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Cheuk-Hong CHENG, Oscar C. AU, Ngai-Man CHEUNG, Chun-Hung LIU, Ka-Yue YIP

High Dynamic Range Image Capturing by Spatial Varying Exposed Color Filter Array with specific Demosaicking Algorithm. Cheuk-Hong CHENG, Oscar C. AU, Ngai-Man CHEUNG, Chun-Hung LIU, Ka-Yue YIP Conference on Communications, Computers and Signal Processing, 2009. Andy { andrey.korea@gmail.com }.

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Cheuk-Hong CHENG, Oscar C. AU, Ngai-Man CHEUNG, Chun-Hung LIU, Ka-Yue YIP

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  1. High Dynamic Range Image Capturing by Spatial Varying Exposed Color Filter Array with specific Demosaicking Algorithm Cheuk-Hong CHENG, Oscar C. AU, Ngai-Man CHEUNG, Chun-Hung LIU, Ka-Yue YIP Conference onCommunications, Computers and Signal Processing, 2009. Andy {andrey.korea@gmail.com}

  2. A few dimensions of imaging

  3. Examples of multisampled imaging using assorted pixels color mosaic exposure mosaic color and polarization color and exposure

  4. False Color effect in edges

  5. Spatial Varying Exposure Array (SVE) Color planes G21 R11 R31 G41 G12 G32 B22 B42 R13 R33 G23 G43 G14 G34 B24 B44 Red Green Blue G21 G61 R11 R31 G41 R51 R71 G81 R G12 B22 G32 B42 G52 B62 G72 B82 G - exposure plane 1 R13 G23 R33 G43 R53 G63 R73 G83 B G14 B24 G34 B44 G54 B64 G74 B84 G25 G65 R15 R35 G45 R55 R75 G85 R G16 B26 G36 B46 G56 B66 G76 B86 G - exposure plane 2 R17 G27 R37 G47 R57 G67 R77 G87 B G18 B28 G38 B48 G58 B68 G78 B88

  6. Green pixel value interpolation (at red pixels) R53 R57 R53H G55V R57H G55H G21 R31 G41 G61 R71 G81 R11 R51 G12 B22 G32 G52 B62 G72 B42 B82 R13 G23 G43 R53 G63 G83 R33 R73 B24 B64 G14 G34 B44 G54 G74 B84 G25 G65 R35 G45 R75 G85 R15 R55 B46 B86 G16 B26 G36 G56 B66 G76 R17 G27 G47 R57 G67 G87 R37 R77 B28 B68 G18 G38 B48 G58 G78 B88 Exposure plane 1 Exposure plane 2

  7. Estimated green pixels R73 G21 R31 G41 G61 R71 G81 R11 R51 G12 B22 G32 G52 B62 G72 B42 B82 R13 G23 G43 R53 G63 G83 R33 B24 B64 G14 G34 B44 G54 G74 B84 G25 G65 R35 G45 R75 G85 R15 R55 B46 B86 G16 B26 G36 G56 B66 G76 R17 G27 G47 R57 G67 G87 R37 R77 B28 B68 G18 G38 B48 G58 G78 B88 Exposure plane 1 Exposure plane 2

  8. Green pixel value interpolation (at blue pixels) B24V G44H B64V G55H G21 R31 G41 G61 R71 G81 R11 R51 G12 B22 G32 G52 B62 G72 B42 B82 R13 G23 G43 R53 G63 G83 R33 R53 R73 B24 B64 G14 B24 G34 B44 G54 B64 G74 B84 G25 G65 R35 G45 R75 G85 R15 R55 B46 B86 G16 B26 G36 G56 B66 G76 R17 G27 G47 R57 G67 G87 R37 R57 R77 B28 B68 G18 G38 B48 G58 G78 B88 Exposure plane 1 Exposure plane 2

  9. Estimated green pixels G21 R31 G41 G61 R71 G81 R11 R51 G12 B22 G32 G52 B62 G72 B42 B82 R13 G23 G43 R53 G63 G83 R33 R73 B24 B64 G14 G34 B44 G54 ? G74 B84 G25 G65 R35 G45 R75 G85 R15 ? R55 B46 B86 G16 B26 G36 G56 B66 G76 R17 G27 G47 R57 G67 G87 R37 R77 B28 B68 G18 G38 B48 G58 G78 B88 Exposure plane 1 Exposure plane 2

  10. Green pixel value interpolation (at green pixels on another exposure) G21 R31 G41 G61 R71 G81 R11 R51 G12 B22 G32 G52 B62 G72 B42 B82 R13 G23 G43 R53 G63 G83 R33 R73 B24 B64 G14 G34 B44 G54 G74 B84 G25 G65 R35 G45 R75 G85 R15 ? R55 B46 B86 G16 B26 G36 G56 B66 G76 R17 G27 G47 R57 G67 G87 R37 R77 B28 B68 G18 G38 B48 G58 G78 B88 Exposure plane 1 Exposure plane 2 Now all green pixels are interpolated

  11. Interpolating blue and red pixels G21 R31 G41 G61 R71 G81 R11 R51 G12 B22 G32 G52 B62 G72 B42 B82 R13 G23 G43 R53 G63 G83 R33 B24 B64 G14 G34 B44 G54 G74 B84 G25 G65 R35 G45 R75 G85 R15 R55 B46 B86 G16 B26 G36 G56 B66 G76 R17 G27 G47 R57 G67 G87 R37 R77 B28 B68 G18 G38 B48 G58 G78 B88 Exposure plane 1 Exposure plane 2

  12. Direction categorization R11 R51 G12 B22 G32 G52 B62 G72 R33 G14 G34 B44 G54 G74 B84 R15 R55 G16 B26 G36 G56 B66 G76 R37 R77 G18 G38 B48 G58 G78 B88 Exposure plane 1

  13. Experimental results Pseudo-captured image segment Demosaicked by bilinear interpolation Tone mapped result Demosaicked by the proposed method

  14. Experimental results Pseudo-captured image segment Demosaicked by bilinear interpolation Tone mapped result Demosaicked by the proposed method

  15. Conclusions High Dynamic Range image capturing system is proposed Two exposures are captured at the same time by using SVE Interpolation algorithm is proposed Advantages • - Interpolation method could be improved • Same images are obtained simultaneously Disadvantages - Just two exposures - Hardware modifications have to be done in order to capture the image

  16. Polarization

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