CN103731665B - digital camera image quality comprehensive detection device and method - Google Patents
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- CN103731665B CN103731665B CN201310739132.1A CN201310739132A CN103731665B CN 103731665 B CN103731665 B CN 103731665B CN 201310739132 A CN201310739132 A CN 201310739132A CN 103731665 B CN103731665 B CN 103731665B
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Abstract
The invention discloses a kind of digital camera image quality comprehensive detection device and method, described digital camera image quality comprehensive detection device comprises lamp box and test card, described lamp box is the rectangular structure of one end open, its lighting environment provided meets the world, domestic standard to the requirement detecting lighting environment, and described test card is fixed on the backboard central authorities of described lamp box; Described test card comprises test section and scale district, and test section comprises the pattern detected the project such as resolution, distortion, and scale district is used for detection and finds a view visual field rate.Above-mentioned digital camera image quality comprehensive detection device achieves the integration of photographic subjects and lighting environment, and resolution can be obtained simultaneously, distort, the relevant information of several parameters such as visual field rate of finding a view.Described detection method eliminates in universal test method and adjusts lighting environment, change the step of test card and the setting of adjustment camera, improves checkability.
Description
Technical field
The present invention relates to digital camera images quality testing field, particularly relate to digital camera image quality comprehensive detection device and method.
Background technology
Digital camera image quality comprehensive evaluation relates to the test to resolution, distortion, GTG, noise, color rendition, imagewise uniform degree, white balance, exposure error, numerous parameters such as visual field rate of finding a view.International Organization for standardization has successively promulgated multiple standard, such as ISO12233, ISO15739, ISO14524 etc. for the method for testing of digital camera, and logarithmic code camera image resolution, noise, opto-electronic conversion function method of testing specify respectively.For effective execution technique regulation, enterprise's testing department, research and development of products department and social quality surveillance testing agency etc., all need establishing criteria to set up corresponding detectability.China has has formally issued and implemented " GB/T29298-2012 numeral (code) camera general specification " in 2013, in this standard, the parameters of logarithmic code camera has done technical requirement, and is specified method of testing.
But in the guide of numerous standards and practical operation, the image detecting parameters all needs to gather respectively.Particularly for the test item needing reflective test card, such as, measuring resolution uses resolution chart, and distortion figure etc. is used in test distortion.After each parameter photographic images, all need to carry out a test card and change the collection can carrying out next parametric image.Due to the difference of specification between different test card, both needed after changing card to readjust ambient lighting light fixture, and to obtain the luminous environment of compound standard-required, needed again to readjust digital camera to obtain best shooting effect.So repeatedly, waste resource and the time.
Summary of the invention
The object of the invention is integration testing equipment, simplify test program, use a table apparatus, once take, complete digital camera resolution, distort, the isoparametric detection of visual field rate of finding a view.
One of technical problem to be solved by this invention is to provide a kind of method that logarithmic code camera carries out resolution, distorts, the parameters such as visual field rate of finding a view carry out detecting.Comprise the following steps:
1) open digital camera image quality comprehensive detection device, treat light stability 25-35 minute;
2) digital camera to be checked is positioned over the dead ahead of described digital camera image quality comprehensive detection device, adjustment measuring distance, make test section just be full of view finder, scale district does not just appear in view finder;
3) double frequency annulus is used to focus;
4) to test section, comprise the wedge shape resolution test line at central authorities and corner place, distortion test cross, horizontal direction frequency conversion square wave, horizontal direction low dip square-wave pulse, vertical direction frequency conversion square wave, vertical direction low dip square-wave pulse, test circle, image compression observation area, take, obtain detecting photo;
5) adopt display interpretation is carried out to described detection photo, or adopt image processing software obtains digital camera resolution to be checked, distort and find a view visual field rate information.
Wherein in an embodiment, after the step of described light stability 25-35 minute, if use first or reuse after device dismounting, also has the step of adjustment test section surface illuminance, concrete operations are: adjustment fluorescent lamp light exit direction, utilize illuminance meter read test district each region brightness value, make the unevenness of test section surface illuminance be less than ± 10%.
