CN102955664A - Method and system for electronic book display adjustment - Google Patents
Method and system for electronic book display adjustment Download PDFInfo
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- CN102955664A CN102955664A CN 201110239152 CN201110239152A CN102955664A CN 102955664 A CN102955664 A CN 102955664A CN 201110239152 CN201110239152 CN 201110239152 CN 201110239152 A CN201110239152 A CN 201110239152A CN 102955664 A CN102955664 A CN 102955664A
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Abstract
The invention provides a system for electronic book display adjustment. The system is applied to an electronic book device which uses a TOF (time of flight) camera to continuously shoot scenes before the electronic book device to obtain scene images and Z-directional depth of field information. The system detects 3D (three-dimensional) face areas in the scene images, determines changes of the distance between the face of a user and the electronic book device during reading according to image data of the 3D face areas, automatically adjusts the display proportion of the content read by the user according to the distance changes, and automatically adjusts display portions of the content read by the user according to changes of positions of the 3D face areas in the scene images. The invention further provides a method for electronic book display adjustment.
Description
Technical field
The present invention relates to a kind of digital content display system and method, especially show Adjustment System and method about a kind of e-book.
Background technology
Electronic book device refers to integrate the hand held readers of the publication of the digitized contents such as storage and display text, picture, sound, image.At present, the user is in the process of using electronic book device, for observation post's reading content more clearly, need to be with electronic book device near user face, or the demonstration control knob (for example amplifying, dwindle button) that provides by the manual operation reader is to adjust the displaying ratio of reading content.In addition, if the user need to read the content of other parts, also need manual adjustment.
Summary of the invention
In view of above content, be necessary to provide a kind of e-book to show Adjustment System and method, can be according to relative position and automatic displaying ratio and the display part of adjusting reading content of distance of user face and electronic book device.
A kind of e-book shows Adjustment System, and this system comprises that parameter arranges module, 3D human face detection module, judge module and shows adjusting module.Parameter arranges module and is used for receiving the demonstration adjustment parameter that arranges, comprise when user's reading electronic book file, the maximum of the gauged distance of user face and electronic book device, bee-line and electronic book documentary shows multiplying power, when the distance of user face and electronic book device equals gauged distance, electronic book documentary shows with original size, when the distance of user face and electronic book device equaled bee-line, electronic book documentary showed that with maximum multiplying power shows.When the distance that parameter arranges user face that module also be used for to receive arranges and electronic book device changed between described bee-line and gauged distance, the convergent-divergent of electronic book documentary was regular.3D human face detection module is determined the current distance of user face and electronic book device for the 3D human face region of the scene scene image that adopts the lasting detecting of 3D human face detection technology TOF video camera shooting electronic book device the place ahead to obtain according to Z direction depth of view information.Judge module is used for judging that whether this current distance is less than described gauged distance.Show adjusting module, be used for when current distance during more than or equal to described gauged distance, electronic book documentary is shown in display screen with original size, current distance is less than or equal to described bee-line, electronic book documentary be multiply by maximum multiplying power with original size be shown in display screen, and current distance is greater than described bee-line and less than described gauged distance, according to the demonstration multiplying power of current distance and convergent-divergent rule adjustment electronic book documentary.Judge module also is used for judging whether the 3D human face region changes in the position of scene image.Show adjusting module, also be used for when the 3D human face region changes in the position of scene image, according to moving direction, displacement and mobile related adjust electronic book documentary current display part moving direction and the displacement on display screen of 3D human face region in scene image.
A kind of e-book display adjusting method.The method comprises: (A) receive the demonstration that arranges and adjust parameter, comprise when user's reading electronic book file, the maximum of the gauged distance of user face and electronic book device, bee-line and electronic book documentary shows multiplying power; When (B) distance of the user face of reception setting and electronic book device changes between described bee-line and gauged distance, the convergent-divergent rule of electronic book documentary; (C) utilize the lasting scene in electronic book device the place ahead is taken of time flight TOF video camera that is installed on electronic book device to obtain scene image and Z direction depth of view information; (D) adopt the lasting 3D human face region of detecting in the scene image of 3D human face detection technology, determine the current distance of user face and electronic book device according to Z direction depth of view information; (E) judge that whether this current distance is less than described gauged distance; (F) if current distance more than or equal to described gauged distance, then electronic book documentary is shown in display screen with original size, if this current distance is less than or equal to described bee-line, then electronic book documentary be multiply by maximum multiplying power with original size and be shown in display screen, if current distance is greater than described bee-line and less than described gauged distance, then according to the demonstration multiplying power of current distance and convergent-divergent rule adjustment electronic book documentary; (G) judge whether the position of 3D human face region in scene image changes; The position of 3D human face region in scene image changes if reach (H), then according to moving direction, displacement and mobile related adjust electronic book documentary current display part moving direction and the displacement on display screen of 3D human face region in scene image.
