Image processing method and image processing device for high dynamic range image

• Main Authors: CHEN WEI, CHI GUOQUAN, SUN SHUYUN
• Format: Patent
• Language: Chinese; English
• Published: 23.11.2021
• Subjects: ELECTRIC COMMUNICATION TECHNIQUE; ELECTRICITY; PICTORIAL COMMUNICATION, e.g. TELEVISION

The invention discloses an image processing method and an image processing device for a high dynamic range image. The method comprises the following steps: obtaining the high dynamic range image; collecting a brightness value of each pixel in the high dynamic range image; obtaining a first maximum brightness value and a first preset brightness value; according to the first preset brightness value, obtaining a first type of pixels and a second type of pixels from the pixels of the high dynamic range image; obtaining a first mapping curve according to each first type of pixels; obtaining a second mapping curve according to each second type of pixels, wherein the second mapping curve is continuous with the first mapping curve; and mapping the high dynamic range image according to the first mapping curve and the second mapping curve to obtain a target low dynamic range image. According to the image processing method, the compressed target low-dynamic-range image can display rich details in the high-dynamic-range