Described detection method, only comprise the step of adjustment light source when using first or when reusing after device dismounting, compared with universal method, the step that test card, adjustment lighting environment and adjustment camera are arranged is changed before eliminating shooting, decrease shooting number of times when multiple parameters is detected simultaneously, avoid the uncertainty that repeatedly debugging is introduced for test result.
Two of technical problem to be solved by this invention is to provide a kind of digital camera image quality comprehensive detection device integrating test card and luminous environment.
Described digital camera image quality comprehensive detection device, comprises lamp box and test card, and described lamp box is the rectangular structure of one end open, and described test card is fixed on the backboard central authorities of described lamp box;
Described test card comprises test section and scale district, and described scale district is around described test section, and described test section is rectangle, and the center of described test section is provided with double frequency annulus;
Described test section central authorities and corner place are equipped with the wedge shape resolution test line of horizontal direction and vertical direction, and the wedge shape resolution test line of described horizontal direction and the wedge shape resolution test line of vertical direction are combined into cross;
Described test section diagonal, distortion test cross is indicated respectively apart from 0.1y, 0.5y, 0.8y, 0.9y place, center, described test section, the live part of described distortion test cross is right-angled intersection center, and wherein, y represents the half of described test section catercorner length;
Described test section has the first edge, the second edge and the 3rd edge, described first edge and described second sides aligned parallel, and described 3rd edge is adjacent with described second edge with described first edge;
Described first edge is provided with frequency conversion square wave and the test circle of the horizontal direction of 100LW/PH ~ 1000LW/PH, on the neutrality line being centrally located at described test section of described test circle, described test circle is between described frequency conversion square wave and described double frequency annulus, and described test round belt has right-angled intersection and X to intersect;
Described second edge is provided with horizontal direction low dip square-wave pulse;
Described 3rd edge is provided with vertical direction frequency conversion square wave and the vertical direction low dip square-wave pulse of 100LW/PH ~ 1000LW/PH;
Described scale district comprises the extended line part of the cornerwise extended line part in described test section and four limit neutrality lines.
Wherein in an embodiment, described test section is provided with image compression observation area, and described image compression observation area is positioned at above described vertical direction low dip square-wave pulse, and described image compression observation area is made up of gridiron pattern and horizontal stroke, vertical, slanted bar line.
Wherein in an embodiment, described first edge is 3:4 with the length ratio at described 3rd edge, and the length at described first edge is 972 millimeters, and the length at described 3rd edge is 1296 millimeters.
Wherein in an embodiment, described test card is also provided with boundary alignment district, and one end, described boundary alignment district is positioned at described test section, and the other end is positioned at described scale district, and the length of described test card is 1750 millimeters, and width is 1300 millimeters.
Wherein in an embodiment, described lamp box inwall is coated with low layer of reflective material.
Wherein in an embodiment, described lamp box opening direction wall is equipped with fluorescent lighting fixture, and described fluorescent lighting fixture comprises fluorescent lamp and lampshade, and described fluorescent lighting fixture and described lamp box are rotationally connected.
Wherein in an embodiment, be provided with leg bottom described lamp box, bottom described leg, be provided with roller.
Wherein in an embodiment, the height of described leg is 600 millimeters, and the length of described backboard is 2400 millimeters, and width is 1800 millimeters; The thickness of described lamp box is 600 millimeters.
