For the couple of weeks, I have been spending way too much time trying to develop a way to demosaic infrared raw files without interpolation. My reasoning is that, with a deep IR filter in front of the sensor, that the spectral response of each of the color filter array (CFA) planes is pretty close… [Read More]

I was unable to figure out why Lightroom is boosting the brightness and chroma of 32-bit floating point TIFFs imported into it, so I reluctantly decided to use the correctly-exposed synthetic image with the minus one-stop Lightroom Exposure adjustment as the reference and compute errors from it. I computed the CIEL*a*b* Delta-E stats of the… [Read More]

Eric Chan has informed me that there are two image-processing pipelines in Lightroom: output-referred, and scene-referred. Raw files get the scene-referred pipeline. Integer TIFFs get the output-referred pipeline. Therefore, all my TIFF test images were getting a different set of processing than LR applies to raw files. I’ve done some testing with real raw files,… [Read More]

[Added after the original post. Eric Chan has informed me that there are two image-processing pipelines in Lightroom: output-referred, and scene-referred. Raw files get the scene-referred pipeline. Integer TIFFs get the output-referred pipeline. Therefore, the TIFF test images are getting a different set of processing than LR applies to raw files.] I can’t just leave… [Read More]