Systems and methods for determining noise statistics of image data

摘要

The present disclosure generally relates to systems and methods for image data processing. In certain embodiments, an image processing pipeline may compute noise statistics associated with image data by receiving a frame of the image data having a plurality of pixels. The image processing pipeline may then identify a plurality of portions of the frame of the image data such that each portion of the plurality of portions has a flat surface. The image processing pipeline may then calculate a plurality of gradients for each portion of the plurality of portions, determine one or more dominant gradient orientations for each portion of the plurality of portions, and generate a histogram that represents a plurality of dominant gradient orientations that corresponds to the plurality of portions. After generating the histogram, the image processing pipeline may store the histogram, which may represent the noise statistics, in a memory.

主权项

1. Image signal processing circuitry, comprising:
an image processing pipeline configured to compute noise statistics associated with image data by:
receiving a frame of the image data comprising a plurality of pixels acquired using a digital image sensor;identifying a plurality of portions of the frame of the image data, wherein each portion of the plurality of portions comprises a flat surface;calculating a plurality of gradients for each portion of the plurality of portions;determining one or more dominant gradient orientations for each portion of the plurality of portions;generating a histogram that represents a plurality of dominant gradient orientations that corresponds to the plurality of portions; andstoring the histogram in a memory, wherein the histogram represents the noise statistics.