CN108989789A - A kind of camera imaging quality real-time estimating method - Google Patents
A kind of camera imaging quality real-time estimating method Download PDFInfo
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N17/00—Diagnosis, testing or measuring for television systems or their details
- H04N17/002—Diagnosis, testing or measuring for television systems or their details for television cameras
Abstract
This patent discloses a kind of camera imaging quality real-time estimating method, the device that the method uses includes: cabinet；Optical projection system, the optical projection system include lens assembly and projection screen, and the lens assembly includes eyepiece, light filling hole and projecting mirror；Display system；Human eye vision peep hole.By above-mentioned apparatus, Real-Time Evaluation is carried out for projected image and camera imaging image.Through the above technical solutions, can be used for the Real-Time Evaluation of camera or imaging system images quality, one implements visual information quality evaluating method in which can be convenient, and to the quality score for participating in evaluation image, evaluates imaging system images quality；The two can be implemented the digital picture that imaging equipment obtains and compare in real time with captured scene, and adjustment imaging system constantly tends to close to reality scene when imaging device can be according to the fructufy of on-the-spot testing.
Description
Technical field
This patent belongs to imaging device fields, in particular to a kind of camera imaging quality real-time estimating method.
Background technique
Imaging device is widely used in the prior art, such as digital camera, DV, camera etc..
Theoretically, imaging device record information perfect condition be being capable of faithful reappearance to photographed scene information.Picture quality is commented
For valence, people is the final receiving terminal to image information perception, and how final picture quality is or is analyzed, is identified by people
And understanding.
At present in the evaluation of imaging device image quality, image is obtained and image quality evaluation is independent two processes,
Then the first digital picture by imaging system shooting for evaluation establishes evaluation system and completes evaluation, then feeds back to imaging system.
The implementation of evaluation is usually to invite by the Digital Image Display after shooting in the display system Jing Guo color management
For a part of experienced image quality evaluation expert as observer, expert is directed to the effect of display image according to certain scoring
Rule marking, or a part of non-experienced image observer of tissue, the preference according to oneself is to the effect for showing image
Marking, it is then for statistical analysis to obatained score, obtain the average mark or weighted average point of visual quality of images.It is this
Evaluation is independently carried out after being detached from former photographed scene, due to the chance not with the comparison of former photographed scene, if strictly according to the facts
It reduces photographed scene or what degree is reached to the duplication of photographed scene, be difficult to compare.The obtained evaluation result is strong
Strong experience or preference dependent on estimator, if evaluating the imaging of imaging device from the informativeness restored to photographed scene
If quality, best evaluation method is to compare the image of imaging device record in real time with photographed scene, directly evaluation imaging
The effect of equipment reduction reality scene.
The existing dark place that profession detection or evaluation are mainly built for the detection of imaging device picture quality in the market,
Wall, ceiling, floor of dark place etc. should all be neutral grays, other articles are also grey or achromaticity.Such dark place
It is higher to fit up specification requirement, and this dark place is larger to space requirement, due to the immovable characteristic in house, to evaluation
It makes troubles.
The shortcomings that prior art, mainly there is at following 5 points: first, and evaluation procedure is carried out in dark place, builds dark
Room occupied ground is larger, and dark place finishing is with a higher standard, and dark place environment parameter control difficulty is big；Second, picture appraisal process and figure
As acquisition process be it is separated, cannot compare in real time；Third, evaluation result are not based on perception of the estimator to former photographed scene
And understanding, it is strongly depend on the experience or preference of observer；4th, the evaluation of imaging system images effect is confined to secretly
The acquisition of scene set in room cannot complete the real time contrast of outdoor natural environment field data acquisition；5th, imaging device at
Picture Objective Quality Assessment and adjustment are mutually independent, and imaging system images quality-controlling parameters adjustment target is difficult to realize and live
The consistency of perceived effect.
