US 11,689,814 B1
System and a method for processing an image
Sam Tak Wu Kwong, Hong Kong (CN); Zhangkai Ni, Hong Kong (CN); Yue Liu, Hong Kong (CN); and Shiqi Wang, Hong Kong (CN)
Assigned to CENTRE FOR INTELLIGENT MULTIDIMENSAIONAL DATA ANALYSIS LIMITED, Hong Kong (CN)
Filed by Centre for Intelligent Multidimensional Data Analysis Limited, Hong Kong (CN)
Filed on Dec. 2, 2021, as Appl. No. 17/540,468.
Int. Cl. H04N 23/741 (2023.01); G06T 5/40 (2006.01); G06T 5/00 (2006.01); G06N 3/08 (2023.01)
CPC H04N 23/741 (2023.01) [G06N 3/08 (2013.01); G06T 5/009 (2013.01); G06T 5/40 (2013.01)] 13 Claims
OG exemplary drawing
 
1. A method for processing an image comprising the steps of:
receiving an input image showing a scene composed by a combination of a plurality of image portions of the input image, wherein one or more of the plurality of image portions is associated with an exposure level deviated from an optimal exposure level;
processing the input image by applying an exposure/image relationship to the input image, wherein the exposure/image relationship is arranged to adjust the exposure level of each of the plurality of image portions towards the optimal exposure level; and
generating an enhanced image showing a visual representation of the scene composed by a combination of the plurality of image portions of the input image with an adjusted exposure level,
wherein one or more of the plurality of image portions is further associated with loss of details in a visual representation of the image due to an over-exposure level or an under-exposure level associated with the corresponding image portions of the image,
wherein the step of processing the input image by applying the exposure/image relationship to the input image comprises the step of recovering visual details in the image portions associated with the over-exposure level or the under-exposure level, and
wherein the step of processing the input image by applying the exposure/image relationship to the input image comprises the step of processing gated images lo or lu indicating respectively the image portions associated with the over-exposure level or the under-exposure level with a confidence map Mo or Mu, to determine a probability of information loss in the corresponding image portion.