Noise estimation method and device, image processing method and device, and storage medium

• Main Authors: CHEN WEI, CHI GUOQUAN, SUN SHUYUN
• Format: Patent
• Language: Chinese; English
• Published: 02.05.2023
• Subjects: CALCULATING; COMPUTING; COUNTING; ELECTRIC COMMUNICATION TECHNIQUE; ELECTRICITY; IMAGE DATA PROCESSING OR GENERATION, IN GENERAL; PHYSICS; PICTORIAL COMMUNICATION, e.g. TELEVISION

The invention discloses a noise estimation method, an image processing method and device, and a storage medium, and the noise estimation method comprises the steps: carrying out the partitioning processing of a to-be-estimated image synthesized by a long-frame image and a short-frame image: carrying out the noise estimation based on the long-frame image when a to-be-estimated pixel position is located in a dark region; when the to-be-estimated pixel position is located in the bright area, noise estimation is carried out based on a short frame image in combination with an exposure ratio; and when the to-be-estimated pixel position is located in the transition area, noise estimation is carried out based on the long frame image and the short frame image in combination with preset values such as a synthesis parameter, an exposure ratio and a maximum display value. Therefore, the noise estimation method provided by the invention can accurately estimate the noise condition of each region of the high-dynamic-range c