Compared to prior art, e-book provided by the invention shows that Adjustment System and method can be according to relative position and automatic displaying ratio and the display parts of adjusting reading content of distance of user face and electronic book device.
Description of drawings
Fig. 1 is the applied environment figure that e-book of the present invention shows the Adjustment System preferred embodiment.
Fig. 2 is the functional block diagram that e-book of the present invention shows the Adjustment System preferred embodiment.
Fig. 3 is the process flow diagram of e-book display adjusting method of the present invention preferred embodiment.
Fig. 4 e-book of the present invention shows the schematic diagram of Adjustment System adjustment display parameter.
Fig. 5 and Fig. 6 are the schematic diagram that utilizes TOF video camera photographed scene image.
Fig. 7 adjusts the schematic diagram that electronic book documentary shows multiplying power according to the variation of 3D human face region in the scene image.
The main element symbol description
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100 |
| The TOF |
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| E-book shows |
20 |
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30 |
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40 |
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50 |
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21 |
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| 3D human |
23 |
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25 |
Following embodiment further specifies the present invention in connection with above-mentioned accompanying drawing.
Embodiment
Consulting shown in Figure 1ly, is the applied environment figure that e-book of the present invention shows Adjustment System 20 preferred embodiments.This e-book shows that Adjustment System 20 is applied to electronic book device 100.This electronic book device 100 also comprises time flight (Time of Flight, TOF) video camera 10, storer 30, processor 40 and display screen 50.
In the present embodiment, TOF video camera 10 be installed on display screen 50 directly over (as shown in Figure 5).This TOF video camera 10 can obtain the depth of view information of subject Z direction in the scene image (as shown in Figure 6).The depth of view information of described subject Z direction refers to the range information of the camera lens of subject each point and TOF video camera 10.Because TOF video camera 10 is when the photographic subjects thing, signal with the certain wavelength of emission, when running into object, signal can reflex to the camera lens of TOF video camera 10, can calculate the range information between the each point and camera lens on the object according to signal emission and mistiming between the reception, so this TOF video camera 10 can obtain the range information between the camera lens of subject each point and TOF video camera 10 in the scene image.
A large amount of electronic book documentaries that storer 30 storages are downloaded by network are read for user selection, and storage TOF video camera 10 is taken the scene image that obtains.Display screen 50 shows the electronic book documentary of user selection, for example books or picture.
Consult shown in Figure 2, this e-book shows that Adjustment System 20 comprises that parameter arranges module 21, computing module 22, three-dimensional (three-dimensional, 3D) human face detection module 23, judge module 24 and shows adjusting module 25 (the concrete introduction sees also Fig. 3).Utilize these functional modules, this e-book shows the 3D human face region in the Adjustment System 20 detecting scene images, determine the variable in distance of face and electronic book device 100 in user's reading process according to the image data of 3D human face region, automatically adjust the displaying ratio of user's reading content according to variable in distance, and automatically adjust the display part of user's reading content according to the change in location of 3D human face region in scene image.The described module of the present embodiment is a kind of can be by processor 40 performed and can finish the computer program code segments of fixed function, and it is stored in the storer 30.
Consulting shown in Figure 3ly, is the process flow diagram of e-book display adjusting method of the present invention preferred embodiment.
Step S301, parameter arranges module 21 and receives the demonstration adjustment parameter that arranges, and comprises when user's reading electronic book file, and the maximum of gauged distance, bee-line and the electronic book documentary of user face and electronic book device 100 shows multiplying power.In the present embodiment, when the distance of user face and electronic book device 100 during more than or equal to gauged distance, electronic book documentary shows with original size.When the distance of user face and electronic book device 100 was less than or equal to bee-line, electronic book documentary showed with the described maximum multiplying power that shows.For example, describedly maximum show that multiplying power can be set to " * 5 ", be illustrated on the basis of original size and amplify 5 times of demonstrations.
The distance of user face and electronic book device 100 can be determined according to the depth of view information that TOF video camera 10 is taken the user people's face image Z direction that obtains.For example, the distance of user face and electronic book device 100 can be set to the mean value of all distance values between the camera lens of user face each point and TOF video camera 10, also can be set to the distance value between the camera lens of user face specific position (for example eyes place horizontal line) and TOF video camera 10.
