CN104079927A - Field angle measuring device - Google Patents
Field angle measuring device Download PDFInfo
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- CN104079927A CN104079927A CN201410320588.9A CN201410320588A CN104079927A CN 104079927 A CN104079927 A CN 104079927A CN 201410320588 A CN201410320588 A CN 201410320588A CN 104079927 A CN104079927 A CN 104079927A
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Abstract
The embodiment of the invention discloses a field angle measuring device. The field angle measuring device comprises a shelf, a scale graph display board and a support which separates the shelf and the scale graph display board. The shelf is parallel to the scale graph display board, the shelf is used for placing a terminal to be tested, and a hole is formed in the shelf and not smaller than a camera of the terminal to be tested in size. A field angle scale graph is displayed on one side, opposite to the shelf, of the scale graph display board and comprises a plurality of concentric circles marked with scales, the scales are used for expressing field angles corresponding to the concentric circles, and the sizes of the field angles of the concentric circles are determined by the distance between the shelf and the scale graph display board and the radiuses of the concentric circles. After the camera of the terminal to be tested is controlled to take photos for the scale graph display board through the hole in the shelf, and the field angle of the camera of the terminal to be tested can be determined according to the photos taken by the camera. According to the technical scheme, the field angle of the terminal can be measured visually and easily.
Description
Technical field
The present invention relates to digital electric field, be specifically related to a kind of angle of visual field measurement mechanism.
Background technology
At present, optical camera has been widely used in the mobile terminals such as mobile phone, camera, video camera.The size of the angle of visual field of optical camera has determined the field range of place mobile terminal, and the angle of visual field is larger, and the visual field is just larger.Generally, target object exceedes this angle and just can not be received in camera lens.
For mobile terminals such as mobile phone, camera, video cameras, because its photosurface is rectangle, therefore often calculate the angle of visual field with the cornerwise imaging thing of rectangle photosurface diameter, be called the diagonal angle of visual field, angle AOB as shown in Figure 1; Also have with the size of the horizontal direction of rectangle and calculate the angle of visual field, be called horizontal field of view angle, angle COD as shown in Figure 2; Also have with the size of the vertical direction of rectangle and calculate the angle of visual field, be called vertical field of view angle, angle EOF as shown in Figure 3.
When the at present test of the angle of visual field to mobile terminal in businessman or sales field, evaluation, comparison and publicity, generally by taking pictures, measure length and width and the diagonal data of corresponding scenery in the photo obtaining, calculate the angle of visual field of camera lens with Hook's law and antitrigonometric function, such method of testing is than more complicated and directly perceived not again.
Summary of the invention
In view of this, the embodiment of the present invention provides a kind of angle of visual field measurement mechanism, to solve the angle of visual field of camera in prior art measuring terminals than more complicated and problem not intuitively.
The angle of visual field measurement mechanism that the embodiment of the present invention provides, comprising:
Shelf, dial chart Graphic Panel, and the support that described shelf is separated with described dial chart Graphic Panel;
Described shelf is parallel with described dial chart Graphic Panel;
Described shelf is used for shelving terminal to be tested, on described shelf, has hole, and the size in described hole is not less than the size of the camera of terminal to be tested;
Described dial chart Graphic Panel shows angle of visual field dial chart in a side relative with described shelf, described angle of visual field dial chart comprises the graduated concentric circles of multiple signs, described scale is used for representing corresponding concentrically ringed angle of visual field size, described concentrically ringed angle of visual field size is according to the distance between described shelf and described dial chart Graphic Panel, and described concentrically ringed radius is determined;
After the camera of controlling described terminal to be tested is taken pictures to described dial chart Graphic Panel through the described hole on described shelf, determine the angle of visual field of the camera of described terminal to be tested according to the captured photograph of described camera.
Further, the line that the hole on the concentrically ringed center of circle and described shelf that described dial chart Graphic Panel is shown forms is vertical with described dial chart Graphic Panel with described shelf.
Further, determine that according to the captured photograph of described camera the angle of visual field of the camera of described terminal to be tested specifically comprises:
According to the concentrically ringed corresponding scale of outermost in the captured photograph of described camera, determine the angle of visual field of the camera of described terminal to be tested.
