color space issues - DPChallenge Forums

Tamron AF 18-270mm F/3,5-6,3 Di II VC LD Aspherical [IF] macro for Canon

05/06/2014 12:11:37 AM · #1

Thanksfor that. I continue to have the problem. When I save for web, the side by side shows the image in two different colors. Whatdo I need to chande, and more importantly, WHERE??????

Nokia N900

05/05/2014 11:31:35 PM · #2

Originally posted by tanguera:

Nope. If I "save as" jpg, the only box available under color is "ICC Profile: ProPhoto RGB". The box above it - Use Proof Setup: working CMYK - is grayed out, and anyway, the wrong color space. If I save for web, thre is a "convert to sRGB: box, which is checked. Also, the embed color profile box is checked. When I save this way, and upload it, there does not seem to be an issue with the color on the print site. But I want to know it shifts color when I save as jpg....

You are saving to Kodak ProPboto RGB in the first case, rather than sRGB, which explains the difference you are seeing. sRGB is the standard Web colour space. Adobe RGB (not mentioned here) has a wider gamut, meaning that more colours can be represented in Adobe RGB than in sRGB, assuming the software knows hpw to do so (and the hardware has the ability-mpst sysyems will need to map the woder gamut to sRGB).

ProPhoto RGB is an even wider gamut than Adobe RGB. It is so large, that if you were to pick ten random colours it can represent, at least one of these would not be able to exist in reality.

Samsung Galaxy S22, S22+, S22 Ultra

02/22/2014 08:36:14 PM · #3

Originally posted by GeneralE:

Have you contacted customer support yet -- I didn't ssee that mentioned?

Yes, I had several email exchanges with them, and that's when they mentioned that they just converted the uploaded image from LAB to rgb. When I said I had not either worked nor saved in LAB, they asked for the jpg again and they reported back that it was in rgb, so no progress there.

Tib, it sounds related, if slightly different. I don't notice a reduction in color when I saved the image in jpg, only when I uploaded and went to checkout.

Regardless, I have a temporary workaround by going to another lab, but it would sure be nice to know why this is happening.

Tiberius

Panasonic Lumix G 14mm F2.5 ASPH

02/22/2014 08:15:57 PM · #4

Maybe unrelated but:

Just these couple of days I was noticing some issues. When in CS6 and save as jpg the image lost its colors. Yesterday I did changed the tiff I was editing to 8 bit before saving as and it worked.

Message edited by author 2014-02-22 20:17:33.

Canon 12x IS USM (S3 IS built-in Lens) -- 36-432mm (35mm EQ)

02/22/2014 07:45:07 PM · #5

Have you contacted customer support yet -- I didn't ssee that mentioned?

Canon EF 24-105mm f/4L IS II USM Lens

02/22/2014 07:37:42 PM · #6

Originally posted by hahn23:

White High Gloss vs. Sheer

This is who I ultimately ordered from, in the high gloss finish. But I was doing so from PIOC without any issues until now.

hahn23

Canon EOS-5D Mark IV

02/22/2014 06:48:32 PM · #7

White High Gloss vs. Sheer

02/22/2014 06:01:13 PM · #8

Nope, I've ordered metal prints from them before, and what I saw was what I got.

Canon 12x IS USM (S3 IS built-in Lens) -- 36-432mm (35mm EQ)

02/22/2014 05:31:53 PM · #9

Just for fun, go pretend to purchase the same image on glossy paper and see if you get the same shift -- it is possible they are previewing it as it will appear on the metal substrate -- you may need a printer profile calibrated for metal prints.

BTW: I have a common form of red/green color-blindness and cannot be relied upon to see some small color shifts. :-(

02/22/2014 05:24:30 PM · #10

Here is a screen grab of both the image as it appears on my computer (and on that site's uploaded page), and how it appears at checkout, after cropping.

Obviously, something is happening on their end between the cropping action and the checkout display.

