CN105607813A

CN105607813A - Mobile terminal and image browsing method

Info

Publication number: CN105607813A
Application number: CN201610066590.7A
Authority: CN
Inventors: 姜顺豹
Original assignee: Nubia Technology Co Ltd
Current assignee: Nubia Technology Co Ltd
Priority date: 2016-01-29
Filing date: 2016-01-29
Publication date: 2016-05-25
Anticipated expiration: 2036-01-29
Also published as: CN105607813B

Abstract

The invention discloses a mobile terminal, comprising a head portrait monitoring module, an included angle calculation module, a rotation angle determining module and an image rotation control module, wherein the head portrait monitoring module is used for monitoring whether a head portrait of another new user enters into a current shooting region or not through a camera; the included angle calculation module is used for calculating an included angle between a vision direction of the new user and a plane of a terminal screen according to a preset calculation manner; the rotation angle determining module is used for determining a rotation angle of a currently browsed image corresponding to a browsing mode in accordance with the included angle and the browsing mode of the current image; the image rotation control module is used for controlling the currently browsed image to rotate for the rotation angle in a rotation direction corresponding to the browsing mode, so as to enable the new user to browse together or prevent the new user from browsing. The invention further discloses an image browsing method. The mobile terminal and the image browsing method have the advantages that the image is conveniently browsed by a plurality of users together or the image currently browsed by one user is prevented from being peeped by others by means of controlling the rotation of the image, and therefore the user experience is improved.

Description

Mobile terminal and picture browsing method

Technical field

The present invention relates to communication technical field, relate in particular to mobile terminal and picture browsing method.

Background technology

Under normal circumstances, user be all alone on terminal device browsing pictures (such as in Album for glancing over picturesPhoto), but sometimes may need to browse together with multiple users, and if the screen of terminal device is less, thanAs mobile terminal, be difficult to take into account the picture browsing angle that each user is different, such as facing endViewing experience the best of the user of end screen, other positions user's viewing experience is poor. In addition, asFruit user browses alone some privacy pictures, exists by other people and peeps possibility, thereby have influence onExperience when user's browsing pictures.

Summary of the invention

Main purpose of the present invention is to provide a kind of mobile terminal and picture browsing method, is intended to solve existingHave in technology, to be not easy to multiple users and easily to be peeped by people when browsing pictures and browsing pictures simultaneously, therebyAffect the technical problem of user's experience.

For achieving the above object, the invention provides a kind of mobile terminal, described mobile terminal comprises camera,Described mobile terminal also comprises:

Head portrait monitoring modular, in the time that current at least one primary user carries out picture browsing, by shootingIn the current camera watch region of head monitoring, whether exist other new users' head portrait to enter, wherein, described primary userHead portrait, new user's head portrait on the screen of described mobile terminal, do not show;

Angle computing module, for when being monitored and had other new users in current camera watch region by cameraHead portrait while entering, according to default account form, calculate described new user's direction of visual lines and described screenAngle between the plane of place;

Anglec of rotation determination module, for according to described angle and the current figure browsing of current described primary userThe browse mode of sheet, determines the anglec of rotation with the corresponding current picture of browsing of described browse mode;

Picture rotation control module, for controlling the current picture of browsing according to corresponding with described browse modeDirection of rotation rotate the described anglec of rotation, jointly browse or prevent described new user for described new userBrowse.

Optionally, described angle computing module comprises:

Head portrait coordinate acquiring unit, is monitored in current camera watch region and is had it by described camera for working asWhen he new user's head portrait enters, the area coordinate of the head portrait that obtains described new user on described screen,Described area coordinate comprises that head portrait represents coordinate;

Angle computing unit, for represent the center point coordinate of coordinate and described screen according to described head portrait,By default angle computing formula, calculate described angle.

Optionally, described browse mode comprises anti-peeping browse mode, tracking-browsing pattern; Described rotationAngle determination module specifically for:

If the browse mode of the picture that current described primary user browses is anti-peeping browse mode, determineThe anglec of rotation of the current picture of browsing equals described angle; And if current described primary user browsesThe browse mode of picture is tracking-browsing pattern, determines that the anglec of rotation of the current picture of browsing equals instituteState the corresponding complementary angle of angle.

Optionally, described mobile terminal also comprises:

Initialization module, in the time starting picture browsing, opens described camera and initializes user's rowTable, described user list is for preserving user's relevant information;

User list module, is monitored in current camera watch region and is had user's by described camera for working asWhen head portrait enters, this user's entering order is numbered and by this user's Customs Assigned Number and this userWhen browsing pictures, corresponding picture rotation angle is saved in described user list; And described in ought passing throughCamera is monitored while existing user's head portrait to exit in current camera watch region, from described user list, deletesThe corresponding described picture rotation angle of this user's Customs Assigned Number and this user, and upgrade described user's rowThe Customs Assigned Number of other users in table after this user's entering order.

Optionally, under tracking-browsing pattern, described picture rotation control module also for:

Every setting-up time, successively according to newly entering other user except current in described user listThe reversed arrangement order of user's Customs Assigned Number, controls the current picture rotation of browsing and arrives and described other useThe corresponding described picture rotation angle of Customs Assigned Number at family.

Further, for achieving the above object, the present invention also provides a kind of picture browsing method, is applied toMobile terminal, described mobile terminal comprises camera, described picture browsing method comprises:

In the time that current at least one primary user carries out picture browsing, monitor current camera watch region by cameraInside whether exist other new users' head portrait to enter, wherein, described primary user's head portrait, new user's headPicture does not show on the screen of described mobile terminal;

If so, according to default account form, calculate described new user's direction of visual lines and described screen instituteAngle between plane;

According to the browse mode of described angle and the current picture of browsing of current described primary user, determine and instituteState the anglec of rotation of the corresponding current picture of browsing of browse mode;

Control the current picture of browsing according to rotating described rotation with the corresponding direction of rotation of described browse modeAngle, jointly browses or prevents that described new user from browsing for described new user.

Optionally, described when monitoring by camera the head portrait that has other new users in current camera watch regionWhile entering, according to default account form, direction of visual lines and the described screen place of calculating described new user are flatAngle between face comprises:

When monitoring by described camera while existing other new users' head portrait to enter in current camera watch region,The area coordinate of the head portrait that obtains described new user on described screen, described area coordinate comprises head portrait generationTable coordinate;

Represent the center point coordinate of coordinate and described screen according to described head portrait, by default angle meterCalculate formula, calculate described angle.