Described gauged distance and bee-line can be a concrete distance value, also can be a distance value scope.For example, gauged distance can be 30 centimetres, also can be 28 centimetres～33 centimetres scope, and bee-line can be 6 centimetres, also can be 5 centimetres～7 centimetres scope.
As shown in Figure 4, e-book of the present invention shows that Adjustment System 20 provides two kinds of patterns, i.e. default mode and User Defined pattern.When the user selection default mode, above-mentioned parameter, for example the maximum of gauged distance, bee-line and electronic book documentary shows multiplying power, is to show the default value that the provider (for example designer) of Adjustment System 20 arranges by e-book.When user selection User Defined pattern, the user can finish the above-mentioned parameter setting by other functional module of TOF video camera 10 and e-book demonstration Adjustment System 20 according to demands of individuals (for example reading habit).For example, start self-defined when described gauged distance is set, the user places electronic book device 100 appropriate location in user face the place ahead, TOF video camera 10 is taken the 3D people's face image that obtains the user, and 3D human face detection module 23 is determined described gauged distance according to the range information between the camera lens of each point and TOF video camera 10 in this 3D people's face image.
For example, suppose to take and obtain individual 3D people's face image, then parameter all distance values between the camera lens of module 21 each point and TOF video camera 10 in 3D people's face image are set mean value as gauged distance, the distance value of perhaps taking between the camera lens of family face specific position (for example eyes place horizontal line) and TOF video camera 10 is gauged distance.Suppose to take and obtain many (for example 10) 3D people's face images, then parameter arranges module 21 and obtains a rough gauged distance (computing method are consulted individual 3D people's face image) according to every 3D people's face image, mean value according to all rough gauged distances obtains gauged distance again, and the codomain that perhaps forms according to all rough gauged distances obtains the gauged distance value.Arranging of the setting of bee-line and gauged distance is similar.
Step S302, when parameter arranged distance that module 21 receives user face that users arrange and electronic book device 100 and changes between described bee-line and gauged distance, the convergent-divergent of electronic book documentary was regular.For example, the distance that the user can arrange user face and electronic book device 100 furthers 2 centimetres to electronic book device 100 at every turn between described bee-line and gauged distance, the displaying ratio of electronic book documentary increases by 0.2 times, zoom out 2 centimetres to electronic book device 100, the displaying ratio of electronic book documentary dwindles 0.2 times at every turn.
The user also can not arrange described convergent-divergent rule, and acquiescence arranges module 21 by parameter and obtains the convergent-divergent rule that computing module 22 calculates.Computing module 22 calculates this convergent-divergent rule according to user face and electronic book device 100 corresponding multiplying power relation when described gauged distance and the bee-line.For example, suppose that user face and electronic book device 100 gauged distance apart are Ds=28 centimetre, corresponding 1 times of multiplying power, user face and electronic book device 100 bee-line Dl=8 apart centimetre, corresponding 5 times of multiplying powers, then scaling R=(28-8) centimetre/5 times=4 centimetres/doubly, be that described convergent-divergent rule is: the distance of user face and electronic book device 100 furthers 4 centimetres to electronic book device 100 at every turn between 28 centimetres of 8 centimetres of described bee-lines and gauged distances, the displaying ratio of electronic book documentary increases by 1 times, zoom out 4 centimetres to electronic book device 100, the displaying ratio of electronic book documentary dwindles 1 times at every turn.
Step S303 utilizes the TOF video camera 10 lasting scene in electronic book device 100 the place aheads is taken to obtain scene image and Z direction depth of view information.
Step S304,3D human face detection module 23 adopts the 3D human face region in the lasting detecting of the 3D human face detection technology scene image, determines the current distance of user face and electronic book device 100 according to Z direction depth of view information.As indicated above, this current distance can be the mean value of all distance values between the camera lens of user face each point and TOF video camera 10, also can be the distance value between the camera lens of user face specific position (for example eyes place horizontal line) and TOF video camera 10.
