jpeg format

F
Posted By
fulgar
Nov 3, 2005
Views
289
Replies
6
Status
Closed
Hi,

I’ve got a problem with photoshop when I convert a file in the GIF or jpeg format, the result looks like a crap. Someone Have an Idea ? Or could you give me a web site it is well explained how we can use the conversion with photopshop;
Thanks for you help
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BH
Bill Hilton
Nov 3, 2005
I’ve got a problem with photoshop when I convert a file in the GIF or jpeg format, the result looks like a crap. Someone Have an Idea ?

Are you doing File > Save for Web? If so you should be able to see the differences between different quality settings in the window and adjust the settings to get what you want. jpegs should be no problem unless you have a requirement for a very small file size, just change the ‘quality’ setting until it looks good (try the ‘2-up’ display to see before/after).

Gifs can be more of a problem if you have a lot of colors or shades and are using too few colors for the conversion (you can select to use between 2 and 256 colors for gifs). For this reason gifs are not as suitable as jpegs for some image types, like photos for example.
CC
Cockpit Colin
Nov 4, 2005
I’m unclear about which way you’re converting. Are you trying to save an image as a GIF or JPEG, or are you trying to open a GIF or JPEG and save it as something else?

Cheers,

CC
F
fulgar
Nov 4, 2005
I had a scanned file opened in Photoshop and I wanted to save it as a jpeg and it looked like a crap.
I’ve tried save for the web and it looks a lot better .

What I did Cockpit it’s saved as and I choosed jpzg format but the result was not good.

Could you explained to me why there’s a huge difference between the 2 methods ?

"Cockpit Colin" a
T
TheDarkTrumpet
Nov 4, 2005
When you save as JPEG, for example, you are given a box that asks you how lossy you want the document. If you select a quality setting of 1, for example, the picture will look pretty bad. Pictures range from range 1 to 12. The higher the number, the better the quality. Note the higher the number also the more space it will take up.
BH
Bill Hilton
Nov 4, 2005
I’ve tried save for the web and it looks a lot better .
What I did Cockpit it’s saved as and I choosed jpzg format but the result was not good.
Could you explained to me why there’s a huge difference between the 2 methods ?

No doubt you used a higher ‘quality’ setting with ‘save for web’ … with jpeg conversions you can trade off file size for quality.
T
Tacit
Nov 5, 2005
In article <436b3476$0$26643$>,
"fulgar" wrote:

I had a scanned file opened in Photoshop and I wanted to save it as a jpeg and it looked like a crap.

Yes, this is correct.

JPEG is "lossy" compression. It degrades the quality of an image, permanently and irrevocably, in order to make the file smaller on disk. It was created for situations where file size is important and image quality is not important.

You can choose how much you want the image to be degraded. Less degradation and higher quality means bigger files.

The JPEG degradation is cumulative. If you open a JPEG and re-save it, you will degrade it more. Open and save it again, you will degrade it still more. It is important when you work with JPEGs that you keep an original copy of the image in some other format, and you do not edit and re-save a JPEG.

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