Optionally, described browse mode comprises anti-peeping browse mode, tracking-browsing pattern; Described basisThe browse mode of described angle and the current picture of browsing of current described primary user, determine with described in browse mouldThe anglec of rotation of the corresponding current picture of browsing of formula comprises:

If the browse mode of the picture that current described primary user browses is anti-peeping browse mode, determineThe anglec of rotation of the current picture of browsing equals described angle;

If the browse mode of the picture that current described primary user browses is tracking-browsing pattern, determines and work asBefore the anglec of rotation of the picture browsed equal the corresponding complementary angle of described angle.

Optionally, described in the time that current at least one primary user starts to carry out picture browsing, pass through cameraMonitor and in current camera watch region, whether exist other new users' head portrait to comprise before entering: starting pictureWhile browsing, open described camera and initialize user list, described user list is for preserving user'sRelevant information;

Wherein, the step described user's relevant information being saved in described user list comprises:

When monitoring by described camera while existing user's head portrait to enter in current camera watch region, to this useThe entering order at family is numbered and is corresponding during by this user's Customs Assigned Number and this user's browsing picturesPicture rotation angle is saved in described user list;

When monitoring by described camera while existing user's head portrait to exit in current camera watch region, from describedIn user list, delete this user's Customs Assigned Number and the corresponding described picture rotation angle of this user, andUpgrade the Customs Assigned Number of other users after this user's entering order in described user list.

Optionally, under tracking-browsing pattern, the current picture of browsing of described control is according to browsing with describedThe corresponding direction of rotation of pattern comprises after rotating the described anglec of rotation:

In the present invention, in user's browsing pictures, whether have new user's by camera head monitorAdd, thereby realize the detection to other users. In addition, after new user adds and browses, by calculatingNewly add the angle between direction of visual lines and the screen place horizontal plane of access customer, thereby control current browsingPicture carries out while realizing the common browsing pictures of multiple users, meeting many with corresponding with the corresponding rotation of this angleThe viewing experience of individual user's different angles, or prevent that other users from peeping, thus promote user's browse graphExperience in sheet process.

Brief description of the drawings

Fig. 1 is the hardware configuration schematic diagram of realizing an optional mobile terminal of each embodiment of the present invention;

Fig. 2 is the high-level schematic functional block diagram of mobile terminal the first embodiment of the present invention;

Fig. 3 is the user's head portrait position view in mobile terminal one application scenarios embodiment of the present invention;

Fig. 4 is that in mobile terminal one application scenarios embodiment of the present invention, user's direction of visual lines and screen place are flatAngle schematic diagram between face;

Fig. 5 is the refinement high-level schematic functional block diagram of angle computing module in Fig. 2;

Fig. 6 is that in mobile terminal one application scenarios embodiment of the present invention, the position of user's head portrait on screen showsIntention;

Fig. 7 is picture rotation angle schematic diagram in mobile terminal one application scenarios embodiment of the present invention;

Fig. 8 is the high-level schematic functional block diagram of mobile terminal the second embodiment of the present invention;

Fig. 9 is the schematic flow sheet of picture browsing method the first embodiment of the present invention;

Figure 10 is the refinement schematic flow sheet of step S20 in Fig. 9;

Figure 11 is the schematic flow sheet of picture browsing method the second embodiment of the present invention;

Figure 12 is the schematic flow sheet of picture browsing method of the present invention the 3rd embodiment.

Realization, functional characteristics and the advantage of the object of the invention, in connection with embodiment, are done further with reference to accompanying drawingExplanation.

Detailed description of the invention

Should be appreciated that specific embodiment described herein is only in order to explain the present invention, and be not used in restrictionThe present invention.

The mobile terminal of realizing each embodiment of the present invention is described referring now to accompanying drawing. In follow-up descriptionIn, use the suffix such as " module ", " parts " or " unit " that is used for representing element only in order to haveBe beneficial to explanation of the present invention, itself do not have specific meaning. Therefore, " module " can mix with " parts "Close and use.

Mobile terminal can be implemented with various forms. For example, the terminal of describing in the present invention can compriseSuch as mobile phone, smart phone, notebook computer, digit broadcasting receiver, PDA, (individual digital helpsReason), PAD (panel computer), PMP (portable media player), guider etc. eventually mobileEnd and such as the fixed terminal of digital TV, desktop computer etc. Suppose that terminal is eventually mobile below,End. But, it will be appreciated by those skilled in the art that the element except being used in particular for mobile object,Structure according to the embodiment of the present invention also can be applied to the terminal of fixed type.

Fig. 1 is the hardware configuration schematic diagram of realizing an optional mobile terminal of each embodiment of the present invention.

Mobile terminal 100 can comprise wireless communication unit 110, A/V (audio/video) input block 120,Output unit 130, memory 140, controller 150 and head portrait monitoring modular 310, angle computing module320, anglec of rotation determination module 330, picture rotation control module 340. Fig. 1 shows has various groupsThe mobile terminal of part, it should be understood that, and does not require all assemblies that illustrate of enforcement. Can substituteMore or less assembly is implemented on ground. Will be discussed in more detail below the element of mobile terminal.

Wireless communication unit 110 generally includes one or more assemblies, and it allows mobile terminal 100 with wirelessRadio communication between communication system or network. For example, wireless communication unit can comprise mobile communicationAt least one in module 111, wireless Internet module 112.

Mobile communication module 111 by radio signal send to base station (for example, access point, Node B etc.),At least one in exterior terminal and server and/or receive radio signals from it. Such radioSignal can comprise voice call signal, video calling signal or according to text and/or Multimedia MessageThe various types of data that send and/or receive.

Wireless Internet module 112 is supported the Wi-Fi (Wireless Internet Access) of mobile terminal. This module can be inner orExternally be couple to terminal. The related Wi-Fi (Wireless Internet Access) technology of this module can comprise WLAN (nothingLine LAN) (Wi-Fi), Wibro (WiMAX), Wimax (worldwide interoperability for microwave access), HSDPA (at a high speedDownlink packets access) etc.