Summary of the invention
This patent is based on the demand of the prior art and proposes, the technical problems to be solved by the patent is to provide
One kind being used for camera imaging quality evaluating method, in order to be able to have and contrastively carry out convenient and standard to camera imaging quality
True evaluation.
In order to solve the above-mentioned technical problem, the technical solution of this patent offer includes:
A kind of camera imaging quality real-time estimating method, the method using image Real-Time Evaluation device to camera at
Image quality amount is compared in real time；Described image Real-Time Evaluation device includes: cabinet, and the cabinet is when carrying out evaluation of imaging quality
One closed environment is provided, extraneous veiling glare is completely cut off；Optical projection system, the optical projection system include lens assembly and projection screen,
The lens assembly includes eyepiece, light filling hole and projecting mirror；The eyepiece is opposite with target object, acquires the image of target object
And send the image to projecting mirror；The projecting mirror projects the image of the target object on projection screen；The benefit
Unthreaded hole is arranged between the eyepiece and the projecting mirror to the optical path light filling inside the lens assembly；The projection screen is set
It sets in the cabinet, the image of the target object of the lens assembly projection is presented；Display system, the display system and institute
It states camera to be connected, shows the image of the camera shooting；The display system includes display screen, and the display screen is set
It sets in the cabinet；Human eye vision peep hole, the eye-observation hole are arranged on the cabinet, with the projection screen and
The display screen is opposite.The step of real-time comparison, is as follows: the cabinet of described device a) being placed in image scene just
Front is fixed the camera module that camera module to be evaluated is fixed on present apparatus configuration on bracket, by camera module
Controller connect with display system, in order to show the image of acquisition；B) according to test item requirement, adjustment camera is fixed
The coordinate of six dimensions of bracket, guarantees picture plane of the optical axis perpendicular to photographed scene of camera, and adjusts object distance and obtain
Corresponding imaging size；C) optical projection system is opened, is incident upon photographed scene content on the intracorporal projection screen of case, adjusts eyepiece
And projection lens, it obtains and the big sharp images such as display system；D) illuminance and colour temperature of photographed scene are measured；E) case is measured
The illumination and colour temperature of internal projection screen surface, and compared with the illumination of photographed scene and color temperature value, the size in light filling hole is adjusted,
The illuminance difference of the illuminance and photographed scene that make projection screen surface controls within 100Lux；F) in cabinet, correction is aobvious
Display screen curtain white point coordinates tristimulus values is matched with projection screen surface measurement colour temperature tristimulus coordinates, and adjustment display screen intensity makes
Luminance difference between the illumination of display system screen control within 100Lux；G) fine tuning optical projection system and display screen
Brightness makes the picture size of the picture size for showing screen and projection screen match, and makes the illumination and throwing that show screen surface
The illumination difference of shadow screen surfaces is allowing in difference range；H) focusing photographed scene obtains Digital Image Display in display system, and
By the image observed on the display screen curtain and the projection screen, the image quality of the camera is evaluated.
Preferably, the method also includes carrying out real time correction, the real time correction to the display system and camera
It can complete, can be used in front of the Real-Time Evaluation in the dark place of laboratory, one when can also be used in the Real-Time Evaluation
Image is adjusted after wheel evaluation and continues to evaluate；The real time correction includes into lower step: 1) shooting test
Each test item in scene；2) difference for comparing image and projection screen image that display system is shown, determines adjustment side
To；3) the objective quality parameter of current shooting project is recorded and analyzed；4) join adjustment direction, adjust the driving ginseng of imaging system
Number, the image quality index for reflecting the parameter tend to be consistent with adjustment direction；5) repeatedly, the tune of comprehensive every survey project
Perfect square is to adjusting the driving parameter of imaging system, make to obtain image and level off to projected image.
Preferably, illumination is lower than 5Lux in the case where no light in the cabinet；Color is neutral gray in cabinet；Institute
Cabinet wall is stated for dumb light and without mirror-reflection and glare phenomenon.
