sremick Posted July 30, 2009 Report Share Posted July 30, 2009 I'm no graphics expert, but I'm having a hard time understanding why these two 16x16 files would have such a big file difference: http://www.ninstation.com/Themes/default/images/greenmushroom.png 3,735 bytes, 180 colors, 16.7M palette http://www.ninstation.com/Themes/default/images/redmushroom.png 879 bytes, 196 colors, 16.7M palette I tried running OptiPNG on the first to no avail... it said it was already as optimized as it can be. I'm hoping whatever I learn from this case example will allow me to do better in the future in making images (and maybe go back and optimize some other ones I have that may be bigger than necessary). Quote Link to comment Share on other sites More sharing options...
Michael D. Posted July 30, 2009 Report Share Posted July 30, 2009 I ran them both through PhotoShop and exported them as a 24-bit PNG preserving the alpha channel on both and came up with 861 bytes and 863 bytes respectively Quote Link to comment Share on other sites More sharing options...
kocchi Posted July 31, 2009 Report Share Posted July 31, 2009 Did you modify and overwrite the files already? The filesize of those two images seems to not match what you've posted here.Sometimes image editors can leave some metadata about the image as part of the image data which may make the image a lot larger than it needs to be. It's good to run large images through some kind of image optimizer. I'm no graphics expert, but I'm having a hard time understanding why these two 16x16 files would have such a big file difference: http://www.ninstation.com/Themes/default/images/greenmushroom.png 3,735 bytes, 180 colors, 16.7M palette http://www.ninstation.com/Themes/default/images/redmushroom.png 879 bytes, 196 colors, 16.7M palette I tried running OptiPNG on the first to no avail... it said it was already as optimized as it can be. I'm hoping whatever I learn from this case example will allow me to do better in the future in making images (and maybe go back and optimize some other ones I have that may be bigger than necessary). Quote Link to comment Share on other sites More sharing options...
sremick Posted July 31, 2009 Author Report Share Posted July 31, 2009 Did you modify and overwrite the files already? The filesize of those two images seems to not match what you've posted here. Yep, sorry. Mike tried running them through Photoshop, just opening and re-saving. You can check the original here: http://www.ninstation.com/Themes/default/i...ushroom_old.png Sometimes image editors can leave some metadata about the image as part of the image data which may make the image a lot larger than it needs to be. It's good to run large images through some kind of image optimizer. I actually tried running it through OptiPNG with no improvement. And both files were edited and saved the same way with the same program (Paint.NET). Still confused, even though it was fixed. Quote Link to comment Share on other sites More sharing options...
Michael D. Posted July 31, 2009 Report Share Posted July 31, 2009 Yeah, those images are linked to directly so when he uploaded the copies I made for him it overwrote the larger copies Quote Link to comment Share on other sites More sharing options...
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