TONE MAPPING CIRCUIT AND TONE MAPPING METHOD

摘要

PROBLEM TO BE SOLVED: To provide a tone mapping circuit configured to reduce circuit scale, power consumption, cost, and computation time without impairing continuity of output images, and a tone mapping method.;SOLUTION: A tone mapping circuit includes: a global feature quantity calculation circuit which calculates global feature quantity of an HDR image of a current frame; a local feature quantity calculation circuit which calculates local feature quantity of a block image, and calculates local feature quantity of pixels by interpolating local feature quantities of a block image of a previous frame; a gain calculation circuit which calculates feature quantity of gain and total on the basis of global feature quantity of a previous frame, local feature quantity of pixels, and target luminance; and a gain application circuit which applies the feature quantity of gain and total to data of pixels to be processed.;SELECTED DRAWING: Figure 1;COPYRIGHT: (C)2020,JPO&INPIT