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D3-3P-TDA3X-SK: After using the DCC tool, the resulting output has quantization/banding in the image

Part Number: D3-3P-TDA3X-SK

Following the documentation that comes with the DCC tool, I completed the Black Level Subtraction, LSC, AWB, Color Correction, Gamma, EE, and Noise Filter 3 plugins. Unfortunately I was unable to see the effects of each plug in on the system using the buttons that send plugin outputs to flash or RAM. My question is what plugin likely caused this? The untuned system did not exhibit the banding shown below.

Upon compiling the results of the plugins into an appimage, the resulting image had contouring/banding that looks like a quantization artifact as shown near the corner of the room in this capture:


AE picks very short exposure times and low analog/digital gain values, resulting in images like this that are underexposed, but that may be a separate issue.

Even when setting manual exposure the banding is still present:

  • Hi,

    It is probably due to the combination of LSC, NSF3, local tone mapping, and gamma (quantization).
    I don't think there is anything wrong in what you did for each individual component.

    For these gradient backgrounds, the image becomes really smooth after LSC and NSF3, then GLBCE and gamma result in visible 2D quantization contours.

    I don't have any simple/good solution (TRM says GLBCE has dithering, but it is not really effective).
    It can only be mitigated by tuning.
    You may try to tune LSC and NSF3 a little weaker to see if it helps.