Nexus 5 Gamma Calibration
So I have been using XDA for the last 3yrs to help with rooting adding custom kernels and so on, but I have only used it to read and keep up with my kernel or rom I was using, never tried posting...till today. So I think this is were I am supposed to post my first comments/questions since I am unable to post reply's in the thread regarding this, anyways... on to what I have found works on my phone. I was always able to get the gamma correct on all colors but the problem was the white balance/ tint of the screen, it was always to reddish. I made a chart of each color graphing each value. I noticed that between the three colors the only significant difference was in the red color of the first 9 values slots. I also found out that i can complete change the gamma using values in ROW 2 ,COLUMN 5 and ROW 3, COLUMN 1. I found that increasing these values together in the same increments will increase the gamma. For example- if you increase the value of ROW 2, COLUMN 5 by 5 then raise it the same amount in ROW 3, COLUMN 1. The higher the value the more you increase the gamma, the lower the number the more you decrease gamma. So I set the gamma so it was 2.2 for all colors using this method. Since I found out that the red was drastically different in the first 9 slots compared to green and blue I took the average of green and blue for each slot (within the first 9 slots) and applied that avg to the corresponding red slots. This method not only got me nearly perfectly at gamma 2.2 but corrected the tint/white balance of the screen. I no longer have a reddish tint or yellow. I hope someone else tries this to see if it works for them or if they can add too or better this so we all have a better calibrated screen.
Update: After plotting if values are off still whatever your lowest color value is do the average and raise it. Also I think when fine tunning secondary colors (cyan, Magenta, yellow) ROW 3, COLUMN 2