Preferably, the lens assembly further includes reflecting mirror, and the reflective mirror is a plane mirror, and main function is by mesh
The incident light of mirror carries out 90 ° of steerings, is reflected to projecting mirror.
Preferably, the projecting mirror is a lens combination, and adjustable focal length realizes the figure of projection on the projection screen
As size and clarity adjust.
Preferably, light filling hole is provided on rear side of eyepiece, is capable of the size of adjusting hole, to control light-inletting quantity；Work as optical projection system
When the image of projection is darker, increase aperture light-inletting quantity, it is opposite to reduce aperture light-inletting quantity.
Preferably, which matches binocular vision camera lens, which is one group of lens group, can adjust visual observation distance,
1-25 meters of adjusting range.
Preferably, idler wheel can be set on the pedestal of the cabinet.
Preferably, also comprising the fixed bracket of camera module: the bracket is capable of fixing camera module, and can be
The position of the three dimension adjustment cameras in space；The fixed bracket of camera module is arranged on the front side outer surface of the cabinet,
Eyepiece close to the optical projection system is arranged.
Preferably, the fixed bracket of the camera module is adjusted, it is vertically flat with imaging to can be realized camera module optical axis
Face；The eyepiece of the position of camera module and optical projection system in same level, the distance of the two optical center 5-10mm it
Between；The control circuit board of camera module is connected with display system, passes through institute by the digital picture that the camera obtains
The display screen of display is stated to show.
Preferably, it is also configured with photometry sensor in the device box, can measure the light on display system " display screen " surface
Illumination also can measure the illumination on optical projection system " projection screen " surface, and brightness or the tune of display screen are adjusted by parameter feedback
The light-inletting quantity for reorganizing and bringing up unthreaded hole to full strength makes the two surface Relative light intensity degree error within 10%.
This patent through the above technical solutions, can be used for the Real-Time Evaluation of camera or imaging system images quality,
One implements visual information quality evaluating method in which can be convenient, and to the quality score for participating in evaluation image, evaluates imaging system
Image quality；The two can be implemented the digital picture that imaging equipment obtains and compare in real time with captured scene, and imaging device can
With according to on-the-spot testing fructufy when adjustment imaging system constantly tend to close to reality scene.
Detailed description of the invention
Fig. 1 is a kind of structure of the device for camera imaging quality Real-Time Evaluation in this patent specific embodiment
Figure.
Fig. 2 is a kind of internal junction of the device for camera imaging quality Real-Time Evaluation in this patent specific embodiment
Composition.
Specific embodiment
Specific implementation of the patent mode is described in detail with reference to the accompanying drawing, it should be pointed out that the specific reality
Applying mode is only the citing to this patent optimal technical scheme, can not be interpreted as the limitation to the scope of this patent.
In this embodiment, as shown in Figure 1, providing a kind of dress for camera imaging quality Real-Time Evaluation
It sets.Described device includes cabinet 1, and a closed environment is provided when the cabinet works, and completely cuts off extraneous veiling glare, and cabinet is interior in nothing
Illumination is lower than 5Lux in the case where illumination, and color is neutral gray in cabinet, and the cabinet wall is for dumb light and without mirror-reflection
With glare phenomenon.
A closing can be formed in a small range by design cabinet and can avoid ambient light unplanned dry as far as possible
The space disturbed provides a suitable environment to the evaluation of image quality.The dumb light of cabinet wall is to avoid subsequent projection etc.
The interference of the reflective generation of side wall when luminescence imaging due to cabinet.
As illustrated in fig. 1, it is preferred that idler wheel 2 can be set on the pedestal of the cabinet, the idler wheel be can be commonly
Wheel either universal wheel, can neatly move the cabinet in this way to suitable position, it is convenient with other equipment progress
Docking and transport and the mobile cabinet.Great flexibility is brought to using.
