Question
ISP IQTune 2.0.0 AWB R/B Ratios Wrong
When using the ISP IQTune application to generate ISP parameters for the STM32N6 DCMIPP, the Auto White Balance expresses an error that I believe is incorrect. The error claims that AWB cannot start becase the R/B ratios for white balance must decrease, as the color temperature increases. The ratio IS decreasing, as shown in the image below.
When the temperature is 5100K, the R/B ratio is 2.1/1.9 = 1.105
When the temperature is 3800K, the R/B ratio is 2.3/1.9 = 1.210
Thus, as the temperature increases, the R/B ratio decreases. Either this is wrong, or I’m missing a key component of this calibration process.
