Systems and methods for determining histograms

An apparatus for determining a histogram, comprising:

• a memory bank that stores a plurality of histograms, each histogram corresponding to a group of pixels in a region of interest of an image;
• and
• a processor having a local memory configured to receive one or more histograms from the memory bank, the processor being configured to:
• initiate transfer of one or more histograms between the memory bank and the local memory;
• find, for an incoming pixel, weights of each bin for the one or more histograms stored in the local memory;
• and
• add the weights to the one or more histograms stored in the local memory, wherein the local memory transfers one or more updated histograms to the memory bank, and the memory bank replaces a corresponding one or more histograms with the one or more updated histograms.

An apparatus for determining a histogram, comprising:

• means for storing a plurality of histograms in a memory bank, each histogram corresponding to a group of pixels in a region of interest of an image;
• means for initiating transfer of one or more histograms between the memory bank and a local memory;
• means for finding, for an incoming pixel, weights of each bin for the one or more histograms stored in the local memory;
• means for adding the weights to the one or more histograms stored in the local memory;
• means for transferring one or more updated histograms from the local memory to the memory bank;
• and
• means for replacing a corresponding one or more histograms in the memory bank with the one or more updated histograms.