Question Terrible color of Pentax Forums uploads

Imp · 01-30-2016, 09:07 AM

I've posted this before... but never got a good response. Whenever I uplaod a picture to Pentax Forums, the color is always messed up and awful. It looks fine when I embed from flickr, it looks fine on flickr and 500px... And i've resized the image to fit Pentax Forums image sizes, but the image still looks like rubbish.

Here is an example. This is the flickr embed: and attached is the Pentax Forums upload

Help Help!!

Attached Images

View Picture EXIF

Last edited by Unregistered User 8; 02-01-2018 at 03:40 AM. Reason: Remove swearing

Imp · 01-30-2016, 09:10 AM

Originally posted by Imp

I've posted this before... but never got a good response. Whenever I uplaod a picture to Pentax Forums, the color is always messed up and awful. It looks fine when I embed from flickr, it looks fine on flickr and 500px... And i've resized the image to fit Pentax Forums image sizes, but the image still looks like rubbish.

Here is an example. This is the flickr embed: and attached is the Pentax Forums upload

Help Help!!

Here is another upload, this time the same size image as the flickr embed

---------- Post added 01-30-16 at 11:11 AM ----------

Huh... now that looks better???

---------- Post added 01-30-16 at 11:15 AM ----------

Now it looks fine here... but when I edited the picture I submitted in the photo contest, to replace it with the one I just showed above... it still looks bad

**csa** · 01-30-2016, 09:17 AM

I've not had any problems with color shift when posting any of my images.

Imp · 01-30-2016, 09:29 AM

It seems to be the previous of all the pictures in the contest are color-shifted - when I click on the picture and it opens the whole picture in a new tab, the colors look good. Adam, what's up??!!

Adam · 01-30-2016, 11:42 AM - **1 Like**

If you upload a file larger than the size limit, our system will scale it, but compression will be applied.

That can degrade the image quality slightly, though I don't believe it's the culprit here. My guess is that you're not using sRBG, which I believe will result in a color shift when our system goes to scale/compress files.

Easiest solution: always upload below the max. width/height limit, or use sRBG/"save for web" for all your web photos.

Imp · 01-30-2016, 12:27 PM

Originally posted by Adam

If you upload a file larger than the size limit, our system will scale it, but compression will be applied. That can degrade the image quality slightly, though I don't believe it's the culprit here. My guess is that you're not using sRBG, which I believe will result in a color shift when our system goes to scale/compress files. Easiest solution: always upload below the max. width/height limit, or use sRBG/"save for web" for all your web photos.

saved as SRGB, a lot better!

Adam · 01-30-2016, 02:37 PM

Perfect!

Adam
PentaxForums.com Webmaster (Site Usage Guide | Site Help | My Photography)

PentaxForums.com server and development costs are user-supported. You can help cover these costs by donating or purchasing one of our Pentax eBooks. Or, buy your photo gear from our affiliates, Adorama, B&H Photo, KEH, or Topaz Labs, and get FREE Marketplace access - click here to see how! Trusted Pentax retailers:

**goatsNdonkey** · 02-04-2016, 04:15 PM

Some good advice in the replies here, though I had only noticed some images I posted looking a bit darker on the forum than they do viewed directly on my screen or on the host site I upload them to --darker, but without noticeable color shift.

Rupert · 02-05-2016, 07:04 AM - **2 Likes**

No problem here...my squirrels always look handsome when posted at PForums.....Always!

Color is not significant if you are as handsome as Otis! Maybe more shooters should shoot...more squirrels?

Regards!

wissink · 02-19-2016, 12:09 PM

Itd be handy if someone created a LR plugin for the forums...

Adam · 02-19-2016, 12:31 PM

Originally posted by wissink

Itd be handy if someone created a LR plugin for the forums...

We don't modify uploads, so as long as they are saved in srbg and not overly big, they should look just like on your screen

wissink · 02-25-2016, 07:22 AM

Originally posted by Adam

We don't modify uploads, so as long as they are saved in srbg and not overly big, they should look just like on your screen

Oh thats good. It would be convenient though

.

**JensE** · 12-09-2017, 06:13 PM

I'm picking up this old thread here as I'm struggling with all my pictures getting transformed (to incorrect color ...), despite fitting into the size constraints and using sRGB.

Originally posted by Adam

We don't modify uploads, so as long as they are saved in srbg and not overly big, they should look just like on your screen

Unfortunately not - at least the interpretation of 'sRGB' seems to be narrow. Rawtherapee ships with the sRGB profiles documented on Color Management - RawPedia, which work fine e.g. when opening the files in browsers (Chrome, Firefox) locally.
Neither using 'sRGB_RT', nor the setting to not embed a profile - which should assume sRGB - seems to be accepted by the forum software as being 'sRGB'. My pictures are transformed (inflated from e.g. 120kB to ~280kb) and the colors are not matching at all, irrespective if a profile is embedded or not. I find this strange, because I would expect the sRGB definitions to roughly match at least, but the output is significantly more saturated.