3D human face detection technology of the present invention is a kind of prior art, its implementation mode is to collect first a large amount of various different 3D people's face image datas, thereby 3D people's face sample of Erecting and improving, with this 3D people's face sample as judging whether scene image comprises the comparison foundation of 3D human face region.For example, 3D human face detection module 23 is analyzed 200 unique points of 3D people's face image of collecting, obtain each unique point to the range data of TOF video camera 10 camera lenses and be converted to pixel value, for example nose to the distance of the Z direction of camera lens is 61 centimetres and is converted into pixel value 255, place between the eyebrows to the distance of the Z direction of camera lens is 59 centimetres and is converted into pixel value 253, etc.3D face template detecting module 23 pixel values with these 200 unique points are stored to the eigenmatrix of this 3D people's face image.Suppose that 3D people's face image one of collecting has 10,3D human face detection module 23 Using such method calculate the eigenmatrix of other 9 3D people's face images, after 10 eigenmatrixes obtaining are alignd according to the pixel value of eyes, pixel value to same characteristic features point in these 10 eigenmatrixes is added up, and the permissible range that obtains the pixel value of each unique point is set up 3D people's face sample.For example, the pixel value scope of nose is [251,255] in these 10 eigenmatrixes, and the pixel value scope of place between the eyebrows is [250,254].
Step S305, judge module 24 judge that whether this current distance is less than described gauged distance.If current distance more than or equal to described gauged distance, then enters step S306, show that adjusting module 25 is shown in display screen 50 with electronic book documentary with original size.Shown in Fig. 7 (I), the electronic book documentary that user selection is read is picture A, if current distance more than or equal to described gauged distance, picture A is with original size complete demonstration on display screen 50.Afterwards, enter step S310.If current distance is less than described gauged distance, execution in step S307 then.
Step S307, judge module 24 judge that whether this current distance is greater than described bee-line.If this current distance is less than or equal to described bee-line, then enter step S308, show that adjusting module 25 multiply by maximum multiplying power with electronic book documentary with original size and is shown in display screen 50.Shown in Fig. 7 (III), if current distance is less than or equal to described ultimate range, picture A shows at display screen 50 after the basis of original size is amplified 5 times because the restriction of display screen 50 indication ranges, the picture A after the amplification can only partial display on display screen 50.Afterwards, enter step S310.If judge module 24 is judged this current distance greater than described bee-line, then execution in step S309.
Step S309 shows that adjusting module 25 is according to the demonstration multiplying power of current distance and convergent-divergent rule adjustment electronic book documentary.As indicated above, suppose that bee-line is 8 centimetres, gauged distance is 28 centimetres, convergent-divergent rule R=(28-8) centimetre/5 times=4 centimetres/doubly, maximum multiplying power is 5 times, and current distance is 24 centimetres, and the demonstration multiplying power of the electronic book documentary after then adjusting=(24-8) centimetre/R=4 doubly, then show adjusting module 25 with electronic book documentary, for example picture A shows (shown in Fig. 7 (II)) at display screen 50 after the basis of original size is amplified 4 times.
Step S310, judge module 24 judge whether the position of 3D human face region in scene image changes.As do not change, then return step S303, if change, execution in step S311 then.
Step S311 shows that adjusting module 25 is according to moving direction, displacement and mobile related adjust electronic book documentary moving direction and the displacement on display screen 50 of 3D human face region in scene image.Described mobile association comprises related (for example opposite direction) of the current display part of file and the moving direction of 3D human face region in scene image, and the displacement of 3D human face region central point in scene image and the current display part of file displacement related on display screen 50.The association of described displacement can be set to human face region central point mobile first distance (for example 0.1 centimetre) current display part of respective file mobile second distance (for example 0.5 centimetre) on display screen 50 in scene image.The association of described displacement also can calculate according to the proportionate relationship of the indication range size of the size of scene image, display screen 50, the size of for example supposing scene image is W1 * H1, the indication range size of display screen 50 is W2 * H2, the described X2/X1=W2/W1 that is associated as then, Y2/Y1=D2 * H2/H1, wherein X1, Y1 represent the displacement of 3D human face region central point X-axis, Y direction in scene image, and X2, Y2 represent 3D human face region central point Y, the axial displacement of Y-axis in scene image.
It should be noted that at last, above embodiment is only unrestricted in order to technical scheme of the present invention to be described, although with reference to preferred embodiment the present invention is had been described in detail, those of ordinary skill in the art is to be understood that, can make amendment or be equal to replacement technical scheme of the present invention, and not break away from the spirit and scope of technical solution of the present invention.
