CN101360193A - Video subtitle processing apparatus and method - Google Patents
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Abstract
The invention provides a video subtitle processing apparatus and a method, solving the problem that the prior art can not edit subtitles of a video file without subtitle file through processing subtitle regions extracted from video images, and meeting the requirements of users on subtitle size adjustment after video images are narrowed. The invention implements the recovery processing to the original video images, and avoids the problem of black spots on video images caused by subtitle amplification.
Description
Technical field
The present invention relates to field of video processing, particularly a kind of captions process device and method.
Background technology
Along with computer technology, development of multimedia technology, video playback apparatus is various day by day, and mp4, mobile phone are because the advantage that they are convenient for carrying becomes most popular video playback apparatus.Yet these portable sets because its display screen is big or small limited, can cause video caption too small when having its advantage, and the problem of user's reading difficulty occurs.
Because generally speaking, video file all has the subtitle file relevant with video, and the user can edit captions with corresponding caption editing software, can reach the effect of amplifying captions like this.Yet, also there are some video files, the subtitle file of oneself does not want the captions in these video files are amplified, and the user has no way of doing it.
Summary of the invention
In view of this, the object of the present invention is to provide a kind of video subtitle processing apparatus, do not rely on subtitle file, realize the captions in the video are handled.
The present invention also aims to provide a kind of video caption processing method, do not rely on the file captions, realize the captions in the video are handled.
For achieving the above object, a kind of video subtitle processing apparatus comprises:
Captions Detection and Extraction module detects and extracts the caption area in the video image;
The captions processing module is used for according to the captions display parameters of determining the described caption area that extracts being handled.
The video image processing module is used for the video image that extracts caption area is handled;
The subtitle superposition module is used for caption area and processed video image after handling are superposeed.
Described video image processing module comprises:
Video image dwindles the unit, is used for the described video image that extracts caption area is narrowed down to default display size;
Video image is repaired the unit, is used for the caption area of the video image after dwindling is repaired.
Described video image processing module comprises:
Video image is repaired the unit, is used for the described caption area that extracts the video image of caption area is repaired;
Video image dwindles the unit, is used for the video image after repairing is narrowed down to default display size.
Described captions display parameters comprise captions size parameter and display position parameter;
Described captions processing module comprises,
Captions size parameter memory cell is used to store default captions size parameter;
The display position determining unit is used for determining the display position parameter of captions at the video image of pre-set dimension size;
Character recognition unit, be used for the described caption area that extracts is finished cutting apart of single character, also be used for analyzing, obtain related words information, and in character repertoire, find the pairing character image information of single character according to Word message to cutting apart the single character that obtains;
The captions processing unit is used for the captions size parameter of storing according to the image information and the described captions size memory cell of the single character that finds at character repertoire, and the captions of video image are handled.
The font size size that described captions size parameter is captions.
Described captions display parameters comprise line-spacing parameter and the display position parameter between multiplication factor parameter, captions;
Described captions processing module comprises:
The up-sizing determining unit is used for the maximum multiple parameter of determining that the permission captions amplify;
The captions parameter storage unit, the parameter that is used to store captions comprises the line-spacing parameter between captions;
The display position determining unit is used for the line number according to every frame video image captions, determines the display position parameter of the first row captions.
The captions processing unit carries out processing and amplifying according to the determined multiplication factor of up-sizing determining unit to each the row caption area that is extracted.
The background removal unit, the area grayscale value that is used for the caption area after amplifying is removed captions is made as 0.
The maximum multiple that described permission captions amplify is the merchant of long word curtain zone length in the video image width of pre-set dimension size and first frame video image.
Described captions processing module also comprises: the captions split cells when being used for length when delegation's captions greater than the video image width, splits delegation's captions.
The present invention also provides a kind of video caption processing method, and this method comprises:
1) detect in the current frame video image whether contain caption area, if contain then extract caption area, execution in step 3), otherwise, execution in step 2);
2) current frame video image is dwindled processing, and obtain the next frame image, return step 1);
3) caption area that extracts is handled, and determined its display position in the video image of pre-set dimension size, execution in step 4);
4) video image that extracts caption area is dwindled and repair process execution in step 5);
5) caption area and the processed video image after will handling superposes.
Described captions to extraction are treated to:
The caption area that extracts is carried out single character cutting, and character is analyzed, obtain the Word message of captions;
Word message according to single character finds its pairing character image information in character repertoire;
According to the image information and the default captions size parameter of the single character that finds at character repertoire, the captions of video image are handled.
Described captions to extraction are treated to:
With the merchant of long word curtain zone length in the video image width of pre-set dimension size and first frame video image as the maximum multiple that allows video caption to amplify;
According to user's needs each the row caption area that is extracted is carried out processing and amplifying in the scope of the maximum multiple that determined permission video caption amplifies.