So what's the recommendation here? Is the profile recognized by name? Which one exactly? Why isn't an empty profile considered sRGB?

Adam · 12-09-2017, 08:09 PM

Originally posted by JensE

I'm picking up this old thread here as I'm struggling with all my pictures getting transformed (to incorrect color ...), despite fitting into the size constraints and using sRGB.

Unfortunately not - at least the interpretation of 'sRGB' seems to be narrow. Rawtherapee ships with the sRGB profiles documented on Color Management - RawPedia, which work fine e.g. when opening the files in browsers (Chrome, Firefox) locally.
Neither using 'sRGB_RT', nor the setting to not embed a profile - which should assume sRGB - seems to be accepted by the forum software as being 'sRGB'. My pictures are transformed (inflated from e.g. 120kB to ~280kb) and the colors are not matching at all, irrespective if a profile is embedded or not. I find this strange, because I would expect the sRGB definitions to roughly match at least, but the output is significantly more saturated.

So what's the recommendation here? Is the profile recognized by name? Which one exactly? Why isn't an empty profile considered sRGB?

The file shouldn't be touched if it's within limits. Can you upload the file in question to our gallery or google drive so I can take a look?

**JensE** · 12-10-2017, 01:58 AM

Originally posted by Adam

Can you upload the file in question to our gallery or google drive so I can take a look?

Thanks for looking into it, I sent you a link via personal message.

01-30-2016, 11:42 AM - 1 Like	#5
Adam Administrator Site Webmaster Join Date: Sep 2006 Location: Arizona Photos: Gallery \| Albums Posts: 51,594	If you upload a file larger than the size limit, our system will scale it, but compression will be applied. That can degrade the image quality slightly, though I don't believe it's the culprit here. My guess is that you're not using sRBG, which I believe will result in a color shift when our system goes to scale/compress files. Easiest solution: always upload below the max. width/height limit, or use sRBG/"save for web" for all your web photos. Adam PentaxForums.com Webmaster (Site Usage Guide \| Site Help \| My Photography) PentaxForums.com server and development costs are user-supported. You can help cover these costs by donating or purchasing one of our Pentax eBooks. Or, buy your photo gear from our affiliates, Adorama, B&H Photo, KEH, or Topaz Labs, and get FREE Marketplace access - click here to see how! Trusted Pentax retailers:

02-19-2016, 12:31 PM	#11
Adam Administrator Site Webmaster Join Date: Sep 2006 Location: Arizona Photos: Gallery \| Albums Posts: 51,594	Originally posted by wissink Itd be handy if someone created a LR plugin for the forums... We don't modify uploads, so as long as they are saved in srbg and not overly big, they should look just like on your screen Adam PentaxForums.com Webmaster (Site Usage Guide \| Site Help \| My Photography) PentaxForums.com server and development costs are user-supported. You can help cover these costs by donating or purchasing one of our Pentax eBooks. Or, buy your photo gear from our affiliates, Adorama, B&H Photo, KEH, or Topaz Labs, and get FREE Marketplace access - click here to see how! Trusted Pentax retailers:

12-09-2017, 06:13 PM	#13
JensE Site Supporter Join Date: Dec 2015 Location: Leipzig Photos: Gallery \| Albums Posts: 1,969	Rawtherapee output always gets transformed I'm picking up this old thread here as I'm struggling with all my pictures getting transformed (to incorrect color ...), despite fitting into the size constraints and using sRGB. Originally posted by Adam We don't modify uploads, so as long as they are saved in srbg and not overly big, they should look just like on your screen Unfortunately not - at least the interpretation of 'sRGB' seems to be narrow. Rawtherapee ships with the sRGB profiles documented on Color Management - RawPedia, which work fine e.g. when opening the files in browsers (Chrome, Firefox) locally. Neither using 'sRGB_RT', nor the setting to not embed a profile - which should assume sRGB - seems to be accepted by the forum software as being 'sRGB'. My pictures are transformed (inflated from e.g. 120kB to ~280kb) and the colors are not matching at all, irrespective if a profile is embedded or not. I find this strange, because I would expect the sRGB definitions to roughly match at least, but the output is significantly more saturated. So what's the recommendation here? Is the profile recognized by name? Which one exactly? Why isn't an empty profile considered sRGB?

