CN100541325C - Transmission type film test card and using method thereof that a kind of Camera Test uses - Google Patents
Transmission type film test card and using method thereof that a kind of Camera Test uses Download PDFInfo
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- CN100541325C CN100541325C CNB2006100210293A CN200610021029A CN100541325C CN 100541325 C CN100541325 C CN 100541325C CN B2006100210293 A CNB2006100210293 A CN B2006100210293A CN 200610021029 A CN200610021029 A CN 200610021029A CN 100541325 C CN100541325 C CN 100541325C
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- 238000012360 testing method Methods 0.000 title claims abstract description 93
- 230000005540 biological transmission Effects 0.000 title claims abstract description 39
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- 230000003044 adaptive effect Effects 0.000 claims description 5
- 238000003384 imaging method Methods 0.000 description 4
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- 238000010998 test method Methods 0.000 description 4
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- 241000226585 Antennaria plantaginifolia Species 0.000 description 2
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Abstract
The invention discloses transmission type film test card and using method thereof that a kind of Camera Test uses, the transmission type film test card surface pattern is a grid, some concentric circless are arranged on the background, and laterally reaching diagonal has digital scale, and the center with anchor point effect is exactly the concentrically ringed center of circle.The present invention is used for the field angle of testing lens owing to designed the concentric circles that has scale on form, designed lattice and has been used for the distortion of testing lens.Therefore with a transmission type film test card, once use the optic test that just can just can finish more than two.
Description
Technical field
The present invention relates to the test card of a kind of optical test method and use thereof, refer in particular to the transmission type film test card of a kind of Camera Test method and use thereof.
Background technology
More and more higher with the requirement of camera image quality to mobile phone at present, also various day by day meticulous to the test event of its module optical property, wherein requisite is exactly optical test chart.In the conventional test methodologies, the reflective dull and stereotyped test card of many employings, and each test event all need be equipped with the test card of different patterns when carrying out, as is used for the identification resolution chart of measuring resolution, the grey level histogram of testing gray scale, the conforming radiation star test card of test or the like.Need during test the test card of corresponding uses is taken pictures respectively, analyze the gained photo again and obtain required result.Because specification is variant unavoidably between the different test cards, the position can change when varying, and all needs the focusing of focusing once more when therefore taking pictures at every turn, and the optic test project is to illumination, uniformity coefficient has special requirement, for guaranteeing precision, also should finely tune the environment lighting again after varying.From top described method of testing as can be seen, if want to test a plurality of projects, must need during test constantly to change and adjust with different test cards.In addition, some project can not directly be found out effect, as mensuration to the module field angle, need use standard light apart from seat, the standard size that certain distance is outer is taken pictures, apart from coordinate degree (object distance), just can obtain field angle size after calculating by formula tan (θ/2) * object distance=image height/2 according to the length of the scale that shows on the photo (being the imaging image height) and light.
Summary of the invention
One of technical matters to be solved by this invention provides a kind of transmission type film test card that is applicable to multinomial optic test.
Transmission type film test card surface pattern of the present invention is a grid, and some concentric circless are arranged on the background, and laterally reaching diagonal has digital scale, and the center with anchor point effect is exactly the concentrically ringed center of circle.
Be provided with the gray scale test-strips in the circle of described concentric circles innermost layer, do not have lattice in the circle of innermost layer.Can carry out the gray scale test so simultaneously.Such gray scale test-strips can be provided with two gray scale test-strips, lay respectively at the center of circle up and down or about.Described gray scale test-strips is nine lattice or five lattice.
Be provided with the resolution test pattern in the circle of described concentric circles innermost layer, do not have lattice in the circle of innermost layer.Can carry out resolution test simultaneously like this.Such resolution test pattern can be provided with two fan molded lines bar patterns, lay respectively at the center of circle up and down or about.
There is the location indicateing arm on described pattern four limits.The size of the picture of getting in the time of can determining to take pictures like this makes the effect of test more clear.
