CN103268194B - A kind of method of testing and testing tool time delay of interactive intelligent tablet computer - Google Patents
A kind of method of testing and testing tool time delay of interactive intelligent tablet computer Download PDFInfo
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- CN103268194B CN103268194B CN201310136567.7A CN201310136567A CN103268194B CN 103268194 B CN103268194 B CN 103268194B CN 201310136567 A CN201310136567 A CN 201310136567A CN 103268194 B CN103268194 B CN 103268194B
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Abstract
The present invention proposes a kind of method of testing time delay of interactive intelligent tablet computer, comprises step: at the uniform velocity moved on tested interactive intelligent tablet computer curtain by paintbrush; Catch interactive intelligent tablet computer to respond described paintbrush and move the line vestige of formation, pen position and carry out the picture of the measuring instrument arranged in advance according to the movement of described paintbrush; Wherein, described measuring instrument is for the length of the displacement and described line vestige that obtain described paintbrush; The length of described line vestige in acquisition picture and the distance difference of the displacement of described paintbrush; Obtain the ratio of described distance difference and described paintbrush translational speed, obtain touching time delay.The present invention also proposes a kind of testing tool time delay of interactive intelligent tablet computer, can improve the accuracy of detection of interactive intelligent tablet computer time delay.
Description
Technical field
The present invention relates to interactive intelligent tablet computer performance test field, particularly relate to a kind of method of testing and testing tool time delay of interactive intelligent tablet computer.
Background technology
Current whole industry is substantially all be defined in touch on the frame response time for the definition touching time delay, when we write on all-in-one, first by the trajectory coordinates touching frame seizure writing position, USB data transmission is modeled to computer module by usb protocol, computer module is by the computing of each coordinate, view data is become to deliver to corresponding display module by corresponding software simulation, export Video Decoder to by HDMI and carry out image decoding, connect display screen by LVDS after video decode and be only the final display frame that we see.And can according to the difference of screen refresh rate at video decoding part, decoding process also can change thereupon.Use in the industry screen substantially can be divided into 60HZ/120HZ two kinds of patterns at present.It is 60HZ that demoder exports default refresh rate, but when we adopt 120HZ to shield time, just needs to increase frequency multiplication plate between the two, i.e. MEMC technology.
Its principle adopts dynamic mapping system exactly, inserts a frame movement compensating frame between two traditional two field pictures, and the 60Hz refresh rate of ordinary flat TV is promoted to 120Hz.Such as: the frame sequential of a secondary flow picture is originally: 123456
MEMC technology is by blockette, and between original various frame, insert an intermediate frame after being analyzed the movement tendency of image in both the horizontal and vertical directions, the frame sequence after interleave becomes: 1C22C33C44C55C6
Field frequency original so is just not enough to manifest now all frames, so just can present field frequency to double effect, and is increased to 120Hz from 60Hz.This technology can meet the effect of frequency multiplication, but also brings corresponding late effect.While interleave, DDR needs to preserve two frames transmitted or multiple image, by calculating the midway film between frame and frame, and then inserts this midway film between two frames.For writing, the action of this preservation frame number, calculating midway film, insertion picture to bringing larger late effect in writing process, according to the difference of processing mode, will can reach tens milliseconds time delay undoubtedly.
In current industry, delay algorithm is all that to touch the frame theoretical response time be final decision content time delay, and there is larger difference with the actual delay time, is more unilateral decision procedure.Touching the frame response time is between several millisecond, and computer buffer memory and calculating are also between several millisecond, but frequency multiplication cache-time is because of the delay being a few frame form, and according to the difference of processing scheme mode, the time can reach at most tens milliseconds; This respect all specification targets cannot to quantize to embody time delay in current industry, and current measuring technique obtains interactive intelligent tablet computer to be difficult to the touch time delay of truly reflecting that interactive intelligent tablet computer is real time delay.
Summary of the invention
The object of the invention is to propose a kind of method of testing and testing tool time delay of interactive intelligent tablet computer, the accuracy of detection of interactive intelligent tablet computer time delay can be improved.
