Take the 2-minute tour ×
Super User is a question and answer site for computer enthusiasts and power users. It's 100% free, no registration required.

This is driving me absolutely mad.

I save for web at 100%. I open back up. I save again at 100%. It is bigger than the last time. It keeps doing this over and over and over it could be infinite filesize but still only exact same quality image.

What I need to do is make one sigle aspect of the image 100% resolution (my logo) but make the rest and NOT my logo a smaller filesize. What SHOULD work, is to save WITHOUT the logo, and decrease, say 70%. Then open back up the SMALLER image, add the logo and move back to 100% quality and should be SMALLER THAN THE FIRST IMAGE.

EXAMPLE:

1000KB image (1010KB with logo)

save without logo at 70% Open the now 700KB image in photoshop.

Add 10KB logo, save at 100%

IMAGE IS NOW 1310KB!!

BUT THE FIRST TIME IT WAS ONLY 1010 KB WITH LOGO AT 100% QUALITY!!

What it SHOULD be is:

710KB

Do you get it? THIS MAKES NO SENSE! I HAVE WASTED 5 HOURS ON THIS SH*T!!

WHAT THE HELL??

feel free to edit this question to remove my emotional frustration. Right now I can't think clearly I am so mad right now.

share|improve this question
add comment

2 Answers 2

up vote 1 down vote accepted

To understand this , you need to learn a little on compression:

When you save a file at 70%, you did a little compression. When you open the file, the file is decompress.

When you re-save at 100%, you save it in his uncompressed form.

Even uncompressed, the file size can't be calculated like that. Merge it two files for 50 Kb won't necessary equals 100Kb.

And Jpeg is already a compress file. So two images of the same size (like 1024x768) won't be the same size.

share|improve this answer
    
okay. I see. I thought it was Reducing Quality, not just compressing. –  techaddict Mar 10 '12 at 14:26
add comment

I don't have photoshop infront of me right now, but this tutorial on variable quality may be helpful: http://etutorials.org/Adobe/How+to+use+Photoshop+7/Part+4.+Converting+Files/Task+8+How+to+Optimize+Files+with+Variable+Compression/

Also, Fireworks is said to be good at that, but I don't know exactly how to use it. Maybe not the best help, but good luck!

share|improve this answer
add comment

Your Answer

 
discard

By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.