what's best format to keep image quality, but make it small

beauty9235 · Post by **beauty9235** » Thu May 30, 2013 7:04 am

each day, we will get different kinds of image formats, some customers are stupid, give the image so big, more than 100M, we plan to covert all images to a temp dir, to make it smaller and lighter, but keep high quality, and the path(some imagers exists paths). we try to find a resolution to sove the problem. Now there can be another generic solution: use a file format that is good at compressing and preserving the picture. In this case we don't give a low quality version we just give a smaller file. Can you give us some advice for do this?

you know all the images we don't change customers' path name, but maybe last format they ask us save as jpg or tif. but in the middle, we just want make the original file smaller, avoid affect it's quality and path,layers,channels....(some images have path or include layers),then we provide to our designers to download via FTP client, then do to some job.

Stitches · Post by **Stitches** » Thu May 30, 2013 7:08 am

If you're printing, you might try tiffs. They can include layers, additional color channels and can be compressed with zip.

You'll also need to figure out how high of dpi your output device benefits from. I suggest taking an image that comes to you at 300 or so dpi and resampling it to lower resolutions and printing them out for comparison. Then you'll know what you can reduce images down to, in general, to get the results you want.

beauty9235 · Post by **beauty9235** » Thu May 30, 2013 7:21 am

Thanks. Acturally, we don't know that it will use for print or not. I think some for print, some for website, and some prepared for AI and so on..
the problem, we just want to make it smaller, some tiff 150M, very big.