Patent ID: 11972561
Assignee: CANON U.S.A., INC.
Field: Computer technology (Electrical engineering)
Classification: CPC A  G | IPC G

Claim 6:
7. The device of claim 1, wherein one or more of the following:
(i) the A-line(s), frame(s), or image(s) is/are defined by a block or set of A-lines and forms/form a two-dimensional (2D) Optical Coherence Tomography (OCT) image(s) or frame(s) when translated to Cartesian coordinates;
(ii) during image or frame processing or pre-processing, pixels which correspond to the imaging probe, an artifact, and/or extravascular tissue areas are set to zero by the one or more processors, and the one or more processors apply filtering;
(iii) during image or frame processing or pre-processing, pixels which correspond to the imaging probe, an artifact, and/or extravascular tissue areas are set to zero by the one or more processors, and the one or more processors apply filtering, and the filtering is a mean filtering, a spatial filter, and/or a sliding window or kernel spatial filter, which replaces a central value of the window with a mean intensity value of the pixels that belong to the window, and, for an image I and a window having size N×N, the value of the window's central pixel (i,j) is replaced by the, M
      N
    
    ⁢
    
      :
    
    ⁢
    
      1
      NxN
    
    ⁢
    
      Σ
      
        m
        ,
        
          n
          ∈
          NxN
        
      
    
    ⁢
    
      I
      ⁡
      
        (
        
          m
          ,
          n
        
        )
      
    
  
  ,, where m, n are the pixels belonging to the window N×N; and/or
(iv) during image or frame processing or pre-processing, pixels which correspond to the imaging probe, an artifact, and/or extravascular tissue areas are set to zero by the one or more processors, and the one or more processors apply filtering, and the filtering is Gaussian filtering or bilateral filtering, and/or the one or more processors further operate to use convolutions to replace an intensity of a central pixel of a mask with a weighted average of intensities of the neighborhood pixels.