Devices and methods for creating structure histograms for use in image enhancement

摘要

Systems, methods, and computer readable media expounding “Structure Histograms” and their use are presented. Structure Histograms may be described as histograms whose individual entries (values) express a functional relationship between a given pixel (or group of pixels) and its neighboring pixels. As such, Structure Histograms capture information about the structure of an image in so far as they record information related to the relative placement of pixels within an image (e.g., are pixels of a common value closely spaced or spaced far apart). Structure Histograms may be generated from tonal pixel values (e.g., red, green and blue values), luminance pixel values (e.g., gray scale pixel values) or cross-channel pixel values (e.g., red-luminance, green-blue, or green-blue-luminance pixel values). Structure Histograms may be used in a number of image processing contexts such as, for example, automated image enhancement operations.

主权项

1. A non-transitory program storage device, readable by a processor and comprising instructions stored thereon to cause the processor to:
obtain an image having pixels; select, from the pixels, a first pixel having a first pixel value, the first pixel value corresponding to a first entry of a histogram; identify, from the pixels, a neighbor pixel having a neighbor pixel value, the neighbor pixel value corresponding to a second entry in the histogram; update each histogram entry between the first and second entries of the histogram; generate one or more filter parameter values based, at least in part, on the histogram; and enhance the image based, at least in part, on the one or more filter parameter values.