The area grayscale value of removing captions in the caption area after amplifying is made as 0.
By above technical scheme as seen, video subtitle processing apparatus provided by the invention and method, by the caption area that extracts from video image is handled, solved prior art and can't carry out the problem of caption editing, satisfied the user and adjusted the demand of captions size dwindling the back at video image to the video file that does not have subtitle file.
And the present invention carried out repair process to raw video image, avoided the problem of spot occurring owing to amplifying video image that captions cause.
Description of drawings
Fig. 1 is the structural representation of a kind of video subtitle processing apparatus provided by the invention;
Fig. 2 is the structure embodiment schematic diagram of a kind of video subtitle processing apparatus provided by the invention;
Fig. 3 is the structure embodiment schematic diagram of another kind of video subtitle processing apparatus provided by the invention;
Fig. 4 is the flow implementation illustration intention of a kind of video caption processing method provided by the invention.
Embodiment
For making purpose of the present invention, technical scheme and advantage clearer, below with reference to the accompanying drawing embodiment that develops simultaneously, the present invention is described in more detail.
Fig. 1 is a kind of video subtitle processing apparatus provided by the invention, and this device comprises:
Captions Detection and Extraction module 101 detects in the video data whether have caption area, if having, then caption area is extracted, and sends to captions processing module 102, and the vedio data that will extract captions sends to video image processing module 103;
Wherein the parameter of captions demonstration comprises: the location parameter that the size parameter of captions and captions show.
Video image processing module 103 be used for handling from the vedio data of captions Detection and Extraction module 101, and the result after will handling sends to subtitle superposition module 104;
Fig. 2 is the structure embodiment schematic diagram of a kind of video subtitle processing apparatus provided by the invention, and wherein equaling size of display with the size of video image is example.In this enforcement, this device comprises: captions Detection and Extraction module, captions processing module, video image processing module, subtitle superposition module, wherein:
Captions Detection and Extraction module, detect in the video data whether have caption area according to video data,, then caption area is extracted if having from the video decode module, send to the captions processing module, and the vedio data that will extract captions sends to the video image processing module;
The captions processing module comprises captions size parameter memory cell 201, character recognition unit 202, captions processing unit 203 and display position determining unit 204.
Wherein, captions size parameter memory cell 201 is used to store default captions size parameter, can be the font size size that shows captions.
Also be used for analyzing, obtain related words information, and in character repertoire, find the corresponding characters image information according to the Word message of single character to cutting apart the single character that obtains.The method that obtains Word message from single character has a lot, uses the OCR recognition technology here.
Display position determining unit 204 is used for determining that captions in the position that display shows, comprise horizontal direction position and vertical direction position.
Wherein the horizontal direction position determines, need to guarantee that the left end of those the longest row captions is no more than the left hand edge of display at least, determining of vertical direction position needs to guarantee that the minimum point near that row captions of display lowermost end does not exceed the lowermost end of display at least.
Further, because captions are exaggerated, may occur, the captions that originally can in delegation, show, after amplification, but do not show, the character number that need show at the multipotency of predetermined display size next line according to the statistics of the captions size parameter after amplifying so just, promptly the width of display more than or equal to N (N be more than or equal to 1 natural number-) the width sum of individual character, less than the width sum of N+1 character.
The video image processing module comprises that video image is repaired unit 205 and video image dwindles unit 206, in the present embodiment, because during video image is handled, earlier image is dwindled no matter earlier image is repaired still, can not influence the display effect of video image, so the video data from the video decode module both can be handled in video image reparation unit 205 earlier, also can dwindle in the unit 206 at video image earlier and handle.
Wherein, video image is repaired the processing of carrying out in the unit 205 at video image, be specially: at first, read the positional information of the detected caption area of captions Detection and Extraction module, such as, the minimum circumscribed area of caption area, the positional information of detected caption area is mapped in the video image, and, then, use texture to repair algorithm repair process is carried out in the zone that is mapped to a kind of color showing in the zone that is mapped to.The one of ordinary skilled in the art can adopt the computational methods of known minimum circumscribed area and texture to repair algorithm realization the present embodiment, repeats no more herein.
In the video image processing module, also to carry out another step to video image and handle, that is exactly to dwindle the processing of dwindling of carrying out image in the unit 206 at video image.Its multiple that dwindles equals the merchant of the size of original video image size and required video image displayed.General, the size of required video image displayed is the size of video image when full frame, is the size of current display screen.
Through video image processing module processed video view data and video image parameter, be sent in the subtitle superposition module, wherein video image parameter comprises video image length and width.
The subtitle superposition module is used for caption area and processed video image after handling are superposeed.