In above-mentioned digital camera image quality comprehensive detection device, test card is used for photographic subjects figure, and lamp box is used for providing lighting environment for target figure, and test section is used for Measurement Resolution and distortion, and scale district is used for measurement and finds a view visual field rate.Wherein, double frequency annulus is used for focusing, and described test section central authorities and the horizontal direction at corner place and the wedge shape resolution test line of vertical direction, be respectively used to the level, the vertical resolution that read digital camera central authorities and corner." ten " word central authorities of diagonal are distortion test point.The frequency conversion square wave of the 100LW/PH ~ 1000LW/PH at the first edge is for measuring the limiting resolution of vertical direction.The low dip square-wave pulse at the second edge is for measuring vertical false signal ratio.The frequency conversion square wave of the 100LW/PH ~ 1000LW/PH at the 3rd edge and low dip square-wave pulse are respectively used to limiting resolution and the horizontal false signal ratio of measuring horizontal direction.It is non-linear that test circle is used for checkout scanning.The length of test section and width are set to 1296 millimeters and 972 millimeters respectively, make test section and digital camera lens object space principal point distance be 30 times of camera lens equivalent focal length, to meet in GB " GB/T29298-2012 numeral (code) camera general specification " 5.6.8.2 bar to the requirement of distortion test chart.Support foot hight is set to 600 millimeters, makes focusing double frequency annulus and ground level keep 1500 millimeters, meets the operation height of usual user.For the function perfection taking into account comprehensive detection device embodies, and the volume of device is little as far as possible, and arranging its thickness is 600 millimeters, and the Length x Width of backboard is respectively 2400 millimeters and 1800 millimeters.
In sum, digital camera image quality comprehensive detection device, and test section comprises resolution, distorts, the check pattern of the multiple parameters such as visual field rate of finding a view for light harvesting environment and test card.The resolution test of described test section meets the requirement for resoliving power test target in " GB/T29298-2012 numeral (code) camera general specification ", " JB/T10362-2010 digital camera ", " GB/T19953-2005 digital camera resolution measurement " and ISO12233 standard.Distortion part of detecting meets the requirement to distortion test chart of GB " GB/T29298-2012 numeral (code) camera general specification " and rower " JB/T10362-2010 digital camera ".
Accompanying drawing explanation
Fig. 1 is the front view of the digital camera image quality comprehensive detection device of an execution mode;
Fig. 2 is the test card front view of the digital camera image quality comprehensive detection device of an execution mode;
Fig. 3 is the test section front view of the digital camera image quality comprehensive detection device of an execution mode
Fig. 4 is the end view of the digital camera image quality comprehensive detection device of an execution mode;
Fig. 5 is the sectional view of the lamp box of the digital camera image quality comprehensive detection device of an execution mode;
Reference numeral:
10, lamp box; 20, test card; 210, test section; 220, scale district; 2100, double frequency annulus; 2102, wedge shape resolution test line; 2104, distort test point; 212, the first edge; 214, the second edge; 216, the 3rd edge; 2120, frequency conversion square wave; 2122, test circle; 2124, square-wave pulse; 2126, image compression observation area; 230, boundary alignment district; 102, low layer of reflective material; 104, fluorescent lighting fixture; 12, leg; 14, roller.
Embodiment
For enabling above-mentioned purpose of the present invention, feature and advantage become apparent more, are described in detail the specific embodiment of the present invention below in conjunction with accompanying drawing.Set forth a lot of detail in the following description so that fully understand the present invention.But the present invention can be much different from alternate manner described here to implement, those skilled in the art can when without prejudice to doing similar improvement when intension of the present invention, therefore the present invention is by the restriction of following public concrete enforcement.
The technical term that the present invention relates to has:
Resolution: the tolerance representing digital camera resolution imagery details ability.
Distortion: because lateral magnification changes with the size of image height or visual field, thus a kind of aberration losing analogy between object and image caused.Distortion does not affect the definition of picture.
False signal: when sample frequency is less than 2 times of the highest frequency of signal of video signal, all sides band of the high frequency waves of sample frequency there will be overlapping noise.
Limiting resolution: the every image height line number recorded the resolution test pattern of regulation, it corresponds to the average modulation degree equal with the reference frequency of regulation and modulation degree percentage thereof.
To find a view visual field rate: view finder specifies each length of side of subject scope observed in region and the actual ratio obtaining the corresponding length of side of picture.
At present, in the industry mainly with the technical requirement of GB " GB/T29298-2012 numeral (code) camera general specification " logarithmic code camera resolution, the visual field rate that distorts and find a view as the foundation passing judgment on digital camera quality, its specific requirement is as follows:
Resolution judgment criteria:
Image sensor area is less than or equal to 200mm
2camera, central vision resolution is not less than: 0.55R
t, peripheral field vision addressability is not less than: 0.45R
t, the wherein zoom camera that is greater than 8 times, peripheral field vision addressability is not less than: 0.4R
t.Valid pixel be greater than 1,500 ten thousand with 1,500 ten thousand calculating.