A/V input block 120 is for audio reception or vision signal. A/V input block 120 can comprise phaseMachine 121, camera 121 is to the static map being obtained by camera in Video Capture pattern or image capture modeThe view data of sheet or video is processed. Picture frame after treatment may be displayed on display unit 151.Can be stored in memory 160 (or other storage medium) or warp through camera 121 picture frame after treatmentSent by wireless communication unit 110, can provide two or more cameras according to the structure of mobile terminal121。

Output unit 130 is constructed to provide output signal (for example, with vision, audio frequency and/or tactile mannerAudio signal, vision signal, alarm signal, vibration signal etc.). Output unit 130 can comprise demonstrationUnit 131 etc.

Display unit 131 may be displayed on the information of processing in mobile terminal 100. For example, work as mobile terminal100 in the time of telephone relation pattern, and display unit 131 can show and call or other (for example, literary composition of communicating by letterThis information receiving and transmitting, multimedia file are downloaded etc.) relevant user interface (UI) or graphic user interface(GUI). When mobile terminal 100 is during in video calling pattern or image capture mode, display unit 131Can the image of display capture and/or the image of reception, illustrate video or image and correlation function UI orGUI etc.

Meanwhile, in the time that display unit 131 and touch pad superpose to form touch-screen with the form of layer each other, aobviousShow that unit 131 can be used as input unit and output device. Display unit 131 can comprise liquid crystal display(LCD), thin film transistor (TFT) LCD (TFT-LCD), Organic Light Emitting Diode (OLED) display, flexible aobviousShow at least one in device, three-dimensional (3D) display etc. Some in these displays can be constructed toTransparence is to allow user to watch from outside, and this can be called transparent display, typical transparent displayIt can be for example TOLED (transparent organic light emitting diode) display etc. According to the specific enforcement of wantingMode, mobile terminal 100 can comprise two or more display units (or other display unit), for example,Mobile terminal can comprise outernal display unit (not shown) and inner display unit (not shown). Touch-screen canFor detection of touching input pressure and touch input position and touch input area.

Memory 140 can be stored processing and the software program of control operation etc. carried out by controller 150Deng, or can temporarily store the data that oneself maybe will export through output (for example, telephone directory, message,Still image, video etc.). And memory 140 can be stored about in the time that touch is applied to touch-screenThe vibration of variety of way and the data of audio signal of output.

Memory 140 can comprise the storage medium of at least one type, described storage medium comprise flash memory,Hard disk, multimedia card, card type memory (for example, SD or DX memory etc.), random access storage device(RAM), static random-access memory (SRAM), read-only storage (ROM), electrically erasableRead-only storage (EEPROM), programmable read only memory (PROM), magnetic storage, disk, lightDish etc. And, mobile terminal 100 can with the memory function that is connected execute store 140 by networkNetwork storage device cooperation.

Controller 150 is controlled the overall operation of mobile terminal conventionally. For example, controller 150 is carried out and voiceThe control that call, data communication, video calling etc. are relevant and processing. Controller 150 can execution patternIdentifying processing, with the handwriting input of carrying out on touch-screen or picture are drawn input be identified as character orImage.

Head portrait monitoring modular 310 is in the time that current at least one primary user starts to carry out picture browsing, logicalCross camera and monitor in current camera watch region and whether exist other new users' head portrait to enter, wherein, described inPrimary user's head portrait, new user's head portrait do not show on the screen of described mobile terminal; Angle calculates mouldPiece 320 is for when monitoring by camera while existing other new users' head portrait to enter in current camera watch region,According to default account form, calculate between described new user's direction of visual lines and described screen place planeAngle; Anglec of rotation determination module 330 is for according to described angle and current the browsing of current described primary userThe browse mode of picture, determine the anglec of rotation with the corresponding current picture of browsing of described browse mode;Picture rotation control module 340 is for controlling the current picture of browsing according to corresponding with described browse modeDirection of rotation is rotated the described anglec of rotation, jointly browses or prevents that described new user is clear for described new userLook at.

Various embodiment described herein can be for example to use computer software, hardware or its any groupThe computer-readable medium closing is implemented. For hardware implementation, embodiment described herein can pass throughUse application-specific IC (ASIC), digital signal processor (DSP), digital signal processing device(DSPD), programmable logic device (PLD), field programmable gate array (FPGA), processor, controlDevice, microcontroller, microprocessor, be designed to carry out in the electronic unit of function described herein extremelyFew one is implemented, and in some cases, such embodiment can be implemented in controller 150. RightIn implement software, can carry out at least one function or behaviour with permission such as the embodiment of process or functionThe independent software module of doing is implemented. Software code can be by writing with any suitable programming languageSoftware application (or program) is implemented, and software code can be stored in memory 140 and by controllingDevice 150 is carried out.

Based on above-mentioned mobile terminal hardware configuration and communication system, mobile terminal of the present invention and picture are proposedEach embodiment of browsing method.

With reference to Fig. 2, Fig. 2 is the high-level schematic functional block diagram of mobile terminal the first embodiment of the present invention. This enforcementIn example, described mobile terminal comprises that camera 300 and this camera 300 are for being arranged on the screen of mobile terminalCurtain one side, as the front-facing camera of mobile phone.

In addition, described mobile terminal also comprises:

Head portrait monitoring modular 310, in the time that current at least one primary user carries out picture browsing, by taking the photographIn the current camera watch region of picture head monitoring, whether exist other new users' head portrait to enter, wherein, described primaryThe head portrait at family, new user's head portrait do not show on the screen of described mobile terminal;

In the present embodiment, primary user is mobile terminal owner or monitoring first after camera starts specificallyThe user who arrives such as owner invites multiple user's browsing pictures simultaneously, supervises first in the time that camera startsThe primary user who measures comprises owner and the user who invites thereof. In addition, camera watch region specifically refers to shooting300 regions that can photograph are concrete relevant to the hardware setting of camera 300. In the present embodimentSuppose that the angular range that camera 300 can be taken is 0～180 °, also suppose user as long as at cameraBefore 300, be all in the camera watch region of camera 300, as shown in Figure 3, user's head portrait is in placePut M, P, Q, N are upper can be photographed by video camera 300.

In addition, in the present embodiment, only when head portrait monitoring modular 310 passes through camera 300 at camera watch regionWhen user's head portrait (being also that user passes through eyes browsing pictures) inside detected, can be defined as current depositingAdd browsing pictures other new users, and the mode detecting for head portrait is same as the prior art, therefore,Do not do too much and repeat, such as face recognition technology etc.

In addition, in the present embodiment, the taken all users' of camera 300 head portrait is not movingOn the screen of moving terminal, show to avoid to conflict mutually with user's browsing pictures, but it should be noted that,Mobile terminal is the position coordinates that can know head portrait shown region on screen of user.

