You could probably work out a partial response from the CCM used in the ISP - take a picture and extract the makernote data and you can get the CCM.
Lol, you've completely lost me there! CCM? ISP? Makernote data?
Over my head I'm afraid.
CCM = colour correction matrix. The matrix used to compensate for the spectral response of the filters in the sensor- all RGB values from the sensor (after a lot of debayering etc since the sensor isn't RGB) are multiplied out by this 3x3 matrix
ISP = Image system pipeline - the path the image data takes from the sensor to finally being a image that looks like an image. Lots of stages here.
makernote data = data stored in the JPEG file which contains supplier specific information (ie not in the standard EXIF data). In our case, this is a string added by the ISP to record certain setting used when taking the picture.
If that still doesn't make sense, then you probably don't need the spectral response curve anyway.
Principal Software Engineer at Raspberry Pi (Trading) Ltd.
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