SYSTEMS AND METHODS FOR MITIGATING IMAGE SENSOR PIXEL VALUE CLIPPING

摘要

An imaging system may include image sensor pixels, converter circuitry, denoising circuitry, dark current subtraction circuitry, and storage and processing circuitry. The image sensor pixels may generate analog image signals and the converter circuitry may convert the analog image signals into digital pixel values. The denoising circuitry may generate denoised pixel values based on the digital pixel values. The dark current subtraction circuitry may subtract a dark current value from the denoised pixel values. The image sensor pixels and converter circuitry may generate pixel values in multiple color channels. The image sensor pixels may include clear color filter elements for generating clear pixel values. The storage and processing circuitry may determine different black pedestal values for each color channel and may add the black pedestal values to the pixel values from the corresponding color channel to mitigate pixel value clipping in a final image generated by the imaging system.

主权项

1. A method for processing image data that includes first pixel values of a first color and second pixel values of a second color that is different from the first color using an imaging system having processing circuitry, the method comprising:
with the processing circuitry, determining a first black pedestal value based on the first pixel values; with the processing circuitry, determining a second black pedestal value based on the second pixel values, wherein the second black pedestal value is different from the first black pedestal value; with the processing circuitry, adding the first black pedestal value to the first pixel values; and with the processing circuitry, adding the second black pedestal value to the second pixel values.