CN101242474A - A dynamic video browse method for phone on small-size screen - Google Patents
A dynamic video browse method for phone on small-size screen Download PDFInfo
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Abstract
The present invention provides a dynamic video browser of photograph on the small-sized screen, including: testing the region of interest in the image, the region of interest including character, written word, object and area having high contrast and attractive by user; self-adapting adjusting video size, making the size of region of interest corresponding to the small-sized screen; determining the playing orders of the region of interest to obtain a serial sequence object area, generating video frame according to a serial sequence objects and finally generating image browsing video. The invention automatically converts the picture having higher resolving capability to the video browse, and viewing on the equipment having smaller resolving capability such as mobile phone, and leaving the important details; the dynamic effect improving user visual viewing and enriching browse mode of user, having divinable application and market value under the condition of coming broadband wireless multimedia communication.
Description
Technical field
The present invention relates to image and video processing technique in the multimedia technology field, the dynamic view method of particularly a kind of photo on small-size screen equipment.
Background technology
Over nearly 10 years, the camera-shooting and recording device fast development of digitized image and video information, small-sized, high-resolution digital camera becomes more and more universal.Now, the user can take the photo of their interested scenes to obtain wanting in any place any time easily.The quality of the resultant photo of digital camera is also more and more higher, just can produce the photo of 3264 * 2448 resolution such as the digital camera of previous common 8,000,000 pixels of order.Meanwhile, high-quality image camera function also will expand in the handheld mobile device very soon, and the camera of 5,000,000 pixels has been arranged as up-to-date shooting mobile phone.The user needs various browsing mode under different digital devices and network condition like this.
Along with the develop rapidly of mobile communication technology, the universal face of small screen devices such as mobile phone is more and more wider.The function of mobile phone has been not only to make a phone call and send short messages, take pictures, listen and to sing, record, read e-book, watches multimedia function such as local video also to occur.Along with the appearance of 3G mobile communication, we are about to enter the broadband mobile communication epoch, and the broadband mobile communication will provide the high quality multimedia content service, and the market in this field also will enlarge day by day.Though use mobile devices such as mobile phone, PDA can be at any time and any place, obtain the content of multimedia of wanting very easily in any available mode, even but concerning state-of-the-art equipment, the screen of mobile device is still very limited, often have only about 2.5 inches, and higher resolution just reaches about 240 * 320, yet on the other hand, the resolution of digital photograph is increasing, can only see whole general content when on small screen devices such as mobile phone, watching, and can easily not see the material particular of the inside.Like this with regard to the adaptive browser technology of demand side to the digital photograph of mobile phone screen.
Summary of the invention
The objective of the invention is to overcome the contradiction between the small screen of the big resolution of digital photograph and small-size screen equipment, thereby but provide a kind of comparison film to do the method for dynamic view.
To achieve these goals, the invention provides the dynamic video browsing method of a kind of photo on small-size screen equipment, comprise following steps:
Area-of-interest in step 10), the detected image;
Step 20), video size is done the self adaptation adjustment, the size of the area-of-interest that obtains in the step 10) and described small-size screen equipment are adapted;
Step 30), determine the playing sequence of area-of-interest in the image, thereby obtain a series of order subject area;
Step 40), according to step 30) in a series of order subject area that obtain produce frame of video, generate final picture browsing video.
In the technique scheme, described 10) in, described area-of-interest is for personage or literal or object or contrast is higher, can cause the zone that the user notes.
Detected area-of-interest has one or more.
In the technique scheme, in described step 20) in, the method for described self adaptation adjustment comprises:
Step 20-1), judge the width of minimum area-of-interest and highly whether less than the width of described small-size screen equipment and height, if, then carry out next step, otherwise, execution in step 20-3);
Step 20-2), the size of area-of-interest after the conversion is the width and the height of mobile device screen, end step 20);
Step 20-3), the size of the area-of-interest after the conversion is the width and the height of minimum area-of-interest.
In the technique scheme, in described step 30) in, described playing sequence comprises: according to from top to bottom, order from left to right is gradually from an area-of-interest convergent-divergent and move to next area-of-interest.
In the technique scheme, in described step 30) in, described a series of order subject area Taregion0, Taregion1 ... TaregionM represents, wherein, Taregion0 represents to convert to the original image that has same the ratio of width to height with the screen of described small-size screen equipment, Targeion1 ... the area-of-interest of TaregionM order of representation.