12-09-2017, 08:09 PM	#14
Adam Administrator Site Webmaster Join Date: Sep 2006 Location: Arizona Photos: Gallery \| Albums Posts: 51,594	Originally posted by JensE I'm picking up this old thread here as I'm struggling with all my pictures getting transformed (to incorrect color ...), despite fitting into the size constraints and using sRGB. Unfortunately not - at least the interpretation of 'sRGB' seems to be narrow. Rawtherapee ships with the sRGB profiles documented on Color Management - RawPedia, which work fine e.g. when opening the files in browsers (Chrome, Firefox) locally. Neither using 'sRGB_RT', nor the setting to not embed a profile - which should assume sRGB - seems to be accepted by the forum software as being 'sRGB'. My pictures are transformed (inflated from e.g. 120kB to ~280kb) and the colors are not matching at all, irrespective if a profile is embedded or not. I find this strange, because I would expect the sRGB definitions to roughly match at least, but the output is significantly more saturated. So what's the recommendation here? Is the profile recognized by name? Which one exactly? Why isn't an empty profile considered sRGB? The file shouldn't be touched if it's within limits. Can you upload the file in question to our gallery or google drive so I can take a look? Adam PentaxForums.com Webmaster (Site Usage Guide \| Site Help \| My Photography) PentaxForums.com server and development costs are user-supported. You can help cover these costs by donating or purchasing one of our Pentax eBooks. Or, buy your photo gear from our affiliates, Adorama, B&H Photo, KEH, or Topaz Labs, and get FREE Marketplace access - click here to see how! Trusted Pentax retailers:

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Canon equivalent of Pentax Forums?	tele_pathic	Photographic Industry and Professionals	3	04-15-2014 04:16 PM
Project 52 PROJECT 52-6-1-Color : A riot of color - WINNERS	Papa Lazarou	Weekly Photo Challenges	7	02-24-2014 12:49 PM
Project 52 PROJECT 52-6-1-Color - A riot of color	noelcmn	Weekly Photo Challenges	15	02-24-2014 05:37 AM
Suggestion The Best of Pentax Forums	hman	Site Suggestions and Help	7	09-13-2012 11:35 AM
New K200D - terrible color	JN99	Pentax DSLR Discussion	61	07-31-2008 07:01 AM

01-30-2016, 09:17 AM	#3
csa Loyal Site Supporter Join Date: Aug 2014 Location: Montana mountains Posts: 10,133	I've not had any problems with color shift when posting any of my images.

01-30-2016, 09:29 AM	#4
Imp Pentaxian Join Date: Nov 2014 Location: Washington, DC Photos: Gallery \| Albums Posts: 1,749 Original Poster	It seems to be the previous of all the pictures in the contest are color-shifted - when I click on the picture and it opens the whole picture in a new tab, the colors look good. Adam, what's up??!!

01-30-2016, 12:27 PM	#6
Imp Pentaxian Join Date: Nov 2014 Location: Washington, DC Photos: Gallery \| Albums Posts: 1,749 Original Poster	Originally posted by Adam If you upload a file larger than the size limit, our system will scale it, but compression will be applied. That can degrade the image quality slightly, though I don't believe it's the culprit here. My guess is that you're not using sRBG, which I believe will result in a color shift when our system goes to scale/compress files. Easiest solution: always upload below the max. width/height limit, or use sRBG/"save for web" for all your web photos. saved as SRGB, a lot better!

01-30-2016, 02:37 PM	#7
Adam Administrator Site Webmaster Join Date: Sep 2006 Location: Arizona Photos: Gallery \| Albums Posts: 51,594	Perfect! Adam PentaxForums.com Webmaster (Site Usage Guide \| Site Help \| My Photography) PentaxForums.com server and development costs are user-supported. You can help cover these costs by donating or purchasing one of our Pentax eBooks. Or, buy your photo gear from our affiliates, Adorama, B&H Photo, KEH, or Topaz Labs, and get FREE Marketplace access - click here to see how! Trusted Pentax retailers:

02-04-2016, 04:15 PM	#8
goatsNdonkey Site Supporter Join Date: Jan 2016 Location: Fulton County, Illinois Posts: 3,727	Some good advice in the replies here, though I had only noticed some images I posted looking a bit darker on the forum than they do viewed directly on my screen or on the host site I upload them to --darker, but without noticeable color shift.

02-05-2016, 07:04 AM - 2 Likes	#9
Rupert Veteran Member Join Date: Sep 2006 Location: Texas Photos: Gallery \| Albums Posts: 25,123	No problem here...my squirrels always look handsome when posted at PForums.....Always! Color is not significant if you are as handsome as Otis! Maybe more shooters should shoot...more squirrels? Regards!

02-19-2016, 12:09 PM	#10
wissink Veteran Member Join Date: May 2014 Location: S-ON Photos: Gallery Posts: 609	Itd be handy if someone created a LR plugin for the forums...

02-25-2016, 07:22 AM	#12
wissink Veteran Member Join Date: May 2014 Location: S-ON Photos: Gallery Posts: 609	Originally posted by Adam We don't modify uploads, so as long as they are saved in srbg and not overly big, they should look just like on your screen Oh thats good. It would be convenient though .

12-10-2017, 01:58 AM	#15
JensE Site Supporter Join Date: Dec 2015 Location: Leipzig Photos: Gallery \| Albums Posts: 1,969	Originally posted by Adam Can you upload the file in question to our gallery or google drive so I can take a look? Thanks for looking into it, I sent you a link via personal message.

Thread Tools	Search this Thread
	Search this Thread: Advanced Search