $wPreview = $Preview->GenerateMaster($MasterFile,$ImageSetup->Fields,false);
        $Res = MagickSetImageFormat($wPreview,'TIFF');
        $Res = MagickSetImageCompression($wPreview,MW_ZIPCompression);
        MagickWriteImage($wPreview,"$ImageDir/$OrderID-{$Order->LineItems->Rows[$nCount]['order_line_id']}-production.tiff");
        DestroyMagickWand($wPreview);

Any idea as to why it won't accept any compression settings?

[MGSteve]

Also, if I manually convert the output (i.e. convert 25-23-production.tiff -compress lzw test.tiff) then it works fine, both with LZW and ZIP compression.

It just fails to use any compression when saving through MagickWand. The call to MagickSetImageCompression return true, by the way.

[magick]

The following code returned LZW and Zip compression for us as expected. We're using ImageMagick 6.5.1-0 and MagickWand for PHP 1.0.8:

• tiffinfo production.tiff
  TIFF Directory at offset 0x22b0 (8880)
  Image Width: 70 Image Length: 46
  Resolution: 72, 72 pixels/inch
  Bits/Sample: 8
  Compression Scheme: LZW
  Photometric Interpretation: RGB color
  FillOrder: msb-to-lsb
  Orientation: row 0 top, col 0 lhs
  Samples/Pixel: 3
  Rows/Strip: 39
  Planar Configuration: single image plane
  Page Number: 0-1
  DocumentName: production.tiff
  Software: ImageMagick 6.5.1-1 2009-04-02 Q16 OpenMP http://www.imagemagick.org
  Predictor: horizontal differencing 2 (0x2)

Code: Select all

<?php
   $magick_wand = NewMagickWand();
   $status = MagickReadImage($magick_wand,'rose.jpg');
   if ($status == 0) {
     echo 'Error 1: '.MagickGetExceptionString($magick_wand);
   }
   $status = MagickSetImageFormat($magick_wand,'TIFF');
   if ($status == 0) {
     echo 'Error 2: '.MagickGetExceptionString($magick_wand);
   }
   $status = MagickSetImageCompression($magick_wand,MW_LZWCompression);
   if ($status == 0) {
     echo 'Error 3: '.MagickGetExceptionString($magick_wand);
   }
   $status = MagickWriteImage($magick_wand,"production.tiff");
   if ($status == 0) {
     echo 'Error 4: '.MagickGetExceptionString($magick_wand);
   }
   DestroyMagickWand($magick_wand);
?>