Described step 40) comprising:
Step 40-1), an area-of-interest is converted into the size identical with target video, the area-of-interest after will changing then is as a width of cloth frame of video, and this frame is replicated several to produce the static effect of video camera;
Step 40-2), determine the zooming effect of video clips, if current area-of-interest is bigger than next area-of-interest, then dwindle, otherwise amplify;
Step 40-3), determine the step-length of video clips;
Step 40-4), according to step 40-3) determined step-length and step 40-2) determined zooming effect, produce the frame of video relevant, and the size conversion of resultant frame of video become big or small identical with target video with video clips;
Step 40-5), all area-of-interests are repeated above-mentioned steps from Taregion0 to TaregionM-1, produce a series of needed frame of video, at last these frame of video are encoded into the needed video format of described small-size screen equipment, obtain final picture browsing video.
At described step 40-3) in, described step-length determines according to the needs that produce the survivor are manual, or according to the position of two area-of-interests and size is determined and with the size of original image relatively come automatically and self adaptation definite.
At described step 40-4) in, when producing the frame of video relevant with video clips, when an area-of-interest moves to another area-of-interest, can first translation after convergent-divergent, or translation behind the first convergent-divergent, or convergent-divergent and translation are carried out simultaneously.
At described step 40-5) in, the compression frame per second of described video is determined according to the screen size of small-size screen equipment or the needs of computing capability.
The invention has the advantages that:
1, the dynamic video browsing method of photo of the present invention on small-size screen equipment can automatically convert the higher relatively picture of resolution to video clips and browse, and watches on the device screen of little resolution such as mobile phone, and do not ignore material particular wherein.
2, the resulting dynamic effect of the present invention vision that can improve the user is watched, and enriches user's browse mode, has under the environment of following broadband radio multi-media communication and has predictable application prospect and market value.
Description of drawings
Fig. 1 is for being used for illustrating the human body portrait photo of the inventive method in one embodiment;
Fig. 2 is for carrying out the result after area-of-interest detects to the human body portrait photo among Fig. 1;
Fig. 3 is to the schematic diagram of genesis sequence subject area in order of the area-of-interest among Fig. 2;
Fig. 4 is the flow chart of the inventive method.
Embodiment
Below in conjunction with the drawings and specific embodiments the present invention is described in further detail:
In one embodiment, as shown in Figure 1, with a width of cloth photo of three human body portraits being arranged is example, with reference to figure 4, method of the present invention is described.
Area-of-interest in step 10, the detected image.Area-of-interest in the image is meant the special object in the image, personage for example, and literal, object, and contrast is higher, can cause that zone that the user notes can be the area-of-interest in the image.Utilize the technology and method of image processing, can from image, detect one or more area-of-interests.
The concrete detection of area-of-interest has multiple situation, and detecting with people's face below is example, and the testing process of area-of-interest is elaborated.The method that the personnel selection face detects is determined area-of-interest, is exactly whether to have people's face in the process decision chart picture, in a concrete implementation is to adopt the method based on Heuristic Model to detect, and the basic operational steps of this testing process comprises:
1, extracting from input picture may be corresponding to the mosaic edge of the horizontal direction of organs such as eyebrow, eyes, mouth, and the center of calculating each section edge;
2, use region template to mate to the rapid result of previous step, the result who obtains mating;
3, use the result of gray scale and edge feature checking coupling, thereby determined whether people's face,, then return its coordinate and size if having.
Except above-mentioned people's face detects, also available word area detection method based on the edge is extracted area-of-interest, this method will be carried out rim detection to image according to the intensive characteristic in character area edge in testing process, then intensive edge is merged into the zone, and confirms that therefrom character area is with as area-of-interest.
Above-mentioned detected area-of-interest can be represented with minimum area-encasing rectangle zone, also can represent the proper method of area-of-interest with other.
Photo to Fig. 1 detects area-of-interest, and in the figure, described area-of-interest mainly is the people's face of three people in the photo, and therefore, in the testing result of Fig. 2, detected three people's faces are exactly described area-of-interest.In Fig. 2, area-of-interest is marked with rectangle.
The self adaptation adjustment of step 20, video size.Because the equipment of small-size screens such as mobile phone has different sizes and different the ratio of width to height, and detected area-of-interest also has different sizes in step 10, in order to make the video that finally obtains on small-size screens such as mobile phone, to play, need be according to the size of area-of-interest, size and the ratio of width to height of small-size screen equipment, determine the resolution sizes of video, its specific implementation process is as follows:
Width and the height of at first representing the mobile device screen with ScreenW and ScreenH; Width and the height of representing an area-of-interest with CRegionW and CRegionH, the width of the area-of-interest after the conversion and highly representing with FRegionW and FRegionH, conversion method is as follows: suppose the width and width and the height of height less than the mobile device screen of minimum area-of-interest, the size of the area-of-interest after the conversion is the width and the height of mobile device screen so; Otherwise the size of the area-of-interest after the conversion is the width and the height of minimum area-of-interest, makes the video of generation be adapted at playing on the screen of target device.