The scheme adopted:
Method of testing time delay for interactive intelligent tablet computer, comprises step:
Paintbrush is at the uniform velocity moved on tested interactive intelligent tablet computer curtain;
Catch interactive intelligent tablet computer to respond described paintbrush and move the line vestige of formation, pen position and carry out the picture of the measuring instrument arranged in advance according to the movement of described paintbrush; Wherein, described measuring instrument is for the length of the displacement and described line vestige that obtain described paintbrush;
The length of described line vestige in acquisition picture and the distance difference of the displacement of described paintbrush;
Obtain the ratio of described distance difference and described paintbrush translational speed, obtain the time delay of interactive intelligent tablet computer.
And a kind of testing tool time delay of interactive intelligent tablet computer, comprising: image capture device, at the uniform velocity lining instrument, measuring instrument; Wherein, described at the uniform velocity lining instrument comprises paintbrush, at the uniform velocity ruling on tested interactive intelligent tablet computer curtain;
Described measuring instrument is arranged according to the motion track of described paintbrush, and displacement and interactive intelligent tablet computer curtain for obtaining described paintbrush respond the length that described paintbrush moves the line vestige of formation;
Described image capture device is every the picture catching described line vestige, pen position and described measuring instrument;
Described time delay, testing tool also comprised processor;
Wherein, described image capture device catches described line vestige with the first predetermined time interval, and wherein, described first predetermined time interval is the time interval obtaining 2 described pictures continuously; Described processor is for obtaining the distance difference of the length of described line vestige in every width picture and the displacement of described paintbrush, and the ratio of the translational speed of the described distance difference obtained in each width picture and described paintbrush, when the difference of the maximal value of described ratio and the minimum value of described ratio is less than or equal to the refresh time of described interactive intelligent tablet computer curtain, obtain the time delay of minimum value as interactive intelligent tablet computer of described ratio.
In the present invention, when interactive intelligent tablet computer is rule, by getting the delay distance of line vestige relative to the paintbrush of at the uniform velocity movement in interactive intelligent tablet computer of interactive intelligent tablet computer response formation, then obtain the ratio of this delay distance relative to the translational speed of paintbrush, obtain comparatively real interactive intelligent tablet computer time delay; The present invention touches the frame response time except considering, also fully take into account frequency multiplication cache-time, more objectively consider all factors affecting touch product and postpone, experience value the most really is effectively presented, improves the measuring accuracy of interactive intelligent tablet computer time delay.
Accompanying drawing explanation
Fig. 1 is an embodiment process flow diagram of the inventive method;
Fig. 2 is an instrumentation plan in the inventive method;
Fig. 3 is an instrumentation plan in the inventive method;
Fig. 4 is an instrumentation plan in the inventive method;
Fig. 5 is a schematic diagram of the survey instrument that the present invention proposes;
Fig. 6 is another schematic diagram of the survey instrument that the present invention proposes;
Fig. 7 is another schematic diagram of the survey instrument that the present invention proposes;
Fig. 8 is another schematic diagram of the survey instrument that the present invention proposes;
Fig. 9 is another schematic diagram of the survey instrument that the present invention proposes.
Embodiment
The present invention proposes a kind of method of testing time delay of interactive intelligent tablet computer, and its implementing procedure with reference to figure 1, can comprise step:
S1, paintbrush at the uniform velocity to be moved on tested interactive intelligent tablet computer curtain;
Concrete, during test, in interactive intelligent tablet computer, open drawing tools, written handwriting can be allowed to be retained; In view of interactive intelligent tablet computer technology general at present, can using the pointer of interactive intelligent tablet computer as the paintbrush in the present invention.
S2, catch interactive intelligent tablet computer response paintbrush and move the line vestige of formation, pen position and carry out the picture of the measuring instrument arranged in advance according to the movement of paintbrush;
Catch interactive intelligent tablet computer response paintbrush to move the line vestige of formation, pen position and carry out the picture of the measuring instrument arranged in advance according to the movement of paintbrush; Wherein, measuring instrument for obtain paintbrush displacement and line vestige length.
