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Direction-aware autofocus

A technology of parameters and objects, which is applied in the field of automatic focusing of imaging devices, and can solve problems such as increased automatic focusing

Active Publication Date: 2019-12-13
QUALCOMM INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because of this, the rate of autofocus failures may increase, and the user may have an undesirable experience due to defocusing (instead of receiving crescendo focus) at the beginning of the autofocus search operation

Method used

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  • Direction-aware autofocus
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  • Direction-aware autofocus

Examples

Experimental program
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Embodiment Construction

[0031] In the following description, specific details are given to provide a thorough understanding of examples. However, it will be understood by those skilled in the art that the described examples may be practiced without these specific details. For example, electrical components / devices may be shown in block diagrams in order not to obscure the examples with unnecessary detail. In other examples, such components, other structures and techniques may be shown in detail to further explain the examples.

[0032] It should also be noted that the examples may be described as processes depicted as flowcharts, flow diagrams, finite state diagrams, structure diagrams, or block diagrams. Although a flowchart may describe operations as a sequential process, many operations may be performed in parallel or simultaneously, and the process may be repeated. Additionally, the order of operations may be rearranged. A process terminates when its operations are complete. A process may cor...

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PUM

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Abstract

The present invention discloses a method and an imaging device for determining a first direction to move a lens in an autofocus operation. For example, a method includes: capturing a plurality of frames depicting a scene; selecting a portion of at least one frame that corresponds to an object in the displayed frame; and tracking the object in the plurality of frames, wherein the tracked The object provides reference parameters of the object for each of the plurality of frames. The method may further include: detecting a change in the reference parameter at least between a first frame and a second frame of the plurality of frames; determining a focus direction based on the change in the reference parameter; and by The determined focus direction moves a lens of the imaging device to initiate a focus operation.

Description

technical field [0001] Embodiments of the present invention relate to imaging devices, and in particular, to methods and apparatus for autofocusing of imaging devices. Background technique [0002] The integration of digital processing technology and imaging devices has enabled more powerful and easier-to-use photographic products. For example, the ability to digitally control the shutter speed, aperture, and sensor sensitivity of an imaging device without requiring the photographer to manually determine and set these parameters for each environment has provided improved picture quality in a variety of imaging environments. [0003] Imaging devices with autofocus capabilities (their imaging devices and methods may simply be referred to herein as "autofocus") also make it easier to capture high-quality photographs, enabling almost any photographer regardless of skill Get sharp images in most imaging environments. Autofocus may also have reduced the workload of professional ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B7/28
CPCG02B7/28H04N23/673H04N23/675H04N23/61H04N23/632G06T7/74H04N23/611H04N23/62
Inventor 马磊邓帆陈良春
Owner QUALCOMM INC