Fig. 3 is the structure embodiment schematic diagram of another kind of video subtitle processing apparatus provided by the invention.In the present embodiment, this device comprises: captions Detection and Extraction module, captions processing module, video image processing module, subtitle superposition module.
Wherein, the structure of removing the captions processing module changes to some extent, and the structure and the function of other each modules are identical, has not here just given unnecessary details.
The captions processing module comprises up-sizing determining unit 301, captions parameter storage unit 302, display position determining unit 303, captions processing unit 304 and background removal unit 305.
Up-sizing determining unit 301 is used for the maximum amplification parameter of determining that the permission captions amplify.Obtain the longest caption area length information of length in first frame video image, maximum multiplication factor is the merchant of the long word curtain zone length of display width and this.
Captions parameter storage unit 302, the parameter that is used to store captions comprises the line-spacing parameter of captions.
Display position determining unit 303 is used for the line number according to every frame video image captions, determines the display position parameter of the first row captions.Such as, if the captions of a frame video image are 1 row, can determine that so the display position of the first row captions and the distance of display lowermost end are 1/9 of height of display; If the captions of a frame video image are 3 row, can determine that so the display position of the first row captions and the distance of display lowermost end are 1/3 of height of display.For determining of the display position of the first row captions, can set according to user's needs.The display position of the second row captions and the distance of display lowermost end are the display position of the first row captions, line-spacing and the amplification back character height sum that captions show, by that analogy.
Captions processing unit 304 carries out processing and amplifying according to the determined multiplication factor of up-sizing determining unit 301 to each the row caption area that is extracted.
Background removal unit 305, the area grayscale value that is used for the caption area after amplifying is removed captions is made as 0.At first find out the background area.In the present embodiment, adopt Octree color quantizing algorithm to the caption area binaryzation after, the method that the utilization form is handled finds the zone that obtains captions and comprise all edge pixels of captions, left zone is the background parts of caption area.The gray value of this subregion is made as 0.
Because the not requirement successively of these two steps handled in background removal and captions, therefore, the annexation of these two unit can be different with the relation shown in the present embodiment schematic diagram.
Further, owing to can not avoid occurring the width of the width of delegation's captions like this greater than display, so set up the captions split cells here.Whether the width of at first judging delegation's captions greater than the width of display, if greater than, then these row captions are split.Can be with the right hand edge of display fractionation position as prediction.
Further, for fear of this predicted position not between two words, promptly on certain character, near the method that this predicted position, adopts local binaryzation and upright projection to cut apart then, judge that it is whether between two characters, if then, then with this predicted position as splitting the position, if not, then with predicted position to left, and repeat above-mentioned deterministic process, up to the centre position of finding two characters, with it as splitting the position.
According to said apparatus, the present invention also provides a kind of method of video caption device.Fig. 4 is the embodiment schematic diagram of the method for a kind of video caption processing provided by the invention.This method has following steps:
Step 401 detects in the current frame video image whether contain caption area, if contain, then extracts caption area execution in step 403; If do not contain, execution in step 402;
Step 402 is dwindled processing to current frame video image, and obtains the next frame image, returns step 401;
Step 403 is handled the caption area that extracts;
This step is specially: the caption area that extracts is carried out single character cutting, and character is analyzed, obtain the Word message of character, find the character image of each character according to the Word message of character in character repertoire;
Then, handle according to default captions size parameter and the character image that in character repertoire, finds with to the captions of video image.。
This step can also for: with the merchant of the length in display width and the long word curtain zone of first two field picture maximum amplification, the captions in the video image are carried out processing and amplifying according to user's needs as caption area.
Because the length of caption area differs, the width that length after captions amplify surpasses display might occur, so this step further comprises the captions split process.Can be with the right hand edge position of display as predicted position, for fear of this predicted position not between two words, promptly on certain character, near the method that this predicted position, adopts local binaryzation and upright projection to cut apart then, judge that it is whether between two characters, if then, then with this predicted position as splitting the position, if not, then with predicted position to left, and repeat above-mentioned deterministic process, up to the centre position of finding two characters, with it as splitting the position.
Step 404 is determined the display position of captions.
This step comprises determines horizontal direction position and vertical direction position.
Wherein the horizontal direction position determines, need to guarantee that the left end of those the longest row captions is no more than the left hand edge of display at least, determining of vertical direction position needs to guarantee that the minimum point near that row captions of display lowermost end does not exceed the lowermost end of display at least.
Step 405 is dwindled and repair process the video image behind the extraction captions.
The precedence relationship of two processing procedures of in this step the video image behind the extraction captions being carried out is fixing, wherein video image is carried out repair process, mainly is the reparation to caption area.
Step 406 superposes captions and processed video image after handling.