As shown in Fig. 2, the side on the bottom surface of the cabinet is provided with display device 3, the display device is for showing
Show the imaging of camera, the display device can be the display equipment of the prior art, it may for example comprise but it is not limited to display packet
Include the display device of the either other display screens of light-emitting diode display.The display device 3 can adjust display screen according to setting
Brightness, contrast, white point, screen resolution, refreshing frequency and can connect screen colour examining equipment (such as X-Rite series point
Light photometer etc.) complete screen colour correction etc..
Other side is provided with projection screen 4 on the bottom surface of the cabinet, and the projection screen is for receiving optics throwing
The projection of shadow system is formed on image, and projection screen is an image information receiving screen, receives the projection light of projecting mirror,
The screen is diffuse reflector, no glare, and screen is white colour, and the color of the projection screen can be with " white point " of the display device
Carry out chromaticity match, can guarantee as much as possible in this way the display system and optical projection system be in approximate optical environment it
Under, consequently facilitating the image of image and projection systems project that display system is shown is compared.The further projection
The surface of screen and display system show that the surface of screen is in same level, thus are avoided that appearance because showing different fall
Difference causes the difference of visual effect.And the projection screen is arranged as close to the display screen, in this way, the two is formed
Image can be positioned as close to, in order to observe and compare.
The optical projection system further include: lens assembly, the structure of the lens assembly is as shown in Figure 1, the lens assembly packet
Include eyepiece 5, light filling hole 6, reflective mirror 7, the composition of projecting mirror 8；Eyepiece is a lens combination, and adjustable focal length, effect is to obtain
Take the image information with camera or imaging system same field angle；Light filling hole is provided on rear side of eyepiece, can adjust the big of hole
It is small, to control light-inletting quantity, when the image of projection system projects is darker, it is possible to increase aperture light-inletting quantity, it is opposite to reduce aperture entering light
Amount；Reflective mirror is a plane mirror, and main function is that the incident light of eyepiece is carried out to 90 ° of steerings, is reflected to projecting mirror；Projecting mirror
It is a lens combination, adjustable focal length realizes the size and clarity adjustment of projection image, and reflected light projects are existed
On projection screen.The lens assembly is similar to camera lens either telescope, periscope, by reality for target object
Or original copy is found a view, and is then projected the light from target object on the projection screen via the lens subassembly, institute
The loss for stating light quantity in refraction and reflection process of the light filling hole for compensating lens assembly, is made as much as possible by supplementing light
The image of the projection system projects and the light of target object are consistent.The eyepiece is arranged on the cabinet, preferably status
It is arranged in the front side of the cabinet, and close to the camera, the angle for keeping the eyepiece and the camera to find a view as far as possible
Degree is identical with other conditions, in order to obtain theoretically image as identical as possible.
The device also includes the fixed bracket 9 of camera module: the bracket can fixing camera mould group 10, and can be
6 dimension of space adjust camera position, i.e., three, space axis (XYZ) directional trim and three, space angle (elevation angle, the angle of depression,
Rotation) directional trim.The structure of the camera bracket can be realized using camera bracket in the prior art, in this patent
In be not developed in details, as long as any can be fixed thereon the camera, and adjust the camera position
Structure.By adjusting the fixed bracket of the camera module, realize camera module optical axis vertically and imaging plane；Camera shooting
The position of head mould group and the eye lens unit of " optical projection system " are in same level, and the distance of optical center is between 5-10mm；It takes the photograph
As the control circuit board of head mould group is connected with display system, the digital picture of acquisition can by the display screen of the display come
Display.Preferably, described as shown in Figure 1, the fixed bracket of the camera module is arranged on the front side outer surface of the cabinet
The eyepiece of optical projection system is also disposed on the front side outer surface of the cabinet, and the two is as close as possible to setting.In this way by the cabinet
Being directed at the object that is taken and is projected can be evaluated and be tested.
