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US 2011/0216220 A1Published application
Image processing device and image processing method thereof
AssigneeHon Hai Precision Industry Co., Ltd.
InventorsHUNG-YUAN CHIANG, HO-CHUN YEN
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Abstract
An image processing device and an image processing method determine whether the photographic scene has a high luminance difference. If the photographic scene has a high luminance difference, the image processing device and method switch the image pickup unit to a high luminance difference exposure mode. If the photographic scene does not have a high luminance difference, the image processing device and method switch the image pickup unit to a normal exposure mode.
Claims13
An image processing method, comprising:
- (a) obtaining a preview image of a photographic scene and a luminance of each pixel of the preview image;
- (b) calculating a frequency of each luminance of the preview image based on the luminance of each pixel of the preview image;
- (c) grouping each pixel into a high luminance group or a low luminance group based on the frequency of each luminance of the preview image, obtaining a central luminance of the high luminance group and a central luminance of the low luminance group, and calculating an absolute difference between the central luminance of the high luminance group and the central luminance of the low luminance group;
- (d) determining whether the photographic scene has a high luminance difference by comparing the absolute difference with a predetermined value;
- and
- (e) if the photographic scene has a high luminance difference, switching the image pickup unit to a high luminance difference exposure mode;
- if the photographic scene does not have a high luminance difference, switching the image pickup unit to a normal exposure mode.
4 more elements
An image processing device, comprising:
- an image pickup unit for obtaining a preview image of a photographic scene and a luminance of each pixel of the preview image;
- a first calculating unit configured for calculating a frequency of each luminance of the preview image based on the luminance of each pixel of the preview image;
- a second calculating unit for grouping each pixel into a high luminance group or a low luminance group based on the frequency of each luminance of the preview image, obtaining a central luminance of the high luminance group and a central luminance of the low luminance group, and calculating an absolute difference between the central luminance of the high luminance group and the central luminance of the low luminance group;
- a determining unit for determining whether the photographic scene has a high luminance difference by comparing the absolute difference with a predetermined value;
- and
- a control unit for switching the image pickup unit to a high luminance difference exposure mode if the photographic scene has a high luminance difference, and switching the image pickup unit to a normal exposure mode if the photographic scene does not have a high luminance difference.
3 more elements
Dependencies are inferred from the claim text.