Automated statistical self-calibrating detection and removal of blemishes in digital images dependent upon changes in extracted parameter values
First Claim
1. A method of automatically correcting dust artifact within images acquired by a system including a digital camera, comprising:
- (a) determining that certain pixels correspond to dust artifact regions within a first digitally-acquired image;
(b) associating the dust artifact regions with one or more extracted parameters relating to a variable optical system of said digital camera when the first image was acquired;
(c) forming an associated statistical dust map including mapped dust regions based on the dust artifact determining and associating operations and known correspondence between effects on dust artifact data of one or more different values of said one or more extracted parameters; and
(d) correcting pixels corresponding to correlated dust artifact regions within a second image acquired with said digital camera according to one or more different values of said one or more extracted parameters relating to said variable optical system based on said associated statistical dust map; and
(e) wherein said image correction method is automatically performed within a digital camera that comprises said optical system, said sensor array, said processing electronics and said memory.
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Abstract
A method of automatically correcting dust artifact within images acquired by a system including a digital camera includes determining that certain pixels correspond to dust artifact regions within a first digitally-acquired image. The dust artifact regions are associated with one or more extracted parameters relating to a variable optical system of the digital camera when the first image was acquired. An associated statistical dust map is formed including mapped dust regions based on known correspondence between effects on dust artifact data of values of extracted parameters. Pixels corresponding to correlated dust artifact regions within a second image acquired with said digital camera are corrected according to one or more different values of the extracted parameters relating to the variable optical system based on the associated statistical dust map.
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Citations
147 Claims
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1. A method of automatically correcting dust artifact within images acquired by a system including a digital camera, comprising:
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(a) determining that certain pixels correspond to dust artifact regions within a first digitally-acquired image; (b) associating the dust artifact regions with one or more extracted parameters relating to a variable optical system of said digital camera when the first image was acquired; (c) forming an associated statistical dust map including mapped dust regions based on the dust artifact determining and associating operations and known correspondence between effects on dust artifact data of one or more different values of said one or more extracted parameters; and (d) correcting pixels corresponding to correlated dust artifact regions within a second image acquired with said digital camera according to one or more different values of said one or more extracted parameters relating to said variable optical system based on said associated statistical dust map; and (e) wherein said image correction method is automatically performed within a digital camera that comprises said optical system, said sensor array, said processing electronics and said memory. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36)
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37. A method of automatically correcting dust artifact regions within images acquired by a system including a digital image acquisition device including a digital camera with a lens assembly, comprising:
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(a) determining probabilities that certain pixels within multiple digitally-acquired images correspond to one or more dust artifact regions; (b) associating probable dust artifact regions with values of one or more extracted parameters relating to a lens system of the digital image acquisition device when the images were acquired; (c) forming a statistical dust map including mapped dust regions based on the dust artifact determining and associating operations; and (d) correcting digital data corresponding to pixels within one or more digitally-acquired images correlated with mapped dust regions of the statistical dust map; (e) wherein said dust artifact regions include an aura region partially obscured by dust and a shadow region substantially obscured by dust inside said aura region; and (f) wherein said determining with respect to a shadow region is based on an extracted parameter-dependent shadow region analysis, wherein the shadow region analysis presumes that certain regions on a sensor of the digital image acquisition device are fully obscured by said dust. - View Dependent Claims (38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80)
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81. A method of automatically correcting dust artifact regions within images acquired by a system including a digital image acquisition device including a digital camera with a lens assembly, comprising:
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(a) determining probabilities that certain pixels within multiple digitally-acquired images correspond to one or more dust artifact regions; (b) associating probable dust artifact regions with values of one or more extracted parameters relating to a lens system of the digital image acquisition device when the images were acquired; (c) forming a statistical dust map including mapped dust regions based on the dust artifact determining and associating operations; and (d) correcting digital data corresponding to pixels within one or more digitally-acquired images correlated with mapped dust regions of the statistical dust map; (e) wherein said dust artifact regions include an aura region partially obscured by dust and a shadow region substantially obscured by dust inside said aura region; and (f) wherein said determining with respect to an aura region being based on an extracted parameter-dependent aura region analysis, wherein the aura region analysis presumes that certain regions on a of the digital image acquisition device are partially obscured by said dust. - View Dependent Claims (82, 83, 84, 85, 86, 87, 88, 89)
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90. A method of automatically correcting dust artifact regions within images acquired by a system including a digital image acquisition device comprising a digital camera with a lens assembly, comprising:
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(a) determining that certain pixels within one or more digitally-acquired images correspond to one or more dust artifact regions; (b) associating the dust artifact regions with values of one or more extracted parameters relating to a lens system of the digital image acquisition device when the images were acquired; (c) forming a dust map including mapped dust regions based on the dust artifact determining and associating operations; (d) correcting digital data corresponding to pixels within one or more digitally-acquired images correlated with mapped dust regions of the dust map; (e) repeating the dust artifact determining and associating operations for further acquired images after forming said statistical dust map; (f) modifying said statistical dust map based on said further images including mathematically correlating determined and associated dust artifact regions of said further acquired images with dust artifact regions in said dust map including combining data associated with dust artifact regions within images acquired with different values of one or more extracted parameters; and (g) correcting digital data corresponding to the correlated dust artifact regions within acquired images based on the modified statistical dust map. - View Dependent Claims (91, 92, 93, 94, 95, 96, 97, 98, 99, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111, 112, 113, 114, 115, 116, 117, 118, 119, 120, 121, 122, 123, 124, 125, 126, 127, 128, 129, 130, 131, 132, 133, 134, 135, 136, 137, 138, 139, 140, 141, 142, 143, 144, 145, 146, 147)
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Specification