The device further includes human eye vision peep hole 11, and the eye-observation hole is preferably provided at the top of the cabinet,
It is opposite with the projection screen and the display screen.The peep hole matches binocular vision camera lens, which is one group of lens group, can
Adjustment visual observation distance, 1-25 meters of adjusting range.As shown in Figure 1, the eye-observation hole may include left eye peep hole and
Right eye peep hole, only have in this way left eye and right eye place be there is light to exchange with the external world, and rest part be it is closed, can
To avoid ambient light influence intracorporal for case.In addition, the range of the binocular vision camera lens is set as left eye and right eye all
The image of the upper presentation of the display system and/or the optical projection system can be observed simultaneously.It can be carried out in this way by eyes
Image viewing, closer in actual observation matching status.When left eye and right eye can only see wherein piece image simultaneously, institute
Binocular vision camera lens is stated other than adjusting viewing distance, the region of visual field can also be adjusted, in order to be carried out for two images
It compares.
It is also configured with photometry sensor in the device box, can measure the illuminance on display system " display screen " surface,
The illumination that can measure optical projection system " projection screen " surface adjusts brightness or the adjustment light filling hole of display screen by parameter feedback
Light-inletting quantity, both make surface Relative light intensity degree error within 10%.
In this embodiment, it other than above system, additionally provides a kind of real using above-mentioned apparatus progress image
When the method that compares, in the use process of the present apparatus, the method and step compared in real time is as follows:
A) present apparatus cabinet is placed in the front of image scene, camera module to be evaluated is fixed on the present apparatus
On the fixed bracket of the camera module of configuration, the controller of camera module is connect with display system, is obtained in order to show
Image；
B) according to test item requirement, such as resolving power test project, the color rendition test item in IEEE Std 1858
And noise test item etc., adjust the coordinate of six dimensions of camera fixing support, guarantee the optical axis of camera perpendicular to
The picture plane of photographed scene, and adjust object distance and obtain corresponding imaging size；
C) optical projection system is opened, is incident upon photographed scene content on the intracorporal projection screen of case, adjusts eyepiece and projection
Camera lens, obtain with display system etc. it is big, clearly image；
D) illuminance and colour temperature for measuring photographed scene, such as use illumination photometry apparatus measures；
E) illumination and colour temperature of projection screen surface in cabinet are measured, and compared with the illumination of photographed scene and color temperature value,
The illuminance difference of the size for adjusting light filling hole, the illuminance and photographed scene that make projection screen surface controls within 100Lux；
F) in cabinet, color management is carried out to display system, by means of spectrophotometer and color management software to aobvious
Show that system carries out colour correction, correction display system white point coordinate tristimulus values and projection screen surface measurement colour temperature tristimulus values are sat
Mark matching, adjustment display system screen intensity make to exist with the illumination of display system screen and the control of the illumination difference of projection screen surface
Within 100Lux；
G) brightness of fine tuning optical projection system and display screen makes to show the picture size of screen and the image ruler of projection screen
It is very little to match, allowing the illumination for showing screen surface and the illumination difference of projection screen surface in difference range；In this step,
Finely tune the optical projection system and the display system screen brightness can further precisely adjust two systems image it is aobvious
Show size and display brightness.As much as possible two systems can be close in this way.
H) focus photographed scene, obtain Digital Image Display in display system, and by observe the display screen curtain and
Image on the projection screen evaluates the image quality of the camera.
The evaluation can use Paired Comparisons, including but not limited to International Telecommunication Union's communication standard tissue
(ITU) testing standard released compares display system and shows difference between image and projection system projects image, using comparing
Test object is divided into 7 class to the score evaluated by grading system: it is excessively poor, poor, somewhat poor, both it is identical, a little
It is good, fine, very good；For the score value processing of evaluation, picture quality can be indicated using mean scores, while can also calculate
The confidence interval of mean scores.
