CMYK jpeg

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WLUG meeting November 19th, 2020:...

Dennis Payne

Nov. 16, 2020

1:22 a.m.

Anybody know of an easy tool to convert an image into a CMYK color space jpeg? I found an online site that works but would like to do it on my machine. Searching has only found how to do it for tiff files. -- Dennis Payne dulsi@identicalsoftware.com https://social.freegamedev.net/channel/dulsi

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Logan Brown

Nov. 16, 2020

1:33 a.m.

CMYK encoded jpegs are technically within spec ( https://www.itu.int/rec/T-REC-T.872-201206-I/en) but are exceedingly uncommon and support is pretty sporatic. Typically a JPEG contains RGB data encoded as YCbCr. If your application strictly requires CMYK data, you probably want to consider another file format. Logan ________________________________ From: Dennis Payne via WLUG <wlug@lists.wlug.org> Sent: Sunday, November 15, 2020 8:22:01 PM To: Worcester Linux Users' Group General Discussion <wlug@lists.wlug.org> Cc: Dennis Payne <dulsi@identicalsoftware.com> Subject: [WLUG] CMYK jpeg Anybody know of an easy tool to convert an image into a CMYK color space jpeg? I found an online site that works but would like to do it on my machine. Searching has only found how to do it for tiff files. -- Dennis Payne dulsi@identicalsoftware.com https://social.freegamedev.net/channel/dulsi _______________________________________________ WLUG mailing list -- wlug@lists.wlug.org To unsubscribe send an email to wlug-leave@lists.wlug.org Create Account: https://wlug.mailman3.com/accounts/signup/ Change Settings: https://wlug.mailman3.com/postorius/lists/wlug.lists.wlug.org/ Web Forum/Archive: https://wlug.mailman3.com/hyperkitty/list/wlug@lists.wlug.org/message/JH76OH...

Dennis Payne

2:49 p.m.

Printing services generally want CMYK. Nothing I can do about that. I'm looking at using drivethrucards.com to print some cards. They have a beta service which takes CMYK jpeg that I thought I would use. If that doesn't work I could use Scribus. I loaded it but I decided not to try when it loaded a dialog at an insane size for some reason. (It had to be at least 4 times the width of my screen.) I'll give the imagemagik suggestion a try when I get a chance. If anyone wants to see a prototype card: https://social.freegamedev.net/photos/dulsi/image/6b4a87c2-eb26-4e0a-af26-e6... The text has been slightly altered since then and the pentagon around the 12 was cleaned up. On Mon, 2020-11-16 at 01:33 +0000, Logan Brown wrote:

...

CMYK encoded jpegs are technically within spec ( https://www.itu.int/rec/T-REC-T.872-201206-I/en) but are exceedingly uncommon and support is pretty sporatic. Typically a JPEG contains RGB data encoded as YCbCr. If your application strictly requires CMYK data, you probably want to consider another file format.

Logan From: Dennis Payne via WLUG <wlug@lists.wlug.org> Sent: Sunday, November 15, 2020 8:22:01 PM To: Worcester Linux Users' Group General Discussion <wlug@lists.wlug.org> Cc: Dennis Payne <dulsi@identicalsoftware.com> Subject: [WLUG] CMYK jpeg Anybody know of an easy tool to convert an image into a CMYK color space jpeg? I found an online site that works but would like to do it on my machine. Searching has only found how to do it for tiff files.