Problems creating 8bit BMP image

[Jens]

Hello,

I have problems with the creation of a 8 bit BMP image file. It does not work with the PHP Imagick class and also not work with "convert" in the console.

The installed version is: ImageMagick 6.2.4 02/10/07 Q16
PHP module version is: 2.1.1-rc1

[mkoppanen]

If the issue is present with the command-line tools, then I would assume the problems lies in your ImageMagick installation.

[Jens]

I'm not sure how I should feel at the moment.

I have took the latest version of ImageMagick (ImageMagick-6.3.9) and have compiled/installed it on my system. But no success with creating bmp images with 8 bit depth. What I got are 4 bit or 32 bit. But I have to have 8 bit for the stupid Cisco 7940 phone.

I have tried to create gif images and to convert them, I have tried to do some other nasty things without success.

The only way to change the color deep was to posterize the image. But I can set any value with the option depth or colors or colors and depth without any difference.

I'm looking for the option "I'm sure I know what I do, so do it now." but I haven't found it yet.

[Update] I saw that an identify tells me that my generated image is 8-bit, but Windows/Adobe tells me it is 32-bit:

Code: Select all

weather1.bmp BMP 90x56 90x56+0+0 PseudoClass 256c 8-bit 2.79883kb