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    • 71. 发明公开
    • METHOD AND DEVICE FOR ENHANCING QUALITY OF AN IMAGE
    • VERFAHREN UND VORRICHTUNG ZUR VERBESSERUNG DERQUALITÄTEINES BILDES
    • EP3100233A1
    • 2016-12-07
    • EP15700670.1
    • 2015-01-15
    • Thomson Licensing
    • TURKAN, MehmetTHOREAU, DominiqueGUILLOTEL, Philippe
    • G06T5/50G06T3/40
    • G06T3/4076G06T5/20G06T5/50
    • A method for enhancing quality of an image comprises deriving from an initial low-resolution image (LRI) an initial high-resolution image (IHRI) by upsampling (S2, S3), providing (S4), based on the initial low-resolution image (LRI), at least one downsampled filtered image (AIij, AIi′j′) with lower resolution, providing (S6), based on the initial low-resolution image (LRI), an unfiltered image (LRI, UIi′j′) having same resolution as the downsampled filtered image, selecting a patch (PI) from the initial high-resolution image (IHRI), finding (S8) filial patches (PA k) similar to the selected patch in the downsampled filtered image (AIij, AIi′j′), finding, in the unfiltered image (LRI, UIi′j′), parent patches (PPk) locally associated to the filial patches (PAk), and linearly combining (S14) the parent patches (PPk) to form an enhanced quality patch (EP). Finally, enhanced quality patches (EP) obtained by repeatedly carrying out above steps are combined (S15) to form an enhanced quality high-resolution image (EIp).
    • 一种用于增强图像质量的方法包括:通过上采样(S2,S3)从初始低分辨率图像(LRI)导出初始高分辨率图像(IHRI),基于初始低分辨率图像提供(S4) (LRI),具有较低分辨率的至少一个下采样滤波图像(AIij,Ali'j'),基于初始低分辨率图像(LRI)提供(S6)未滤波图像(LRI,UIi'j') 具有与下采样滤波图像相同的分辨率,从初始高分辨率图像(IHRI)中选择斑块(PI),找到(S8)与下采样滤波图像(AIij,AIi)中的所选补片相似的fil斑(PA k) 'j'),在未过滤的图像(LRI,UIi'j')中找到与fil片(PAk)局部相关联的母体斑块(PPk),以及线性组合(S14)母体斑块(PPk)以形成 增强质量补丁(EP)。 最后,通过重复执行上述步骤获得的增强质量贴片(EP)被组合(S15)以形成增强的高质量高分辨率图像(EIp)。
    • 73. 发明公开
    • METHOD AND APPARATUS FOR PERFORMING SUPER-RESOLUTION OF SINGLE IMAGES
    • 方法和设备实施了超解像单幅图像
    • EP2948922A1
    • 2015-12-02
    • EP14701171.2
    • 2014-01-21
    • Thomson Licensing
    • TÜRKAN, MehmetTHOREAU, DominiqueGUILLOTEL, Philippe
    • G06T3/40
    • G06T3/4053
    • A method for performing super-resolution of a single image comprises steps of downsampling (S
      1 ) a LR input image by a first factor, separating the LR input image into overlapping blocks (x
      i ), and for each of the blocks (x
      i ) searching similar blocks in the downsampled LR images, determining blocks (c
      i ,
      1 ,c
      i ,
      2 ,c
      i ,
      3 ) at corresponding positions in the LR input image, locally optimizing (S
      4 ) the blocks by linear approximation to obtain locally optimized patches (z
      k
      a ), downsampling (S
      5 ) the locally optimized patches (z
      k
      a ) by the first factor to obtain a downsampled locally optimized patch (z
      k
      a,d ), comparing the downsampled locally optimized patch (z
      k
      a,d ) with the input block (
      x
      i
      0 ) and optimizing the number and/or weights (w
      i,1 ,w
      i,2 ,w
      i,3 ) of the determined blocks (c
      i ,
      1 ,c
      i ,
      2 ,c
      i ,
      3 ), wherein a locally optimized patch (x
      1
      i ) is obtained, and repeating the above steps with different sampling factors, wherein for each repetition the locally optimized patch (x
      1
      i , x
      2
      i , x
      3
      i ) of the previous iteration is used as input block. The locally optimized patch (x
      3
      i ) of the last iteration are accumulated and averaged (S
      8 ), and IBP (S
      9 ) is performed to obtain a HR output image (S
      10 ).