Aerial camera multi-exposure image fusion method

An image fusion, aerial camera technology, applied in image communication, TV, color TV components and other directions, can solve the problems of incomplete image information, improper exposure, etc., to achieve the effect of reducing the required time

Active Publication Date: 2017-02-01
CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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  • Abstract
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Problems solved by technology

[0006] In view of this, the present invention provides a multi-exposure image fusion method for aerial cameras, which can solve the problem of incomplete image information caused by improper exposure of existing aerial cameras during the imaging process of high dynamic scenes

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  • Aerial camera multi-exposure image fusion method

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Embodiment Construction

[0033] The present invention will be described in detail below with reference to the accompanying drawings and examples.

[0034] The invention provides a multi-exposure image fusion method of an aerial camera, which uses double-number complex wavelet transform to process and fuse the multi-exposure images.

[0035] The dual-number complex wavelet transform adopts the binary tree method, realizes complex wavelet transform with real-number wavelet transform, decomposes the image into high-frequency part and low-frequency part, and can reflect the image in the direction of ±15°, ±45°, ±75° The details of the information, while having the characteristics of translation invariance, direction selectivity and limited data redundancy. The dual-number complex wavelet transform is used for image fusion, and the high-frequency information and low-frequency information are processed separately, which can take into account the information on different scales of the image and provide a gua...

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Abstract

The invention discloses an aerial camera multi-exposure image fusion method. By using the aerial camera multi-exposure image fusion method, the problem of incomplete image information caused by improper exposure of an existing aerial camera in a high-dynamic scene imaging process can be solved. According to the aerial camera multi-exposure image fusion method disclosed by the invention, three images which respectively have high brightness, intermediate brightness and low brightness are selected from a multi-exposure sequence and are directly fused, and exposure time of the images do not need to be known, so that a tedious and time-consuming step of calibrating a camera response function in a conventional high-dynamic imaging technology is avoided, and required time is greatly reduced; the images are decomposed into high-frequency components and low-frequency components by adopting an exposure fusion method based on dual-tree complex wavelet transform, and according to features of the high-frequency components and the low-frequency components, different fusion modes are adopted, so that the obtained image has relatively good performance in both aspects of overall brightness and detail preserving.

Description

technical field [0001] The invention relates to the technical fields of digital image processing and machine vision, in particular to an aerial camera multi-exposure image fusion method. Background technique [0002] In the detection process of the modern aerial imaging detection system, the dynamic range of the scene is large, limited by the dynamic range of the camera CCD, it is difficult to present all the information in the scene in one image. By adjusting the aperture and shutter of the camera, the exposure focus can only be locked on a part of the scene, and it cannot be guaranteed that all areas in the scene are exposed accurately. In this way, some information in the scene will be lost during the imaging process. posed difficulties. [0003] At present, high dynamic range imaging technology is widely used. High dynamic range imaging technology obtains a series of images with different exposures by exposing the same scene multiple times, and then analyzes the images...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N5/235
CPCH04N23/741
Inventor 刘晶红申小禾王宣宋悦铭孙明超楚广生
Owner CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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