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Automatic focusing method, and automatic focusing device and image capturing device using the same

一种自动对焦、提取装置的技术，应用在图像通信、电视、彩色电视的零部件等方向，能够解决自动对焦的速度不够快速、累积致动器移动公差等问题，达到减少对焦步数、减少累积公差、易于实现的效果

Active Publication Date: 2015-06-03
LITE ON TECH CORP
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above-mentioned traditional autofocus method needs to extract eight images in this example, so its autofocus speed is still not fast enough
On the other hand, since the above-mentioned traditional autofocus method needs to move the lens many times, the process of autofocus may accumulate the movement tolerance of the actuator

Method used

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  • Automatic focusing method, and automatic focusing device and image capturing device using the same
  • Automatic focusing method, and automatic focusing device and image capturing device using the same
  • Automatic focusing method, and automatic focusing device and image capturing device using the same

Examples

Experimental program
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Embodiment Construction

[0039] An embodiment of the present invention provides an auto-focus method, and the auto-focus method is applicable to an image capture device with multiple cameras. The autofocus method extracts the shooting scene through multiple cameras, thereby obtaining multiple images generated by the multiple cameras, wherein the shooting scene may have a single or multiple scenes, and the scenes may include objects or backgrounds, such as people, animals, Landmarks, trees, clouds, mountains or waterfalls etc. Next, the autofocus method uses the multiple images to generate multiple depth maps, wherein each depth map is generated by any two images, and each depth map can have the single scene or the multiple scenes Depth information of at least one of them (if the two images forming the depth map have the single scene or the same at least one of the multiple scenes) or may not have the single scene or the multiple Depth information of at least one of the scenes (if the two images formi...

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Abstract

The present invention illustrates an automatic focusing method. Firstly, through multiple cameras of an image capturing device, a scene is captured, such that multiple images generated corresponding to the cameras are obtained. Then, multiple depth maps are generated according to the images. Next, according to the resolutions of single one or multiple objects in the depth maps, the depth information of the single one or multiple objects in the depth maps can be selected to generate a merged depth map. Then, a target focus distance of the single one object or target focus distances of multiple objects are calculated according to the merged depth map. Next, an actual focus distance of the multi-lenses module associated with the cameras is adjusted according to the target focus distance of the single one object or one of the multiple objects.

Description

technical field [0001] The present invention relates to an image capture device, and in particular to an auto-focus method for an image capture device with multiple cameras, and an auto-focus device and an image capture device using the above-mentioned auto-focus method. Background technique [0002] Most of the current image capture devices are digital image capture devices. The advantage is that they can automatically find the focus distance with the assistance of at least one of software, hardware and firmware, so that the photographer can shoot clear scenes. Please refer to figure 1 , figure 1 It is a graph of the focus measurement value and the moving step index value after each lens movement in the traditional autofocus method for a single-lens image capture device. Traditional autofocus methods for single-lens image capture devices move the lens incrementally to adjust the lens focus distance and obtain corresponding focus measurements, such as image contrast or sha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N5/232
CPCH04N13/243H04N13/271H04N23/55H04N23/67
Inventor 陈昭宇黄志雄
Owner LITE ON TECH CORP
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