View Single Post
  #3 (permalink)  
Old 03-29-2008, 06:43 AM
r_fredrick_smith's Avatar
r_fredrick_smith r_fredrick_smith is offline
Critical Eye/Moderator

 
Join Date: Feb 2008
Location: DFW / Texas
Posts: 405
Thanks: 10
Thanked 109 Times in 77 Posts
r_fredrick_smith is on a distinguished road
Exclamation Re: Converting an image for posting – what am I doing wrong?

Quote:
Originally Posted by LarsB View Post
This should be so easy – I have got to be missing something obvious. I am starting with 300 or 600 ppi TIFFs. I use Image>Image Size… to resize to 72 ppi and set the long side to 600 pixels. Transfer the image to ImageReady. In the Optimize tab in the Optimize palette, I set Format to JPEG and Quality to Maximum. Then File>Save Optimized as … to save the file. Comparing the original TIFF with the new JPEG, the JPEG’s colors look very dull. What am I doing wrong?
You are making it way to hard. There are two factors at play.

1. Colorspace --- if the color space is Adobe RGB or some color space other than sRGB, then when you do a Save Optimized, you are going to get a color shift. So before saving, change the color space to sRGB.

2. Use File | Save for Web right in Photoshop and use its image resize tab to change the size of the image. If you want to use Image | Image size, then ignore the resolution, just change the pixel width as needed. So there is no reason to even open ImageReady.

Here is a shot showing the typical color shift problem:


Image on left is in Adobe RGB color space. Image on right is as saved using file | Save for web. You can see the color shift this causes. So in this example I should first change the color space on the left to sRGB and the photo will still look the same on the left, but then would look the same as it on the right (after save for web).

Cheers,
rfs
__________________
The map is not the territory!

Last edited by r_fredrick_smith; 03-29-2008 at 10:11 AM..
Reply With Quote
The Following 2 Users Say Thank You to r_fredrick_smith For This Useful Post:
JKlebPhoto (03-31-2008), LarsB (03-29-2008)