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Method and device for enhancing image

A technology in images and images, applied in the field of image processing, can solve problems affecting the visual effect of the resulting image, unreliable, unstable results, etc., and achieve natural and acceptable visual effects and convenient control

Inactive Publication Date: 2015-02-11
NOKIA TECH OY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, images processed by this method often contain a lot of noise and are unstable
For example, a scaly visual effect can be produced in areas where defogging and delighting are performed, which incorrectly introduces noise during image enhancement
This phenomenon can be called "over-removal", which makes the result of image enhancement unstable, unreliable, and affects the visual quality of the resulting image

Method used

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  • Method and device for enhancing image

Examples

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Embodiment Construction

[0019] The principle and spirit of the present invention will be described below with reference to several exemplary embodiments shown in the accompanying drawings. It should be understood that these embodiments are described only to enable those skilled in the art to better understand and implement the present invention, and do not limit the scope of the present invention in any way.

[0020] Referring first to FIG. 1 , it shows a flowchart of a method 100 for enhancing an image according to an exemplary embodiment of the present invention. Note that in the context of this application, the term "image" may be a static image or an image (ie, a frame) in a moving picture (eg, video). Images may be acquired using any suitable capture device / means, and may be stored and processed in any suitable format, as the scope of the invention is not limited in this respect.

[0021] As shown, after the method 100 starts, the unsharpness of the processed image is estimated at step S101. T...

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PUM

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Abstract

Embodiments of the present invention relate to a method and apparatus for image enhancement. In particular, there is provided a method for image enhancement, the method comprising: estimating unsharpness of the image (S201 -S204); determining a protection level of at least one pixel in the image based on the unsharpness (S205); and modifying a value of the at least one pixel to enhance the image, an amount of the modifying being determined at least in part based on the protection level (S206-S210). A corresponding apparatus and user device are disclosed. The invention may be applied to fog or haze removal from images or video without producing over-removal artifacts. In some embodiments, the invention may also be used to remove noise from low-light images.

Description

technical field [0001] Embodiments of the present invention relate to image processing technologies, and more particularly, to methods and devices for image enhancement. Background technique [0002] Image capture and processing technologies have developed and advanced significantly over the past few years. Currently, image capture devices such as cameras and video cameras can be integrally integrated in various computing devices such as mobile phones, personal digital assistants (PDAs), tablet computers, laptop computers, and the like. In current image capture and processing technologies, a major challenge comes from the influence of shooting environment on image quality. For example, in a low-light environment or a foggy natural environment, the quality of the captured image will usually be significantly degraded, such as blurring of the scene in the image and so on. [0003] To alleviate this problem, several solutions have been proposed. For example, it has been propo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T5/00G06V10/30G06V10/44G06V10/60G06V20/40
CPCH04N5/357G06K9/40G06T5/50G06T5/00H04N5/21G06T5/75G06T5/70G06T5/20G06T2207/20224
Inventor 李江伟阎贺汪孔桥
Owner NOKIA TECH OY
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