Image sensor area is greater than 200mm
2camera, central vision resolution is not less than: 0.6R
t, peripheral field vision addressability is not less than: 0.5R
t.
R
tdetermined by formula (1):
R
t=(valid pixel number/image transverse and longitudinal ratio)
1/2(1)
In formula, R
trepresent the theoretical value of vision addressability, the unit every image height of line number (LW/PH) represents.
Distortion judgment criteria:
The relative distortion q at picture diagonal 0.5y and 0.8y place must not exceed ± 5%.For len changeable camera body, if do not carry camera lens at random, then distort and do not do requirement.
Note: y is effective image field radius, equals 1/2nd of picture catercorner length.
To find a view visual field rate criterion:
Visual field of finding a view must not exceed picture captured by reality, the percentage of each length of side in visual field of the finding a view length of side corresponding to the picture captured by reality:
A) the visual field rate of finding a view of paraxial optics view finder should be greater than 70%, and Single-sens reflex camera should be greater than 90%;
When b) being found a view by LCDs, visual field rate of finding a view should be greater than 85%, and its off-centring must not more than 4%.
Following logarithmic code camera image quality comprehensive detection method is described in detail, and concrete steps are:
1) open digital camera image quality comprehensive detection device, open lamphouse light source, treat light stability 25-35 minute;
2) digital camera to be checked is positioned over the dead ahead of described digital camera image quality comprehensive detection device, adjustment measuring distance, make test section just be full of view finder, scale district does not just appear in view finder;
3) double frequency annulus is used to focus;
4) to test section, comprise the wedge shape resolution test line at central authorities and corner place, distortion test cross, horizontal direction frequency conversion square wave, horizontal direction low dip square-wave pulse, vertical direction frequency conversion square wave, vertical direction low dip square-wave pulse, test circle, image compression observation area, take, obtain detecting photo;
5) if first use or dismounting after reuse, fluorescent lamp light exit direction need be adjusted after light stability, utilize illuminance meter read test district each region brightness value, make the unevenness of test section surface illuminance be less than ± 10%.
6) adopt display interpretation is carried out to described detection picture resolution, or adopt image processing software obtains digital camera resolution to be checked, distort and find a view visual field rate information.
Described detection method, only comprise the step of adjustment light source when using first or when reusing after device dismounting, compared with universal method, the step that test card, adjustment lighting environment and adjustment camera are arranged is changed before eliminating shooting, decrease shooting number of times when multiple parameters is detected simultaneously, avoid the uncertainty that repeatedly debugging is introduced for test result.
Following logarithmic code camera image quality comprehensive checkout gear is explained in detail:
As shown in Figure 1-2, the digital camera image quality comprehensive detection device of an execution mode, comprises lamp box 10 and test card 20.Lamp box 10 is the rectangular structure of one end open, and test card 20 is fixed on the backboard central authorities of lamp box 10.The backboard of lamp box 10 is just to the opening of lamp box 10.In the present embodiment, the length of test card 20 is 1750 millimeters, and width is 1300 millimeters; The length of backboard is 2400 millimeters, and width is 1800 millimeters; The thickness of lamp box 10 is 600 millimeters.
Test card 20 comprises test section 210 and scale district 220.Test card 20 is for photographic subjects figure, and wherein, test section 210 is for Measurement Resolution and distortion.Scale district 220 is for measuring visual field rate of finding a view.Scale district 220 is around test section 210.Test section 210 is rectangle.In the present embodiment, scale district 220 is adjacent with test section 210, and the shape in scale district 220 is Q-RING.
As shown in Figure 3, the center of test section 210 is provided with double frequency annulus 2100, for focusing, when filmed image, needs to use double frequency annulus 2100 to carry out correct in defocused filmed image.
