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US 10,257,405 B2Granted
Automatic focusing method and automatic focusing system
AssigneeNanning Fugui Precision Industrial Co., Ltd.
InventorsPi-Lun Cheng, Hsuan-Kuei Huang
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Abstract
An automatic focus method includes: catching an image data in a focus area; calculating the image data to get a contrast value curve via a contrast value algorithm; obtaining a contrast weight of each contrast value; calculating an adapted contrast value by multiplying the contrast value to the contrast weight; and adapting the focus according to the adapted contrast value curve. An automatic focus system using the automatic focus method is further disclosed.
Claims8
An automatic focusing method comprising:
- acquiring an image data in a focus area;
- calculating the image data to get a contrast value curve by a contrast value algorithm;
- acquiring a contrast weight of each contrast value, wherein acquiring a contrast weight of each contrast value comprising:
- determining whether the focus area is a skin area;
- decreasing contrast weight corresponding to the non-skin area;
- determining whether the skin area is integrated;
- increasing contrast weight corresponding to the integrated skin area;
- determining whether the non-integrated skin area accords with human feature;
- increasing the corresponding contrast weight when the non-integrated skin area accords with human feature;
- decreasing the corresponding contrast weight when the non-integrated skin area does not accord with human feature;
- calculating an adapted contrast value by multiplying the contrast value to the contrast weight;
- and
- adapting the focus according to the adapted contrast value curve.
10 more elements
An automatic focusing system comprising:
- an image acquiring module, configured to acquire an image data in a focus area;
- and
- a processor comprising:
- a calculating module, configured to calculate the image data to get a contrast value curve by a contrast value algorithm;
- a weight acquiring module, configured to acquire a contrast weight of each contrast value, wherein the weight acquiring module comprising:
- a skin area confirming module, configured to determine whether the focus area is a skin area;
- a weight adjusting module, configured to decrease contrast weights corresponding to the non-skin area;
- a skin integrity confirming module, configured to determine whether the skin area is integrated;
- a human feature confirming module, configured to determining whether the non-integrated skin area accords with human feature, wherein the weight adjusting module is further configured to increase contrast weights corresponding to the integrated skin area;
- increase the corresponding contrast weights when the non-integrated skin area accords with human feature;
- and decrease the corresponding contrast weights when the non-integrated skin area does not accord with human feature;
- a revising module, configured to calculate an adapted contrast value by multiplying the contrast value to the contrast weight;
- and
- an adjusting module, configured to adapt the focus according to the adapted contrast value curve.
11 more elements
Dependencies are inferred from the claim text.