In the present invention, multiple playing sequence can be arranged, can both obtain playing as long as described playing sequence can guarantee the area-of-interest in the image.In the present embodiment, a kind of production method of order subject area is according to from top to bottom, and order from left to right is gradually from an area-of-interest convergent-divergent and move to next area-of-interest.The position of area-of-interest is wherein determined according to the position up and down of central point in image of its minimum area-encasing rectangle.
As shown in Figure 3, to three area-of-interests in the image, according to from top to bottom, from left to right order can form a series of order subject area successively.In Fig. 3, area-of-interest is carried out 1,2,3 numberings according to sequencing.
According to the order subject area in the step 30, produce a video, at first provide entire image in this video, convergent-divergent and move to first area-of-interest moves to next zone successively according to order more then.So just determined that a series of videos want the order subject area of virtual shooting: Taregion0, Taregion1 ... TaregionM, wherein Taregion0 represents to convert to the original image that has same the ratio of width to height with the mobile device screen, Targeion1 ... the area-of-interest of TaregionM order of representation.
Be without loss of generality, any two continuous area-of-interest Taregionk move to Targeionk+1, and (production method of the frame of video of 1＜k＜M) has multiple, it can be translation behind the first convergent-divergent, it also can be convergent-divergent after the first translation, also can be two realizations that combine, each width of cloth frame of video be the part in the original image.
Provide the embodiment of the production method of one section frame of video below, this section frame of video has reflected the process from an area-of-interest to next area-of-interest.In this section frame of video, adopted the Pan and Zoom operation simultaneously.Adopt Pan and Zoom operation both better movement effects can be arranged simultaneously, saved the reproduction time of video clips again, this is a kind of but the production method that need to prove frame of video is not limited to.The concrete production method of this section frame of video is as follows:
Step 41, area-of-interest Taregionk are converted into the size identical with target video, and the area-of-interest after will changing then is as a width of cloth frame of video, and this frame is replicated several to produce the static effect of video camera; In this step, described multiple image is generally more than or equal to 5 frames, and is less than or equal to 50 frames.
Step 42, determine the zooming effect of video clips,, then dwindle (zoom out) if Taregionk is bigger than Taregionk+1, otherwise amplify (zoom in);
Step 43, determine the step-length (stepn) of video clips, the step-length of described video clips is meant and will produces how many two field pictures to realize from the Taregionk translation and to zoom to the effect of Taregionk+1, this can determine according to the needs that produce the survivor are manual, also can according to the position of two area-of-interests and size and with original image size relatively come automatically and adaptive definite.In one embodiment, described step-length can be 200.
In this step, described according to two area-of-interests the position and size and with original image size relatively come can adopt multiple implementation method with adaptive definite step-length automatically, for example:
The position of supposing two central point of area of interest be respectively (centerAx, centerAy) and (centerBx, centerBy), then the Euclidean distance between 2 is
The step-length stepn=DistanceAB/delta that is asked then, wherein
Step 44, according to step-length (stepn) and zooming effect, produce the frame of video relevant, and the size conversion of resultant frame of video become big or small identical with target video, for the needs of subsequent compression vision operation with video clips.Suppose the width of input picture and highly be ImgW and ImgH, the width of area-of-interest Taregionk and length are TaregionWk and TaregionHk, the coordinate of this regional center point is (CeterWk, CenterHk), the width of area-of-interest Taregionk+1 and length are TaregionWk+1 and TaregionHk+1, the coordinate of the central point that this is regional is (Center Wk+1, CenterHk+1), a series of like this image can obtain by a part of zone of intercepting in the original image, obtains the size of subimage and position then according to zooming effect, step-length, parameters such as the position of Taregioni and Taregioni+1 and size are determined.Because the size of truncated picture sequence has different width and height, they are normalized into the height and width of target video: the size of VideoH and VideoW.
Step 45, all area-of-interests are repeated the process of above-mentioned steps 41 to 44 from Taregion0 to TaregionM-1, produce a series of needed frame of video, at last these frame of video are encoded into the needed video format of mobile device, the frame per second of compression can be determined according to the needs of display device or computing capability.For example, the PAL form be 25 frame/seconds, on the mobile device that has, video can be 15 frame/seconds.
It should be noted last that above embodiment is only unrestricted in order to technical scheme of the present invention to be described.Although the present invention is had been described in detail with reference to embodiment, those of ordinary skill in the art is to be understood that, technical scheme of the present invention is made amendment or is equal to replacement, do not break away from the spirit and scope of technical solution of the present invention, it all should be encompassed in the middle of the claim scope of the present invention.