Test section 210 central authorities and corner place are equipped with the wedge shape resolution test line 2102 of horizontal direction and vertical direction, are respectively used to the level, the vertical resolution that read digital camera central authorities and corner.The wedge shape resolution test line 2102 of horizontal direction and the wedge shape resolution test line 2102 of vertical direction form cross.The resolution determination methods of digital camera is with reference to " GB/T29298-2012 numeral (code) camera general specification " 5.6.1 article, " JB/T10362-2010 digital camera " 5.6.1 article and " GB/T19953-2005 digital camera resolution measurement ".
Test section 210 diagonal, 0.1y, 0.5y, 0.8y, 0.9y place, center, distance test district 210 indicates cross respectively, and right-angled intersection center is distortion test point 2104.Wherein, y represents the half of test section 210 catercorner length, and the determination methods of distortion is with reference to " GB/T29298-2012 numeral (code) camera general specification " 5.6.8 article, the 5.6.8 article of " JB/T10362-2010 digital camera ".
It is parallel with the second edge 214 that test section 210 has the first edge 214, edge 212, second and the 3rd edge 212, edge 216, first, and the 3rd edge 216 is adjacent with the second edge 214 with the first edge 212.First edge 212 is provided with frequency conversion square wave 2120 and the test circle 2122 of the horizontal direction of 100LW/PH ~ 1000LW/PH.Frequency conversion square wave 2120 is for measuring the limiting resolution of vertical direction.Test circle 2122 is non-linear for checkout scanning.On the neutrality line being centrally located at test section 210 of test circle 2122, test circle 2122 is between frequency conversion square wave 2120 and double frequency annulus 2100, and test circle 2122 intersects with right-angled intersection and X.
Second edge 214 is provided with horizontal direction low dip square-wave pulse 2124.For measuring vertical false signal ratio.
3rd edge 216 is provided with vertical direction frequency conversion square wave 2120 and the vertical direction low dip square-wave pulse 2124 of 100LW/PH ~ 1000LW/PH.3rd edge 216 frequency conversion square wave 2120 is for measuring the limiting resolution of horizontal direction.Square-wave pulse 2124 is for measuring horizontal false signal ratio.
Scale district 220 comprises the extended line part of the cornerwise extended line part in described test section 210 and four limit neutrality lines, for the calculating of visual field rate of finding a view.The extended line part in scale district 220 is equipped with scale, and the starting point of scale is the frame of the test section 210 that extended line is corresponding, and the unit of scale is millimeter.
In the present embodiment, test section 210 is white background black scale, and scale district 220 is black background white scale.
In one embodiment, test section 210 is provided with image compression observation area 2126, and image compression observation area 2126 is positioned at the top of described vertical direction low dip square-wave pulse, and image compression observation area 2126 is made up of gridiron pattern and horizontal stroke, vertical, slanted bar line.
In one embodiment, test card 20 is also provided with boundary alignment district 230, and one end, boundary alignment district 230 is positioned at test section 210, and the other end is positioned at scale district 220.Boundary alignment district 230 is for localizing objects border and instruction centre position.In the present embodiment, boundary alignment district 230 is located at the intersection in test section 210 and scale district 220, and black and white wedge shape is respectively one group, and black wedge shape is positioned at test section 210, and white wedge shape is positioned at scale district 220.When taking, test section 210 is full of view finder, and ensure the just complete appearance of black wedge shape, white wedge shape does not just occur simultaneously.
In one embodiment, the length at the first edge 212 and the 3rd edge 216 is than being 3:4.In the present embodiment, the length at the first edge 212 is 972 millimeters, and the length at the 3rd edge 216 is 1296 millimeters.The size design at the first edge 212 and the 3rd edge 216 makes test card 20 and camera lens owner put 30 times that distance is camera lens equivalent focal length, meets the requirement of GB " GB/T29298-2012 numeral (code) camera general specification " to distortion test chart.
In one embodiment, lamp box 10 inwall is coated with low layer of reflective material 102.The light be mapped on inwall can all absorb by low layer of reflective material 102, avoids reverberation to affect shooting.In the present embodiment, low layer of reflective material 102 is black material.