Angle computing module 320, for when being monitored and had other new use in current camera watch region by cameraWhen the head portrait at family enters, according to default account form, calculate described new user's direction of visual lines and described screenAngle between the plane of curtain place;

Angle α between user's direction of visual lines as shown in Figure 4 and screen place plane. In the present embodimentAngle computing module 320 specifically can calculate angle α, the tool of this account form according to default account formBody is realized and not being limit. For example, can calculate screen center by camera 300 puts between user's head portraitDistance c, and then calculate screen center by camera 300 and put between the plane of user's head portrait placeApart from a, such as, during due to user's browsing pictures generally from the distance of the screen of mobile terminal all very close to, because ofThis can regard user's body as the plane at user's head portrait place, thereby according to the angle in right angled triangleComputing formula can obtain angle α=arccos (a/c). Or such as the position on screen according to user's head portraitThe corresponding relation of putting between coordinate and user's head portrait physical location calculates angle α.

Anglec of rotation determination module 330, for according to described angle and current described primary user is current browsesThe browse mode of picture, determines the anglec of rotation with the corresponding current picture of browsing of described browse mode;

In the present embodiment, multiple browse mode can be set to be suitable for user's different user demands, such as establishingPut tracking-browsing pattern, when multiple users can obtain when browsing pictures best clear under this patternLook at experience (such as watching angle the best of picture); Or anti-peeping pattern is set, when user is at this mouldWhen formula browsing pictures, can avoid being seen by other users the picture of being browsed, thus protection user's privacySafety. Therefore in the present embodiment, if will realize corresponding function under above-mentioned different viewing modes, needWill by anglec of rotation determination module 330 determine different user's direction of visual lines and screen place plane itBetween lower of angle to the anglec of rotation in requisition for picture rotation.

Conventionally, when user's browsing pictures content, only have image content in the time of user, user just can browseTo the content on picture, and when image content is not during towards user, cannot browse on picture userContent. Therefore, can be according to above-mentioned feature, determine the different user angle α institute under different viewing modesTo the angle of rotating in requisition for picture. Such as, in the time that browse mode is anti-peeping pattern, if current clearThe content of the picture of looking at is towards user, adds while browsing when camera 300 detects other users, canBy 180 ° of picture rotations, also by picture upset, thereby make user cannot browse to the content on picture,And then to protect primary user's privacy.

Picture rotation control module 340, for control the current picture of browsing according to described browse mode phaseThe direction of rotation of answering is rotated the described anglec of rotation, jointly browses or prevent described new use for described new userBrowse at family.

In the present embodiment, when anglec of rotation determination module 330 determines that newly adding the corresponding picture of access customer revolvesAfter gyration, can by picture rotation control module 340 control the current picture of browsing according to settingThe corresponding direction of rotation of browse mode rotate the described anglec of rotation, for newly add access customer jointly browse work asFront picture or prevent from newly adding access customer and peep the image content that primary user browses. In addition, needBright, the anglec of rotation specifically starts to calculate from the picture original position of control picture rotation, and schemesThe setting of the original position of sheet rotation is not limit, and specifically arranges according to actual needs, for example, by picture instituteIn the time of plane and screen place plane parallel, as the original position of picture rotation, or the last time is rotatedAngle position, rear picture place is as the original position of this picture rotation.

Further alternative, described browse mode comprises anti-peeping browse mode, tracking-browsing pattern. ClearThe pattern of looking at can be preset by user, such as file being carried out to the setup of attribute of browse mode, this articleThe lower all pictures of part folder corresponding browse mode and file in the time browsing are consistent.

In this optional embodiment, under anti-peeping browse mode, can prevent other users by rotating imagePeep and browse the image content that active user browses; And under tracking-browsing pattern, pass through rotating imageCan be convenient between multiple users common browsing pictures content and ensure that each user has the best vision of browsingExperience.

In the present embodiment, picture rotation control module 340 institute in the time controlling the current picture rotation of browsing is rightThe direction of rotation of answering is corresponding with the browse mode of photo current. Such as, be anti-peeping browse mode if current,Picture rotation control module 340 need to be controlled image content and not be shown to the user who newly adds, and also schemesSheet rotation control module 340 control picture under current display position (such as image content is just to primaryFamily) rotate the place display position after the corresponding anglec of rotation, the user who newly adds cannot browse to figureSheet content, thus can the corresponding picture rotation direction of determining under this anti-peeping browse mode.

In the present embodiment, in user's browsing pictures, head portrait monitoring modular 310 is by camera 300Whether monitoring there is adding of new user, thereby realizes the detection to other users. In addition, new userAfter adding and browsing, calculate the direction of visual lines and the screen place that newly add access customer by angle computing module 320The determined picture rotation angle of angle between horizontal plane and anglec of rotation determination module 330, therebyBy picture rotation control module 340 control the current picture of browsing carry out with the corresponding rotation of this angle withCorresponding while realizing the common browsing pictures of multiple users, meet the viewing experience of multiple user's different angles, orPerson prevents that other users from peeping, thereby promotes the experience in user's browsing pictures process.

With reference to Fig. 5, Fig. 5 is the refinement high-level schematic functional block diagram of angle computing module in Fig. 2. Based on above-mentionedEmbodiment, in the present embodiment, described angle computing module 320 comprises:

Head portrait coordinate acquiring unit 3201, monitors current camera watch region internal memory for working as by described cameraIn the time that other new users' head portrait enters, the region of the head portrait that obtains described new user on described screen satMark, described area coordinate comprises that head portrait represents coordinate;

In the present embodiment, obtain by head portrait coordinate acquiring unit 3201 head portrait that newly adds access customer and movingArea coordinate on terminal screen, the as shown in Figure 6 head portrait of user A institute on mobile terminal screenRegion, supposes the initial point that screen upper left corner O point is the corresponding XY axle of screen two-dimensional coordinate system,This user's head portrait region can use coordinate A (x1, y1, x2, y1) to represent, wherein, x1, x2 is for usingThe corresponding maximum of head portrait of family A, minimum X-axis coordinate; Y1, y1 corresponds to maximum, minimum Y-axisCoordinate. In addition, the central point that C point (c1, c2) is screen as shown in Figure 6, head portrait represents coordinate aPoint (x_a，y_a) be preferably the central point of area coordinate A (x1, y1, x2, y1), can certainly beOther coordinate points in area coordinate A, such as any one coordinate points of X-axis coordinate figure minimum.