When obtaining picture, the image-capturing apparatus automatically controlled can be adopted, also can adopt manual image-capturing apparatus; As: camera can be adopted as image-capturing apparatus;
The length of line vestige in S3, acquisition picture and the distance difference of the displacement of paintbrush;
Because there is time delay, can there is a delay distance difference in detail pen and person's handwriting, catches setting-out vestige device and flutter and catch picture, measuring instrument can directly read this segment distance by flutterring.
Distance difference in S4, acquisition picture and the ratio of paintbrush translational speed, obtain the time delay of interactive intelligent tablet computer.
In the present invention, when interactive intelligent tablet computer is rule, by getting the delay distance of line vestige relative to the paintbrush of at the uniform velocity movement in interactive intelligent tablet computer of interactive intelligent tablet computer response formation, then obtain the ratio of this delay distance relative to the translational speed of paintbrush, obtain comparatively real interactive intelligent tablet computer time delay; The present invention touches the frame response time except considering, also fully take into account frequency multiplication cache-time, more objectively consider all factors affecting interactive intelligent tablet computer and postpone, experience value the most really is effectively presented, improves the measuring accuracy of the time delay of interactive intelligent tablet computer.
Interactive intelligent tablet computer is that a kind of warm TV tech, computer technology, touching technique, sound technique are in one, realize the integration apparatus of man-machine interaction, it not only has the function of traditional liquid crystal TV high definition display, also it is made also to have computing power by configuring built-in computer module, and can be manipulated computer by touch technology, obtain man-machine interactive easily and experience.
As one of them specific embodiment, can see Fig. 2, setting paintbrush carries out uniform rectilinear and moves from the high order end of interactive intelligent tablet computer, and the translational speed of paintbrush can be passed through at the uniform velocity lining instrument and directly read, and is V; The picture obtained is as Fig. 2, and from this picture, the displacement that can obtain paintbrush is L1, and interactive intelligent tablet computer responds this paintbrush, and to move the line mark lengths obtained be L2; Then this line vestige is L1-L2=S relative to the delay distance of paintbrush current location; Then the time delay of interactive intelligent tablet computer is T=S/V.
Due to interactive intelligent tablet computer refresh with the response time minimum also can more than tens milliseconds.If in Fig. 1 embodiment, when obtaining picture, interactive intelligent tablet computer curtain just refreshes, and now can produce considerable influence to test result; Therefore need the impact eliminating interactive intelligent tablet computer refresh time, further, the present invention has done following improvement:
In above-mentioned steps S2, catch picture with the first predetermined time interval; Wherein, the first predetermined time interval was the time interval obtaining 2 pictures continuously;
In above-mentioned steps S3, obtain the distance difference in every width picture;
In above-mentioned steps S4, obtain the ratio of distance difference in each width picture and paintbrush translational speed, when the very first time was less than or equal to for the second time, the minimum value of ratio is and touches time delay; Wherein, the very first time is the difference of the maximal value of ratio and the minimum value of ratio; Second time was the refresh time of interactive intelligent tablet computer curtain.
By repeatedly acquiring ratio not of uniform size, when the difference of the maximal value of this ratio and the minimum value of this ratio is less than or equal to the refresh time of interactive intelligent tablet computer, the minimum value of this ratio is more real interactive intelligent tablet computer time delay.
On the other hand, due to the limitation of current image capture device, there is aperture time in picture catching device, when obtaining each picture, can produce certain impact to the time delay of interactive intelligent tablet computer; For camera, be camera shutter time.At the aperture time that this is camera with the second predetermined time interval; Due to the impact of the second predetermined time interval, also can cause certain error time delay to interactive intelligent tablet computer, the present invention has done further improvement for this reason:
Picture is caught with the first predetermined time interval; Wherein, the first predetermined time interval was the time interval obtaining 2 pictures continuously;
Obtain the distance difference in every width picture;
Obtain the ratio of distance difference in each width picture and paintbrush translational speed,
When the difference of the maximal value of ratio and the minimum value of ratio is less than or equal to refresh time and the difference of the second predetermined time interval of interactive intelligent tablet computer curtain, then obtain the time delay of minimum value as interactive intelligent tablet computer of ratio; Wherein, the second predetermined time interval was camera shutter time.
