CN104463781A - Method for controlling POV display device to display images and animation - Google Patents

Method for controlling POV display device to display images and animation Download PDF

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Publication number
CN104463781A
CN104463781A CN201410820266.0A CN201410820266A CN104463781A CN 104463781 A CN104463781 A CN 104463781A CN 201410820266 A CN201410820266 A CN 201410820266A CN 104463781 A CN104463781 A CN 104463781A
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Prior art keywords
image
display
display device
pov
animation
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CN201410820266.0A
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Inventor
施友岚
钱超
杨向兴
周龙鹏
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CHENGDU CHENDIAN INTELLIGENT TECHNOLOGY Co Ltd
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CHENGDU CHENDIAN INTELLIGENT TECHNOLOGY Co Ltd
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Priority to CN201410820266.0A priority Critical patent/CN104463781A/en
Publication of CN104463781A publication Critical patent/CN104463781A/en
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    • G06T3/04
    • GPHYSICS
    • G06COMPUTING; CALCULATING OR COUNTING
    • G06TIMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T13/00Animation
    • G06T13/802D [Two Dimensional] animation, e.g. using sprites
    • GPHYSICS
    • G06COMPUTING; CALCULATING OR COUNTING
    • G06TIMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T3/00Geometric image transformation in the plane of the image
    • G06T3/60Rotation of a whole image or part thereof
    • G06T3/604Rotation of a whole image or part thereof using a CORDIC [COordinate Rotation Digital Compute] device
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/22Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
    • G09G3/30Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
    • G09G3/32Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]

Abstract

The invention provides a method for controlling a POV display device to display images and animation. The method for displaying color images comprises the following steps that firstly, a round interesting area obtained from an image represented by an RGB color model serves as an image to be displayed; secondly, the image to be displayed is modularized in the radial direction and converted into a set of data which can operate on the display device and control light-emitting intensity of LED lamps; thirdly, the data are sent to the display device in a wireless mode, the display device extracts the data, and the LED lamps are controlled to display the image to be displayed in the rotating process. By means of the method for controlling the POV display device to display the images and the animation, free wireless switching between the images and the animation can be achieved for the display device, a user can zoom the images or the animation displayed by the display device, change the display angle, the content, the hue and the like of the images or the animation, and user experience is greatly improved.

