IE7 and color depth - DPChallenge Forums

Canon EF 70-200mm f/4.0L IS USM

12/14/2006 05:05:42 AM · #1

I think this is since I got IE7, but I am not sure.

But I have this problem where JPGs displayed in IE7 are really crude. I am sure this was not a problem before. I just tested it today, using various pictures I uploaded.

When I view it in IE7, it is clearly showing what I believe is called "JPG compression artifact" marks in the sky gradient, while if I download this picture and open it in any other program, it is a nice and smooth gradient. Is there something wrong with IE7, or is it a setting in IE7 I have to change?

I really thought something was wrong with the pictures I took until I realized it was only when viewed with IE7 that I had this problem ... it is not just my pics, but any other pics where there is a fine colour gradient.

Message edited by author 2006-12-14 05:24:19.

B74A

Canon EF 70-200mm f/4.0L IS USM

12/14/2006 05:11:11 AM · #2

Sorry to bother, but I just solved it myself :-)

I went to check the settings of my screen, and it was 16 bit. I changed it to 32 bit, and now pics in IE7 are fine (again!).

But WHY on Earth is it only IE7 that is affected by this - Picasa, Example view, PS, desktop background ... all of these would show in a correct way, just not IE7 ...

???

Bobster

Canon EOS-20D

Tamron SP AF 28-75mm f/2.8 XR Di for Canon

12/14/2006 10:16:35 AM · #3

nope, those other apps were using dithering to deceive you, IE7 was showing you the true picture :)

if your using 16bit colour the system will use dithering to try and make up a 24bit image..

Message edited by author 2006-12-14 10:17:08.

B74A

Canon EF 70-200mm f/4.0L IS USM

12/15/2006 03:52:44 AM · #4

Thanks, Bobster, that all makes sense! I think?

Anyway, it is fixed, don't know how I got it changed to 16 bit in the first place.

Nikon AF-S DX Zoom Nikkor 18-55mm f/3.5-5.6 ED

01/31/2007 11:10:49 AM · #5

I've just been having this same problem, on my new laptop the pics in DPC (including my own) look heavily compressed and then on my desktop they're fine. I put it down to IE7 but couldn't find any options to turn off what i thought was some JPG optimisation of something.

I will try the 32 bit option tonight, thanks :o)

Apple iPhone 5

01/31/2007 11:21:48 AM · #6

Originally posted by B74A:

Anyway, it is fixed, don't know how I got it changed to 16 bit in the first place.

Keep an eye on it. I find that sometimes mine reverts back to 16-bit. I think it's if I switch to 'presentation' mode on my laptop, or some games it switches it to 16-bit.

Message edited by author 2007-01-31 11:22:17.

01/31/2007 02:59:52 PM · #7

I've just checked and i am in 32bit mode on the display.

It only seems to be certain pictures that i see this problem with but it's consistent with the ones i have the issue with?

Any suggestions?

Thanks

Canon EF 100mm f/2.8 USM Macro

02/02/2007 07:56:57 AM · #8

it's this pic in particular:

I view it here at work or on my desktop at home (both IE6) and it's fine, but i look at it through IE7 on my laptop and the reflections all blocky and the frames have compression artifacts??!?

HELP!!

TechnoShroom

Canon EOS-30D

02/02/2007 11:09:07 AM · #9

Looks the same in Fx, Opera, and IE7. You said it's IE7 on your laptop. Is this a wireless connection? It's common for wireless broadband providers' software to compress images for faster loading. You might want to see if you have image compression settings the same for each browser.

Canon EF 100mm f/2.8 USM Macro

02/02/2007 11:50:34 AM · #10

thanks for the quick reply, do you mean browser settings?

Do you have any idea where this setting might be? I did check through for something of this nature originally

TechnoShroom

Canon EOS-30D

02/02/2007 11:54:32 AM · #11

Originally posted by kevip6:

thanks for the quick reply, do you mean browser settings?

Do you have any idea where this setting might be? I did check through for something of this nature originally

Not in the browser. For example Verizon wireless broadband uses Venturi for compression which has settings accessed through the VZAccess Manager.