Dynamic allocation of dynamic bins for variable dynamic range image content

Methods and systems include determining an upper boundary of brightness values of high-dynamic range image content. Using the determined upper boundary, end points of bins of histogram values are determined. Using the determined end points of the bins of histogram values, luma values are allocated to the bins. The high-dynamic range image content is processed based at least in part on the allocations to the bins. Image data including the processed high-dynamic range image content is displayed via an electronic display.