Further, described device also comprises data reception module and processor;
Described data reception module is used for receiving captured photograph from described terminal to be tested, and this photograph is sent to processor;
Described processor is connected with described data reception module, and the photograph of sending for receiving described data reception module, by carrying out the angle of visual field of the camera of terminal to be tested described in Analysis deterrmination to described photograph.
Further, described data reception module is near radio transport module.
Further, described angle of visual field dial chart is coating or the poster of a side relative with described shelf on described dial chart Graphic Panel.
Further, described dial chart Graphic Panel is electronic display.
Further, described support is variable height support, described electronic display is connected with described processor respectively with described support, described processor also for the height of controlling described support to adjust the distance between described shelf and described dial chart Graphic Panel, determine concentrically ringed number and each concentrically ringed radius according to described distance, determined concentrically ringed number and each concentrically ringed radius are sent to described electronic display;
Described electronic display is drawn according to received concentrically ringed number and each concentrically ringed radius and is shown described angle of visual field dial chart.
The technical scheme of the embodiment of the present invention comprises shelf by open one, dial chart Graphic Panel, and the angle of visual field measurement mechanism of the support that described shelf is separated with described dial chart Graphic Panel, realize after the camera of controlling terminal to be tested is taken pictures to described dial chart Graphic Panel through the hole on shelf, determine the angle of visual field of the camera of described terminal to be tested according to the captured photograph of described camera.Can be intuitively the angle of visual field of measuring terminals simply.
Brief description of the drawings
In order to be illustrated more clearly in the technical scheme in the embodiment of the present invention, below the accompanying drawing of required use during the embodiment of the present invention is described is briefly described, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, do not paying under the prerequisite of creative work, can also obtain according to the content of the embodiment of the present invention and these accompanying drawings other accompanying drawing.
Fig. 1 is the diagonal angle of visual field schematic diagram shown in background technology;
Fig. 2 is the horizontal field of view angle schematic diagram shown in background technology;
Fig. 3 is the vertical field of view angle schematic diagram shown in background technology;
Fig. 4 is the structured flowchart of the angle of visual field measurement mechanism described in the embodiment of the present invention one;
Fig. 5 is the schematic diagram of the angle of visual field dial chart described in the embodiment of the present invention one;
Fig. 6 is concentric circles angle schematic diagram in the dial chart Graphic Panel described in the embodiment of the present invention one;
Fig. 7 is that the angle of visual field described in the embodiment of the present invention one is calculated schematic diagram;
Fig. 8 is the schematic diagram of the image reading angle of visual field of taking by camera described in the embodiment of the present invention one.
Embodiment
For the technical scheme of technical problem that the present invention is solved, employing and the technique effect that reaches clearer, below in conjunction with accompanying drawing, the technical scheme of the embodiment of the present invention is described in further detail, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiment.Based on the embodiment in the present invention, those skilled in the art, not making the every other embodiment obtaining under creative work prerequisite, belong to the scope of protection of the invention.
Further illustrate technical scheme of the present invention below in conjunction with accompanying drawing and by embodiment.
Embodiment mono-
Fig. 4 is the structured flowchart of the angle of visual field measurement mechanism described in the embodiment of the present invention one, and as shown in Figure 4, the angle of visual field testing apparatus described in the present embodiment comprises:
Shelf 401, dial chart Graphic Panel 402, and the support 403 that described shelf 401 is separated with described dial chart Graphic Panel 402;
Described shelf 401 is parallel with described dial chart Graphic Panel 402;
Described shelf 401, for shelving terminal to be tested, has hole 404 on described shelf 401, and the size in described hole 404 is not less than the size of the camera of terminal to be tested;
Described dial chart Graphic Panel 402 shows angle of visual field dial chart in a side relative with described shelf 401, described angle of visual field dial chart comprises the graduated concentric circles of multiple signs, described scale is used for representing corresponding concentrically ringed angle of visual field size, described concentrically ringed angle of visual field size is according to the distance between described shelf 401 and described dial chart Graphic Panel 402, and described concentrically ringed radius is determined;
After the camera of controlling described terminal to be tested is taken pictures to described dial chart Graphic Panel 402 through the described hole 404 on described shelf 401, determine the angle of visual field of the camera of described terminal to be tested according to the captured photograph of described camera.
