Exposure fusion method in consideration of brightness distribution and detail presentation

A technology of brightness distribution and fusion method, applied in image analysis, image data processing, instruments, etc., can solve the problem that LDR imaging devices and display devices cannot capture and present HDR targets, avoid brightness inversion defects, and reduce time costs , the effect of simple operation

Active Publication Date: 2017-07-04
CHONGQING UNIV OF POSTS & TELECOMM
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Problems solved by technology

Based on multi-exposure and image fusion technology, it effectively solves the problem that LDR imaging devices and display devices

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  • Exposure fusion method in consideration of brightness distribution and detail presentation
  • Exposure fusion method in consideration of brightness distribution and detail presentation
  • Exposure fusion method in consideration of brightness distribution and detail presentation

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Embodiment Construction

[0022] In order to make the object, technical solution and advantages of the present invention clearer, the embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0023] An exposure fusion method that takes into account both brightness distribution and detail presentation proposed by the present invention follows the general route of exposure fusion technology, for example, Mertens T, Kautz J, Reeth F V. Exposure Fusion[C] / / Conference onComputer Graphics&Applications.IEEEComputer Society ,2007:382-390), first calculate the weight function based on multiple LDR images, which is used to measure the proportion of the features in the input image integrated into the output image, and then perform direct weighted addition on the input image sequence according to the weight function, and output An LDR image that conforms to human vision and presents an HDR target scene can be used for subsequent operations such a...

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Abstract

The invention relates to the field of computer image high-dynamic-range imaging technology, and provides an exposure fusion method in consideration of brightness distribution and detail presentation. The method comprises the steps of decomposing a low-dynamic-range multiple-exposure-image sequence into a Lab color space, and obtaining a brightness sequence and a color sequence; calculating a brightness global weight function according to the brightness sequence; segmenting the brightness sequence on a line number and row number plane for obtaining a plurality of sub-pixel calculating units, and obtaining a brightness detail weight function, segmenting the color sequence on the line number and row number plane for obtaining a plurality of sub-pixel calculating units, and obtaining a color detail weight function; performing weighted summation on the brightness sequence by means of the brightness global weight function and the brightness detail weight function; and performing weighted summation on the color sequence by means of the color detail weight function for obtaining a fused color component. The exposure fusion method realizes single high-dynamic-range quick imaging from a plurality of low-dynamic-range images and furthermore satisfies a requirement for brightness distribution and detail presentation.

Description

technical field [0001] The invention relates to the technical field of computer image high dynamic range imaging, in particular to an exposure fusion method that takes into account brightness distribution and detail presentation. Background technique [0002] In a digital imaging system, the imaging device converts the received optical signal into an electrical signal, and then digitizes it to form a digital image. However, since the irradiance range of natural scenes is much larger than the dynamic range of imaging devices, high dynamic range imaging technology has been developed so that natural scenes with high dynamic range can be effectively recorded. [0003] High dynamic range imaging technology can be realized through two technical approaches: imaging devices and digital images. The former is based on digital circuit technology, which broadens the photoelectric response range of the imaging device and outputs the target irradiance with a higher digital signal. Howeve...

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Application Information

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IPC IPC(8): G06T5/00G06T5/50
CPCG06T5/009G06T5/50G06T2207/20221
Inventor 陈阔熊仕勇
Owner CHONGQING UNIV OF POSTS & TELECOMM
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