Visible to Intel only — GUID: ssc1701708611444
Ixiasoft
Visible to Intel only — GUID: ssc1701708611444
Ixiasoft
12.3. Black Level Correction IP Functional Description
The pedestal remover subtracts the offset values from the input pixel values. The IP clips negative values to zero if you turn off Reflect around zero, or if you turn on Reflect around zero but set the run-time CONTROL register Clip Zero En bit to turn on clipping to zero. The IP reflects the negative values around zero if you turn on Reflect around zero and clear the run-time CONTROL register Clip Zero En bit to turn off clipping at zero.
The scaler part of the IP multiplies the intermediate result after subtraction with an arbitrary factor that you program over the external processor interface. You must calculate the correct multiplication factor from the dynamic range of the video stream and the pedestal value. The IP clips the overflowed values to the maximum value of the output video stream.
You must set the color filter array phase to its correct value, which depends on the framing, rotation, and flipping options you apply on the original image that an imaging sensor captures. If you do not set the correct color filter array phase, the IP may mix color channels and produce incorrect outputs.