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Digital zoom method, system, electronic device, medium and digital imaging device

A digital zoom and image technology, applied in the field of image processing, can solve problems such as limited digital zoom capability, and achieve the effects of strong digital zoom capability, good image quality, and good image resolution

Active Publication Date: 2021-07-02
SPREADTRUM COMM (SHANGHAI) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to provide a digital zoom method, system, electronic device, storage medium and digital imaging device in order to overcome the defect of limited digital zoom capability in the prior art

Method used

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  • Digital zoom method, system, electronic device, medium and digital imaging device
  • Digital zoom method, system, electronic device, medium and digital imaging device
  • Digital zoom method, system, electronic device, medium and digital imaging device

Examples

Experimental program
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Effect test

Embodiment 1

[0086] This embodiment provides a digital zoom method, referring to figure 1 , the digital zooming method of the present embodiment comprises:

[0087] S101. Continuously acquire multiple frames of original images according to the zoom instruction;

[0088] S102. Crop each frame of the original image according to the zoom ratio to obtain the region of interest;

[0089] S103. Upsampling the region of interest in multiple frames to obtain a first intermediate image;

[0090] S104. Perform super-resolution reconstruction on multiple frames of first intermediate images to obtain a zoomed image.

[0091] In this embodiment, the zoom instruction includes a zoom ratio, wherein the minimum value of the zoom ratio is 1, and the device that acquires multiple frames of original images according to the zoom instruction may be, for example, a digital imaging device, and the multi-frame original images acquired according to the zoom instruction may be It is an image captured by digital ...

Embodiment 2

[0125] On the basis of Embodiment 1, this embodiment provides a digital zoom method, refer to Figure 5 , the digital zoom method of this embodiment may also include after step S102:

[0126] S201. Determine whether the zoom ratio is smaller than a preset threshold;

[0127] If yes, execute step S202; if not, execute step S105;

[0128] S202. Upsampling the region of interest in multiple frames to obtain a second intermediate image;

[0129] S203. Fusion multiple frames of second intermediate images to obtain a zoomed image.

[0130] Specifically, in this embodiment, in order to make full use of super-resolution reconstruction to improve the digital zoom capability, the zoom magnification can be segmented, so that the zoom magnification can be divided into two zoom segments: a digital interpolation zoom segment and a super-resolution zoom segment, Wherein, the preset threshold can be customized according to the actual application, for example, the preset threshold can be 2....

Embodiment 3

[0135] This embodiment provides a digital zoom system, referring to Figure 6 , the digital zoom system of the present embodiment includes:

[0136] The first acquisition module 301 is configured to continuously acquire multiple frames of original images according to the zoom instruction;

[0137] Cutting module 302, for cutting each frame of original image according to the zoom factor to obtain the region of interest;

[0138] The first up-sampling module 303 is configured to up-sample the region of interest of multiple frames to obtain a first intermediate image;

[0139] The super-resolution reconstruction module 304 is configured to perform super-resolution reconstruction on multiple frames of first intermediate images to obtain zoomed images.

[0140] In this embodiment, the zoom instruction includes a zoom ratio, wherein the minimum value of the zoom ratio is 1, and the device that acquires multiple frames of original images according to the zoom instruction may be, fo...

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Abstract

The invention discloses a digital zoom method, system, electronic equipment, medium and digital imaging equipment. Wherein, the digital zooming method includes: continuously acquiring multiple frames of original images according to a zoom instruction, the zoom instruction including a zoom ratio; cutting out each frame of the original image according to the zoom ratio to obtain a region of interest; and performing upsampling on the region of interest of multiple frames to obtain a first intermediate image; performing super-resolution reconstruction on multiple frames of the first intermediate image to obtain a zoomed image. The present invention continuously acquires multi-frame original images according to the zoom command, and sequentially performs cropping, up-sampling and super-resolution reconstruction on the acquired multi-frame original images to obtain zoomed images. By zooming, better image resolution and better image quality can be obtained, thus, the present invention can realize a stronger digital zoom capability.

Description

technical field [0001] The invention relates to the technical field of image processing, in particular to a digital zoom method, system, electronic equipment, storage medium and digital imaging equipment. Background technique [0002] Zooming refers to the change of the focal length of the imaging lens, which is visually manifested as zooming in or zooming out of the imaged object, and also reflected in the enlargement or reduction of the image of the object. The zoom capability is a very important indicator of the imaging device, which determines the shooting breadth and depth of the camera device. Zooming can be divided into two types: optical zooming and digital zooming. Optical zooming is the most traditional zooming method, which uses different combinations of concave lenses and convex lenses to change the focal length. Digital zoom, also known as digital zoom, is realized through cropping and interpolation algorithms, and belongs to the category of image processing. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N5/232
CPCH04N23/67
Inventor 冯召东蒋彬陈欢
Owner SPREADTRUM COMM (SHANGHAI) CO LTD