Angle computing unit 3202, for representing the central point of coordinate and described screen according to described head portraitCoordinate, by default angle computing formula, calculates described angle.

As shown in Figure 6, suppose that the line direction that the central point C of user A and screen is ordered corresponds to user'sDirection of visual lines, the angle β described in Fig. 7 corresponds between user's direction of visual lines and screen place planeAngle. Concrete by the angle of formula calculating below β in the present embodiment:

Angle β=90 °-k₁*(X₁/X₀) * 90 ° of formula 1;

Wherein, k₁For constant, X₁For head portrait represents the horizontal stroke that the transverse axis coordinate figure of coordinate points is put to screen centerDistance between axial coordinate value, X₀For the transverse axis coordinate figure of screen center's point, now formula 1 calculatesAngle β be positive;

In addition, in the present embodiment, due to user's head portrait may appear at screen center's point left side orPerson right side, and in above-mentioned formula 1, can not reflect the orientation that user's head portrait occurs, therefore, also canSpecifically to calculate the relative angle γ of angle β by formula 2 below, wherein, relative angle γ represents to useAngle between the direction of visual lines at family and the straight line of normal to screen.

Relative angle γ=k₂*(X₂/X₀) * 90 ° of formula 2;

Wherein, k₂For constant, X₂For deducting head portrait, the transverse axis coordinate figure of screen center's point represents coordinate pointsTransverse axis coordinate figure, X₀For the transverse axis coordinate figure of screen center's point, what now formula 2 calculated is relativeAngle γ may be positive, may be also negative value, such as user's head portrait is in screen when left side, relativelyAngle γ is positive, is negative value in the time of right side.

Optionally, k₁=1. Taking formula 1 as example, as shown in Figure 3, suppose what camera 300 can be takenAngular range is 0～180 °, and user can be clapped by video camera 300 on position M, P, Q, NTake the photograph. Wherein, user in the time of M position, now X₁Can regard as and equal X₀, user's direction of visual linesAnd the angle β between the plane of screen place is 0 °; And user is in the time of N position, now X₁Can regard asEqual X₀, the angle β between user's direction of visual lines and screen place plane is 0 °; And user is at QWhen the position, now X₁Can regard as and equal 0, the folder between user's direction of visual lines and screen place planeAngle β is 90 °, and user corresponding angle β=90 °-k in the time of P position₁*(X₁/X₀)*90°>0°。

Optionally, k₂=1. Taking formula 2 as example, as shown in Figure 3, user in the time of M position, now X₂Can regard as and equal X₀, the relative angle γ between user's direction of visual lines and screen place plane is 90 °;And user is in the time of N position, now X₁Can regard as and equal 2*X₀, user's direction of visual lines and screen instituteRelative angle γ between plane is-90 °; And user is in the time of Q position, now X₁Can regard as etc.In 0, the relative angle γ between user's direction of visual lines and screen place plane is 0 °; And user is at PCorresponding relative angle γ=k when position₂*(X₂/X₀) * 90 ° > 0 °. In this optional embodiment, adoptFixing picture rotation direction can be directly set with formula 2, such as, under anti-peeping browse mode,Picture is rotated counterclockwise, and under tracking-browsing pattern, picture turns clockwise. For example,, if in anti-theftPeeping under browse mode, when user's head portrait of P position detected, is also relative angle γ ° > 0 ° time, thisTime can be rotated counterclockwise an angle that is greater than zero, thereby prevent from being peeped; And if under tracking-browsing pattern,The angle that is greater than zero that can turn clockwise, thus allow user can obtain best viewing angle.

In the present invention, a lot of for the mode of calculating angle, and concrete by camera 300 in the present embodimentThe centre coordinate of the corresponding screen area coordinate of the user's head portrait that generates and screen, then by defaultComputing formula calculate. It should be noted that, because user's change in location is corresponding with user's head portraitChanges in coordinates on screen is not linear, but can be similar to and be regarded as the linear variation of equal proportion by test,Therefore, the angle that the formula 1,2 in the present embodiment obtains not is exact value, but approximation, because ofAnd can't be too large for the angular error of controlling picture rotation in the present invention, therefore above-mentioned computing formula isFeasible.

Further alternative, in mobile terminal one embodiment of the present invention, described anglec of rotation determination module330 specifically for: if the browse mode of the picture that current described primary user browses is the anti-peeping mould of browsingFormula, determines that the anglec of rotation of the current picture of browsing equals described angle; And if current described primaryThe browse mode of the picture that browse at family is tracking-browsing pattern, determines the rotation of the current picture of browsingAngle equals the corresponding complementary angle of described angle.

The angle specifically being calculated with formula 1 in the present embodiment is illustrated, but does not limit otherThe angle that formula obtains is for example, if adopt formula 2 to calculate obtained relevant angle, correspondingThe anglec of rotation also need be based on same with relative angle calculating benchmark, do not do too much and repeat at this.

Conventionally, in the time that picture place plane (image content is towards user) is vertical with user's direction of visual lines,Visual effect the best of user's browsing pictures, and in the time that picture place plane is parallel with user's direction of visual lines orWhen person user's sight line can only be seen the back side of picture, can prevent that user from peeping the content on picture. CauseNo matter this, be to adopt which kind of formula to calculate angle and the anglec of rotation, as long as can reach above-mentioned requirements,Also under anti-peeping browse mode, make user's direction of visual lines vertical with postrotational picture, and followingUnder browse mode, make user's direction of visual lines parallel with picture place screen.

In the present embodiment, if the browse mode of the picture that current described primary user browses is anti-peeping browsingPattern, determines that the anglec of rotation of the current picture of browsing equals described angle, is also that picture is from normally clear(image content is just to user and picture place plane is parallel with screen place screen or same flat to look at positionIn face) can make picture place plane and user's direction of visual lines put down after the rotation angle identical with angle βOK, or also can rotate an anglec of rotation that is greater than angle β, thereby user's sight line can only be seenThe back side of picture and prevent that other users from peeping, as shown in Figure 7.

