Character overlapping method and device

A character superposition and character technology, applied in the multimedia field, can solve the problems of difficult to distinguish, unclear characters or the entire superimposed content, etc., to achieve the effect of clear display

Inactive Publication Date: 2008-11-05
HUAWEI TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In the process of realizing the present invention, the inventor found that the prior art has at least the following disadvantages: when video content and character-type OSD information are transparently superimposed, if the foreground color of the character-type OSD information is similar to the color of the video, it will not be easy to distinguish As a result, some characters or the entire superimposed content in the superimposed character OSD information cannot be seen clearly

Method used

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  • Character overlapping method and device
  • Character overlapping method and device

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Embodiment 3

[0070] In the third embodiment, the background color of the characters is transparently superimposed to prevent the background color from affecting the display of the video image. At the same time, since the average brightness is calculated according to the video image block, in some scenarios, some parts of the video image block are close to the brightness of the superimposed OSD foreground color, and some parts are far from the superimposed OSD foreground color brightness. It will cause some parts to be superimposed obviously, but other parts are still unclear, and the foreground color of the character with the outline processing has a certain brightness difference between the border color and the foreground color, and the border color also changes with the foreground color. It will make the superimposed information look more prominent. Therefore, the superimposition of the outline processing will make the character OSD clear no matter what kind of video background scene it ...

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Abstract

The embodiment of the invention discloses a character stacking method a device thereof, including: obtaining a video image block required stacking the first character; obtaining the first character; obtaining the brightness mean value of the video image block; adjusting the brightness value of the foreground color pixel point of the first character according to the brightness mean value, to obtain the second character, wherein the relative value of the brightness value of the foreground color pixel point of the second character and the brightness mean value is larger than or equal to the first presupposed value; stacking the foreground color pixel point of the second character according to the brightness value and the corresponding pixel point in the video image block. Through adjusting the brightness value of the foreground color character to be stacked, that the difference is present between the brightness value of the foreground color of the character to be stacked and the brightness mean value of the video image block is ensured, to real-time ensure the contrast between the stacked character and the video image, thereby clearly displaying the stacked character.

Description

technical field [0001] The invention relates to the field of multimedia technology, in particular to a character superimposition method and device. Background technique [0002] Screen display technology has been greatly developed in the current field of video display. Through the screen display technology, additional display information, such as menus and prompt information, can be provided on the basis of video images. The user can adjust the display effect according to the menu, prompt information, etc. [0003] In the screen display scheme of the prior art, when superimposing characters, firstly, the content to be displayed in the onscreen display (OSD) (referred to as OSD information) such as numbers 0 to 9, letters a to z, commonly used brightness, Contrast symbols, etc., are divided into blocks according to a specific format (12×18, 12×16, 24×24), and these contents and color attribute information (foreground color and background color information) are solidified in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N5/445
Inventor 许聪袁长辉
Owner HUAWEI TECH CO LTD
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