CMYK image and "gray" image

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Bakancsok
Newbie
Posts: 8
Joined: Tue Oct 01, 2019 10:25 am

CMYK image and "gray" image

Post by Bakancsok » Tue Jan 07, 2020 10:54 am

Hi!

How do I distinguish between the two images?

Simple:
https://we.tl/t-DFUpKGy1w9

:oops: :oops:
Attachments
sample.jpg
sample.jpg (118.11 KiB) Viewed 2368 times

bens
Member
Posts: 187
Joined: Thu Mar 03, 2011 10:13 am

Re: CMYK image and "gray" image

Post by bens » Tue Jan 07, 2020 12:04 pm

The action "Select by number of color plates" can help, if you turn colour management off. Unfortunately your "good" example does have some stray pixels that use more than just the K plate - very few, but enough to throw off the plate check. If possible I suggest you automatically fix these rather than trying to find them. The action "Select black and white objects" could help with that:

Select black and white objects
Convert color to gray
Override color management settings: color management OFF
Convert color to CMYK

Bakancsok
Newbie
Posts: 8
Joined: Tue Oct 01, 2019 10:25 am

Re: CMYK image and "gray" image

Post by Bakancsok » Tue Jan 07, 2020 12:22 pm

Hello!

I don't want to convert the picture, just find it.

I've included a better example.

https://we.tl/t-uQ1pl7QqIq
bens wrote:
Tue Jan 07, 2020 12:04 pm
The action "Select by number of color plates" can help, if you turn colour management off. Unfortunately your "good" example does have some stray pixels that use more than just the K plate - very few, but enough to throw off the plate check. If possible I suggest you automatically fix these rather than trying to find them. The action "Select black and white objects" could help with that:

Select black and white objects
Convert color to gray
Override color management settings: color management OFF
Convert color to CMYK

bens
Member
Posts: 187
Joined: Thu Mar 03, 2011 10:13 am

Re: CMYK image and "gray" image

Post by bens » Tue Jan 07, 2020 1:36 pm

That one works perfectly with "Select by number of color plates".

Select if number of color plates is more than 1
Log selection "BAD"
Select if number of color plates is equal to 1
Log selection "GOOD"

If you want to make sure you don't get objects with e.g. only Cyan you can combine it with the "Select black and white objects" action:

Select black and white objects
Select if number of color plates is more than 1
AND
Log selection "BAD"

Bakancsok
Newbie
Posts: 8
Joined: Tue Oct 01, 2019 10:25 am

Re: CMYK image and "gray" image

Post by Bakancsok » Wed Feb 05, 2020 9:23 am

Thank you, this was a good solution. :D

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