Photoshop settings? What have I forgotten in the setup?

[1ponders] (Paul) · #1 04-06-2011, 11:59 AM

After doing a completed windoze re-installation and all my astronomy software, there is one program that has me pulling the rest of my hair out.

Up until now I've not had a problem with CS3 reading Tiff files put out by DSS. Now when I open them in PS they appear terribly graduated. I know its in PS because the image I'm posting is an image processed prior to the re-installation looked fine prior to that.

This image has been processed to highlight the problem.

Any ideas?

Octane (Humayun) · #2 04-06-2011, 01:36 PM

Are you working in 16-bit mode?

H

[1ponders] (Paul) · #3 04-06-2011, 03:24 PM

Yes, saved as 32 in DDS and then converted to 16 in ps. The image doesn't change converting from 32 - 16

Octane (Humayun) · #4 04-06-2011, 04:54 PM

Are you working in Adobe RGB mode?

H

[1ponders] (Paul) · #5 04-06-2011, 11:45 PM

Yep been into Colour Settings. (attached)

I have occasionally gotten the same effect when opening a monochrome image before, but simply increasing the image size (magnifying) solved the problem. This doesn't want to seem to solve. I can still process the image and the gradient reduces considerably, except the fine detail looks like jpeg artifacts. All angular and pixellated.

Octane (Humayun) · #6 05-06-2011, 01:40 AM

I've had this before as well, many, many years ago.

I think I resolved it by updating my video card drivers.

H

[1ponders] (Paul) · #7 05-06-2011, 09:07 AM

I was starting to think it might be more a hardware issue. This poor old lappy is on its last legs.

CoolhandJo (Paul) · #8 05-06-2011, 09:39 AM

Could be a shift in the tonal range (white balance) on screen only. Try resetting the balance.

[1ponders] (Paul) · #9 05-06-2011, 09:55 AM

Quote:

Originally Posted by CoolhandJo

Could be a shift in the tonal range (white balance) on screen only. Try resetting the balance.

where would I find that?

OICURMT · #10 05-06-2011, 10:20 AM

Quote:

Originally Posted by [1ponders]

I was starting to think it might be more a hardware issue. This poor old lappy is on its last legs.

Question: The image you supplied was a saved image/processed one?

1) If so, then it is not a hardware issue, it is a software one. The software does not care what kind of hardware you have to view the image, it processed it based on the setting in the program itself. There is an exception to this rule with respect to some image processing products. PS can use the GPU to perform processing tasks. If the GPU is faulty, it could affect your images. That said, I'm not aware of PS using embedded GPU's on laptops. PS tends to use the high end desktop cards for GPU processing.

2) If not (i.e. a screen capture) then is *MAY* be a hardware issue, as print screen grabs the bit state from the video memory buffer and dumps it as a RGB sequence. If the memory is corrupt, faulty or otherwise compromised, then you can get artifacts in the image.

OIC!

[1ponders] (Paul) · #11 05-06-2011, 10:59 AM

thanks for the help guys.

Oic, I thought it might have been graphic issues as I noticed the other day when I started the laptop one of the windows screens that comes up (pale blue on) has a brighter area in the top left. That area showed a similar graduation to what I'm experiencing here. I'll have to have another check.

The image is a stacked image from DSS as a 16bit TIFF. The original fits files look fine in their parent program (Maxim)

[1ponders] (Paul) · #12 05-06-2011, 07:59 PM

Ok its either hardware or hardware settings. I've just processed a greyscale image on a different laptop and uploaded it. But when I view it on the uploaded site with the 'other' laptop its graduated like the original problem in ps.

Thank goodness for multiple laptop ownership

tlgerdes (Trevor) · #13 05-06-2011, 08:31 PM

That definately sounds like the graphics card is only using 8bit or 16 bit colour, rather than 32bit colour.

I just reset my graphics card to 16bit depth and I get graduations like yours on my screen. Changed it back to 32bit depth and returns to normal.