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 Sent: Sunday, November 15, 2020 8:22:01 PM To: Worcester Linux Users' Group General Discussion Cc: Dennis Payne 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.

I can confirm that imagemagick will do the trick. If you’re using python, and want to do it within your program I’d recommend using PIL. from PIL import Image # image.mode is where the color space currently in use is stored X = Image.open(path) X.convert(‘cmyk’) From: "Krichevsky, Nicholas J. via WLUG" Reply-To: Worcester Linux Users' Group General Discussion Date: Sunday, November 15, 2020 at 5:57 PM To: Worcester Linux Users' Group General Discussion Cc: Dennis Payne , "Krichevsky, Nicholas J." Subject: [EXT] [WLUG] Re: [EXT] CMYK jpeg Looks like you can do this with imagemagick http://www.imagemagick.org/discourse-server/viewtopic.php?t=13359https://nam03.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.imagemagick.org%2Fdiscourse-server%2Fviewtopic.php%3Ft%3D13359&data=04%7C01%7Crbkillea%40wpi.edu%7C2fc40036793f46c803b608d889d2ccba%7C589c76f5ca1541f9884b55ec15a0672a%7C0%7C0%7C637410886388833929%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&sdata=GJfC%2BvlQHjQ0to%2BYxce0VkAr525L1rPf6PZ%2BXZ7mWXo%3D&reserved=0 converting RGB JPEGS to CMYK - ImageMagickhttps://nam03.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.imagemagick.org%2Fdiscourse-server%2Fviewtopic.php%3Ft%3D13359&data=04%7C01%7Crbkillea%40wpi.edu%7C2fc40036793f46c803b608d889d2ccba%7C589c76f5ca1541f9884b55ec15a0672a%7C0%7C0%7C637410886388843925%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&sdata=Bu%2FK9yFtr0AIpVqOTJi83Oo0cLH5a7dMLEyQj9v4MIs%3D&reserved=0 I need to convert a large number of images for my sister's ecommerce shop. Her website automatically handles images provided they are in the CMYK version of JPEG, but not the RGB version, and provided the starting file size is less than 1MB. www.imagemagick.org ________________________________ From: Dennis Payne via WLUG Sent: Sunday, November 15, 2020 8:22 PM To: Worcester Linux Users' Group General Discussion Cc: Dennis Payne Subject: [EXT] [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://nam03.safelinks.protection.outlook.com/?url=https%3A%2F%2Fsocial.fre...https://nam03.safelinks.protection.outlook.com/?url=https%3A%2F%2Fsocial.freegamedev.net%2Fchannel%2Fdulsi&data=04%7C01%7Crbkillea%40wpi.edu%7C2fc40036793f46c803b608d889d2ccba%7C589c76f5ca1541f9884b55ec15a0672a%7C0%7C0%7C637410886388843925%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&sdata=z24U00oMPErj0aAIrFp2rGg7osP73f2BJWiARqPzqBw%3D&reserved=0 _______________________________________________ WLUG mailing list -- wlug@lists.wlug.org To unsubscribe send an email to wlug-leave@lists.wlug.org Create Account: https://nam03.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwlug.mailm...https://nam03.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwlug.mailman3.com%2Faccounts%2Fsignup%2F&data=04%7C01%7Crbkillea%40wpi.edu%7C2fc40036793f46c803b608d889d2ccba%7C589c76f5ca1541f9884b55ec15a0672a%7C0%7C0%7C637410886388853916%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&sdata=sQhLpyGHkqwf6wqrN17d7I7KapOrDlATHyhweb74F%2FA%3D&reserved=0 Change Settings: https://nam03.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwlug.mailm...https://nam03.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwlug.mailman3.com%2Fpostorius%2Flists%2Fwlug.lists.wlug.org%2F&data=04%7C01%7Crbkillea%40wpi.edu%7C2fc40036793f46c803b608d889d2ccba%7C589c76f5ca1541f9884b55ec15a0672a%7C0%7C0%7C637410886388863911%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&sdata=K7LW6BhRluHHfztCsVlH%2BUCGTMkdnzGC5maBNA3P0yk%3D&reserved=0 Web Forum/Archive: https://nam03.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwlug.mailm...https://nam03.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwlug.mailman3.com%2Fhyperkitty%2Flist%2Fwlug%40lists.wlug.org%2Fmessage%2FJH76OHL7TSHXR56T5RJFIYSUYYKV7CVT%2F&data=04%7C01%7Crbkillea%40wpi.edu%7C2fc40036793f46c803b608d889d2ccba%7C589c76f5ca1541f9884b55ec15a0672a%7C0%7C0%7C637410886388863911%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000&sdata=1Xx9lxyUlRKMJv3uU3zc0Vbb4jIJ6J26IbiEsii36Yk%3D&reserved=0