A method and device for eliminating sequential image noise

A noise elimination and sequence image technology, applied in the field of image processing, can solve the problems of high system cost and inconspicuous noise elimination effect, and achieve the effect of reducing cost, maintaining clarity, and eliminating noise

Active Publication Date: 2008-09-10
中星智能系统技术有限公司
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[0006] In view of this, the embodiment of the present invention provides a method for eliminating noise in sequential i

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  • A method and device for eliminating sequential image noise
  • A method and device for eliminating sequential image noise
  • A method and device for eliminating sequential image noise

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Embodiment Construction

[0030] In the embodiment of the present invention, noise estimation is performed on the current frame image generated by the imaging device in the imaging device, wherein the imaging device includes: CMOS (Complementary Metal-Oxide-Semiconductor, complementary metal oxide semiconductor) image sensor, CCD (Charge Coupled Device, charge-coupled device) image sensor, and then according to the size of the noise estimation value, determine whether to perform noise elimination in the spatial domain on the frame image, and whether to perform joint noise elimination in the spatial domain and time domain on the frame image, and determine whether to perform noise elimination in the frame image Parameters when the image is denoised in the space domain or / and time domain, and then the corresponding operation is performed on the frame image, and then the image post-processing is performed on the frame image. In this way, different noise elimination is performed for frames with different noi...

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Abstract

The invention discloses a method for eliminating noise of a sequence image and a device thereof, aiming at solving the problems that noise elimination effect is not obvious or the system cost is high in the prior art. The method comprises the steps that noise estimation to the Nth frame image of an input image sequence is firstly carried out to obtain the noise estimation value of the frame image, then spatial domain noise elimination is carried out to the Nth frame image according to the spatial information of the Nth frame image of the input image sequence when the noise estimation value is determined to be more than a given noise minimum, and time domain noise elimination is carried out to the Nth frame image of the intra-frame noise elimination image sequence to obtain the Nth frame image of an output image sequence according to the time information of the frame image when the noise estimation value is determined to be more than a given inter-frame threshold. By adopting the technical proposal provided by the invention, not only the noise of the image can be effectively eliminated, but also the system cost can be reduced and the clarity of the image can be maintained as well.

Description

technical field [0001] The present invention relates to the technical field of image processing, in particular to a method and device for eliminating noise in sequence images. Background technique [0002] In camera and monitoring systems, it is always desirable to obtain images with as little noise as possible, but due to the sensitivity and dynamic range of photosensitive devices, as well as changes in illumination in the actual environment, noise always exists in the obtained images, resulting in clear images. The degree decreases, affecting the subsequent processing and application of the image. At present, there are mainly two noise elimination methods applied in camera and monitoring systems. One is to use intra-frame information in the camera device to reduce or eliminate noise, and the other is to add an additional denoising processing chip to reduce or eliminate noise. . [0003] Method 1, the method of using intra-frame information to reduce or eliminate noise in...

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Application Information

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IPC IPC(8): H04N5/217G06T5/00
Inventor 邱嵩梅大为汪源俞青邓中翰
Owner 中星智能系统技术有限公司
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