Described grid background is the black line with the vertical interlaced in length and breadth of center of circle symmetrical distribution, and the ranks spacing all equates to be 0.1cm-5cm.Adopt straight-line pattern to be because human eye is responsive to the bend ratio of straight line, and staggered straight line can be tested horizontal and vertical amount of distortion simultaneously.Because the distortion of whole image field is not an even definite value, but changes along with the different of image height and pore size, adopt square net to be easy to find out the difference of different image fields place distortion size.Lattice between the spacing 0.1-5cm, line-spacing density is suitable, and human eye is also the most responsive to its crooked change after the imaging.
Each circle spacing of described concentric circles is unequal, and the scale on the digital scale of horizontal and diagonal is non-homogeneous.Because the analysis to the image planes image quality is representative with some important visual field, as the center image field, 0.5 image field, 0.7 image fields etc. roughly identify important field positions with not equidistant concentric circles, can measure the image quality of these visual fields to straight line and circular arc simultaneously.The interannular scale was once adding an expression field angle increase, because field angle and image height are nonlinear relationship, thereby graduated scale is non-homogeneous.
Described transmission type film test card is installed in the lamp box.Can guarantee that like this light injects transmission type film test card with angle preferably.
Described lamp box is the transverse seal formula, one slit is arranged at the bottom, the square aperture adaptive with the transmission type film test card specification arranged over against light source the place ahead, the slidably framework of built-in installation transmission type film test card, the handle that control framework slides exposes from the slit of bottom.
Two of technical matters of the present invention provides a kind of method of testing that is applicable to the transmission type film test card of multinomial optic test.May further comprise the steps:
A, film test card is snapped in the framework of the adaptive specification in the lamp box, adjust the border that each several part makes the positioning mark positive sense square aperture on grid four limits, described square aperture is positioned at the one side of lamp box over against light source, and anchor point is exactly the positive center of pattern;
B, the cell-phone camera module is positioned over transmission type film test card dead ahead optimum distance L (for definite value) locates, adjust focal length;
C, transmission type film test card is taken pictures, begin test.
Framework described in the described steps A is a slidably framework that can successively the target test card be snapped in by the test event order in advance.
Described method also comprises step D, uses color monitor and oscillograph etc. can figure (picture) further be analyzed, and obtains more information.
The present invention is used for the field angle of testing lens owing to designed the concentric circles that has scale on form, designed lattice and has been used for the distortion of testing lens.Therefore with a transmission type film test card, once use the optic test that just can just can finish more than two.
Description of drawings
Reflective test acquiescence darkroom is provided with synoptic diagram in Fig. 1 embodiment of the invention.
Transmission type film test card figure master drawing in Fig. 2 embodiment of the invention.
Lamp box structure synoptic diagram in Fig. 3 embodiment of the invention.
The invention will be further described below in conjunction with the drawings and specific embodiments.
Embodiment
Referring to Fig. 1, Fig. 2, Fig. 3.
Transmission type film test card surface pattern among the embodiment is a grid, some concentric circless are arranged on the background, laterally reach diagonal digital scale is arranged, center with anchor point effect is exactly the concentrically ringed center of circle, the both sides in the center of circle have two to be used for the fan molded lines bar pattern that resolution detects, one nine lattice that respectively have up and down in the center of circle are tested grayscale bar, the progressive inverted sequence of grayscale bar color is arranged, fan molded lines bar pattern, test grayscale bar are positioned at the circle of innermost layer, do not have lattice in the circle of innermost layer, there is the location indicateing arm on four limits.Described grid background is the black line with the vertical interlaced in length and breadth of centre spot (being the center of circle) symmetrical distribution, and the ranks spacing all equates to be 0.1-5cm.Each circle spacing of described concentric circles is unequal.Scale on the digital scale of horizontal and diagonal is non-homogeneous.
Lighting 1 and lighting 2 are mapped to transmission type film test card with the directions of 45 degree, and the shooting module is object distance L with the distance of transmission type film test card, are connected with the display that can further analyze figure (picture) behind the module of making a video recording.