Description

The method of control POV display device display image and the method for display animation
Technical field
The present invention relates to technical field of information display, especially relate to the method for a kind of control POV display device display image and the method for display animation.
Background technology
POV rotating LED display technique utilizes the eye storage characteristic of human eye, when certain physical construction (as motor, wheel etc.) drives LED array to rotate, when running to a certain position, LED array just shows the state of this position, the state of the next position is shown again after the next position, when LED array velocity of rotation is enough fast, a row display device just can complete the display of all images.Scanning process is rotated by physical construction the position changing LED array and is realized.
Existing POV rotating LED display device, need first with computer software, the picture for display to be processed, generating pictures data, and be stored in Flash memory storage, when center axis of rotation, central controller reads the image data stored, and it is bright or go out to control corresponding LED, due to persistence of vision principle, people just can see splendid colorful pattern, word.But, because the single-chip microcomputer internal memory of this POV rotating LED display device is very little, 1,2 pictures data can only be stored, user is only to select limited picture to switch, and the replacing of picture inconvenience very, need again to write code according to the actual conditions of picture, and again carry out wired connection with computer, then programming is in single-chip microcomputer; Although some POV rotating LED display device is improved for this, image data leaves in inside the memory devices such as tf card, Flash memory chip by it, then using the outer extension memory of these memory devices as single-chip microcomputer, but still the needs that user arbitrarily changes picture can not be met.
Summary of the invention
The object of the invention is to: for prior art Problems existing, the method of a kind of method providing control POV display device to show image and display animation, solve the problem that existing display device limited memory, storage figure picture or animation number are few, change display image or animation inconvenience, solve the problem that existing display device can not change arbitrarily display start angle.
Goal of the invention of the present invention is achieved through the following technical solutions:
A method for control POV display device display image, for POV rotating LED display device, it is characterized in that, the method comprises the following steps:
(1) image represented at RGB color model obtains a rounded interested area as the image for display;
(2) radial delivery is carried out to the image for display, be converted into one group and run in display device, the data of LED luminous intensity can be controlled;
(3) these data are wirelessly sent to display device, display device extracts data, and controls the image that LED demonstrates wish display when rotating.
Preferably, the method, before carrying out step (1), also comprises image reading step: according to user instruction reading images, if the image read does not belong to RGB color model, is then converted to RGB color model.
Preferably, the image obtained in step (1) for display is carried out choosing by user as required or system is chosen according to unique point automatically.
Preferably, the method also comprises adjustment picture tone step: before obtaining the image for display, automatically adjust the adjustment instruction of R, G, B tri-color parameters of whole image according to user instruction or system.
Preferably, the method also comprises adjustment picture tone step: after obtaining the image for display, automatically adjusts the adjustment instruction of R, G, B tri-color parameters of the image for display according to user instruction or system.
Preferably, the method step that the image shown wish in step (2) carries out radial delivery is:
(21) the delivery start angle using the position angle θ 0 residing for the position transducer of display device as the image for display, the delivery angle using the angle △ θ of display device switching display content as the image for display;
(22) central point of image wish shown, as limit, draw a ray as pole axis, and the positive dirction of predetermined angular is identical with the rotation direction of display device toward θ 0 direction;
(23) according to the LED number N on the single arm of display device, the radius r of the image for display is divided into N part, altogether N number of branch;
(24) radius r is rotated along positive dirction from pole axis, often rotate R, G, B color value that △ θ then obtains each branch position, until rotate a circle, obtain (360 °/△ θ) * N*3 data altogether;
(25) obtained data are stored in order respectively in R, G, B tri-color arrays, complete radial delivery.
Preferably, when display device extraction data demonstrate the image for display, start angle is shown using the delivery start angle of the image for display as image.
Preferably, display device can according to the instruction change image display start angle of user.
A kind of method of control POV display device display animation, for POV rotating LED display device, it is characterized in that, the method for: each two field picture of animation is completed delivery according to the method showing coloured picture described in claim 1 all respectively and is wirelessly transmitted in display device, constantly switch on the display apparatus by certain frame per second between picture frame and frame simultaneously and show, can animation effect be demonstrated.
Compared with prior art, the present invention has the following advantages:
1, after using this method, the data processings such as delivery can be carried out to colour picture or color animation on mobile phone, computer or other mobile terminals, then bag is encapsulated data into, be sent on the wireless data transmission device of display device by wireless data transmission protocols, and then realize any wireless switching of picture and animation, expand the storage space of the displaying contents such as picture, animation this schemes tend, save the cost expanding the memory span of display system own simultaneously;
2, the tone etc. that image that user shows display device or animation carry out the content of the angles of display of convergent-divergent, change image or animation, change image or animation, change image or animation can be realized, significantly enhance Consumer's Experience.
Accompanying drawing explanation
Fig. 1 is the principle of operation figure of the inventive method;
Fig. 2 is the original image read in;
Fig. 3 is for getting rounded interested area;
Fig. 4 is set and display start angle;
Fig. 5 is radial delivery schematic diagram.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in detail.
Embodiment
