Method for video enhancement and apparatus thereof

A video enhancement and histogram technology, applied in the field of multimedia information transmission and processing, can solve problems such as loss of details, unclear picture, blurred scene, etc.

Inactive Publication Date: 2009-01-07
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] 1) Videos in dark night or dim scenes will be displayed darker on the mobile phone, so that the picture cannot be seen clearly in normal or too bright indoor and outdoor environments;
[0004] 2) Videos under normal lighting conditions can display fine details in theater

Method used

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  • Method for video enhancement and apparatus thereof
  • Method for video enhancement and apparatus thereof
  • Method for video enhancement and apparatus thereof

Examples

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Embodiment Construction

[0075] Hereinafter, taking the video enhancement of a mobile phone TV as an example, the specific implementation manners of the present invention will be described in conjunction with the accompanying drawings. However, the video enhancement method of the present invention is not limited to the video enhancement of mobile TVs, and can also be applied to other occasions that require video enhancement.

[0076] figure 1 It shows the location of the entire video enhancement device in the system. The video enhancement unit 104 performs video enhancement processing on the source image data output from the input data buffer 102 , and then outputs the processed target image data to the output data buffer 106 . The source image in this embodiment is an image in YUV format, but the present invention can also process images in RGB format.

[0077] figure 2 show figure 1 The module diagram of the video enhancement device 104 includes an image brightness detection module 202 , a brigh...

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Abstract

The invention provides a method and a device used for video enhancement. The method comprises the steps as follows: a nonlinear tensioning curve mapping table is arranged; for each frame of image, the histogram balance mapping table of the frame of image is calculated according to the brightness data; subsequently, the mapping value of at least each brightness value of a brightness value set of the pixel point of the frame of image in the nonlinear tensioning curve mapping table and the histogram balance mapping table is weighted and averaged; furthermore, a brightness mapping table is used for recording the corresponding relationship between each brightness value and the mapping value after weighted-average; subsequently, according to the brightness mapping table, the brightness value of the pixel point of the frame of image is updated as the mapping value after weighted average corresponding to the brightness value. The device of the invention comprises a brightness enhancement module which further comprises a nonlinear curve tensioning table memory unit, a histogram balance mapping table calculation unit, a brightness mapping table calculation unit and an image brightness enhancement mapping unit. The method and the device of the invention can improve the visible effect of the video images under the condition of low illumination and normal illumination.

Description

technical field [0001] The invention belongs to the field of multimedia information transmission and processing, and in particular relates to a video enhancement method and device thereof. Background technique [0002] Video enhancement is a basic means of pre- and post-processing of video. In general, due to the limitation of mobile terminal cost and energy consumption, videos that can be played normally in theaters or TVs will have two shortcoming: [0003] 1) Videos in dark night or dim scenes will be displayed darker on the mobile phone, so that the picture cannot be seen clearly in normal or too bright indoor and outdoor environments; [0004] 2) Videos under normal lighting conditions can display details in theaters or TVs very well, but when displayed on mobile phones, due to the limitations of screen resolution and color resolution, the scene will be somewhat blurred and some details will be lost, especially It is a compressed and decompressed video, and this pheno...

Claims

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Application Information

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IPC IPC(8): H04N5/20G06T5/00
CPCG06T2207/10016H04N5/20G06T5/009G06T5/40H04N9/69H04N5/202
Inventor 郭秀江
Owner ZTE CORP
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