By the above embodiments as seen, video subtitle processing apparatus provided by the invention and method, by the caption area that extracts from video image is handled, solved prior art and can't carry out the problem of caption editing, satisfied the user and adjusted the demand of captions size dwindling the back at video image to the video file that does not have subtitle file.
And the present invention carried out repair process to raw video image, avoided the problem of spot occurring owing to amplifying video image that captions cause.
By above-mentioned explanation, the embodiment of the invention described above launches with the purpose of example, those of ordinary skill in the art will be appreciated that, above embodiment is used for illustrating the present invention, and be not to be used as limitation of the invention, as long as in connotation scope of the present invention, all will drop in the scope of claims of the present invention variation, the modification of the above embodiment.
Claims (12)
1, a kind of video subtitle processing apparatus is characterized in that, this device comprises:
Captions Detection and Extraction module detects and extracts the caption area in the video image;
The captions processing module is used for according to the captions display parameters of determining the described caption area that extracts being handled.
2, device as claimed in claim 1 is characterized in that, this device also comprises:
The video image processing module is used for the video image that extracts caption area is handled;
The subtitle superposition module is used for caption area and processed video image after handling are superposeed.
3, device as claimed in claim 2 is characterized in that, described video image processing module comprises:
Video image dwindles the unit, is used for the described video image that extracts caption area is narrowed down to default display size;
Video image is repaired the unit, is used for the caption area of the video image after dwindling is repaired.
4, device as claimed in claim 2 is characterized in that, described video image processing module comprises:
Video image is repaired the unit, is used for the described caption area that extracts the video image of caption area is repaired;
Video image dwindles the unit, is used for the video image after repairing is narrowed down to default display size.
5, device as claimed in claim 1 is characterized in that: described captions display parameters comprise captions size parameter and display position parameter;
Described captions processing module comprises,
Captions size parameter memory cell is used to store default captions size parameter;
The display position determining unit is used for determining the display position parameter of captions at the video image of pre-set dimension size;
Character recognition unit, be used for the described caption area that extracts is finished cutting apart of single character, also be used for analyzing, obtain related words information, and in character repertoire, find the pairing character image information of single character according to Word message to cutting apart the single character that obtains;
The captions processing unit is used for the captions size parameter of storing according to the image information and the described captions size memory cell of the single character that finds at character repertoire, and the captions of video image are handled.
6, device as claimed in claim 5 is characterized in that: the font size size that described captions size parameter is captions.
7, device as claimed in claim 1 is characterized in that: described captions display parameters comprise line-spacing parameter and the display position parameter between multiplication factor parameter, captions;
Described captions processing module comprises,
The up-sizing determining unit is used for the maximum multiple parameter of determining that the permission captions amplify;
The captions parameter storage unit, the parameter that is used to store captions comprises the line-spacing parameter between captions;
The display position determining unit is used for the line number according to every frame video image captions, determines the display position parameter of the first row captions.
The captions processing unit carries out processing and amplifying according to the determined multiplication factor of up-sizing determining unit to each the row caption area that is extracted.
The background removal unit, the area grayscale value that is used for the caption area after amplifying is removed captions is made as 0.
8, device as claimed in claim 7 is characterized in that: the maximum multiple that described permission captions amplify is the merchant of long word curtain zone length in the video image width of pre-set dimension size and first frame video image.
9, device as claimed in claim 7 is characterized in that, described captions processing module also comprises: the captions split cells when being used for length when delegation's captions greater than the video image width, splits delegation's captions.
10, a kind of video caption processing method is characterized in that, this method comprises:
1) detect in the current frame video image whether contain caption area, if contain then extract caption area, execution in step 3), otherwise, execution in step 2);
2) current frame video image is dwindled processing, and obtain the next frame image, return step 1);
3) caption area that extracts is handled, and determined its display position in the video image of pre-set dimension size, execution in step 4);
4) video image that extracts caption area is dwindled and repair process execution in step 5);
5) caption area and the processed video image after will handling superposes.
11, method as claimed in claim 10 is characterized in that: described captions to extraction are treated to:
The caption area that extracts is carried out single character cutting, and character is analyzed, obtain the Word message of captions;
Word message according to single character finds its pairing character image information in character repertoire;
According to the image information and the default captions size parameter of the single character that finds at character repertoire, the captions of video image are handled.
12, method as claimed in claim 10 is characterized in that, described captions to extraction are treated to:
With the merchant of long word curtain zone length in the video image width of pre-set dimension size and first frame video image as the maximum multiple that allows video caption to amplify;
According to user's needs each the row caption area that is extracted is carried out processing and amplifying in the scope of the maximum multiple that determined permission video caption amplifies.
The area grayscale value of removing captions in the caption area after amplifying is made as 0.
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| CN102521805A (en) * | 2011-11-30 | 2012-06-27 | 华中科技大学 | Video word processing method based on interframe information |
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