Wherein, as shown in Figure 5, in dial chart Graphic Panel, concentric circles angle schematic diagram as shown in Figure 6 for the schematic diagram of the angle of visual field dial chart on the dial chart Graphic Panel that described dial chart Graphic Panel 402 shows in a side relative with described shelf 401.It should be noted that, in angle of visual field dial chart, concentrically ringed number, and each concentrically ringed radius can set arbitrarily, if the scale of the corresponding expression angle of visual field of each concentric circles size, with corresponding radius coupling.
Particularly, judge whether concentrically ringed scale mates with this concentrically ringed radius, the tangent value that need to meet the angle that number of division (or signal numerical value of number of division) is corresponding equals this concentric circles radius divided by the distance between described shelf 401 and described dial chart Graphic Panel 402, Fig. 7 is that the angle of visual field described in the present embodiment is calculated schematic diagram, as shown in Figure 7, the position that O is camera, C is the concentrically ringed center of circle, from right-angled triangle tangent formula
?
the concentrically ringed angle of visual field number of degrees are 2 θ, and this concentrically ringed scale is determined according to these the concentrically ringed number of degrees 2 θ.Concrete definite mode can be various ways, below enumerates the mode of two kinds of definite concentric circles scales.
Mode one, to each concentric circles, directly identify each concentrically ringed angle of visual field number of degrees, the angle of visual field number of degrees that obtain according to concentric circles radius according to above-mentioned computing formula, i.e. 2 θ at correspondence position;
Mode two, to each concentric circles, directly identify the half of each concentrically ringed angle of visual field number of degrees at correspondence position, obtain according to concentric circles radius according to above-mentioned computing formula
be θ.
For example, if the captured dial chart Graphic Panel of camera comprises the part as shown in rectangle in Fig. 8, as shown in Figure 8, each concentrically ringed scale is followed successively by 10 degree from inside to outside, 20 degree, 40 degree, 45 degree, 55 degree, and 75 degree.If this scale is pass-through mode one mark, the diagonal angle of visual field of this camera is 75 degree, and horizontal field of view angle is 55 degree, and vertical field of view angle is 45 degree; If this scale is pass-through mode two marks, the diagonal angle of visual field of this camera is 150 degree (75*2), and horizontal field of view angle is 110 degree (55*2), and vertical field of view angle is 90 degree (45*2).
Certainly, included concentric circles in exemplary plot illustrated in fig. 8, just included the circumscribed circle of the figure captured to camera, with the tangent circle of horizontal sides and the circle tangent with perpendicular edge, so it is very directly perceived to read corresponding scale, if there is no just corresponding concentric circles, can estimate according to end points and inside and outside two concentrically ringed distances.The for example annulus center of end points in two concentric circles compositions, two concentrically ringed angle of visual field scales are respectively 20 degree and 30 degree, can estimate that the angle of visual field that this end points is corresponding is 25 degree.
In general, the line that requires the hole on described dial chart the Graphic Panel shown concentrically ringed center of circle and described shelf to form is vertical with described dial chart Graphic Panel with described shelf.Therefore, the figure in the captured dial chart Graphic Panel of camera, should be Central Symmetry.But, if camera is offset to some extent, or on dial chart Graphic Panel, shown dial chart shows deviation, the captured figure of camera there will be left-right asymmetry or upper and lower asymmetric situation, if not too strict to certainty of measurement requirement, concentrically ringed angle corresponding to cornerwise two end points can be averaging as the diagonal angle of visual field; Concentrically ringed angle corresponding to horizontal two end points can be averaging as horizontal field of view angle; Concentrically ringed angle corresponding two of a vertical line end points can be averaging as vertical field of view angle.If scale is pass-through mode one mark, the angle directly two concentric circless corresponding to end being marked is added; If scale is pass-through mode two marks, need the angle first two concentric circless corresponding to end being marked to be added again divided by 2.
The technical scheme of the present embodiment comprises shelf by open one, dial chart Graphic Panel, and the angle of visual field measurement mechanism of the support that described shelf is separated with described dial chart Graphic Panel, realize after the camera of controlling terminal to be tested is taken pictures to described dial chart Graphic Panel through the hole on shelf, determine the angle of visual field of the camera of described terminal to be tested according to the captured photograph of described camera.Can be intuitively the angle of visual field of measuring terminals simply.
