Hello ,every one .
now i am using the image tunning tools to tunning the aptina mt9m034 sensor.and in light box i get 5 rawTI file at 2700k 4000k 5000k 6500k 7500k to get the rgb2rgb parameter.
the result is
when in 4000k the wb data is
437 /512 R gain 20 offset R
327 /512 R gain -81offset R
327/512 R gain -81 offset R
844/512 R gain 16 offset R
when in 6500k the wb data is
877/512 R gain -1offset R
490/512 R gain -74offset R
490/512 R gain -74 offset R
529/512 R gain -26 offset R
i know that the white balance can Affect the rgb2rgb matrix. but i was confused is that the white balace get from image tunning tools have very big offset.
such as when in 4000k rawTI file ,the offset of Gr and Gb is -81,and when in 6500k rawTI file,the offset of Gr and Gb is -74.
when i only use the rgb2rgb2 matrix in ipnc ,the image is not good .
i have three question ,can you help me ?
1.does such a large offset value indicates the WB is wrong? and so as the rgb2rgb matrix ?
2.how can i know whether the rgb2rgb matrix is good? if the wb offset value is very close to zero,does it indicate that the rgb2rgb value is good?
3.how should i do to get the best rgb2rgb matrix ?
thank you very much.
