Patent ID: 11908137
Assignee: BEIJING ZHENHEALTH TECHNOLOGY CO., LTD.
Field: Computer technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 0:
1. A method for identifying and detecting a macular region in a fundus image, comprising:
reading a current fundus image to be positioned and detected;
detecting a macular region in the fundus image using a target detection model;
when the macular region in the fundus image is not detected, detecting an optic disk region in the fundus image, and identifying and positioning the macular region based on the detected optic disk region;
based on an identification and positioning result of the macular region, extracting a macular image corresponding to the macular region from the fundus image; and
performing multi-modal processing on the macular image, and fusing images obtained by the multi-modal processing to obtain a fused image, wherein
the process of identifying and positioning the macular region based on the detected optic disk region comprises:
obtaining a central coordinate of the optic disk region; and
obtaining a central coordinate of the macular region according to the central coordinate of the optic disk region in combination with a multiple linear regression model, wherein when the central coordinate of the macular region is obtained according to the central coordinate of the optic disk region in combination with the multiple linear regression model, based on a formula:

Y=WX+B, 

the central coordinate of the macular region is calculated,
wherein Y is the central coordinate of the macular region, X is the central coordinate of the optic disk region, and both W and B are matrix parameters;
W and B are determined by a least square method;
and the following matrix solving formula is used when W and B are determined by the least square method:, [
    
     w
     ,
     B
    
    ]
   
   =
   
    
     
      (
      
       
        X
        0
        T
       
       ⁢
       
        X
        0
       
      
      )
     
     
      -
      1
     
    
    ⁢
    
     X
     0
     T
    
    ⁢
    
     Y
     1
    
   
  
  ⁢
  

  
   
    
     X
     0
    
    =
    
     
      [
      
       
        
         X
        
       
       
        
         1
        
       
      
      ]
     
     1
    
   
   ,
  
 

wherein X0 is a matrix vector, consisting of a matrix vector X and a vector 1; and
the images obtained by the multi-modal processing are fused by image channel superposition to obtain the fused image.