Automatic focusing method and system, and shooting device

An autofocus and imaging device technology, applied in the field of imaging, can solve the problems of increased manufacturing cost, slow focusing speed, and autofocus technology not suitable for front cameras, etc., to achieve the effect of increasing manufacturing cost and fast focusing speed

Active Publication Date: 2016-12-21
GUANGDONG OPPO MOBILE TELECOMM CORP LTD
View PDF5 Cites 13 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, contrast focusing is carried out in the main sensor CMOS in the shooting device, and the focus point can be set arbitrarily within a wide range, but the focus speed is slow; PADF phase focus calculates the object distance based on the phase difference between the left and right pixels. Then convert the object distance into a current signal that drives the focus motor to move, but PADF phase focusing will sacrifice some pixels of the image sensor (these pixels are called masked pixels, or Mas

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Automatic focusing method and system, and shooting device
  • Automatic focusing method and system, and shooting device
  • Automatic focusing method and system, and shooting device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0024] The content of the present invention will be further described in detail below in conjunction with preferred embodiments and accompanying drawings. Apparently, the embodiments described below are only used to explain the present invention, not to limit the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention. It should be noted that the photographing device described in the embodiment of the present invention may include a PDA (Personal Digital Assistant, personal digital assistant), a mobile phone, a tablet and other devices capable of photographing. In addition, it should be noted that, for the convenience of description, only parts related to the present invention are shown in the drawings but not all content.

[0025] figure 1 It is a schematic flowchart of the autofocus method in an embodim...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention relates to an automatic focusing method and system, and a shooting device. The method comprises: a preview image generated by an imaging device is obtained; face identification is carried out on the preview image, a face contour feature frame is determined, and dimension information of the face contour feature frame is obtained; and according to the dimension information of the face contour feature frame, a preset object distance, a reference dimension information of the face contour feature frame, and a preset correction coefficient, a current object distance is determined, and automatic focusing is carried out based on the current object distance. According to the invention, an object distance can be calculated rapidly and automatic focusing is carried out; the focusing speed is fast; sacrifice of masked pixels as well as manufacturing cost increasing can be avoided; and the using requirement of the front camera is met.

Description

technical field [0001] The invention relates to the field of imaging technology, in particular to an autofocus method and system, and a photographing device. Background technique [0002] Generally speaking, the auto-focus technology means that the shooting device will move the lens to change the distance between the lens and the object to be photographed, so as to obtain the subject image with maximum clarity. [0003] Existing mobile devices, such as smart phones, are equipped with a front camera and a rear camera. The front camera is often used for self-portraits, but the front cameras of mobile devices on the market use fixed focus due to various reasons. Autofocus cannot be achieved. Commonly used autofocus technologies for rear cameras include contrast detection focusing, PDAF phase focusing, and infrared focusing. Among them, contrast focusing is carried out in the main sensor CMOS in the shooting device, and the focus point can be set arbitrarily within a wide rang...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): G03B13/36G02B7/28H04N5/232
CPCG02B7/28G03B13/36H04N23/67H04N23/611
Inventor 朱正江
Owner GUANGDONG OPPO MOBILE TELECOMM CORP LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap