![]() ![]() It might decide to use one of the lossy JPEG algorithms. Specifically, most PDF creators give you very little (obvious) control over how an image is going to be imported. (To be fair, a TIFF is likely to also just be LZW-compressed.) Beyond that, it's straight raster images, potentially compressed with RLE, flate, or LZW. Notably, its only TIFF support is CCITT fax, which only really specifies 1-bit color depth. PDF is not a container format (unless you just mean that it can contain arbitrary contextless binary data, which it can, not that any PDF viewer will know what to do with it), and it can contain only a few different image formats (sort of it's really just image compression algorithms). JPG will do poorly with a screen shot of a dialog box: You'll get swimmy blobby (faint) JPG artifiacts around window edges and fonts, and a larger file in the end. It changes the image each time it compresses it, but preserves the overall general visual appearance of the image. That's why we have lossy algorithms like JPG. So you can't just datacompress the image, most data compression algorithms see that as purely random uncompressible data. Because a phototgraph never has two pixels next to each other that are exactly the same color. ![]() In fact, saving a screen shot as a raw BMP file and then zipping it probably produces the greatest file size savings.Īs soon as you start talking about a photograph, that's when things get fuzzy. Those can datacompress the "unchanging" areas without any data loss, essentially like "zipping" the raw image file. For those, you want a file format that will handle those sorts of things well: TIF, RLE, GIF, PNG. Yeah, you can't use a Windows Screen Shot as an estimator for image quality or disk space savings in file format comparisons.Ī screenshot is a special case: lots of large flat areas of the exact same pixel color. That means I can edit each page individually, but is there any way to concatenate them all back together as a single document when the edits are done? I don't relish trying to print 170 separate files on 85 double-sided pages. PNG file, and that saved the document as 170 separate files. However, none of these tools will allow me to see and edit any but the first of the 170 pages.Īm I overlooking something obvious here, or do I need different tools?Įdit: I tried saving the PDF file as a. I have only a few graphic editing tools at my disposal: MS Paint, Paint.Net, and Photoshop Elements. If I could edit each page as a graphic, I could improve the look enormously. The original document was about a 4th generation copy with pages mis-aligned (I straightened them with the scanner software) and lots of noise and lack of contrast. It is the TIF file I am most interested in. I saved it as a PDF file, then used Adobe Acrobat to save the PDF file as a Microsoft Word document (not too successfully, it saved a blank page between each "real" page but that could be fixed easily enough I guess) and also as a multi-page TIF file. ![]() I have scanned into my computer a 170 page document. ![]()
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