Method and apparatus for dynamic range mapping

• Main Authors: YU, QUAN-HE, XU, WEI-WEI, CHEN, HU, WANG, YIUAN
• Format: Patent
• Language: Chinese; English
• Published: 16.11.2021
• Subjects: ELECTRIC COMMUNICATION TECHNIQUE; ELECTRICITY; PICTORIAL COMMUNICATION, e.g. TELEVISION

This application provides a dynamic range mapping method and apparatus, to help avoid an abnormal phenomenon that luminance of a pixel of a terminal device after mapping is brighter than an original image when maximum display luminance of an image is close to maximum display luminance of a display device. The dynamic range mapping method includes: obtaining a display parameter of a terminal device; and; obtaining feature information of image data; obtaining a first parameter of a first tone mapping curve of the image data; and; when a preset condition is met, obtain a second parameter of a second tone mapping curve based on the first parameter, the display parameter of the terminal device, and the characteristic information of the image data, wherein output luminance at the first point on the second tone mapping curve is not higher than input luminance at the first point on the second tone mapping curve; and; performing dynamic range mapping on the image data according to the second parameter of the second to