Pixel contrast control systems and methods

An electronic device comprising a display pipeline configured to be coupled between an image data source and a display panel, wherein the display pipeline comprises:

• pixel contrast control processing circuitry comprising circuit connections programmed to:
• determine first pixel statistics indicative of content of a current image frame based at least in part on received image data that indicates an initial target luminance of a corresponding display pixel implemented on the display panel during the current image frame, wherein determining the first pixel statistics comprises:
• determining an active region in the current image frame, wherein the active region comprises a first set of local windows;
• determining a plurality of luma values, each associated with one image pixel in the current image frame;
• determining a first global luma histogram based at least in part on luma values associated with each image pixel in the active region;
• and
• determining a plurality of local luma histograms each associated with a corresponding local window of the first set of local windows based at least in part on luma values associated with each image pixel in the corresponding local window;
• and
• apply a first plurality of local tone maps determined based at least in part on second pixel statistics associated with a previous image frame to determine modified image data that indicates a modified target luminance of the corresponding display pixel during the current image frame;
• and
• a pixel contrast control controller coupled to the pixel contrast control processing circuitry, wherein the pixel contrast control controller is programmed to execute firmware instructions to determine a second plurality of local tone maps to be applied during a next image frame based at least in part on the first pixel statistics received from the pixel contrast control processing circuitry.