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previous: paul perry My vote is with Frank Clarke. I've ... -- 9/3/2000 7:57 AM view thread

Re: PDF format for layouts

9/4/2000 4:04 AM
Steve A.
Re: PDF format for layouts
    Here is a link to download GhostScript and GSView:  
    You can use GhostScript and GSView to convert single-page PDF, EPS and PS files into BMP or TIFF files (which can then be converted into GIF or JPG files with your favorite graphics program). If the graphics file is generated from a vector-based draw or CAD program, using the PDF format can reduce the filesize dramatically (up to 75%), with the resolution limited only by that of your printer.  
    A vector-based drawing in PDF format is much smaller than a compressed bit map image because it contains instructions for the lines, etc., rather than the lines themselves. For schematics the lines, etc., are usually clear enough; it is the text labels that are often hard to read. In a PDF file, all of the text is stored as text, with instructions for the font used, size, color, etc. In a GIF file the text is reduced to bit maps, for a larger filesize and a fixed resolution.  
    BTW some of the "grief" you mentioned with PDF files have to do with non-standard fonts used in the original document; if those fonts are not embedded in the PDF file, the text as viewed on another computer could be quite unlike the original. And if the fonts are embedded in the file they could add considerably to the filesize of a single-page drawing. So my suggestion is that anyone authoring PDF documents stick to the basic fonts... skip those fancy fonts that come with a particular non-MS program that you bought at Target.  
    While I am "sold" on the idea of using PDF files for electronic publishing, I have many complaints about Adobe Acrobat... With Adobe originally coming from the Mac platform, they still haven't gotten used to having a right mouse button which is used extensively in the Windows environment. My big gripe has been the "Zoom" feature... with most graphics programs you left-click to zoom in and right-click to zoom out. And once you have zoomed in on an image, you'd expect the arrow keys to allow you to scroll...   :(    
Steve Ahola  
P.S. As for the much-dreaded JPG format, I do find it useful if the original page being scanned is greyscale or full color. I hate trying to clean up the artifacts ("noise") in JPG scans, but the simple reason that Pat uses them at his site is that they work. They may not look as neat as a properly calibrated BMP scan converted into a GIF file, but you can generally read all of the values if you zoom in and out, and squint your eyes a bit...   ;)   BTW his JPG scans are about 300k per page; smaller-sized JPG files can be difficult to read with all of the artifacts.

JD Sleep Thanks to all of you for your input... -- 9/4/2000 11:16 AM