Embodiment bis-
For embodiment mono-, after the camera of controlling described terminal to be tested is taken pictures to described dial chart Graphic Panel through the described hole on described shelf, determine that according to the captured photograph of described camera the mode of the angle of visual field of the camera of described terminal to be tested comprises multiple, include but not limited to read by human eye Direct Recognition.The present embodiment is on the basis of embodiment mono-, automatically determines the angle of visual field of the camera of described terminal to be tested by increase data reception module and processor on device.
Particularly, the functions of modules increasing is respectively:
Described data reception module is used for receiving captured photograph from described terminal to be tested, and this photograph is sent to processor;
Described processor is connected with described data reception module, and the photograph of sending for receiving described data reception module, by carrying out the angle of visual field of the camera of terminal to be tested described in Analysis deterrmination to described photograph.
Particularly, the mode that processor obtains the angle of visual field of camera is also followed the computational methods described in embodiment mono-.If the concentric circles density of angle of visual field dial chart is enough large, or the angle of visual field can be carried out accommodation, each end points all can find the concentric circles at place, first-selection is carried out image recognition to photograph, with respect to the position of angle of visual field dial chart, identify cornerwise end points in photograph, horizontal line and concentrically ringed point of contact, and vertical line and concentrically ringed point of contact, obtain concentric circles corresponding to these some difference, determine the corresponding angle of visual field of these concentric circless, respectively as the diagonal angle of visual field, horizontal field of view angle and the vertical field of view angle of this camera.If angle of visual field density is large not, exist end points not on any concentric circles, calculate according to preset algorithm or estimate.The for example annulus center of end points in two concentric circles compositions, two concentrically ringed angle of visual field scales are respectively 20 degree and 30 degree, can estimate that the angle of visual field that this end points is corresponding is 25 degree.
Preferably, described data reception module is near radio transport module.Such as Wireless Fidelity WIFI, bluetooth etc.
The present embodiment has increased data reception module and processor on the basis of embodiment mono-, can realize and automatically measure the angle of visual field, makes the measurement of the angle of visual field easier.
Embodiment tri-
For embodiment mono-or embodiment bis-, described angle of visual field dial chart can be the content of coating, poster or the electronic display screen displays of a side relative with described shelf on described dial chart Graphic Panel etc.If described angle of visual field dial chart is coating, poster etc., described support must, for can be fixed support, so that the distance of camera and dial chart Graphic Panel is fixed, make scale and practical field of view angle automatching on coating, poster.If support height changes, coating, poster etc. also need correspondingly to change.If described angle of visual field dial chart is electronic display, described support can change flexibly, and in angle of visual field dial chart, concentrically ringed number and each concentrically ringed radius can carry out accommodation according to the shooting results of camera, directly to read the angle of visual field from angle of visual field dial chart, the accuracy of measuring to improve the angle of visual field.
In angle of visual field measurement mechanism shown in the present embodiment, described support is variable height support, and angle of visual field dial chart passes through electronic display screen displays.In the present embodiment, wherein, described electronic display is connected with described processor respectively with described support, described processor also for the height of controlling described support to adjust the distance between described shelf and described dial chart Graphic Panel, determine concentrically ringed number and each concentrically ringed radius according to described distance, determined concentrically ringed number and each concentrically ringed radius are sent to described electronic display.Described electronic display is drawn according to received concentrically ringed number and each concentrically ringed radius and is shown described angle of visual field dial chart.
On the basis of embodiment bis-, in the angle of visual field measurement mechanism shown in the present embodiment, described support is variable height support, and angle of visual field dial chart is by electronic display screen displays, has increased the flexibility ratio of device, has improved the accuracy that the angle of visual field is measured.
All or part of content in the technical scheme that above embodiment provides can realize by software programming, and its software program is stored in the storage medium can read, storage medium for example: hard disk, CD or floppy disk in computer.
Note, above are only preferred embodiment of the present invention and institute's application technology principle.Skilled person in the art will appreciate that and the invention is not restricted to specific embodiment described here, can carry out for a person skilled in the art various obvious variations, readjust and substitute and can not depart from protection scope of the present invention.Therefore, although the present invention is described in further detail by above embodiment, the present invention is not limited only to above embodiment, in the situation that not departing from the present invention's design, can also comprise more other equivalent embodiment, and scope of the present invention is determined by appended claim scope.
