Legacy ImageMagick Discussions Archive

Hi snibgo,
I don't know if you want to assign a profile, or convert an image to a profile.

Maybe my question is causing confusion due to me not understanding what its is all about. Please bear with me. I have created an image with the gimp and the printer company have said that they want it as ...

I get similar results to windows 7 when I try in Ubuntu. I did a bit of research and it suggests that virtually all browsers use colour management. http://petapixel.com/2012/06/25/is-your ... r-managed/

I think I'll just have to give up on this issue. Thanks for all your help.

Hi,
I've uploaded everything to here...
https://skydrive.live.com/redir?resid=9F8DE44BC9AC7FD6!122&authkey=!AK_UJ7ww5u9mV7s

temp11.jpg - the original
temp11-im.jpg - converted to CMYK using the above command
temp11-online.jpg - converted to CMYK using online tool: http://www.rgb2cmyk.org/
ISOcoated ...

Thanks very much.
One thing though, when I view this converted image, it doesnt display any different to the original (when I have converted to CMYK using an online tool the images visibly changes - it becomes darker due to the reduced color range in CMYK).

Can you confirm that the above command ...

C:\Program Files (x86)\ImageMagick-6.8.6-Q16>identify -verbose temp11.jpg
Image: temp11.jpg
Format: JPEG (Joint Photographic Experts Group JFIF format)
Class: DirectClass
Geometry: 388x180+0+0
Resolution: 150x150
Print size: 2.58667x1.2
Units: PixelsPerInch
Type: TrueColor
Endianess ...

Hi, I am trying to convert an image to a different color profile for the printers. I have read up how to do this here...
http://www.imagemagick.org/script/color-management.php and here...
http://www.imagemagick.org/script/command-line-options.php#profile
and have become hopelessly confused.

Could ...

Thanks very much.
I guess that the manual has been written for linux users, and for windows we have to double up the percent signs.

I have a 2304 x 3584px image that I want to split up into 126 256x256 tiles.
I figured out how to do this...

convert -crop 256x256 t2_gmd_z8.bmp out2\tile.png

...but I cant figure out how to incorporate the x & y coordinate in the file name.

The big image's top left corner is google coords (121 ...

Thanks glenrp, that worked perfectly.

FYI, the bit in the manual I was referring to ...
http://www.imagemagick.org/Usage/formats/#png_formats
it says: "PNG8 was defined by PhotoShop, not the PNG group. And while it can handle multiple semi-transparent colors, as well as a fully-transparent color ...

Hi, I have some png files, they dont have many colors in them so they are candidates for file size reduction by converting to palette PNGs. I.e. can ImageMagick read in a PNG, quantise it by analysing it to work out the best set of 16 colors (RGB and alpha) to represent it and then saving it as a 4 ...

Works for me now.

Thanks, modifying the savePng.scm worked for me

Also, FYI, I tried your command line version. I assumed the command shows you converting 2 XCF files, so I deleted tests.xcf and deleted one p.png but it gave this error...

E:\>"C:\Program Files\GIMP 2\bin\gimp-console-2.8.exe" -i -b "(let
* ((image ...

Thanks snibgo. That mostly worked. However it is not converting images exactly like the GIMP does . It seems to be creating an image that is the size of the extents of the largest layer rather than clipping everything to the size of the image.

Thanks snibgo. That makes sense. I will peruse the GIMP command line method. Its just a pity that IM documentation is not a bit clearer about it not really supporting .XCF. (Could have saved us some time).

Thanks @fmw42, but I cant rely on the layer that I want being the top one as I have to deal with arbitary .xcf images which could have many layers, some hidden and some not. I am on GIMP 2.8 which may be why you cant open my file.