Claims (10)
1. an e-book display adjusting method is characterized in that, the method comprises:
Receive the demonstration that arranges and adjust parameter, comprise when user's reading electronic book file, the maximum of the gauged distance of user face and electronic book device, bee-line and electronic book documentary shows multiplying power;
When the user face that reception arranges and the distance of electronic book device change between described bee-line and gauged distance, the convergent-divergent rule of electronic book documentary;
The lasting scene in electronic book device the place ahead is taken of time flight TOF video camera that utilization is installed on electronic book device obtains scene image and Z direction depth of view information;
Adopt the 3D human face region in the lasting detecting of the 3D human face detection technology scene image, determine the current distance of user face and electronic book device according to Z direction depth of view information;
Judge that whether this current distance is less than described gauged distance;
If current distance is more than or equal to described gauged distance, then electronic book documentary is shown in display screen with original size, if this current distance is less than or equal to described bee-line, then electronic book documentary be multiply by maximum multiplying power with original size and be shown in display screen, if current distance is greater than described bee-line and less than described gauged distance, then according to the demonstration multiplying power of current distance and convergent-divergent rule adjustment electronic book documentary;
Judge whether the position of 3D human face region in scene image changes; And
If the position of 3D human face region in scene image changes, then according to moving direction, displacement and mobile related adjust electronic book documentary current display part moving direction and the displacement on display screen of 3D human face region in scene image.
2. e-book display adjusting method as claimed in claim 1, it is characterized in that, the described rule that arranges is arranged by the user of electronic book device, perhaps concerns according to user face and electronic book device corresponding multiplying power when described gauged distance and the bee-line to calculate.
3. e-book display adjusting method as claimed in claim 1, it is characterized in that, described 3D human face detection technology is to set up 3D people's face sample by collecting in advance a large amount of 3D people's face image datas, with this 3D people's face sample as judging whether scene image comprises the comparison foundation of 3D human face region.
4. e-book display adjusting method as claimed in claim 1, it is characterized in that, described mobile association comprises the related of the moving direction of 3D human face region in scene image and the moving direction of the current display part of electronic book documentary on display screen, and the displacement of 3D human face region central point in scene image and the current display part of electronic book documentary displacement related on display screen.
5. e-book display adjusting method as claimed in claim 4, it is characterized in that, the association of described displacement is set to the 3D human face region central point mobile first distance current display part of corresponding electronic book documentary mobile second distance on display screen in scene image, and perhaps the proportionate relationship according to the indication range size of the size of scene image, display screen calculates.
6. an e-book shows Adjustment System, it is characterized in that, this system comprises:
Parameter arranges module, is used for receiving the demonstration that arranges and adjusts parameter, comprises when user's reading electronic book file, and the maximum of the gauged distance of user face and electronic book device, bee-line and electronic book documentary shows multiplying power;
Parameter arranges module, and when the user face that also be used for to receive arranges changed between described bee-line and gauged distance with the distance of electronic book device, the convergent-divergent of electronic book documentary was regular;
3D human face detection module for the 3D human face region of the scene scene image that adopts the lasting detecting of 3D human face detection technology TOF video camera shooting electronic book device the place ahead to obtain, is determined the current distance of user face and electronic book device according to Z direction depth of view information;
Judge module is used for judging that whether this current distance is less than described gauged distance;
Show adjusting module, when being used for current distance more than or equal to described gauged distance, electronic book documentary is shown in display screen with original size, current distance is less than or equal to described bee-line, electronic book documentary be multiply by maximum multiplying power with original size be shown in display screen, and current distance is greater than described bee-line and less than described gauged distance, according to the demonstration multiplying power of current distance and convergent-divergent rule adjustment electronic book documentary;
Judge module also is used for judging whether the 3D human face region changes in the position of scene image; And
Show adjusting module, also be used for when the 3D human face region changes in the position of scene image, according to moving direction, displacement and mobile related adjust electronic book documentary current display part moving direction and the displacement on display screen of 3D human face region in scene image.
7. e-book as claimed in claim 6 shows Adjustment System, it is characterized in that, the described rule that arranges is arranged by the user of electronic book device, perhaps concerns according to user face and electronic book device corresponding multiplying power when described gauged distance and the bee-line to calculate.
8. e-book as claimed in claim 6 shows Adjustment System, it is characterized in that, described 3D human face detection technology is to set up 3D people's face sample by collecting in advance a large amount of 3D people's face image datas, with this 3D people's face sample as judging whether scene image comprises the comparison foundation of 3D human face region.
9. e-book as claimed in claim 6 shows Adjustment System, it is characterized in that, described mobile association comprises the related of the moving direction of 3D human face region in scene image and the moving direction of the current display part of electronic book documentary on display screen, and the displacement of 3D human face region central point in scene image and the current display part of electronic book documentary displacement related on display screen.
10. e-book as claimed in claim 9 shows Adjustment System, it is characterized in that, the association of described displacement is set to the 3D human face region central point mobile first distance current display part of corresponding electronic book documentary mobile second distance on display screen in scene image, and perhaps the proportionate relationship according to the indication range size of the size of scene image, display screen calculates.
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