The invention provides the method for a kind of control POV display device display image, be mainly used in control POV rotating LED display device color display, its principle of operation figure as shown in Figure 1, it is based on the radial color impression-taking technique of coloured image, random color is read in by the program on mobile terminal, after the image of arbitrary content, image modulo operation can be carried out fast, can realize in operating process adjusting picture tone, the functions such as image angles of display are set, finally be converted into one group can run on single-chip microcomputer, control RGB LED is red, green, the data of blue three kinds of tone luminous intensities, and by wireless data transfer module these data are transferred in POV rotating LED display device and show.The present invention also provides a kind of method showing animation, be mainly used in control POV rotating LED display device display color animation, each two field picture of animation is completed delivery according to the method for described color display and is wirelessly transmitted in display device by all respectively, constantly switch on the display apparatus by certain frame per second between picture frame and frame simultaneously and show, can animation effect be demonstrated.
The step that coloured image delivery and delivery the data obtained carry out showing in POV rotating LED display device is as follows:
1, selected image step to be operated.Mobile terminal receives user to the selection instruction of application drawing picture, then reads this application drawing picture, exemplarily, reads in original image as shown in Figure 2.Image can be random color and content, but RGB color model must be used to represent, if other color model, as hsv color model, CMY color model etc., existing any conversion method can be adopted to be converted to RGB color space, and namely the color value at each pixel place is by (R, G, B) three Parametric Representations, the colour gamut of each color needs the prior imformations such as the color figure place that adopts according to display system and display requirement to determine.One skilled in the art will appreciate that display system generally has the color figure places such as 1,8,12,16, for convenience of description, follow-uply all suppose that display system adopts 8 256 rank RGB color spaces, no longer repeat specification.
For this image, first pixel arranging the upper left corner is coordinate origin, and namely this point coordinate is (0,0); From this point, level is to the right coordinate system X-axis positive dirction; Be coordinate system Y-axis positive dirction vertically downward.
2, selected rounded interested area step.According to the needs of embody rule, after being observed by people or adopting image recognition technology, the area-of-interest of selected a certain circle in the picture, as shown in Figure 3.If the process of selected rounded interested area is manipulated by people, then need to receive the center of circle of user to rounded interested area, the selection instruction of radius two parameters, finally determine the range and position of rounded interested area; If the process of selected rounded interested area is realized by image recognition technology, then need first to carry out certain preprocessing process to image, and calculate suitable central coordinate of circle and radius size according to pre-processed results, described preprocessing process such as, but be not limited to, feature point detection and extraction.Arrange the central coordinate of circle of rounded interested area herein for (m, n), radius is r.
The picture material that this rounded interested area is selected, after change picture tone, radial image delivery etc. further image procossing, can export as the view data being adapted at POV rotating LED display device being carried out show, therefore this rounded interested area corresponds to the circular display area of POV rotating LED display device.
When the radius r of this rounded interested area is constant, change its centre coordinate (m, n) position of rounded interested area relative to original image is then changed, namely changing the picture material that rounded interested area comprises, is also the picture material in POV rotating LED display device shown by circular display area.Because radius r is constant, the area of rounded interested area is constant, and the quantity of the pixel of its original image comprised is constant.
At the centre coordinate (m of this rounded interested area, n) when constant, increasing the area that its radius r then adds rounded interested area, namely add the picture material that it comprises, is also the picture material in POV rotating LED display device shown by circular display area; Reducing the area that its radius r then decreases rounded interested area, namely decrease the picture material that it comprises, is also the picture material in POV rotating LED display device shown by circular display area.So the radius r size of change rounded interested area, is equivalent to and has carried out zoom operations to display image.
3, optional, adjustment picture tone step.According to the needs of embody rule, some image needs to carry out suitable adjustment to R, G, B tri-kinds of tones.Mobile terminal receives user to the adjustment instruction of R, G, B tri-color parameters, or decide the Adjusted Option to three kinds of tones in its sole discretion by image processing algorithm, obtain R hue shift value, G hue shift value and B hue shift value, this hue shift value span is between-255 ~ 255.R hue shift value, G hue shift value, B hue shift value are added with the actual R tone value of each pixel in original image rounded interested area, actual G tone value, actual B tone value, each pixel obtains new R tone value, new G tone value, new B tone value, if new tone value is greater than 255, then be taken as 255, if new tone value is less than 0, be then taken as 0.
Especially, the execution sequence of adjustment picture tone step and selected rounded interested area step can be exchanged mutually, if selected rounded interested area step first performs, then adjusting picture tone only needs to perform pixel in rounded interested area, can save the expense of this treatment step; If adjustment picture tone first performs, then need to calculate R, G, B tri-new tone value of look to all pixels of original image, according to the new image obtained, then observed by people or adopt image recognition technology, in the picture the area-of-interest of selected a certain circle.
4, set and display start angle step.The prior imformations such as the position residing for POV rotating LED display device position transducer and display requirement, for the image setting in rounded interested area one carries out the start angle that shows, when then display device receives pulse signal from position transducer at every turn, from this start angle in rounded interested area, the pixel in image radius can be shown.Exemplarily, as shown in Figure 4, be set to θ 0, then the image angle shown does not deflect display start angle, and image angle namely as shown in the figure.
In general, the position that POV rotating LED display device position transducer receives pulse signal can not change, and thus by changing the setting of described display start angle, freely can change the angles of display of image.Exemplarily, under the prerequisite that the position that display device position transducer receives pulse signal is fixed, if display start angle is rotated counterclockwise 90 ° from illustrated θ 0, change to new angle θ 1, when then display system receives pulse signal from position transducer at every turn, from θ in rounded interested area 1 place, the pixel in image radius can be shown, is namely equivalent to shown image clockwise half-twist.