Canon 12x IS USM (S3 IS built-in Lens) -- 36-432mm (35mm EQ)

02/22/2014 04:48:53 PM · #11

Originally posted by kirbic:

It would be very interesting to open both "Save for Web" and normally saved jpeg versions on a different machine, and see how Ps interprets the files.

Even better might be to open them with one or more browsers and any other image previewing software and see if they look different there, since you already know how they look in Photoshop.

kirbic

Canon EOS R5

Canon RF 24-70 f2.8 L IS

02/22/2014 04:32:13 PM · #12

Originally posted by tanguera:

The odd thing, Fritz, is that when I "save for web" the issue is resolved.

Well, that I think gives us an important clue... since saving for web strips a lot of "extraneous" information, it may be eliminating the source of the misinterpretation on the print lab's end.
It would be very interesting to open both "Save for Web" and normally saved jpeg versions on a different machine, and see how Ps interprets the files.

Canon 12x IS USM (S3 IS built-in Lens) -- 36-432mm (35mm EQ)

02/22/2014 04:28:17 PM · #13

I *think* if you "save for web" it either strips the profile or applies sRGB ...

02/22/2014 04:23:29 PM · #14

The odd thing, Fritz, is that when I "save for web" the issue is resolved. The site where the problem first appeared (PIOC), only accepts jpg format. I'm trying out Bay Photo now, and did not look into alternate formats, but will in the future.

Canon 12x IS USM (S3 IS built-in Lens) -- 36-432mm (35mm EQ)

02/22/2014 03:54:47 PM · #15

I don't know if it makes any difference, but some printers (e.g. Costco) are now accepting files in TIFF format.

kirbic

Canon EOS R5

Canon RF 24-70 f2.8 L IS

02/22/2014 03:52:12 PM · #16

If you are seeing Red, Green and Blue channels then you are certainly not working in LAB color mode. If you have explicitly converted to an RGB profile and saved, embedding the profile information (not assigning, but converting/embedding), then any remaining issues should only be ones of differing calibrations or of proofing settings. The fact that the print lab is telling you that your image is in LAB space leads me to believe that there is something wrong either in transmission or on their end.
You should look at ways to independently verify the saved file.

02/22/2014 03:35:27 PM · #17

Originally posted by GeneralE:

What profile does your printer expect?

This is all confusing because there's a difference between "assigning" a profile to an image, and "embedding" the profile, plus the issue of your "proofing" setup ... you probably need kirbic or scalvert to explain it all properly though ... :-(

I understand that printing is a whole other science, but I've never had this issue before. Nothing in the creation of the file has changed on my end, but the printed results suddenly have.

Canon 12x IS USM (S3 IS built-in Lens) -- 36-432mm (35mm EQ)

02/22/2014 02:10:16 PM · #18

kirbic or

scalvert to explain it all properly though ... :-(

02/22/2014 02:03:02 PM · #19

Originally posted by GeneralE:

He's trying to make sure you're not actually in Lab Mode, where you'd have three channels, labelled Lightness, a and b ...

Nope, it shows RGB, Red, Green, and Blue
And as I said before, under "Mode", it's RGB

Canon 12x IS USM (S3 IS built-in Lens) -- 36-432mm (35mm EQ)

02/22/2014 01:56:04 PM · #20

He's trying to make sure you're not actually in Lab Mode, where you'd have three channels, labelled Lightness, a and b ...

02/22/2014 01:49:52 PM · #21

Originally posted by kirbic:

Two questions:
1.) When you have the file open, look under Image>Mode. What's checked?
2.) Look at your channels panel (center tab at the top of where the Layers panel is located). What channels arelisted?

I'm not at that computer right now, but I recall the mode was 16-bit. I changed it to 8-bit. No difference. Under channels, all the channels were listed.

Canon 12x IS USM (S3 IS built-in Lens) -- 36-432mm (35mm EQ)

02/22/2014 01:03:13 PM · #22

Originally posted by kirbic:

Hah, I was waiting for you to show up! :-)

kirbic

Canon EOS R5

Canon RF 24-70 f2.8 L IS

02/22/2014 01:00:43 PM · #23