At the left end of the formula is the result, the RGB color components in the sRGB space. M is a matrix and sRGB y RGBraw are vectors with the RGB color components.Īt the right end of the equation we have as input, the RGB components from the camera raw channels (RGB raw), we have that data from the raw photo file. The simplest way to transform camera raw RGB values to another RGB space as sRGB is through the use of a color matrix formula like those we introduced above see here.įormula to convert camera raw values to sRGB. How to Transform Camera raw RGB values to sRGB values? So we need first to transform the colors from the camera raw space to the sRGB one before to put them in the image file. However, the color coordinates from the raw file are in the camera raw color space, that is a RGB space which is defined by the chromaticities of its primary colors, in this case by the chromaticities for which the photosites are color sensitive, and this RGB color space is -surely- not the sRGB space, which has another primaries. We took the color RGB values from the raw file and put them directly in the sRGB image just after a previous gamma correction. First we have to state, we chose to build the image in the sRGB space because, without the required tags in the image file -which we are not putting on it-, most applications will assume the image pixel values (RGB coordinates) are in the sRGB space, and by making this correct, they will display it correctly.
Now we can explain clearly why our first development try was wrong. A Matrix Interpolated from the DxO mark Ones.How to Transform Camera raw RGB values to sRGB values?.
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