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RE: pngread does not read 12bit gray images
From: |
John W. Eaton |
Subject: |
RE: pngread does not read 12bit gray images |
Date: |
Wed, 16 Jul 2008 18:59:53 -0400 |
On 16-Jul-2008, de Almeida, Valmor F. wrote:
| Thank you for pointing this out. I currently read 12-bit png images as
| follows
|
| Y = __magick_read__(filename);
|
| Y = bitshift(Y,-4);
|
| and this matches the info from running imagemagick identify on the file.
|
| imread() should not be used if you have libpng on your system because
| this will call a reader that converts the 12-bit data to 8-bit data, and
| that is not good.
The imread function will be included in the next major release of
Octave, but it won't use pngread or jpgread. Instead, it will only
use GraphicsMagick++ to read image files.
jwe
- pngread does not read 12bit gray images, de Almeida, Valmor F., 2008/07/05
- Re: pngread does not read 12bit gray images, Søren Hauberg, 2008/07/06
- RE: pngread does not read 12bit gray images, de Almeida, Valmor F., 2008/07/11
- RE: pngread does not read 12bit gray images, Søren Hauberg, 2008/07/11
- Re: pngread does not read 12bit gray images, Bill Denney, 2008/07/11
- Re: pngread does not read 12bit gray images, Søren Hauberg, 2008/07/11
- RE: pngread does not read 12bit gray images, de Almeida, Valmor F., 2008/07/11
- Message not available
- Message not available
- Re: pngread does not read 12bit gray images, Bill Denney, 2008/07/14
- RE: pngread does not read 12bit gray images, de Almeida, Valmor F., 2008/07/16
- RE: pngread does not read 12bit gray images,
John W. Eaton <=
- RE: pngread does not read 12bit gray images, Søren Hauberg, 2008/07/17
- Re: pngread does not read 12bit gray images, Bill Denney, 2008/07/17
- Re: pngread does not read 12bit gray images, Søren Hauberg, 2008/07/20
- RE: pngread does not read 12bit gray images, de Almeida, Valmor F., 2008/07/17
Re: pngread does not read 12bit gray images, Bengt-Arne Fjellner, 2008/07/10