tiff size change - help - Digital Darkroom Forum

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Q. tiff size change - help

Asked by peter adison (K=160) on 1/31/2005

Hi, I am asking your help with a problem wich seem to be simple at a first look: I want to change the size of a tiff file, but without changing the dimensions of the image itself, and without converting the image into any compressed file format as jpg, gif, etc.

So let`s take the practical situation: I have a tiff image file of 20 Mb (megabytes). The dimension of this image is: 3000 x 2000 pixels.
I want to change this 20 Mb tiff image file into a 10 Mb tiff image file at the same dimensions: 3000 x 2000 pixels, but without converting it to file formats that could compress the image like jpg, loosing quality. Is allowed only converting in BMP or other formats wich doesn`t compress the data of the file.

Is anyone of you who have an ideea to solve this problem? Or this is impossible.
Please help me.

thank you in advance,

Adison.

Diabo (K=2080) - Comment Date 1/31/2005

TIFs can be compressed in many ways. LZW is a lossless compression method. But don't expect it to cut 10 Mb from a 20 Mb file.

michaelle . (K=3807) - Comment Date 2/2/2005

I could be wrong, but unless you are using the lossless compression afforded you with tiff files (which will still not cut it down to 10mb), anything else you use to get to 10mb would mean having to "lose" data. Depending upon what this is for, converting to a JPEG at the highest setting may provide you an image at the size you are looking for without noticible loss. Others might have better suggestions.

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