Concrete, when utilizing camera to carry out picture capture, guaranteeing not need aperture time toward lowering in smear situation, lower limit is for being decided to be the upper limit close to shielding backlight refresh time.For avoiding backlight disturbed test result, and evade conditions of streaking, camera shutter time value is decided to be 4ms/ and opens.
When interactive intelligent tablet computer is rule, can according to physical condition, carry out the line of straight line line, circular line or other shapes, in general, carrying out straight line line than being easier to operates.
Because the present invention need use the at the uniform velocity translational speed of paintbrush, for the at the uniform velocity lining instrument that directly can obtain paintbrush translational speed, can directly obtain from the uniform velocity lining instrument; But directly can not obtain the scoring equipment of paintbrush at the uniform velocity translational speed for some, can adopt and obtain with the following method:
The distance difference of the displacement of the paintbrush in adjacent 2 width pictures is obtained the translational speed of paintbrush divided by the first predetermined time interval; First predetermined time interval was the time interval obtaining 2 pictures continuously.For camera, the first predetermined time interval is the continuous shooting time.
As another embodiment, setting paintbrush carries out uniform rectilinear and moves from the high order end of interactive intelligent tablet computer, when obtaining the at the uniform velocity translational speed of paintbrush, continuous 2 pictures obtained, as shown in Figure 3 and Figure 4, as can be seen from Figure 3, the displacement of paintbrush is L3, and the displacement of paintbrush is L4 as can be seen from Figure 4; The distance that the range difference of L4 and L3 is the time movement of paintbrush between 2 pictures of image capture device continuous capturing; Namely it is above-mentioned first predetermined time interval; Then, movement speed v=(L4-L3)/first predetermined time interval of paintbrush.
In the above-described embodiments, according to camera as the equipment catching picture, then the first predetermined time interval was the camera continuous shooting time.
The present invention also proposes a kind of testing tool time delay of interactive intelligent tablet computer, and its structural representation see Fig. 5, can comprise: image capture device, at the uniform velocity lining instrument, measuring instrument; Wherein, at the uniform velocity lining instrument comprises paintbrush, at the uniform velocity ruling on tested interactive intelligent tablet computer curtain;
Measuring instrument, displacement and interactive intelligent tablet computer curtain response paintbrush for obtaining paintbrush move the length of the line vestige of formation;
Image capture device catches the picture of line vestige, pen position and measuring instrument.
Carry out interactive intelligent tablet computer when to test time delay, tested interactive intelligent tablet computer is placed in the workbench shown in Fig. 5; This workbench can be desktop or other stilts.
Wherein in an embodiment, as shown in Figure 6, at the uniform velocity lining instrument also comprises tracks, drive motor, gearing and support; Paintbrush is removably fixed on support, and support is connected with gearing, and drive motor at the uniform velocity drive transmission moves in tracks; Corresponding tracks arranges measuring instrument.
Paintbrush is removably fixed on support, specifically includes but not limited to under type: chimeric, clamping, screw thread are fixing etc.
Generally speaking, make at the uniform velocity lining instrument straight line line in interactive intelligent tablet computer, can obtain test result more easily, be therefore rectilinear orbit by tracks; Measuring instrument is linear staff, parallel with tracks.
Measuring instrument also can adopt electronic measurement equipment, the speed/distance measuring unit often used in stadium as current.
Also tracks can be set to other shapes; As square, rectangle or circle etc., at this for circle, be described further, please refer to Fig. 7, tracks is set to circuit orbit; Measuring instrument is circular scale.
Concrete, can the radius of tracks be arranged larger than the radius of circular scale, when making at the uniform velocity lining instrument drive paintbrush to move, paintbrush can just move along the outer side edges edge of circular scale, like this, the picture by catching directly can read the line length of vestige and the shift position of paintbrush;
Or, as shown in Figure 8, tracks is set to circuit orbit; Measuring instrument is circular scale.
