CN102497593B - Text-oriented online remote education video rendering method - Google Patents
Text-oriented online remote education video rendering method Download PDFInfo
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- CN102497593B CN102497593B CN 201110388786 CN201110388786A CN102497593B CN 102497593 B CN102497593 B CN 102497593B CN 201110388786 CN201110388786 CN 201110388786 CN 201110388786 A CN201110388786 A CN 201110388786A CN 102497593 B CN102497593 B CN 102497593B
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- 238000000034 method Methods 0.000 title claims abstract description 15
- 238000009877 rendering Methods 0.000 title claims abstract description 13
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Abstract
The invention discloses a text-oriented online remote education video rendering method, which comprises the implementation steps of: (1) requesting video frames from a server by a client; (2) filtering the obtained videos by the client to obtain preprocessed images; (3) respectively obtaining average values of color values of RGB (Red, Green, Blue) three channels in each of rows of the preprocessed images, and working out a sum of three average values as the sum of color information; and (4) traversing each of the rows of the preprocessed images, if the sum of color information from the beginning of current row to the termination of Nth row keeps constant, sharpening the images from the current row to the Nth row, and finally outputting the sharpened preprocessed images as the video frames. The text-oriented online remote education video rendering method disclosed by the invention has the advantages of clear output characters, good video quality, small expense and convenience for use.
Description
Technical field
The present invention relates to the multimedia teaching field, be specifically related to a kind of online distance education Video Rendering method of text-oriented.
Background technology
In recent years, development along with the Internet, amusement based on Online Video, friend-making, teaching have obtained increasingly extensive application, and in the Internet video application, the throughput of network, propagation delay time etc. are not constantly to change in the same time, this just makes the grouping of transmission video signal be difficult to arrive receiving terminal with the grouping of its corresponding sound accompaniment of transmission simultaneously, thereby the problem that the broadcasting that makes vision signal can not be synchronizeed with its sound accompaniment is more serious, produce the effect of " labial is asynchronous ", the promotion and application of the amusement based on Online Video, friend-making, teaching have greatly been limited.
But the progressively development along with the Internet, the speed of broadband access is more and more higher, the general public in city has generally reached the access in 2 ~ 4M broadband at present, and the high-grade community of part has started light and has registered one's residence, it is even more that bandwidth even can reach 100M, and Here it is, and long-range the giving lessons of real-time online that video quality becomes better and better created condition.By the compress technique of good video, can realize online long-range the giving lessons of 768K low bandwidth at present.But, network is good again, server also may send and block up, therefore how the optimization based on the transmitting video image frame becomes an important technical problem, and the online distance education video also has important characteristics, be exactly wherein often to have more word, and word is often more and little, adopt traditional Video Rendering method often writings and image process equally, but word is often not identical with the requirement of image, therefore the way of prior art often causes online distance education video Chinese word definition inadequate, the video total quality is not high, the promotion and application of online distance education video have been affected.
Summary of the invention
The technical problem to be solved in the present invention is to provide the online distance education Video Rendering method of the text-oriented that a kind of output character is clear, video quality good, expense is little, easy to use.
In order to solve the problems of the technologies described above, the technical solution used in the present invention is:
A kind of online distance education Video Rendering method of text-oriented, implementation step is as follows:
1) user end to server request frame of video;
2) client is carried out filtering by the video obtained and is obtained pretreatment image;
3) obtain respectively the color numerical value mean value of tri-passages of each row of pretreatment image RGB, and ask for three mean values and as the colouring information summation;
4) each row of traversal pretreatment image, if start to remain unchanged to capable its colouring information summation that stops of N from current line, start the image capable to N by current line and carry out the sharpening processing, and the pretreatment image after processing is the most at last exported as frame of video.
As further improvement in the technical proposal:
Described step 2) filtering in specifically refers to the employing gaussian filtering.
In described step 4), carry out also comprising current line being started to the step that the image capable to N carries out dilation operation after the sharpening processing.
In described step 4), carry out also comprising current line being started to the step that the image capable to N increased the contrast computing after the sharpening processing.
The present invention has following advantage:
User end to server request frame of video of the present invention, client is carried out filtering by the video obtained and is obtained pretreatment image, obtain respectively the color numerical value mean value of tri-passages of each row of pretreatment image RGB, and ask for three mean values and as the colouring information summation, each row of traversal pretreatment image, if start to remain unchanged to capable its colouring information summation that stops of N from current line, current line is started to the image capable to N and carry out the sharpening processing, pretreatment image after processing is the most at last exported as frame of video, therefore carry out the character area in recognition image for the colouring information summation, then character area is carried out to the display resolution that sharpening improves word, there is output character clear, video quality is good, expense is little, advantage easy to use.
The accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, below will the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain according to these accompanying drawings other accompanying drawing.
