I agree with rspahitz. The best way is to use a graphic manipulation program.
You can use MicrografX PP70 or Corel Photo House. Both have excellent functions that allows you to change resolution and/or compress images.
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Question
Decrease image resolution
Hello experts,
how can I decrease image resolution from 1200 dpi or 600 dpi to 72 dpi (for internet display)?
Can I do it in code or should I scan the pictures again? (big problem)
and for better understanding...
When I see in documentation the subject of image compression - Is is the same as (or relates to) image resolution?
I'll appreciate your help.
motile
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by: rspahitzPosted on 2001-05-04 at 10:37:28ID: 6051531
There are plenty of paint/photo programs that let you adjust the resolution of pictures. If you only have a few (up to 50) and you won't be getting a lot more at regular intervals, I'd recommend this route rather than try to write a VB program to handle it.
With the paint programs, you normally get lots of other good features like contrast and brightness control.
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As for the compression issue, this is merely a way that the same amount of information can be stored in a smaller file. A GIF file is really just a bitmap (BMP) image but shrunk down using some computer algorithms. When you go to display the GIF, another algorithm must decompress the file to display it.
If you had no issues with space, BMPs will probably be faster to display than other images because the system only has to transfer values from the file to the image control. For GIF, JPG, etc., the data must first be decompressed, then transferred....but this usually happens fast so people prefer these files which can by 90% smaller!