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Index › Programming Questions & Help › Other Libraries › Can you load PNGs as 8 bit grayscale
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Can you load PNGs as 8 bit grayscale? (Read 348 times)
todicus
Can you load PNGs as 8 bit grayscale?
Mar 6th, 2008, 4:31am  
I'm working on a project which involves loading a ton of little black and white PNGs into memory.  The default imageLoad() method in Processing loads them as RGBs, which I think is using 3 times as much memory as is necessary.  Does anyone know a way to load images as a single channel?

   Thank you --

           -- Todd
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JohnG
Re: Can you load PNGs as 8 bit grayscale?
Reply #1 - Mar 6th, 2008, 9:24am  
Unfortunately everything is stored as ARGB within processing no matter what format. They're also stored de-compressed so even if you've managed to crunch the png file down to a small file size, when i's loaded into processing it uses 4*number of pixels bytes.
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todicus
Re: Can you load PNGs as 8 bit grayscale?
Reply #2 - Mar 6th, 2008, 11:47pm  
I was thinking a possible work-around for this might be to load a grayscale image into each channel of a PImage, and then convert the proper channel to a RGB with equal R/B/G values at display time.  This might be really processor-intensive.  I haven't tried it yet, as I haven't hit the memory wall, but I'll post back if I do give it a shot.
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