5, coordinate system transformation step.For convenience of radial image delivery, need first image in rounded interested area to be transformed to polar coordinate system by rectangular coordinate system, detailed process is: by the picture centre coordinate (m in rounded interested area, n) as limit, draw a ray Ox as pole axis toward θ 0 direction, and the positive dirction of predetermined angular is identical with the rotation direction of POV rotating LED display device.
6, radial image removing step.As shown in Figure 5, exemplarily, suppose that the often row LED on the single arm of POV rotating LED display device has N number of lamp, the radius r of image in rounded interested area is divided into N part according to lamp number, by r positive dirction along angle in described coordinate system transformation step from pole axis, namely image display direction rotates, each rotation △ θ, rotate after 360/ △ θ time until get back to pole axis, interpolation or the direct R obtaining target pixel points place is got by algorithm in each angular position, G, B color value, (360/ △ θ) * lamp number (N) * three primary colours (3) individual data will be taken out after then rotating a circle, each data 8 (255 color ranges of tone can be represented).Data data processing obtained are stored in R, G, B tri-color arrays in order respectively, namely complete the radial modulo operation of image.
7, Wireless Data Transmission step.R, G, B tri-the color arrays obtained by described image removing step are packaged into packet, according to the wireless data transmission protocols run in mobile terminal and POV rotating LED display device, be wirelessly transmitted on the wireless data transfer module of POV rotating LED display device.
8, image display step.After the wireless data transfer module of POV rotating LED display device receives the packet that Wireless Data Transmission step imports into, therefrom can extract the data of R, G, B tri-color arrays, and then view data delivered in data memory module store, and from the first address of this view data in Flash memory storage, control LED display circuit and show the picture material made new advances.Such as: if be divided into three arrays to store RGB tri-kinds of tones, each color array has a first address; Suppose that display system adopts M position look, each array element can be M position; To have the wall scroll arm of one side led, suppose arm to employ N=24 led, angle △ θ=1 ° of switching display content, and the angle receiving pulse signal place arm using position transducer is as display start angle θ 0, then data read module can when θ 0, from Flash memory storage, from the first address of three color arrays, read front 24 array elements respectively, send into the modulation carrying out control signal in LED driver module; Control signal will maintain output always, until when turning over 1 °, then reads N+1 ~ N+N array element respectively from three color arrays, modulates the control signal made new advances and carry out driving LED display circuit in feeding LED driver module; Repeat above-mentioned data read process.Use has the arm of two-sided led or uses many arms to strengthen display effect, but consistent with the displaying principle of the mono-arm of one side led; Display dynamic picture can strengthen display effect, but displaying principle when showing every frame picture is consistent with above-mentioned data read process.
In addition, after view data is successfully transmitted on POV rotational display system, angle to image shown by it adjusts, 1. ~ image delivery 8. and image display operations described in can re-starting, only need change LED driver module reads image data from which address of view data, such as, if setup control display system shows image from the place of 0 ° of angle, then reads image data from the first address of each color array of view data, if setup control display system shows image from the place of 90 ° of angles, then reads image data from 90* lamp number (24) * three primary colours (3) the individual address of each color array of view data, this angles of display can be set arbitrarily by user,
After view data is successfully transmitted on POV rotational display system, the operation of change picture tone is carried out to image shown by it, 1. ~ image delivery 8. and image display operations can be selected described in re-starting, also can select that R hue shift value, G hue shift value and B hue shift value are sent to POV rotating LED display system place by wireless data transmission protocols and change the view data stored in flash storage again.
After view data is successfully transmitted on POV rotational display system, carry out zoomed image operation to image shown by it, 1. ~ image delivery 8. and image display operations described in must re-starting.
The step that animated image delivery and delivery the data obtained carry out showing in POV rotating LED display device is as follows: first each two field picture of animation completed delivery according to the method for described color display all respectively and be wirelessly transmitted in display device, constantly switch on the display apparatus by certain frame per second between picture frame and frame simultaneously and show, can animation effect be demonstrated.Frame per second during display animation determines the smooth degree that animation is play, the higher then animation of frame per second is play more smooth coherent, it is stronger that the lower then animation of frame per second plays the sense that pauses, frame per second size can be set by the user, and also can be specified according to prior imformations such as practical application request, POV rotating LED display device rotating speeds by system.
Further, other several operation that can strengthen the control of POV rotating LED display system is provided: the display of change brightness of image, picture/animation switches.
Change brightness of image is used for the display brightness of set and display system led, the original display brightness of LED is certain default value, a new brightness value can be set arbitrarily by user, if new brightness value is larger than default value, then energy supply control module increases the voltage being supplied to LED, increase degree is determined according to the difference of new brightness value and default value, if new brightness value is less than default value, in like manner then energy supply control module reduces the voltage being supplied to LED;
The display of picture/animation switches for sending controling instruction to display system, and display system is determined to Show Picture or animation according to control word.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, it should be pointed out that all any amendments done within the spirit and principles in the present invention, equivalent replacement and improvement etc., all should be included within protection scope of the present invention.

