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A noise reduction method and device for photographed images

A noise reduction and image technology, applied in the field of noise reduction methods and devices for photographed images, can solve problems such as excessive noise suppression, low photo clarity, and affecting user experience, so as to improve the photographing effect, optimize the noise reduction technology, high definition effect

Active Publication Date: 2018-05-15
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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  • A noise reduction method and device for photographed images
  • A noise reduction method and device for photographed images
  • A noise reduction method and device for photographed images

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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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Abstract

The embodiment of the present invention discloses a noise reduction method and device for photographed images. The method includes: determining the corresponding noise reduction coefficient according to the current sensitivity value; performing noise reduction on the photographed image according to the noise reduction coefficient; outputting the noise reduction coefficient After the said photographed image. The technical solution provided by the embodiment of the present invention, by determining the corresponding noise reduction coefficient according to the sensitivity value, and using the technical means to reduce the noise of the photographed image according to the noise reduction coefficient, solves the problem in the prior art when the photographing environment is relatively bright. At the same time, the technical problem of blurred picture caused by using a relatively large noise reduction coefficient for noise reduction according to the existing technology ensures that the photographed image can reach a higher definition, and optimizes the existing noise reduction technology of the photographed image. It satisfies people's increasing demand for noise reduction of personalized and convenient photographed images.

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 Patents(China)
IPC IPC(8): H04N5/217
Inventor 李小朋
Owner GUANGDONG OPPO MOBILE TELECOMM CORP LTD