Referring to Fig. 3, described transmission type film test card 33 is installed in the lamp box.Lamp box shell 34 is the transverse seal formula, the bottom has one narrowly to meet 35, the square aperture 36 adaptive with the transmission type film test card specification arranged over against light source the place ahead, the slidably framework 32 of built-in installation transmission type film test card card, the handle 31 that control framework slides exposes from the slit of bottom.Transmissible optical source adopts 1 * 12V/50W bulb; Colour temperature: 3200 ° of K+/-50 ° K (other colour temperatures can realize with color filter); Adjustable brightness scope: 1: 100 (not influencing colour temperature).
Brief description is the method for testing of the transmission type film test card among the embodiment once.
A, film test card is snapped in the framework of adaptive specification, adjust the positioning mark positive sense square opening border that each several part makes form four limits, anchor point is sitting at the positive center of pattern;
B, the cell-phone camera module is positioned over transmission type film test card dead ahead optimum distance L (for definite value) locates, adjust focal length;
C, transmission type film test card is taken pictures, begin test.
D, use color monitor and oscillograph etc. can further be analyzed figure (picture), obtain more information.
During shooting, also can locate and focus according to the position of anchor point and positioning mark.
Background is the black line of vertical interlaced in length and breadth that is symmetrically distributed with centre spot, and the ranks spacing all equates to be 0.1-5cm, constitutes the square net pattern.Can test distortion situation, particularly TV-distortion after taking pictures.Distortion can cause into the image curvature distortion, promptly makes after the straight line imaging it no longer is straight line and become curve, and the pincushion distortion meeting causes that the straight line indent forms pincushion distortion, and barrel distortion can make the straight line evagination form barrel distortion.And distortion changes with the visual field is different, analyzes the deformation of the grid on the gained imaging picture, just can draw the size of the horizontal and vertical distortion in different image fields place and positive and negative.
According to the graduated scale of horizontal and diagonal, can directly on figure, read the angle of view after taking pictures.
According to the digital scale on the fan-shaped lines, can testing lens resolution.
According to nine lattice grayscale bar, can test gray scale.
If any special requirement, when needing simultaneously to use other transmission type film test cards, can successively object penetrating formula film test card be snapped in the framework by the test event order in advance.As test to color reducibility, as long as additional same specification color film is contained in slidably on the framework, has clapped one after, the pulling handle just can be converted to next transmission type film test card, need not focus to target pattern again at this moment, directly can take.
From the shooting results picture, just can directly read the field angle of testing lens, and finish lens distortion (especial TV-distortion), resolution, the test of gray scale simultaneously.Simultaneously, use color monitor and oscillograph etc. can figure (picture) further be analyzed, obtain more information.
Claims (8)
1, a kind of transmission type film test card of Camera Test use, it is characterized in that: the transmission type film test card surface pattern is a grid, described grid background is the black line with the vertical interlaced in length and breadth of center of circle symmetrical distribution, the ranks spacing all equates to be 0.1cm-5cm, some concentric circless are arranged on the background, laterally reaching diagonal has digital scale, and the center with anchor point effect is exactly the concentrically ringed center of circle.
2, transmission type film test card according to claim 1 is characterized in that: be provided with the gray scale test-strips in the circle of described concentric circles innermost layer, do not have lattice in the circle of innermost layer.
3, transmission type film test card according to claim 1 is characterized in that: be provided with the resolution test pattern in the circle of described concentric circles innermost layer, do not have lattice in the circle of innermost layer.
4, transmission type film test card according to claim 1 is characterized in that: there is the location indicateing arm on described pattern four limits.
5, according to claim 1 or 2 or 3 or 4 described transmission type film test cards, it is characterized in that: each circle spacing of described concentric circles is unequal, and the scale on the digital scale of horizontal and diagonal is non-homogeneous.
6, transmission type film test card according to claim 1 is characterized in that: described transmission type film test card is installed in the lamp box.
