Reference: RGB->XYZ matrix
Reference: xyY->RGB matrix (inverse of above)
Measurement Temperatures: count, t1, t2, ...
Target: xyY
Igama
Ig = I
1/0.519 where I = 0/255 ... 255/255
CalibData:
CalibHex:
Help
Measurements
Click save to remember the entered measurements
Click reset to load default measurement values
xyY_Rref = user supplied reference Red
xyY_Gref = user supplied reference Green
xyY_Bref = user supplied reference Blue
xyY_Wref = user supplied white point
Color Spaces
White Point Reference
Color Converter
Imax = maximum input value Brightness
PWMmax = maximum PWM resolution
T_min = measurements at minimum temperature
T_mid = measurements at medium temperature
T_max = measurements at maximum temperature
Calibration
To generate the hex file with calibrated coeffieients
-
Copy data under CalibHex in to the file calib_data.txt
- Run the python script patch_calib.py
-
Program the device with generated hexfile
app_with_calib.hex
Test
To calculate color point
-
Enter Red (0..255), Blue (0..255), Green (0..255),
Intensity within recommended value and Temperature
values (-50..150)
- Click on Point
- expected reference color value shown as xyz or xyY
- expected device color value shown as RGB or PWM