Denoising method and device for photographed image

A technology for noise reduction and image reduction, which is applied in the field of noise reduction methods and devices for photographed images, which can solve problems such as excessive noise suppression, low photo clarity, and impact on user experience, and achieve improved photographic effects, high definition, and optimized The effect of noise reduction technology

Active Publication Date: 2016-02-03
GUANGDONG OPPO MOBILE TELECOMM CORP LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

figure 1 A schematic diagram of the photographed image after denoising in the prior art is given, such as figure 1 As shown, due to excessive noise suppression in bright scenes, useful image information is also suppressed to a large extent, resulting in poor overall photo effects and low-resolution photos, seriously affecting user experience

Method used

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  • Denoising method and device for photographed image
  • Denoising method and device for photographed image
  • Denoising method and device for photographed image

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Experimental program
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Effect test

Embodiment 1

[0022] figure 2 A flow chart of the method for noise reduction of photographed images provided by Embodiment 1 of the present invention is given. The method of this embodiment can be executed by a device for noise reduction of photographed images, which can be implemented by means of hardware and / or software, so The above device can be set inside the mobile terminal as a part of the mobile terminal with a camera function.

[0023] Such as figure 2 As shown, the noise reduction method for photographed images provided in this embodiment specifically includes the following steps:

[0024] Step 101. Determine a corresponding noise reduction coefficient according to the current sensitivity value.

[0025] In this embodiment, the application program for taking pictures built in the mobile terminal determines the corresponding noise reduction coefficient according to the current sensitivity value, wherein the mobile terminal can be a mobile phone, a notebook, a PAD smart terminal...

Embodiment 2

[0039] Figure 4 A flow chart of the noise reduction method for photographed images provided by Embodiment 2 of the present invention is given. This embodiment is optimized on the basis of the first embodiment above, and for details not described in detail in this embodiment, refer to the first embodiment above. In this embodiment, the specific optimization of determining the corresponding noise reduction coefficient according to the current sensitivity value is as follows: obtaining the current sensitivity value; judging whether the current sensitivity value is less than the set value; , the corresponding noise reduction coefficient is determined according to the current sensitivity value; when the current sensitivity value is greater than or equal to the set value, the noise reduction coefficient is determined as a preset value.

[0040] Correspondingly, such as Figure 4 As shown, the noise reduction method for photographed images provided in this embodiment specifically ...

Embodiment 3

[0062] Figure 5 A schematic structural diagram of the noise reduction device for photographed images provided by Embodiment 3 of the present invention is given. Such as Figure 5 As shown, the noise reduction device for photographed images provided in this embodiment includes:

[0063] A noise reduction coefficient determination unit 51, configured to determine a corresponding noise reduction coefficient according to the current sensitivity value;

[0064] A denoising unit 52, configured to denoise the photographed image according to the denoising coefficient;

[0065] The photographed image output unit 53 is configured to output the photographed image after noise reduction.

[0066] Optionally, the noise reduction coefficient determining unit is specifically used for:

[0067] When the current sensitivity value is less than the set value, determine the corresponding noise reduction coefficient according to the current sensitivity value;

[0068] When the current sensiti...

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PUM

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Abstract

Embodiments of the invention disclose a denoising method and device for a photographed image.The method comprises the following steps: determining a corresponding denoising coefficient according to a current sensitivity value; denoising the photographed image according to the denoising coefficient; and outputting the denoised photographed image. According to the denoising method and device in the technical scheme provided by the embodiments of the invention, the technical problem in the prior art than when a photographing environment is relatively bright, a relatively large denoising coefficient adopted in the prior art is stilled used for denoising to cause a fuzzy image, higher definition of the photographed image is guaranteed, the existing denoising technology of the photographed image is optimized, and the increasing individual and convenient denoising demands of people on the photographed image are satisfied.

Description

technical field [0001] Embodiments of the present invention relate to the technical field of image data processing, and in particular, to a noise reduction method and device for photographed images. Background technique [0002] With the continuous development of electronic technology, digital camera equipment (for example, digital camera or mobile phone with digital camera, etc.) has penetrated into thousands of households, and has become an indispensable tool for everyone to record beautiful natural scenery and engrave the wonderful moments of life. [0003] Noise, mainly refers to the rough part of the image produced when the photosensitive element of the digital camera device receives and outputs the light as a received signal, and also refers to the foreign pixels that should not appear in the image, which are usually generated by electronic interference. It's like the image is smudged with tiny grainy dots. [0004] At present, in order to further improve the quality ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N5/217
Inventor 李小朋
Owner GUANGDONG OPPO MOBILE TELECOMM CORP LTD
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