swap colors/channels

[fmw42]

thank you, but i keep getting those artifacts

My result is perfectly fine on IM 6.7.9.6 Q16 Mac OSX Snow Leopard. What version of IM are you using and what platform?

[Tosyk]

i'm useing latest 6.7.9-4 version on win 7 x64
don't know what cause this strange dots over the image

[fmw42]

I edited my post above to show you the result.

Did you change the code from unix syntax to windows syntax?

What was your exact command line converted from mine?

[Tosyk]

I edited my post above to show you the result.

it looks great

Did you change the code from unix syntax to windows syntax?

ah, no

What was your exact command line converted from mine?

same as yours:

Code: Select all

convert Tex_0807_4.dds -channel rgba -separate +channel -swap 1,3 +delete -combine -channel B -evaluate set 100% +channel -colorspace sRGB Tex_0807_4_swap.png

maybe we can debugging somehow this process? because it's really strange

[fmw42]

In windows, you need to escape % as %%. Please review http://www.imagemagick.org/Usage/windows/

convert Tex_0807_4.dds -channel rgba -separate +channel -swap 1,3 +delete -combine -channel B -evaluate set 100%% +channel -colorspace sRGB Tex_0807_4_swap.png

[Tosyk]

In windows, you need to escape % as %%. Please review http://www.imagemagick.org/Usage/windows/

convert Tex_0807_4.dds -channel rgba -separate +channel -swap 1,3 +delete -combine -channel B -evaluate set 100%% +channel -colorspace sRGB Tex_0807_4_swap.png

it's true but, doesen't work for me either
but useing command:

Code: Select all

-channel rgba -separate

gives me an alpha with those artifacts, does it make sense?

[fmw42]

Sorry, I am out of ideas. The -channel rgba -separate was needed for my code to work. I do not know why it does not work for you. Perhaps you need to upgrade your libpng?

convert -list format

shows

PNG* PNG rw- Portable Network Graphics (libpng 1.4.11)


What version are you using?

Or try saving to gif or jpg or tif and see if that makes a difference.

[Tosyk]

i installed latest IM 6.7.9.7 Q16 and trying with many nothing helps, damn((
and png:
PNG* rw- Portable Network Graphics (libpng 1.5.11)

oh maan, what can we do? really losing my faith in convert.exe

p.s.:i remember that i'm useing it for year ago or something for extracting alpha and it works

[fmw42]

try saving to gif or jpg or tif and see if that makes a difference

[Tosyk]

try saving to gif or jpg or tif and see if that makes a difference

works the same

[fmw42]

Perhaps Anthony can shed some light. Perhaps my command line is not fully proper.

Also perhaps some other kind Windows user can try this and see if they get your results or not. It could be a Windows only bug.

[Tosyk]

Perhaps Anthony can shed some light. Perhaps my command line is not fully proper.

don't know this person

Also perhaps some other kind Windows user can try this and see if they get your results or not. It could be a Windows only bug.

so, i've check it on my work machine and the result is same, but method above working well with .tga textures, but not with .dds, that's odd

i've just converted those .dds files into .tga and .tga works great, without any artifacts at all, so probably problem in my .dds stuff on my pc, or something like that
any thoughts?

[fmw42]

Anthony is one of the IM developers. He is very knowledgeable about the command line.

I suppose it could be a bug on the Windows side for reading .dds files? I would suggest you post your issues and the fact that it works fine on other formats for the input to the Bugs forum with your example image and the command line that works on other input format.

[anthony]

Thye look like cell bit order was reversed. Perhaps the alpha channel is not being decoded in-correctly for .dds files

Alpha is hard to see, and it may have slipped under the radar, by the developer of that codec.


But as it seems to be different for different machines. The next thing to try is turning off any multi-threading (on both computers). That can cause weird randomizations when something goes wrong.

If that fails, then it either delegate library, or some OS/Processor specific fault, though that last is unlikely.


This has been posted on the bugs discussion.

[Tosyk]

thank you fmw42
posted here
Will post solution here if IM developers will help me