7, the using method of the transmission type film test card described in the claim 1 may further comprise the steps:
A, film test card is snapped in the framework of the adaptive specification in the lamp box, adjust the border that each several part makes the positioning mark positive sense square aperture on grid four limits, described square aperture is positioned at the one side of lamp box over against light source, and anchor point is exactly the positive center of pattern;
B, the cell-phone camera module is positioned over transmission type film test card dead ahead optimum distance L (for definite value) locates, adjust focal length;
C, transmission type film test card is taken pictures, begin test.
8, method according to claim 7 is characterized in that: also comprise step D, use color monitor and oscillograph etc. can figure or picture further be analyzed, obtain more information.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100210293A CN100541325C (en) | 2006-05-22 | 2006-05-22 | Transmission type film test card and using method thereof that a kind of Camera Test uses |
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2006100210293A CN100541325C (en) | 2006-05-22 | 2006-05-22 | Transmission type film test card and using method thereof that a kind of Camera Test uses |
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| Publication Number | Publication Date |
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| CN101078872A CN101078872A (en) | 2007-11-28 |
| CN100541325C true CN100541325C (en) | 2009-09-16 |
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| CN102740110A (en) * | 2012-05-31 | 2012-10-17 | 惠州Tcl移动通信有限公司 | Detection method of picture dark corner and mobile equipment |
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| CN104079927B (en) * | 2014-07-07 | 2016-04-20 | 广东欧珀移动通信有限公司 | A kind of angle of visual field measurement mechanism |
| CN105306929B (en) * | 2015-11-24 | 2017-03-29 | 福建福光股份有限公司 | Fish eye lens angle of visual field rapid evaluation tool and its using method |
| CN106525393B (en) * | 2017-01-17 | 2019-05-10 | 福建师范大学 | An industrial camera lens optical projection detection resolution board |
| CN107421406B (en) * | 2017-09-06 | 2023-03-24 | 四川为天建设工程检测有限公司 | Polygonal film ruler |
| CN110274752A (en) * | 2018-03-14 | 2019-09-24 | 深圳市隆测技术有限公司 | The Multifunctional test card and its test method of relay lens image quality |
| CN108632605A (en) * | 2018-06-11 | 2018-10-09 | 昆山星际舟智能科技有限公司 | Active focusing mechanism |
| CN108646514B (en) * | 2018-07-05 | 2024-04-16 | Oppo广东移动通信有限公司 | Camera resolution test chart |
| CN109104579B (en) * | 2018-09-30 | 2020-11-13 | 易诚高科（大连）科技有限公司 | Automatic evaluation and adjustment method for photographing environment in image quality evaluation process |
| CN112887704B (en) * | 2019-11-29 | 2023-08-04 | 北京小米移动软件有限公司 | Camera performance test card and camera test system |
| CN114216656B (en) * | 2021-12-13 | 2024-11-22 | 惠州Tcl移动通信有限公司 | Camera blur effect performance test card, system and preparation method |
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2006
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6195159B1 (en) * | 1998-12-30 | 2001-02-27 | Agfa Corporation | Lens testing system |
| CN1401982A (en) * | 2001-08-22 | 2003-03-12 | 精工爱普生株式会社 | Lens detecting device and detecting sheet |
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Effective date of registration: 20150916 Address after: 518119 Guangdong province Shenzhen City Dapeng new Kwai town Yanan Road No. 1 building experimental Byd Co Patentee after: SHENZHEN BYD ELECTRONIC COMPONENT Co.,Ltd. Address before: Kwai Chung town Yanan Road, BYD Industrial Park in Longgang District of Shenzhen City, Guangdong province 518119 Patentee before: BYD Co.,Ltd. |
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Address after: 518119 Guangdong province Shenzhen City Dapeng new Kwai town Yanan Road No. 1 building experimental Byd Co Patentee after: Shenzhen helitai photoelectric Co.,Ltd. Address before: 518119 Guangdong province Shenzhen City Dapeng new Kwai town Yanan Road No. 1 building experimental Byd Co Patentee before: SHENZHEN BYD ELECTRONIC COMPONENT Co.,Ltd. |
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