In one embodiment, lamp box 10 opening direction wall is equipped with fluorescent lighting fixture 104, and fluorescent lighting fixture 104 and lamp box are rotationally connected.
In the present embodiment, the angle between fluorescent lighting fixture 104 and lamp box 10 can regulate between 0-90 °, thus make the exit direction of light be 0-90 ° adjustable.Fluorescent lighting fixture 104 comprises fluorescent lamp and lampshade two parts, and lampshade can avoid lighting source directly to enter digital camera lens.By adjusting the irradiating angle of fluorescent lamp, can make test card 20 surface illuminance unevenness be less than ± 10%.In the present embodiment, the inside circumference of lamp box 10 is equipped with the fluorescent lamp that colour temperature is 5500K respectively.The quantity of the fluorescent lamp on the inwall of every face both can be one, also can be two or many.
As shown in Figure 4 and Figure 5, in one embodiment, bottom lamp box 10, be provided with leg 12, bottom leg 12, be provided with roller 14.Roller 14 is set, the movement of image detection device can be facilitated.In the present embodiment, the height of leg 12 is 600 millimeters.
Above-mentioned digital camera image quality comprehensive detection device, because test card 20 is fixed in lamp box 10, the luminous environment of each shooting being consistent, except using first and reusing after dismounting, taking the lighting environment that can reach standard-required without the need to adjusting light source at every turn.Test section 210 integrates definition, distorts, several functions such as visual field rate of finding a view, and once shooting just can obtain the relevant information of more than two parameters, saves time and resource.And test section 210 resolution test meets the requirement for resoliving power test target in " GB/T29298-2012 numeral (code) camera general specification ", " JB/T10362-2010 digital camera ", " GB/T digital camera resolution measurement " and ISO12233 standard.Distortion part of detecting meets the requirement to distortion test chart of GB " GB/T29298-2012 numeral (code) camera general specification " and rower " JB/T10362-2010 digital camera ".
The above embodiment only have expressed several execution mode 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 range of patent of the present invention should be as the criterion with claims.
Claims (10)
1. a digital camera images quality determining method, it is characterized in that, digital camera image quality comprehensive detection device is used to detect, this digital camera image quality comprehensive detection device comprises lamp box and test card, described lamp box is the rectangular structure of one end open, and described test card is fixed on the backboard central authorities of described lamp box;
Described test card comprises test section and scale district, and described scale district is around described test section, and described test section is rectangle, and the center of described test section is provided with double frequency annulus;
Described test section central authorities and corner place are equipped with the wedge shape resolution test line of horizontal direction and vertical direction, and the wedge shape resolution test line of described horizontal direction and the wedge shape resolution test line of vertical direction are combined into cross;
Described test section diagonal, indicate distortion test cross respectively apart from 0.1y, 0.5y, 0.8y, 0.9y place, center, described test section, wherein, y represents the half of described test section catercorner length, and the live part of described distortion test is right-angled intersection center;
Described test section has the first edge, the second edge and the 3rd edge, described first edge and described second sides aligned parallel, and described 3rd edge is adjacent with described second edge with described first edge;
Described first edge is provided with frequency conversion square wave and the test circle of 100LW/PH ~ 1000LW/PH horizontal direction, on the neutrality line being centrally located at described test section of described test circle, described test circle is between described frequency conversion square wave and described double frequency annulus, and described test round belt has right-angled intersection and X to intersect;
Described second edge is provided with horizontal direction low dip square-wave pulse;
Described 3rd edge is provided with vertical direction frequency conversion square wave and the vertical direction low dip square-wave pulse of 100LW/PH ~ 1000LW/PH;
Described scale district comprises the extended line part of the cornerwise extended line part in described test section and four limit neutrality lines;
Described digital camera images quality determining method comprises the following steps:
1) open digital camera image quality comprehensive detection device, treat light stability 25-35 minute;
2) digital camera to be checked is positioned over the dead ahead of described digital camera image quality comprehensive detection device, adjustment measuring distance, make test section just be full of view finder, scale district does not just appear in view finder;
3) double frequency annulus is used to focus;
4) to test section, comprise the wedge shape resolution test line at central authorities and corner place, distortion test cross, horizontal direction frequency conversion square wave, horizontal direction low dip square-wave pulse, vertical direction frequency conversion square wave, vertical direction low dip square-wave pulse, test circle, image compression observation area, take, obtain detecting photo;
5) adopt display interpretation is carried out to described detection photo, or adopt image processing software obtains digital camera resolution to be checked, distort and find a view visual field rate information.
