![imagemagick replace color imagemagick replace color](https://www.photographers-toolbox.com/products/lightroomstatistics/transparencyexporter/ExportPanel_OSX.png)
Update: It seems there exist an option -define png:preserve-colormap=true which sound just like the thing I want, but it does not seem to work when using palette ?! % convert a.tga -define png:preserve-colormap=true png8:a.pngĬonvert-im6.q16: Valid palette required for paletted images `a.png' error/png.c/MagickPNGErrorHandler/1641. I'm using Debian Buster with ImageMagick 6.9.10-23 Q16 if it matters. (I tried playing with few other options, like -colors 256, -remap a.tga, png8: etc. In essence, I'd like complete color palette to remain exactly the same while converting TGA-> PNG-> TGA.Ĭan imagemagick do that and how (or if not, is there an alternative to coding my own tools)?
#Imagemagick replace color code#
Also index values not used in that image should also be preserved at same index position with same value (reason being they're going to be used later by 3rd party code which has hardcoded index values for pixel used in overlays) What I would like is for palette to remain exactly the same (for example, if in TGA index 55 had values R=200 G=150 B=100, the resulting PNG should have same values R=200 G=150 B=100 at same index position 55. However here are some things to keep in mind. I found those especially helpful when I need to do batch conversion or when I am lazy to turn on my photoshop or pixel mator. A detailed description of the properties of each color space is not provided here. Use this command to change all the images with extension png to any color that you want to (currently it is ccccccc). Image data manipulations difficult in RGB may be trivial in another colorspace. However, using simple convert a.tga a.png, PNG is created which drops unused palette colors, and other palette values get their indexes changed too.
![imagemagick replace color imagemagick replace color](https://i.stack.imgur.com/zNlKb.png)
Of those 256 colors, 239 are actually used in image for the pixel values. Source image is TARGA color indexed file, having a standard 8-bit 256-color palette to 24-bit RGB values. png (and back again later), while preserving exact palette that was used. I'm trying to use convert(1) from ImageMagick to convert from.