In this embodiment, device is stated in use to carry out outside comparison in real time, it can also be to the display system
Real time correction is carried out, the real time correction can be completed in the dark place of laboratory, it can be used in front of the Real-Time Evaluation,
Image is adjusted after one wheel evaluation when can be used in the Real-Time Evaluation and continues to evaluate.The real-time comparison
What it is different from real time contrast is a little to need to complete to reflect that the parameter of the objective image quality of imaging system calculates.It is needed before evaluation
Image quality analysis software, such as imatest are installed in the display system.Implementation process is described as follows:
1) experiment executor shoots test test scene, as 12233 identification resolution chart of ISO, 14524 noise of ISO are surveyed
The test item etc. that examination card and 1858 testing standard of IEEE are recommended；
2) experiment executor compares the difference of image and projection screen image that display system is shown, determines adjustment direction,
Such as resolving power test project, it can determine whether that clarity is relatively high low；
3) the objective quality parameter of current shooting project is analyzed, and is recorded；
4) referring to the judgement of perception, the driving parameter of imaging system is adjusted, the image quality index for reflecting the parameter becomes
In consistent with perceived direction；
5) repeatedly, the perceived direction of comprehensive every survey project, adjusts the driving parameter of imaging system, makes to obtain image
Preferably level off to the projected image of the present apparatus.
The important performance characteristic of device in present embodiment is to realize what camera module scene obtained
Image compares in real time with floor content.The present apparatus or the standard testing for comparing objective quality analysis in real time in dark place
Card, or compare natural scene imaging effect in real time outdoors.Can only be compared in dark place in the prior art display effect and
Actual photographed object is different, and this patent can will be shot by projecting to actual reference object on the screen of optical projection system
The picture of display and the neighbouring comparison of picture in kind, it is free from the influence of the external environment, greatly improve flexibility.It can not only use
In the detection of dark place, it can be also used for the evaluation and test such as open air, there is greater flexibility and the scope of application.
Removable detection environment is realized using the comparison and bearing calibration of the device, it is possible to provide standardized observation ring
Border.Shooting image can be achieved to be compared in real time with the reality scene being based on.Executable visual information quality evaluation, not only may be used
It is right in contrast with realization static object, the evaluation in video image quality can also be applied alone, only say from this point on and existing evaluation
System has similar place.This device can be used in dark place, cooperate the reflectance chart or test dress of Objective image quality detection
It sets, realizes that shooting image is compared in real time with imaging scene, adjusted in real time, the direction for adjusting imaging system drive parameter is clear,
Constantly reach unanimity with visual perception direction, such as adjustment direction of the adjustment direction of clear articulation index, color rendition index,
The adjustment direction of noise index, the adjustment direction of dynamic range index, the adjustment direction for the index that distorts etc..This device can also be used in
The evaluation of imaging quality of outdoor natural scene, this is that existing evaluation of programme is irrealizable；Used evaluation of programme is in image
It is carried out after acquisition, evaluation result and the scene of live shooting are substantially unrelated；Using this device can realize field imaging result with
Field scene projection is compared in pairs in real time, and evaluation result is based on field scene；This is the maximum innovative point of this patent, and
This patent designs in place of the most application value of device.
It is above only the preferred technical solution of this patent, it is all that this patent is carried out under this patent inventional idea
Modification, replacement and deletion should all bring within the protection scope of this patent.
Claims (2)
1. a kind of camera imaging quality real-time estimating method, which is characterized in that the method uses image Real-Time Evaluation device
Camera imaging quality is compared in real time；
Described image Real-Time Evaluation device includes: cabinet, the cabinet provided when carrying out evaluation of imaging quality one it is closed
Environment completely cuts off extraneous veiling glare；Optical projection system, the optical projection system include lens assembly and projection screen, the lens assembly packet
Include eyepiece, light filling hole and projecting mirror；The eyepiece is opposite with target object, acquires the image of target object and transmits the image
To projecting mirror；The projecting mirror projects the image of the target object on projection screen；The light filling hole is arranged described
To the optical path light filling inside the lens assembly between eyepiece and the projecting mirror；The projection screen is arranged in the cabinet
It is interior, the image of the target object of the lens assembly projection is presented；Display system, the display system and the camera phase
Even, the image of the camera shooting is shown；The display system includes display screen, and the display screen is arranged in the case
In vivo；Human eye vision peep hole, the eye-observation hole is arranged on the cabinet, with the projection screen and the display screen
Curtain is opposite.