Concrete, can the radius of tracks be arranged larger than the radius of circular scale, when making at the uniform velocity lining instrument drive paintbrush to move, paintbrush can just move along the inner side edge edge of circular scale, like this, the picture by catching directly can read the line length of vestige and the shift position of paintbrush.
It should be noted that; when using the testing tool shown in Fig. 7 and Fig. 8 to test; due to the movement along with paintbrush; line vestige can repeat through a position, makes line vestige be difficult to differentiate the end of line vestige, therefore; this mode has some limitations; namely be the test being generally applicable to large-screen interactive Intelligent flat, when vestige of ruling forms a circle, line vestige need be removed and carry out next round test again.
Further, please refer to Fig. 9, in order to improve the precision of interactive intelligent tablet computer time delay further and improve test speed, touch time delay testing tool and also comprise processor;
Wherein, image capture device catches line vestige with the first predetermined time interval, and wherein, the first predetermined time interval was the time interval obtaining 2 pictures continuously; Processor is for obtaining the distance difference of the length of line vestige in every width picture and the displacement of paintbrush, and the ratio of the translational speed of the distance difference obtained in each width picture and paintbrush, when the difference of the maximal value of ratio and the minimum value of ratio is less than or equal to the refresh time of interactive intelligent tablet computer curtain, then obtain the time delay of minimum value as interactive intelligent tablet computer of ratio.
By above-mentioned process, the impact of interactive intelligent tablet computer refresh time can be eliminated, obtain more accurate interactive intelligent tablet computer time delay fast.
Due to the impact of predetermined time interval, interactive intelligent tablet computer can be made to produce certain error time delay, therefore, do following improvement: image capture device catches line vestige with the first predetermined time interval, wherein, the first predetermined time interval was the time interval obtaining 2 pictures continuously; Processor is for obtaining the distance difference of the length of line vestige in every width picture and the displacement of paintbrush, and the ratio of the translational speed of the distance difference obtained in each width picture and paintbrush, when the difference of the maximal value of ratio and the minimum value of ratio is less than or equal to refresh time and the difference of the second predetermined time interval of interactive intelligent tablet computer curtain, then obtain the time delay of minimum value as interactive intelligent tablet computer of ratio, wherein, the second predetermined time interval was camera shutter time.
This interactive intelligent tablet computer can based on but do not limit the operating systems such as windows, android, IOS.
The above embodiment only have expressed several embodiment of the present invention, and it describes comparatively concrete and detailed, but therefore can not be interpreted as the restriction to the scope of the claims of the present invention.It should be pointed out that for the person of ordinary skill of the art, without departing from the inventive concept of the premise, can also make some distortion and improvement, these all belong to protection scope of the present invention.Therefore, the protection domain of patent of the present invention should be as the criterion with claims.
Claims (9)
1. method of testing time delay for interactive intelligent tablet computer, is characterized in that, comprise step:
Paintbrush is at the uniform velocity moved on tested interactive intelligent tablet computer curtain;
Catch interactive intelligent tablet computer to respond described paintbrush and move the line vestige of formation, pen position and carry out the picture of the measuring instrument arranged in advance according to the movement of described paintbrush; Wherein, described measuring instrument is for the length of the displacement and described line vestige that obtain described paintbrush;
The length of described line vestige in acquisition picture and the distance difference of the displacement of described paintbrush;
Obtain the ratio of described distance difference and described paintbrush translational speed, obtain the time delay of interactive intelligent tablet computer.
2. method of testing time delay of interactive intelligent tablet computer according to claim 1, is characterized in that,
Described picture is caught with the first predetermined time interval; Wherein, described first predetermined time interval is the time interval obtaining 2 described pictures continuously;
Obtain the described distance difference in every width picture;
Obtain the ratio of described distance difference in each width picture and described paintbrush translational speed,
When the difference of the maximal value of described ratio and the minimum value of described ratio is less than or equal to the refresh time of described interactive intelligent tablet computer curtain, obtain the time delay of minimum value as interactive intelligent tablet computer of described ratio.