In the present embodiment, if the browse mode of the picture that current described primary user browses is tracking-browsing mouldFormula, determines that the anglec of rotation of the current picture of browsing equals the corresponding complementary angle of described angle. Also scheme(image content is just parallel with screen place screen to user and picture place plane from normal browsing position for sheetOr in same plane) rotation identical with the complementary angle (complementary angle and angle β sum equal 90 °) of angle βAngle after can make picture place plane (image content is towards user) vertical with user's direction of visual linesAnd make user can obtain the angle of best browsing pictures, thereby while improving the common browsing pictures of many peopleExperience.

Further alternative, if when the head portrait that monitors multiple new users by camera enters, control180 ° of picture rotations or control screen blank screen. This optional embodiment is the control mode under special case,But the present invention can meet picture browsing demand under normal circumstances.

The present embodiment is only paired into and calculates 1 time corresponding picture rotation angle of angle formulae, but the present inventionBe not limited to the formula that other calculate angle and picture rotation angle. In addition need to further illustrate,, in the present embodiment, corresponding rotation starting position is fixed when picture rotation, is all from pictureStarting to calculate the anglec of rotation from normal browsing position, is also that the size of the anglec of rotation of picture corresponds to figureCorner dimension between sheet place plane and screen place plane. In addition, owing to passing through angle computing formula 1The picture rotation angle obtaining be angle value and do not represent rotation direction, therefore, the rotation of pictureDirection specifically need to be relevant to the corresponding area coordinate of the head portrait that newly adds access customer. For example,, anti-peepingUnder browse mode, if user's head portrait appears at the left side of screen center's point, need to be rotated counterclockwise, and ifAppearing at right side turns clockwise.

With reference to Fig. 8, Fig. 8 is the high-level schematic functional block diagram of mobile terminal the second embodiment of the present invention. Based on upperState embodiment, in the present embodiment, described mobile terminal also comprises:

Initialization module 350, in the time starting picture browsing, opens described camera and initializes userList, described user list is for preserving user's relevant information;

In the present embodiment, user starts picture browsing application by mobile terminal and when browsing pictures, passes throughInitialization module 350 is opened camera 300, user list initialized simultaneously, wherein, Yong HulieTable u1, and u2, u3 ..., un} is for preserving user's relevant information, such as entering of user's browsing picturesEnter order, angle β, picture rotation angle etc. In the time that initialization module 350 initializes user list,User list initial value is empty.

User list module 360, is monitored in current camera watch region and is had user by described camera for working asHead portrait while entering, this user's entering order is numbered and by this user's Customs Assigned Number and this useWhen family browsing pictures, corresponding picture rotation angle is saved in described user list; And when passing through instituteState camera and monitor while existing user's head portrait to exit in current camera watch region, from described user list, deleteExcept this user's Customs Assigned Number and the corresponding described picture rotation angle of this user, and upgrade described userThe Customs Assigned Number of other users in list after this user's entering order.

In the present embodiment, picture rotation angle is identical with the implication of the anglec of rotation in above-described embodiment, alsoThe corresponding anglec of rotation when controlling picture rotation and making user's direction of visual lines vertical with picture place screenDegree. Be specially un{n for the user profile in user list, a}, wherein, n represents that camera 300 supervisesThe numbering of the user's entering order measuring, corresponding picture rotation angle when a represents user's browsing pictures.

The user who monitors for camera 300 in the present embodiment enters and has two kinds of special case:

Situation 1: camera 300 monitors first multiple users and enters browsing pictures simultaneously; In this type of situationUnder, generally can regard as all users is all primary user, also allows the user of browsing pictures, therefore willThe all users that monitor first regard an overall user as and be numbered 1 or respectively serial number be 1,2,3 etc., under this type of situation, corresponding picture rotation angle initialization is 0 simultaneously, is also that picture is normalShow and do not do any rotation;

Situation 2: camera 300 is non-to be monitored first multiple users and enter browsing pictures simultaneously; In these type of feelingsUnder shape, can be numbered tackling each user, for example, enter 3 people, such as being numbered 31 simultaneouslyNumber, No. 32, No. 33, if tracking-browsing pattern is preserved each user corresponding picture rotation angle separatelyDegree, if anti-peeping browse mode can be set the corresponding picture rotation angle of each user, unification is180 °, also by 180 ° of back of picture rotation to all users, thereby prevent No. 31, No. 32,33Number user peeps, or also can not be numbered the plurality of user, and directly controls screen blank screen.In addition, do not do too much and repeat for normally enter situation (also entering a new user) at every turn.

In the present embodiment, the user who monitors for camera 300 exits and also has a kind of special case:Camera 300 monitors multiple users and exits browsing pictures simultaneously; Under such situation, if the plurality of useFamily shares same Customs Assigned Number, directly the plurality of user's user profile is deleted, and upgrades that these are manyOther Customs Assigned Numbers after individual user institute respective user numbering. For example,, if there are 3 volumes that user is correspondingNumber be 1, the Customs Assigned Number that is numbered 2 be updated to 1, the Customs Assigned Number that is numbered 3 is updated to 2,By that analogy follow-up. And if the plurality of user distinguishes a corresponding Customs Assigned Number, directly by the plurality of useThe user profile at family is deleted, and upgrades other Customs Assigned Numbers after the plurality of user institute respective user numbering.For example No. 31, No. 33 user exits, and No. 32 are updated to No. 31, and No. 34 are updated to No. 32,Be updated to No. 33 by No. 35, by that analogy follow-up. In addition, (also each for normally exiting situationExit a new user) do not do too much and repeat.

In the present embodiment, by user list so that user profile is numbered to storage, thereby be convenient to figureThe rotation of sheet is controlled. Under normal circumstances, under anti-peeping browse mode, only have primary user just to carry out figureSheet is browsed, and therefore the variation of the anglec of rotation of picture can be not too many, and next due to use in tracking-browsing patternFamily more corresponding picture rotation angle is also more, is therefore stored and can be facilitated multiple users common by numberingWhen same browsing, realize the control to picture rotation. Such as, in active user's list, store multiple usersAnd while being tracking-browsing pattern, picture rotation control module 340 is according to the user profile in user list,And then realize the control of the anglec of rotation to each pictures, thereby it is best that each user can be obtainedVision is appreciated angle, and then improves user's experience.

Further alternative, in mobile terminal one embodiment of the present invention, under tracking-browsing pattern, figureSheet rotated control module 340 before controlling picture rotation, all users in Real-time Obtaining user listInformation, and then according to Customs Assigned Number, show successively corresponding postrotational picture, wherein, picture rotationProcess do not show, picture only shows on the position after corresponding rotation.

