Image processing apparatus
First Claim
1. An image processing apparatus for removing shadows of a main subject, from a photographic image in which the shadows are present within a background having a simple pattern, comprising:
- shadowless background region extracting means for extracting a shadowless background region, in which the shadows are not present, from the photographic image;
shadow region extracting means for extracting a shadow region, from regions within the photographic image other than the shadowless background region; and
correcting means, for removing the shadows from the photographic image, by adjusting pixel values of the shadowless background region and/or the shadow region.
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Accused Products
Abstract
A local region determining section determines a region above a face, detected by a face detecting section, to be a local region, which is a part of a shadowless background region. An extraction executing section extracts regions adjacent to the local region and constituted by pixels of a similar color to that of the local region, as the shadowless background region. A shadow region extracting section extracts a region adjacent to the shadowless background region and constituted by pixels, of which: differences in hue and saturation from the average hue and the average saturation of the local region are within predetermined threshold values; the brightness is lower than the average brightness of the local region; and the difference in the brightnesses exceeds a predetermined threshold value, as a shadow region. A correcting section corrects the brightness of the shadow region to match that of the local region, to remove a shadow.
25 Citations
23 Claims
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1. An image processing apparatus for removing shadows of a main subject, from a photographic image in which the shadows are present within a background having a simple pattern, comprising:
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shadowless background region extracting means for extracting a shadowless background region, in which the shadows are not present, from the photographic image;
shadow region extracting means for extracting a shadow region, from regions within the photographic image other than the shadowless background region; and
correcting means, for removing the shadows from the photographic image, by adjusting pixel values of the shadowless background region and/or the shadow region. - View Dependent Claims (2, 4, 5, 7, 8, 10, 11, 13, 14)
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3. An image processing apparatus for removing shadows of a main subject, from a photographic image in which the shadows are present within a background having a simple pattern, comprising:
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background region extracting means for extracting a background region, in which the shadows are present, from the photographic image;
shadow region extracting means for separating the extracted background region with shadows therein into a shadowless background region without shadows therein and a shadow region, in which the shadows are present; and
correcting means, for removing the shadows from the photographic image, by adjusting pixel values of the shadowless background region and/or the shadow region. - View Dependent Claims (6, 9, 12, 15)
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16. A program that causes a computer to execute image processing for removing shadows of a main subject, from a photographic image in which the shadows are present within a background having a simple pattern, comprising the procedures of:
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extracting a shadowless background region, in which the shadows are not present, from the photographic image;
extracting a shadow region, from regions within the photographic image other than the shadowless background region; and
removing the shadows from the photographic image, by adjusting pixel values of the shadowless background region and/or the shadow region. - View Dependent Claims (17)
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18. A program that causes a computer to execute image processing for removing shadows of a main subject, from a photographic image in which the shadows are present within a background having a simple pattern, comprising the procedures of:
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extracting a background region, in which the shadows are present, from the photographic image;
separating the extracted background region with shadows therein into a background without shadows therein and a shadow region, in which the shadows are present; and
removing the shadows from the photographic image, by adjusting pixel values of the shadowless background region and/or the shadow region.
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19. An image processing apparatus for detecting shadows of a main subject, from a photographic image in which the shadows are present within a background having a simple pattern, comprising:
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shadowless background region extracting means for extracting a shadowless background region, in which the shadows are not present, from the photographic image; and
shadow region extracting means for extracting a shadow region, from regions within the photographic image other than the shadowless background region.
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20. An image processing apparatus for detecting shadows of a main subject, from a photographic image in which the shadows are present within a background having a simple pattern, comprising:
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background region extracting means for extracting a background region, in which the shadows are present, from the photographic image; and
shadow region extracting means for separating the extracted background region with shadows therein into a shadowless background region without shadows therein and a shadow region, in which the shadows are present.
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21. A computer readable recording medium, in which a program that causes a computer to execute image processing for removing shadows of a main subject, from a photographic image in which the shadows are present within a background having a simple pattern, the program comprising the procedures of:
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extracting a shadowless background region, in which the shadows are not present, from the photographic image;
extracting a shadow region, from regions within the photographic image other than the shadowless background region; and
removing the shadows from the photographic image, by adjusting pixel values of the shadowless background region and/or the shadow region. - View Dependent Claims (22)
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23. A computer readable recording medium, in which a program that causes a computer to execute image processing for removing shadows of a main subject, from a photographic image in which the shadows are present within a background having a simple pattern, the program comprising the procedures of:
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extracting a background region, in which the shadows are present, from the photographic image;
separating the extracted background region with shadows therein into a background without shadows therein and a shadow region, in which the shadows are present; and
removing the shadows from the photographic image, by adjusting pixel values of the shadowless background region and/or the shadow region.
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Specification