Claims (8)
1. an angle of visual field measurement mechanism, is characterized in that, comprising:
Shelf, dial chart Graphic Panel, and the support that described shelf is separated with described dial chart Graphic Panel;
Described shelf is parallel with described dial chart Graphic Panel;
Described shelf is used for shelving terminal to be tested, on described shelf, has hole, and the size in described hole is not less than the size of the camera of terminal to be tested;
Described dial chart Graphic Panel shows angle of visual field dial chart in a side relative with described shelf, described angle of visual field dial chart comprises the graduated concentric circles of multiple signs, described scale is used for representing corresponding concentrically ringed angle of visual field size, described concentrically ringed angle of visual field size is according to the distance between described shelf and described dial chart Graphic Panel, and described concentrically ringed radius is determined;
After the camera of controlling described terminal to be tested is taken pictures to described dial chart Graphic Panel through the described hole on described shelf, determine the angle of visual field of the camera of described terminal to be tested according to the captured photograph of described camera.
2. angle of visual field measurement mechanism according to claim 1, is characterized in that, the line that the hole on the concentrically ringed center of circle and described shelf that described dial chart Graphic Panel is shown forms is vertical with described dial chart Graphic Panel with described shelf.
3. angle of visual field measurement mechanism according to claim 2, is characterized in that, determines that according to the captured photograph of described camera the angle of visual field of the camera of described terminal to be tested specifically comprises:
According to the concentrically ringed corresponding scale of outermost in the captured photograph of described camera, determine the angle of visual field of the camera of described terminal to be tested.
4. angle of visual field measurement mechanism according to claim 1, is characterized in that, described device also comprises data reception module and processor;
Described data reception module is used for receiving captured photograph from described terminal to be tested, and this photograph is sent to processor;
Described processor is connected with described data reception module, and the photograph of sending for receiving described data reception module, by carrying out the angle of visual field of the camera of terminal to be tested described in Analysis deterrmination to described photograph.
5. angle of visual field measurement mechanism according to claim 4, is characterized in that, described data reception module is near radio transport module.
6. according to the arbitrary described angle of visual field measurement mechanism of claim 1-5, it is characterized in that, described angle of visual field dial chart is coating or the poster of a side relative with described shelf on described dial chart Graphic Panel.
7. according to the arbitrary described angle of visual field measurement mechanism of claim 4-5, it is characterized in that, described dial chart Graphic Panel is electronic display.
8. angle of visual field measurement mechanism according to claim 7, it is characterized in that, described support is variable height support, described electronic display is connected with described processor respectively with described support, described processor also for the height of controlling described support to adjust the distance between described shelf and described dial chart Graphic Panel, determine concentrically ringed number and each concentrically ringed radius according to described distance, determined concentrically ringed number and each concentrically ringed radius are sent to described electronic display;
Described electronic display is drawn according to received concentrically ringed number and each concentrically ringed radius and is shown described angle of visual field dial chart.
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| CN108093247A (en) * | 2017-12-15 | 2018-05-29 | 信利光电股份有限公司 | A kind of test method of field angle of camera lens and test system |
| CN108918098A (en) * | 2018-08-24 | 2018-11-30 | 天津市医疗器械质量监督检验中心 | The test method of entrance pupil field angle under a kind of medical endoscope rectangular field |
| CN108918098B (en) * | 2018-08-24 | 2020-03-31 | 天津市医疗器械质量监督检验中心 | Method for testing entrance pupil field angle of medical endoscope in rectangular field of view |
| CN109104606A (en) * | 2018-10-25 | 2018-12-28 | 公安部第三研究所 | The system and method at rapid survey video camera inclination angle and field angle |
| CN109104606B (en) * | 2018-10-25 | 2022-03-15 | 公安部第三研究所 | System and method for rapidly measuring inclination angle and field angle of camera |
| CN109218720A (en) * | 2018-11-15 | 2019-01-15 | Oppo（重庆）智能科技有限公司 | A kind of detection jig for structure optical mode group |
| CN110987375A (en) * | 2019-12-10 | 2020-04-10 | 杭州涂鸦信息技术有限公司 | Method for measuring angle of field of view of camera |
| CN113727010A (en) * | 2020-05-26 | 2021-11-30 | 希姆通信息技术（上海）有限公司 | Multi-camera angle of view correction method, system, medium, and electronic device |
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