The main schematic flow sheet that Fig. 1 is the embodiment of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the preferred embodiments of the present invention are described in detail, thereby so that advantages and features of the invention can be easier to be it will be appreciated by those skilled in the art that, protection scope of the present invention are made to more explicit defining.
As shown in Figure 1, the implementation step of the online distance education Video Rendering method of the present embodiment text-oriented is as follows:
1) user end to server request frame of video;
2) client is carried out filtering by the video obtained and is obtained pretreatment image;
3) obtain respectively the color numerical value mean value of tri-passages of each row of pretreatment image RGB, and ask for three mean values and as the colouring information summation;
4) each row of traversal pretreatment image, if start to remain unchanged to capable its colouring information summation that stops of N from current line, start the image capable to N by current line and carry out the sharpening processing, and the pretreatment image after processing is the most at last exported as frame of video.
The present embodiment step 2) filtering in specifically refers to the employing gaussian filtering, by gaussian filtering, can effectively reduce the noise that pretreatment image is brought because of Internet Transmission, can improve the display quality of pretreatment image.
In the present embodiment step 4), carry out also comprising current line being started to the step that the image capable to N carries out dilation operation after the sharpening processing, dilation operation can be removed some granules of the detail in pretreatment image, can further improve the display quality of pretreatment image.
In the present embodiment step 4), carry out also comprising current line being started to the step that the image capable to N increased the contrast computing after the sharpening processing, the parameter that increases the contrast computing can be arranged according to actual needs.
The above is only the preferred embodiment of the present invention, and protection scope of the present invention also not only is confined to above-described embodiment, and all technical schemes belonged under thinking of the present invention all belong to protection scope of the present invention.It should be pointed out that for those skilled in the art, some improvements and modifications without departing from the principles of the present invention, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (4)
1. the online distance education Video Rendering method of a text-oriented is characterized in that implementation step is as follows:
1) user end to server request frame of video;
2) client is carried out filtering by the video obtained and is obtained pretreatment image;
3) obtain respectively the digital average value of the single color of tri-passages of each row of pretreatment image RGB, and ask for three mean values and as the colouring information summation;
4) each row of traversal pretreatment image, if start to remain unchanged to capable its colouring information summation that stops of N from current line, start the image capable to N by current line and carry out the sharpening processing, and the pretreatment image after processing is the most at last exported as frame of video.
2. the online distance education Video Rendering method of text-oriented according to claim 1, is characterized in that described step 2) in filtering specifically refer to the employing gaussian filtering.
3. the online distance education Video Rendering method of text-oriented according to claim 2, is characterized in that, in described step 4), carries out also comprising current line being started to the step that the image capable to N carries out dilation operation after the sharpening processing.
4. according to the online distance education Video Rendering method of claim 1 or 2 or 3 described text-orienteds, it is characterized in that, carry out in described step 4) also comprising current line being started to the step that the image capable to N increased the contrast computing after the sharpening processing.
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| CN 201110388786 CN102497593B (en) | 2011-11-30 | 2011-11-30 | Text-oriented online remote education video rendering method |
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| CN 201110388786 CN102497593B (en) | 2011-11-30 | 2011-11-30 | Text-oriented online remote education video rendering method |
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| CN102497593B true CN102497593B (en) | 2013-12-25 |
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| CN105654799B (en) * | 2016-03-30 | 2018-08-28 | 苏州点通教育科技有限公司 | Classroom instruction smart pen interaction systems and method |
| CN105632266B (en) * | 2016-03-30 | 2018-08-28 | 苏州点通教育科技有限公司 | Classroom instruction interaction systems and method |
| CN105679129B (en) * | 2016-03-30 | 2018-08-28 | 苏州点通教育科技有限公司 | Classroom instruction tablet computer and smart pen interaction systems and method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1284233A (en) * | 1998-01-23 | 2001-02-14 | 夏普公司 | Image processing device and image processing method |
| EP1933275A2 (en) * | 2006-12-11 | 2008-06-18 | Samsung Electronics Co., Ltd. | Apparatus and method to improve clarity of image |
| CN101453575A (en) * | 2007-12-05 | 2009-06-10 | 中国科学院计算技术研究所 | Video subtitle information extracting method |
| CN101515325A (en) * | 2009-04-08 | 2009-08-26 | 北京邮电大学 | Character extracting method in digital video based on character segmentation and color cluster |
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2011
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1284233A (en) * | 1998-01-23 | 2001-02-14 | 夏普公司 | Image processing device and image processing method |
| EP1933275A2 (en) * | 2006-12-11 | 2008-06-18 | Samsung Electronics Co., Ltd. | Apparatus and method to improve clarity of image |
| CN101453575A (en) * | 2007-12-05 | 2009-06-10 | 中国科学院计算技术研究所 | Video subtitle information extracting method |
| CN101515325A (en) * | 2009-04-08 | 2009-08-26 | 北京邮电大学 | Character extracting method in digital video based on character segmentation and color cluster |
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