2. digital camera images quality determining method according to claim 1, it is characterized in that, described in treat the step of light stability 25-35 minute after, if first use or device dismounting after reuse, also have the step of adjustment test section surface illuminance, concrete operations are:
Adjustment fluorescent lamp light exit direction, utilizes illuminance meter read test district each region brightness value, make the unevenness of test section surface illuminance be less than ± 10%.
3. a digital camera image quality comprehensive detection device, is characterized in that, comprises lamp box and test card, and described lamp box is the rectangular structure of one end open, and described test card is fixed on the backboard central authorities of described lamp box;
Described test card comprises test section and scale district, and described scale district is around described test section, and described test section is rectangle, and the center of described test section is provided with double frequency annulus;
Described test section central authorities and corner place are equipped with the wedge shape resolution test line of horizontal direction and vertical direction, and the wedge shape resolution test line of described horizontal direction and the wedge shape resolution test line of vertical direction are combined into cross;
Described test section diagonal, indicate distortion test cross respectively apart from 0.1y, 0.5y, 0.8y, 0.9y place, center, described test section, wherein, y represents the half of described test section catercorner length, and the live part of described distortion test is right-angled intersection center;
Described test section has the first edge, the second edge and the 3rd edge, described first edge and described second sides aligned parallel, and described 3rd edge is adjacent with described second edge with described first edge;
Described first edge is provided with frequency conversion square wave and the test circle of 100LW/PH ~ 1000LW/PH horizontal direction, on the neutrality line being centrally located at described test section of described test circle, described test circle is between described frequency conversion square wave and described double frequency annulus, and described test round belt has right-angled intersection and X to intersect;
Described second edge is provided with horizontal direction low dip square-wave pulse;
Described 3rd edge is provided with vertical direction frequency conversion square wave and the vertical direction low dip square-wave pulse of 100LW/PH ~ 1000LW/PH;
Described scale district comprises the extended line part of the cornerwise extended line part in described test section and four limit neutrality lines.
4. digital camera image quality comprehensive detection device according to claim 3, it is characterized in that, described test section is provided with image compression observation area, described image compression observation area is positioned at the top of described vertical direction low dip square-wave pulse, and described image compression observation area is made up of gridiron pattern and horizontal stroke, vertical, slanted bar line.
5. digital camera image quality comprehensive detection device according to claim 3, is characterized in that, described first edge is 3:4 with the length ratio at described 3rd edge, and the length at described first edge is 972 millimeters, and the length at described 3rd edge is 1296 millimeters.
6. digital camera image quality comprehensive detection device according to claim 3, it is characterized in that, described test card is provided with boundary alignment district, one end, described boundary alignment district is positioned at described test section, the other end is positioned at described scale district, the length of described test card is 1750 millimeters, and width is 1300 millimeters.
7. digital camera image quality comprehensive detection device according to claim 3, is characterized in that, described lamp box inwall is coated with the low layer of reflective material of black.
8. digital camera image quality comprehensive detection device according to claim 3, is characterized in that, described lamp box opening direction wall is equipped with fluorescent lighting fixture, and described fluorescent lighting fixture comprises fluorescent lamp and lampshade, and described fluorescent lighting fixture and described lamp box are rotationally connected.
9. digital camera image quality comprehensive detection device according to claim 3, is characterized in that, is provided with leg bottom described lamp box, is provided with roller bottom described leg.
10. digital camera image quality comprehensive detection device according to claim 9, is characterized in that, the height of described leg is 600 millimeters, and the length of described backboard is 2400 millimeters, and width is 1800 millimeters; The thickness of described lamp box is 600 millimeters.
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