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Method and device for generating images with high dynamic ranges

A high dynamic range, low dynamic range technology, applied in the field of image processing, can solve the problem of "ghosting" and other problems that cannot be eliminated in high dynamic range images

Active Publication Date: 2015-02-11
HUAWEI DEVICE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The present invention provides a method and device for generating high dynamic range images, which are used to solve the problem in the prior art that when objects move fast or in some relatively complex moving scenes, only relying on probability weighting cannot eliminate high dynamic range. The technical problem of "ghosting" in the image has achieved the technical effect of eliminating the "ghosting" in the high dynamic range image

Method used

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  • Method and device for generating images with high dynamic ranges
  • Method and device for generating images with high dynamic ranges

Examples

Experimental program
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Embodiment 1

[0069] An embodiment of the present invention provides a method for generating a high dynamic range image, such as figure 2 As shown, the method includes:

[0070] Step 201: For an image acquisition area, obtain N frames of LDR images with different exposures, where N is an integer greater than or equal to 2.

[0071] In this embodiment, the above-mentioned N frames of LDR images with different exposures can be obtained by the image acquisition device on the electronic equipment device that generates the high dynamic range image, for example, first by the CCD, CMOS and other photosensitive elements set in the camera on the mobile phone Obtain image signals, and then transmit these image signals to an image signal processor (ISP, Image Signal Processor), and the ISP preprocesses the image signals to generate the above N frames of LDR images, and then transmit the N frames of LDR images to The device (such as a processor) that generates HDR images on the mobile phone processes...

Embodiment 2

[0176] Based on the same design idea, the embodiment of the present invention also provides a device for generating high dynamic range images, please refer to Figure 8 , the device includes: an LDR image acquisition module 801, used to obtain N frames of LDR images with different exposures for an image acquisition area, wherein, N is an integer greater than or equal to 2; a reference image determination module 802, used to convert N frames One frame of LDR image in the LDR image is determined as a reference image; the motion area determination module 803 is used to determine the motion area of ​​each frame of image in K frames of LDR images in the remaining N-1 frames of LDR images, wherein K is greater than 0 and an integer less than or equal to N-1; the image correction module 804 is used to correct the motion area of ​​each frame image in the K frame LDR image based on the reference image, and generates K frame correction images; the HDR image generation module 805 uses Pe...

Embodiment 3

[0196] An embodiment of the present invention provides a terminal 90, and the terminal 90 may be a mobile phone, a tablet computer, a SLR camera, a notebook computer, and the like.

[0197] Figure 9 What is shown is a schematic structural diagram of a terminal 90 according to an embodiment of the present invention.

[0198] Please refer to Figure 9 , the terminal 90 includes: a memory 901 and a processor 902, the memory 901 is used to store N frames of LDR images with different exposures for an image acquisition area, where N is an integer greater than or equal to 2; the processor 902, and The memory 901 is connected to obtain the N frames of LDR images stored in the above memory 901; determine one frame of the LDR image in the N frames of LDR images as a reference image; in the remaining N-1 frames of LDR images, determine the K frames of the LDR image The motion area of ​​each frame image, wherein, K is an integer greater than 0 and less than or equal to N-1; Based on th...

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Abstract

A method and apparatus for generating a high dynamic range image are disclosed by the present invention, which is used to remove "ghost" in the high dynamic range image. The method includes: for an image collecting area, obtaining N-frame low dynamic range images which have different exposure, wherein, N is an integer greater than or equal to 2; determining one frame low dynamic range image of the N-frame low dynamic range images as a reference image; in remaining N-1 frame low dynamic range images , determining a motion area of each frame image of K-frame low dynamic range images, wherein, K is an integer greater than 0 and less than or equal to N-1; based on the reference image, correcting the motion area of each frame image of the K-frame low dynamic range images, and generating K-frame corrected images; fusing the reference image and the K-frame corrected images, then generating one frame high dynamic range image.

Description

technical field [0001] The invention relates to the technical field of image processing, in particular to a method and a device for generating high dynamic range images. Background technique [0002] With the development of computer technology, due to the limitation of hardware conditions of electronic devices such as smartphones, feature phones, and tablet computers, the images captured by the image acquisition device and the images captured by the SLR camera have a high dynamic range (HDR, High Dynamic Range) There is a huge gap. In order to improve the image quality of captured images, electronic equipment adopts HDR technology, that is, multiple low dynamic range (LDR, Low Dynamic Range) images captured by an image acquisition device are combined into one HDR image. As the performance of embedded processors in electronic devices continues to improve, electronic devices can generate high-quality images using HDR technology within a response time acceptable to users. [...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N5/235H04N5/355H04N9/04
CPCG06T5/00G06T2207/20208G06T5/94
Inventor 陈刚罗巍朱聪超
Owner HUAWEI DEVICE CO LTD
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