Legacy ImageMagick Discussions Archive

Oh!

Now I understand the logic behind [fx:] and [pixel:] - thanks!

As I am currently working on it, I have a question about the -format option.
According to the documentation, I can output a specific pixel's color channel by using, for example
-format "%[pixel:p{x,y}.c]
to get that pixel's cyan value, m for magenta and so on.
But I am wondering, why my output ...

Oh, indeed, with your explenation of the edit it makes a lot more sense.
I figured you're iterating through the var set by windows but I just had not understood what exactly the -evaluate and -channel parts do, but now it makes a lot of sense.

I'll have to experiment around a bit with the output ...

Thank you for the very quick answer snibgo,

could you explain to me what the command does, step by step? I tried to interpret it while reading the cli options on the IM website but I don't quite get my head around it 100%.
I mean only the parts "-channel b -evaluate set %%z +channel".

Thank you ...

Hello everybody,

I have a question regarding the performance of ImageMagick.
The system (a VPS from Amazon Web Services) I am running (the latest) ImageMagick on is: 1 Xeon E5-2650 CPU, 615MB Ram

I have created a batch file, which runs this command:
FOR /l %%x IN (0, 1, 255) DO FOR /l %%y IN (0, 1 ...

Cool.
I will simply work with the swapped values meantime.

Thanks for the great help

Could there be a bug with the variables used inside an -fx function?
If I use this format notation:
-format '%[fx:int(100*c)], %[fx:int(100*m)], %[fx:int(100*y)], %[fx:int(100*k)]'
the results are for example this:
RGB(0,255,255) -> "80, 24, 0, 0"
RGB(255,0,0) -> "0, 82, 90, 0"
RGB(255,0,255 ...

You guys are amazing, thanks a ton.
I'll have to give this a try immediately when I get the chance

Hi again - sorry to rewake this post, but I'd have another question, if anyone could assist me.
Is it possible to use the -write command in conjunction with the -format command, to store only the cmyk color values in a txt file, and then repeatedly adding new values to the same file?

If at all ...

Hello again and thanks for the suggestions.

I've gone your way, snibgo, and used a single convert command without saving intermediate files.
This is what I'm currently doing:

exec("convert xc:'rgb(0,255,255)' -profile AdobeRGB1998.icc -profile CoatedFOGRA39.icc -write txt:cmyk.txt -profile ...

I would not need the files, no.
I've tried what you suggested and used this:

$img_cmyk = exec("convert xc:'rgb(0,255,255)' -profile AdobeRGB1998.icc -profile CoatedFOGRA39.icc info:- ");
Echoing the variable gives me this:
xc:rgb(0,255,255) XC 1x1 1x1+0+0 16-bit ColorSeparation DirectClass 7 ...

Hello snibgo,

thanks a lot for your reply.
I thought of a similar process already, but the one thing that keeps me back is the workload necessary for this procedure.
Currently I am extracting the color values in this way:

1) create the 1x1 image with the respective color profiles
exec("convert xc ...

Hi everybody,

I've been working with Imagemagick for a while now (using it in a web project, thus using PHP to work with it), and I've ran into a problem. I hope a smart mind here can help me.

I have to implement a color picker in my project (again, web based), which is no hassle at all. Done that ...