3. method of testing time delay of interactive intelligent tablet computer according to claim 1, is characterized in that,
Described picture is caught with the first predetermined time interval; Wherein, described first predetermined time interval is the time interval obtaining 2 described pictures continuously;
Obtain the described distance difference in every width picture;
Obtain the ratio of described distance difference in each width picture and described paintbrush translational speed,
When the difference of the maximal value of described ratio and the minimum value of described ratio is less than or equal to refresh time and the difference of the second predetermined time interval of described interactive intelligent tablet computer curtain, then obtain the time delay of minimum value as interactive intelligent tablet computer of described ratio; Wherein, described second predetermined time interval is camera shutter time.
4. method of testing time delay of the interactive intelligent tablet computer according to Claims 2 or 3, is characterized in that, described paintbrush uniform rectilinear on tested interactive intelligent tablet computer curtain is moved;
By the distance difference of the displacement of the paintbrush in picture described in adjacent 2 width divided by described first predetermined time interval, obtain the translational speed of described paintbrush.
5. testing tool time delay for interactive intelligent tablet computer, is characterized in that, comprising: image capture device, at the uniform velocity lining instrument, measuring instrument; Wherein, described at the uniform velocity lining instrument comprises paintbrush, at the uniform velocity ruling on tested interactive intelligent tablet computer curtain;
Described measuring instrument, displacement and interactive intelligent tablet computer curtain for obtaining described paintbrush respond the length that described paintbrush moves the line vestige of formation;
Described image capture device catches the picture of described line vestige, pen position and described measuring instrument;
Described time delay, testing tool also comprised processor;
Wherein, described image capture device catches described line vestige with the first predetermined time interval, and wherein, described first predetermined time interval is the time interval obtaining 2 described pictures continuously; Described processor is for obtaining the distance difference of the length of described line vestige in every width picture and the displacement of described paintbrush, and the ratio of the translational speed of the described distance difference obtained in each width picture and described paintbrush, when the difference of the maximal value of described ratio and the minimum value of described ratio is less than or equal to the refresh time of described interactive intelligent tablet computer curtain, obtain the time delay of minimum value as interactive intelligent tablet computer of described ratio.
6. testing tool time delay of interactive intelligent tablet computer according to claim 5, is characterized in that, described at the uniform velocity lining instrument also comprises tracks, drive motor, gearing and support; Described paintbrush is removably fixed on the bracket, and described support is connected with described gearing, and described drive motor at the uniform velocity drives described gearing to move in described tracks; The corresponding described tracks of described measuring instrument is arranged.
7. testing tool time delay of interactive intelligent tablet computer according to claim 6, is characterized in that, described tracks is rectilinear orbit; Described measuring instrument is linear staff, parallel with described tracks.
8. testing tool time delay of interactive intelligent tablet computer according to claim 6, is characterized in that,
Described tracks is circuit orbit; Described measuring instrument is circular scale.
9. testing tool time delay of the interactive intelligent tablet computer according to any one of claim 5 to 8, is characterized in that, described time delay, testing tool also comprised processor;
Wherein, described image capture device catches described line vestige with the first predetermined time interval, and wherein, described first predetermined time interval is the time interval obtaining 2 described pictures continuously; Described processor is for obtaining the distance difference of the length of described line vestige in every width picture and the displacement of described paintbrush, and the ratio of the translational speed of the described distance difference obtained in each width picture and described paintbrush, when the difference of the maximal value of described ratio and the minimum value of described ratio is less than or equal to refresh time and the difference of the second predetermined time interval of described interactive intelligent tablet computer curtain, then obtain the time delay of minimum value as interactive intelligent tablet computer of described ratio; Wherein, described second predetermined time interval is camera shutter time.
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| CN105067903B (en) * | 2015-07-16 | 2017-10-24 | 中国电子科技集团公司第五十五研究所 | A kind of method and apparatus for measuring the capacitive touch screen touch-responsive time |
| CN105954007B (en) * | 2016-05-18 | 2018-10-02 | 杭州映墨科技有限公司 | Delay test system and method for virtual implementing helmet acceleration movement |
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| CN110716671B (en) * | 2019-10-15 | 2023-06-27 | 京东方科技集团股份有限公司 | Electronic whiteboard and driving method thereof |
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