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jormartr
Joined: Nov 30, 2003
# Posts: 3
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Posted: 2003-Dec-01 03:41
Hi!, my question is not about WEB image. It is about losless compresion. I have a large collection of tif images, each one about 35-40 mb. I have now no disk space. What can I do? I do not want to compress in lossy format, now I use TIF with LZW compression, anyone can help me to reduce the size of the images?
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davaddavad
Joined: Aug 02, 2001
# Posts: 928
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Posted: 2003-Dec-01 04:26
If your using lzs then your are already compressing the file 50% with no loss in image quality. Other formats can reduce the file size further but are not lossless. Depending on the device to be viewed in depends on what quality is needed. Do you really need 35 meg file for your image? If you dont intend on enlarging the image then find the compression ration for jpeg that suits your needs. I dont know of any better inexpensive technology, there are some pay solutions) that could help unless you do it using I thing either pdf files or pdf image files. If I'm wrong someone please add in. hth dave
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jormartr
Joined: Nov 30, 2003
# Posts: 3
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Posted: 2003-Dec-01 12:51
What about PNG, does it compress better than TIF?
Are there better lossy formats than jpeg? Like jpeg2000 or anything else?
It is not important file compatibility, I want quality/size, but specially I am looking for the quality
[ Message was edited by: jormartr 12/01/2003 05:19 am ]
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jormartr
Joined: Nov 30, 2003
# Posts: 3
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Posted: 2003-Dec-02 00:56
Well, I have been playing with photoshop, and the best losless for the size is png. I use it for my photographies.
There is the settings under "image" / "mode" :
8 bits/channel
16 bits/channel
How do these afect to the quality? the size of the file is obviously 1/2, but is it a good idea to mantain 8 bits/channel ? I mean, if one image has 24bpp, has this "8/16 bits/channel" option something with the number of colors?
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