Further alternative, in mobile terminal one embodiment of the present invention, under tracking-browsing pattern, figureSheet rotated control module 340 before controlling picture rotation, all users in Real-time Obtaining user listInformation, and then according to the corresponding direction of rotation of corresponding picture rotation angle initialization in user profile,And start rotation from picture normal position until rotate to corresponding maximum picture rotation angle user listDegree stops the rotation when position, wherein, and in user list in the corresponding picture rotation angle of each userStop and set duration.

Further alternative, in mobile terminal one embodiment of the present invention, under tracking-browsing pattern, instituteState picture rotation control module 340 also for: every setting-up time, successively according in described user listExcept the reversed arrangement order of the current Customs Assigned Number that newly enters other users user, control current clearThe picture rotation of looking at is to the described picture rotation angle corresponding with described other users' Customs Assigned Number.

In the present embodiment, no matter be anti-peeping browse mode or tracking-browsing pattern, as long as video camera300 monitor the user who newly adds, and picture rotation control module 340 all can be immediately to the current picture of browsingCarry out corresponding rotation and peep to prevent this user who newly adds, or make the user who newly adds just add just fashionableCan see immediately browsed picture, thereby improve the experience that this newly adds access customer browsing pictures.

Under tracking-browsing pattern, be directly picture to be rotated to from current location because new user adds fashionableThe new corresponding rotary angle position of user, therefore, may exist certain user not browse to pictureSituation, therefore, every setting-up time, picture rotation control module 340 is controlled the current picture of browsing and is revolvedForward other users corresponding picture rotation angle corresponding with other Customs Assigned Number orders to. Wherein,Setting-up time is each user's browsing time and picture rotation process time sum. For example, active userFor user 1,2,3, if added user 4, picture rotation control module 340 is controlled picture and is rotated toThe corresponding anglec of rotation of user 4, and then from the corresponding anglec of rotation of active user 4 every settingTime, control successively picture and return back to user's 3,2,1 corresponding anglec of rotation. And when browsing nextWhen pictures, every setting-up time, control picture and rotate to successively user 1,2,3 corresponding figureThe sheet anglec of rotation, and continuing to browse next pictures after all users have browsed.

In addition, under anti-peeping browse mode, generally this user who newly adds also can exit soon, thanAs this user who newly adds exits (automatically leaving primary user) automatically, or primary user shift browse angle orPerson is away from this user who newly adds, now, and also can be after setting-up time, by picture rotation control mouldPiece 340 will be controlled picture automatic rotation to the corresponding picture rotation angle of primary user, also automatically will schemeThe corresponding angle position of picture when sheet return back to this and newly adds the primary user's browsing pictures before access customer.

With reference to Fig. 9, Fig. 9 is the schematic flow sheet of picture browsing method the first embodiment of the present invention. This enforcementExample is applied to mobile terminal, and described mobile terminal comprises camera; In the present embodiment, described picture browsingMethod comprises:

Step S10, in the time that current at least one primary user carries out picture browsing, monitors current by cameraIn camera watch region, whether exist other new users' head portrait to enter, wherein, described primary user's head portrait, newUser's head portrait does not show on the screen of described mobile terminal;

In the present embodiment, primary user is mobile terminal owner or monitoring first after camera starts specificallyThe user who arrives such as owner invites multiple user's browsing pictures simultaneously, supervises first in the time that camera startsThe primary user who measures comprises owner and the user who invites thereof. In addition, camera watch region specifically refers to shooting300 regions that can photograph are concrete relevant to the hardware setting of camera 300. In the present embodimentSuppose that the angular range that camera 300 can be taken is 0～180 °, also suppose user as long as at cameraBefore 300, be all in the camera watch region of camera 300, as shown in Figure 3, user position M,P, Q, N is upper can be photographed by video camera 300.

Step S20, if so,, according to default account form, calculates described new user's direction of visual lines and instituteState the angle between the plane of screen place;

Angle α between user's direction of visual lines as shown in Figure 4 and screen place plane. In the present embodimentAngle computing module 320 specifically can calculate angle α, the tool of this account form according to default account formBody is realized and not being limit. For example, as shown in Figure 5, can calculate screen center by camera 300 and put useDistance c between account picture, and then calculate screen center by camera 300 and put user's head portrait instituteDistance a between plane, such as, the general distance from the screen of mobile terminal during due to user's browsing picturesFrom all very close to, therefore user's body can be regarded as to the plane at user's head portrait place, thus according to right angle threeAngle calculation formula in dihedral can obtain angle α=arccos (a/c). Or such as according to user's head portraitCorresponding relation between position coordinates on screen and user's head portrait physical location calculates angle α.

Step S30, according to the browse mode of described angle and the current picture of browsing of current described primary user,Determine the anglec of rotation with the corresponding current picture of browsing of described browse mode;

Step S40, controls the current picture of browsing according to rotating with the corresponding direction of rotation of described browse modeThe described anglec of rotation, jointly browses or prevents that described new user from browsing for described new user.

With reference to Figure 10, Figure 10 is the refinement schematic flow sheet of step S20 in Fig. 9. Based on above-described embodiment,In the present embodiment, above-mentioned steps S20 comprises:

Step S201, when monitor the head that has other new users in current camera watch region by described cameraPicture is while entering, the area coordinate of the head portrait that obtains described new user on described screen, described area coordinateComprise that head portrait represents coordinate;

In the present embodiment, obtain by head portrait coordinate acquiring unit 3201 head portrait that newly adds access customer and movingArea coordinate on terminal screen, the as shown in Figure 6 head portrait of user A institute on mobile terminal screenRegion, supposes the initial point that screen upper left corner O point is the corresponding XY axle of screen two-dimensional coordinate system,This region can use coordinate A (x1, y1, x2, y1) to represent, wherein, x1, x2 is the head of user AThe corresponding maximum of picture, minimum X-axis coordinate; Y1, y1 corresponds to maximum, minimum Y-axis coordinate. In addition,The central point that C point (c1, c2) is screen as shown in Figure 6, head portrait represents coordinate a point (x_a，y_a)Being preferably the central point of area coordinate A (x1, y1, x2, y1), can certainly be area coordinate AIn other coordinate points, such as any one coordinate points of X-axis coordinate figure minimum.

Step S202, represents the center point coordinate of coordinate and described screen according to described head portrait, by advanceIf angle computing formula, calculate described angle.

