Processing 1.0 - Processing Discourse - Saving as 300 dpi TIFF or .PS files

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Index › Programming Questions & Help › Programs › Saving as 300 dpi TIFF or .PS files

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Saving as 300 dpi TIFF or .PS files (Read 1822 times)

mulder

Saving as 300 dpi TIFF or .PS files
May 8^th, 2008, 5:01pm

I've got a few projects saving as .tiff files, but they're only at 72 dpi and I need at least 300 dpi .tiff or .ps files instead. These are pixel-based drawings, so I'd prefer .ps files for scalability.

Here's the code for one of them.

http://www.divshare.com/download/4451734-be8

Can anyone help with the changes needed to accomplish what I need?

« Last Edit: May 9^th, 2008, 12:02am by mulder »

oliverjenks

Re: Saving as 300 dpi TIFF or .PS files
Reply #1 - May 18^th, 2008, 10:04pm

I have just started playing around with Processing so not sure if there is a better method. However, have you thought about increasing the canvas size by a factor of 4.166 (300 / 72), then using an Image editor.

Your results with very large canvas sizes may vary. I have spent a bit of time recently getting an image scaled to print quality. You might need to allocate more memory to Processing.

Also rendering parts of the image as tiles may be of interest to you;

http://processing.org/discourse/yabb_beta/YaBB.cgi?board=OpenGL;action=display;num=1159148942;start=11#11

mulder

Re: Saving as 300 dpi TIFF or .PS files
Reply #2 - May 18^th, 2008, 10:16pm

Yes, I tried increasing the size of the canvas by 4.166, then saving a drawing and editing with Photoshop, but that didn't seem to change anything for the better. By the time I got done throwing away all the extraneous background, resizing, and changing the dpi to 300 from 72, I was left with a much smaller file, but as I scaled it up to 100 percent, I could still see the square pixels used in each line of the drawing; even more so as I made it larger.

Also, the larger the canvas is, the more memory it takes to avoid out of memory errors and the less likely the image is to be drawn in the center, so if you can't see the whole thing, it's hard to know whether or not you should bother saving it.

What I really need is scalability, by saving to a .ps format.

JohnG Ex Member	Re: Saving as 300 dpi TIFF or .PS files Reply #3 - May 18^th, 2008, 10:37pm You can save to PDF, and that prints just fine.

mulder YaBB Newbies Offline Posts: 6	Re: Saving as 300 dpi TIFF or .PS files Reply #4 - May 18^th, 2008, 11:00pm As long as it's scalable without any loss of resolution, that works for me. Can you tell me the exact lines of code to add, and point out where, since I have a number of similarly structured files?

JohnG Ex Member	Re: Saving as 300 dpi TIFF or .PS files Reply #5 - May 18^th, 2008, 11:04pm http://processing.org/reference/libraries/pdf/index.html has al the information you need to get PDF export working.

mulder

Re: Saving as 300 dpi TIFF or .PS files
Reply #6 - May 18^th, 2008, 11:15pm

I'm sure that link has the information I need, but since I'm not a programmer, I have no idea how to use it, or where.

But I did notice at the end that it said it saves the information into a PDF at 72 dpi, rather than as a scalable vector. So that suggests that even if I want to scale and print the image, it will always be a 72 dip-based drawing, when I really need a vector-based format.

Is that right, or am I missing something?

JohnG Ex Member	Re: Saving as 300 dpi TIFF or .PS files Reply #7 - May 18^th, 2008, 11:24pm It actually saves everything as vectors, except PImages, since they're pixel data originally, and you have to use createFont instead of loadFont to get vector fonts. It's hard to tell you what to add since it depends on the programs.

mulder YaBB Newbies Offline Posts: 6	Re: Saving as 300 dpi TIFF or .PS files Reply #8 - May 18^th, 2008, 11:31pm If you haven't already, you could download one of the code files which is already setup to save as .tif, then modify it to make it save as PDF instead, with //comments to indicate what you changed. Since the code files I have are similar, it should work the same on all of them, so I might as well try that first.

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