The step of real-time comparison, is as follows:
A) cabinet of described device is placed in the front of image scene, camera module to be evaluated is fixed on the present apparatus
On the fixed bracket of the camera module of configuration, the controller of camera module is connect with display system, is obtained in order to show
Image；
B) according to test item requirement, the coordinate of six dimensions of camera fixing support is adjusted, guarantees that the optical axis of camera hangs down
Directly in the picture plane of photographed scene, and adjusts object distance and obtain corresponding imaging size；
C) optical projection system is opened, is incident upon photographed scene content on the intracorporal projection screen of case, adjusts eyepiece and projection lens,
It obtains and the big sharp images such as display system；
D) illuminance and colour temperature of photographed scene are measured；
E) illumination and colour temperature of projection screen surface in cabinet are measured, and compared with the illumination of photographed scene and color temperature value, adjustment
The illuminance difference of the size in light filling hole, the illuminance and photographed scene that make projection screen surface controls within 100Lux；
F) in cabinet, correction display screen white point coordinates tristimulus values and projection screen surface measure colour temperature tristimulus coordinates
Match, adjustment display screen intensity is allowed to the control of the luminance difference between the illumination of display system screen within 100Lux；
G) brightness of fine tuning optical projection system and display screen makes the picture size and the picture size phase of projection screen that show screen
Matching is allowing the illumination for showing screen surface and the illumination difference of projection screen surface in difference range；
H) it focuses photographed scene, obtains Digital Image Display in display system, and by observing the display screen curtain and described
Image on projection screen evaluates the image quality of the camera.
2. a kind of camera imaging quality real-time estimating method according to claim 1, which is characterized in that the method is also
Including carrying out real time correction to the display system and camera, the real time correction can be completed in the dark place of laboratory,
It can be used in front of the Real-Time Evaluation, image is adjusted after one wheel evaluation when can also be used in the Real-Time Evaluation
It is whole to continue to evaluate；The real-time calibration includes into lower step:
1) each test item in test scene is shot；
2) difference for comparing image and projection screen image that display system is shown, determines adjustment direction；
3) the objective quality parameter of current shooting project is recorded and analyzed；
4) join adjustment direction, adjust the driving parameter of imaging system, the image quality index for reflecting the parameter tends to and adjusts
Direction is consistent；
5) repeatedly, the adjustment direction of comprehensive every survey project, adjusts the driving parameter of imaging system, makes to obtain image approach
In projected image.
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| CN110149506A (en) * | 2019-06-28 | 2019-08-20 | 浙江水晶光电科技股份有限公司 | Image projection detection device and image projection detection method |
| CN113923444A (en) * | 2021-10-08 | 2022-01-11 | 广州辰达精密光电科技有限公司 | Zoom lens quality evaluation method and device |
| CN113920145A (en) * | 2021-12-08 | 2022-01-11 | 天津大学 | Projection image quality evaluation and calculation method for projection system |
| CN116993738A (en) * | 2023-09-27 | 2023-11-03 | 广东紫慧旭光科技有限公司 | Video quality evaluation method and system based on deep learning |
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| CN116993738A (en) * | 2023-09-27 | 2023-11-03 | 广东紫慧旭光科技有限公司 | Video quality evaluation method and system based on deep learning |
| CN116993738B (en) * | 2023-09-27 | 2024-01-02 | 广东紫慧旭光科技有限公司 | Video quality evaluation method and system based on deep learning |
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