Claims (9)

1. a method for control POV display device display image, for POV rotating LED display device, it is characterized in that, the method comprises the following steps:
(1) image represented at RGB color model obtains a rounded interested area as the image for display;
(2) radial delivery is carried out to the image for display, be converted into one group and run in display device, the data of LED luminous intensity can be controlled;
(3) these data are wirelessly sent to display device, display device extracts data, and controls the image that LED demonstrates wish display when rotating.
2. the method for a kind of control POV display device display image according to claim 1, it is characterized in that, the method is before carrying out step (1), also comprise image reading step: according to user instruction reading images, if the image read does not belong to RGB color model, be then converted to RGB color model.
3. the method for a kind of control POV display device display image according to claim 1, is characterized in that, the image obtained in step (1) for display is carried out choosing by user as required or system is chosen according to unique point automatically.
4. the method for a kind of control POV display device display image according to claim 1, it is characterized in that, the method also comprises adjustment picture tone step: before obtaining the image for display, automatically adjust the adjustment instruction of R, G, B tri-color parameters of whole image according to user instruction or system.
5. the method for a kind of control POV display device display image according to claim 1, it is characterized in that, the method also comprises adjustment picture tone step: after obtaining the image for display, automatically adjusts the adjustment instruction of R, G, B tri-color parameters of the image for display according to user instruction or system.
6. the method for a kind of control POV display device display image according to claim 1, it is characterized in that, the method step that the image shown wish in step (2) carries out radial delivery is:
(21) the delivery start angle using the position angle θ 0 residing for the position transducer of display device as the image for display, the delivery angle using the angle △ θ of display device switching display content as the image for display;
(22) central point of image wish shown, as limit, draw a ray as pole axis, and the positive dirction of predetermined angular is identical with the rotation direction of display device toward θ 0 direction;
(23) according to the LED number N on the single arm of display device, the radius r of the image for display is divided into N part, altogether N number of branch;
(24) radius r is rotated along positive dirction from pole axis, often rotate R, G, B color value that △ θ then obtains each branch position, until rotate a circle, obtain (360 °/△ θ) * N*3 data altogether;
(25) obtained data are stored in order respectively in R, G, B tri-color arrays, complete radial delivery.
7. the method for a kind of control POV display device display image according to claim 6, is characterized in that, when display device extraction data demonstrate the image for display, show start angle using the delivery start angle of the image for display as image.
8. the method for a kind of control POV display device display image according to claim 6, is characterized in that, display device can according to the instruction change image display start angle of user.
9. the method for a control POV display device display animation, for POV rotating LED display device, it is characterized in that, the method for: each two field picture of animation is completed delivery according to the method showing coloured picture described in claim 1 all respectively and is wirelessly transmitted in display device, constantly switch on the display apparatus by certain frame per second between picture frame and frame simultaneously and show, can animation effect be demonstrated.
CN201410820266.0A 2014-12-25 2014-12-25 Method for controlling POV display device to display images and animation Pending CN104463781A (en)

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