Claims (10)
1. the dynamic video browsing method of a photo on small-size screen equipment comprises following steps:
Area-of-interest in step 10), the detected image;
Step 20), video size is done the self adaptation adjustment, the size of the area-of-interest that obtains in the step 10) and described small-size screen equipment are adapted;
Step 30), determine the playing sequence of area-of-interest in the image, thereby obtain a series of order subject area;
Step 40), according to step 30) in a series of order subject area that obtain produce frame of video, generate final picture browsing video.
2. the dynamic video browsing method of photo according to claim 1 on small-size screen equipment is characterized in that, described 10) in, described area-of-interest is for personage or literal or object or contrast is higher, can cause the zone that the user notes.
3. the dynamic video browsing method of photo according to claim 2 on small-size screen equipment is characterized in that detected area-of-interest has one or more.
4. the dynamic video browsing method of photo according to claim 1 on small-size screen equipment is characterized in that, in described step 20) in, the method for described self adaptation adjustment comprises:
Step 20-1), judge the width of minimum area-of-interest and highly whether less than the width of described small-size screen equipment and height, if, then carry out next step, otherwise, execution in step 20-3);
Step 20-2), the size of area-of-interest after the conversion is the width and the height of mobile device screen, end step 20);
Step 20-3), the size of the area-of-interest after the conversion is the width and the height of minimum area-of-interest.
5. the dynamic video browsing method of photo according to claim 1 on small-size screen equipment, it is characterized in that, in described step 30) in, described playing sequence comprises: according to from top to bottom, order from left to right is gradually from an area-of-interest convergent-divergent and move to next area-of-interest.
6. the dynamic video browsing method of photo according to claim 1 on small-size screen equipment, it is characterized in that, in described step 30) in, described a series of order subject area Taregion0, Taregion1 ... TaregionM represents, wherein, Taregion0 represents to convert to the original image that has same the ratio of width to height with the screen of described small-size screen equipment, Targeion1 ... the area-of-interest of TaregionM order of representation.
7. the dynamic video browsing method of photo according to claim 6 on small-size screen equipment is characterized in that described step 40) comprising:
Step 40-1), an area-of-interest is converted into the size identical with target video, the area-of-interest after will changing then is as a width of cloth frame of video, and this frame is replicated several to produce the static effect of video camera;
Step 40-2), determine the zooming effect of video clips, if current area-of-interest is bigger than next area-of-interest, then dwindle, otherwise amplify;
Step 40-3), determine the step-length of video clips;
Step 40-4), according to step 40-3) determined step-length and step 40-2) determined zooming effect, produce the frame of video relevant, and the size conversion of resultant frame of video become big or small identical with target video with video clips;
Step 40-5), all area-of-interests are repeated above-mentioned steps from Taregion0 to TaregionM-1, produce a series of needed frame of video, at last these frame of video are encoded into the needed video format of described small-size screen equipment, obtain final picture browsing video.
8. the dynamic video browsing method of photo according to claim 7 on small-size screen equipment, it is characterized in that, at described step 40-3) in, described step-length determines according to the needs that produce the survivor are manual, or according to the position of two area-of-interests and size and with original image size relatively come automatically and self adaptation definite.
9. the dynamic video browsing method of photo according to claim 7 on small-size screen equipment, it is characterized in that, at described step 40-4) in, when producing the frame of video relevant with video clips, when an area-of-interest moves to another area-of-interest, convergent-divergent after can first translation, or translation behind the first convergent-divergent, or convergent-divergent and translation are carried out simultaneously.
10. the dynamic video browsing method of photo according to claim 7 on small-size screen equipment, it is characterized in that, at described step 40-5) in, the compression frame per second of described video is determined according to the screen size of small-size screen equipment or the needs of computing capability.
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| CNA2007100637880A CN101242474A (en) | 2007-02-09 | 2007-02-09 | A dynamic video browse method for phone on small-size screen |
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| CN102177712A (en) * | 2008-10-09 | 2011-09-07 | 日本电气株式会社 | Terminal, image display method, and program |
| CN102300046A (en) * | 2010-06-25 | 2011-12-28 | 佳能株式会社 | Image sensing apparatus and control method thereof |
| CN102541494A (en) * | 2010-12-30 | 2012-07-04 | 中国科学院声学研究所 | Video size switching system and video size switching method facing display terminal |
| CN102665062A (en) * | 2012-03-16 | 2012-09-12 | 华为技术有限公司 | Method and device for stabilizing target object image in video |
| CN102111601B (en) * | 2009-12-23 | 2012-11-28 | 大猩猩科技股份有限公司 | Content-based adaptive multimedia processing system and method |
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