Angle β=90 °-k₁*(X₁/X₀) * 90 ° of formula 1;

Relative angle γ=k₂*(X₂/X₀) * 90 ° of formula 2;

Further alternative, in picture browsing method one embodiment of the present invention, based on above-described embodiment,In the present embodiment, above-mentioned steps S30 specifically comprises: if the picture that current described primary user browses is clearThe pattern of looking at is anti-peeping browse mode, determines that the anglec of rotation of the current picture of browsing equals described angle;If the browse mode of the picture that current described primary user browses is tracking-browsing pattern, determine current clearThe anglec of rotation of the picture of looking at equals the corresponding complementary angle of described angle.

In the present embodiment, if the browse mode of the picture that current described primary user browses is anti-peeping browsingPattern, determines that the anglec of rotation of the current picture of browsing equals described angle, is also that picture is from normally clear(image content is just to user and picture place plane is parallel with screen place screen or same flat to look at positionIn face) can make picture place plane and user's direction of visual lines put down after the rotation angle identical with angle βOK, or also can rotate an anglec of rotation that is greater than angle β, thereby user's sight line can only be seenThe back side of picture and prevent that other users from peeping, picture rotation angle a as shown in Figure 7.

With reference to Figure 11, Figure 11 is the schematic flow sheet of picture browsing method the second embodiment of the present invention. Based onAbove-described embodiment in the present embodiment, comprised before step S10:

Step S01, in the time starting picture browsing, opens described camera and initializes user list, described inUser list is for preserving user's relevant information;

Wherein, described user's relevant information being saved in to described user list comprises:

When monitoring by described camera while existing user's head portrait to enter in current camera watch region, to this useThe entering order at family is numbered and is corresponding during by this user's Customs Assigned Number and this user's browsing picturesPicture rotation angle is saved in described user list; When monitoring current camera watch region by described cameraWhile inside existing user's head portrait to exit, from described user list, delete this user's Customs Assigned Number and this useThe corresponding described picture rotation angle in family, and upgrade in described user list this user's entering order itAfter other users' Customs Assigned Number.

Further alternative, in picture browsing method one embodiment of the present invention, under tracking-browsing pattern,Before controlling picture rotation, all user profile in Real-time Obtaining user list, and then according to useFamily numbering, shows corresponding postrotational picture successively, and wherein, picture rotation process does not show, pictureOn position after corresponding rotation, show.

Further alternative, in picture browsing method one embodiment of the present invention, under tracking-browsing pattern,Before controlling picture rotation, all user profile in Real-time Obtaining user list, and then according to useThe corresponding direction of rotation of corresponding picture rotation angle initialization in the information of family, and open from picture normal positionBegin rotation until stop the rotation while rotating in user list corresponding maximum picture rotation angle position,Wherein, in user list, in the corresponding picture rotation angle of each user, stop and set duration.

With reference to Figure 12, Figure 12 is the schematic flow sheet of picture browsing method of the present invention the 3rd embodiment. Based onAbove-described embodiment, in the present embodiment, under tracking-browsing pattern, comprises after above-mentioned steps S40:

Step S50, every setting-up time, successively according in described user list except current newly enter user withThe reversed arrangement order of other outer users Customs Assigned Number, controls the current picture rotation of browsing and arrives and instituteState other users' the corresponding described picture rotation angle of Customs Assigned Number.

Through the above description of the embodiments, those skilled in the art can be well understood to above-mentionedThe mode that embodiment method can add essential general hardware platform by software realizes, and can certainly lead toCross hardware, but in a lot of situation, the former is better embodiment. Based on such understanding, of the present inventionThe part that technical scheme contributes to prior art in essence in other words can be with the form body of software productReveal to come, this computer software product is stored in a storage medium (as ROM/RAM, magnetic disc, lightDish) in, (can be mobile phone, computer, serves in order to make a station terminal equipment to comprise some instructionsDevice, air-conditioner, or the network equipment etc.) carry out the method described in each embodiment of the present invention.

These are only the preferred embodiments of the present invention, not thereby limit the scope of the claims of the present invention, everyUtilize equivalent structure or the conversion of equivalent flow process that description of the present invention and accompanying drawing content do, or directly orConnect and be used in other relevant technical fields, be all in like manner included in scope of patent protection of the present invention.

Claims

1. a mobile terminal, described mobile terminal comprises camera, it is characterized in that, described eventually mobileEnd also comprises:

2. mobile terminal as claimed in claim 1, is characterized in that, described angle computing module comprises:

3. mobile terminal as claimed in claim 1 or 2, is characterized in that, described browse mode comprisesAnti-peeping browse mode, tracking-browsing pattern;

Described anglec of rotation determination module specifically for: if the picture that current described primary user browses is clearThe pattern of looking at is anti-peeping browse mode, determines that the anglec of rotation of the current picture of browsing equals described angle;And if the browse mode of the picture browsed of current described primary user is tracking-browsing pattern, determines and work asBefore the anglec of rotation of the picture browsed equal the corresponding complementary angle of described angle.

4. mobile terminal as claimed in claim 3, is characterized in that, described mobile terminal also comprises:

5. mobile terminal as claimed in claim 4, is characterized in that, under tracking-browsing pattern, and instituteState picture rotation control module also for:

6. a picture browsing method, is applied to mobile terminal, and described mobile terminal comprises camera, itsBe characterised in that, described picture browsing method comprises:

7. picture browsing method as claimed in claim 6, is characterized in that, described when passing through cameraMonitor while existing in current camera watch region other new users' head portrait to enter, according to default account form, countThe angle of calculating between described new user's direction of visual lines and described screen place plane comprises:

8. the picture browsing method as described in claim 6 or 7, is characterized in that, described browse modeComprise anti-peeping browse mode, tracking-browsing pattern; Described according to described angle and current described primary userThe browse mode of the current picture of browsing, definite and the corresponding current picture of browsing of described browse modeThe anglec of rotation comprises:

9. picture browsing method as claimed in claim 8, is characterized in that, described current at least oneWhen individual primary user starts to carry out picture browsing, monitor in current camera watch region whether have it by cameraBefore entering, he new user's head portrait comprises: in the time starting picture browsing, open described camera initialChange user list, described user list is for preserving user's relevant information;

10. picture browsing method as claimed in claim 9, is characterized in that, in tracking-browsing patternUnder, the current picture of browsing of described control is according to described in the rotation of the corresponding direction of rotation of described browse modeAfter the anglec of rotation, comprise: