CN109510948A - Exposure adjustment method, device, computer equipment and storage medium - Google Patents
Exposure adjustment method, device, computer equipment and storage medium Download PDFInfo
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- CN109510948A CN109510948A CN201811160167.9A CN201811160167A CN109510948A CN 109510948 A CN109510948 A CN 109510948A CN 201811160167 A CN201811160167 A CN 201811160167A CN 109510948 A CN109510948 A CN 109510948A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/70—Circuitry for compensating brightness variation in the scene
- H04N23/74—Circuitry for compensating brightness variation in the scene by influencing the scene brightness using illuminating means
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/24—Measuring arrangements characterised by the use of optical techniques for measuring contours or curvatures
- G01B11/25—Measuring arrangements characterised by the use of optical techniques for measuring contours or curvatures by projecting a pattern, e.g. one or more lines, moiré fringes on the object
- G01B11/2518—Projection by scanning of the object
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/70—Circuitry for compensating brightness variation in the scene
- H04N23/71—Circuitry for evaluating the brightness variation
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Abstract
This application involves a kind of exposure adjustment method, device, computer equipment and storage mediums.The described method includes: obtaining plan scan image；According to the plan scan image, the three-dimensional information of each pixel is calculated；According to the transformation relation and standard light field of the plan scan image, the three-dimensional information of each pixel, camera coordinates system and projector's coordinate system, exposure compensating parameter is obtained；Adjustment is exposed according to the exposure compensating parameter.Exposure parameter can be adjusted in real time, the signal-to-noise ratio of collected picture is improved according to the surface color of the object of Current Scan and the variation of material.It is further to promote the quality for rebuilding 3-D image.
Description
Technical field
This application involves 3-D scanning technical fields, more particularly to a kind of exposure adjustment method, device, computer equipment
And storage medium.
Background technique
3-D scanning, which refers to, integrates light, mechanical, electrical and computer technology new and high technology, is mainly used for acquiring and analyze
The geometrical construction and appearance data of object or environment, and collected data are subjected to three-dimensional reconstruction, obtain scanned object
Three-dimensional digital model.
3-D scanning scheme based on active vision usually requires to project some coding patterns in body surface, passes through camera
Under acquisition one or multiple different perspectivess, by the modulated coding pattern of body surface.Utilize the coding in these patterns
Information finds corresponding points, and then calculates the three-dimensional data of body surface.During the step, color of object surface material
Matter is constantly changing, if camera or the setting of the exposure parameter of projector unreasonable will lead to the collected picture of camera
Signal-to-noise ratio decline, can not correctly resolve encoded information, lead to reconstruction failure.
Summary of the invention
Based on this, it is necessary in view of the above technical problems, provide a kind of exposure that can accurately calculate projector's exposure parameter
Light method of adjustment, device, computer equipment and storage medium.
A kind of exposure adjustment method, which comprises obtain plan scan image；According to the plan scan image,
Calculate the three-dimensional information of each pixel；According to the plan scan image, the three-dimensional information of each pixel, camera coordinates system
With the transformation relation and standard light field of projector coordinate system, exposure compensating parameter is obtained；According to the exposure compensating parameter into
Row exposure adjustment.
In one of the embodiments, before the acquisition plan scan image, further includes: obtain projection code light and marked
Determine the modulated uncalibrated image of part；It obtains and is demarcated after the three-dimensional information of each pixel of uncalibrated image and modulation after the modulation
The gray value of each pixel of image；According to being demarcated after the three-dimensional information of each pixel of uncalibrated image, modulation after the modulation
The gray value of each pixel of image and the transformation relation of camera coordinates system and projector's coordinate system, obtain standard light field.
It is described according to the plan scan image in one of the embodiments, calculate the three-dimensional information of each pixel
It include: the region of interest area image extracted in the plan scan image；According to the region of interest area image, calculate interested
The three-dimensional information of each pixel of area image.
In one of the embodiments, the region of interest area image extracted in the plan scan image include: by
Judgement of the pixel of each pixel preset quantity adjacent with its periphery respectively as current pixel in the plan scan image
Region；Calculate the aromatic entropy in all judgement regions；The aromatic entropy in all judgement regions is compared with aromatic entropy is preset；If sentencing
The aromatic entropy in disconnected region, which is greater than, presets aromatic entropy, then accordingly judges pixel corresponding to region for area-of-interest image pixel.
It is described according to the region of interest area image in one of the embodiments, calculate each picture of region of interest area image
The three-dimensional information of vegetarian refreshments includes: to calculate the pixel three-dimensional information that measurement obtains according to the region of interest area image；To described
Obtained pixel three-dimensional information is measured by interpolation method, obtains the three-dimensional information of each pixel of region of interest area image.
It is described according to the plan scan image, the three-dimensional information of each pixel, camera in one of the embodiments,
The transformation relation and standard light field of coordinate system and projector's coordinate system, obtaining exposure compensating parameter includes: acquisition region of interest
The gray value of each pixel of area image；According to gray value, the region of interest area image of each pixel of region of interest area image
The three-dimensional information and camera coordinates system of each pixel and the transformation relation of projector's coordinate system, it is each to calculate region of interest area image
The gray value of pixel and the corresponding relationship of each pixel of projector；According to the gray value of each pixel of region of interest area image with
And the corresponding relationship of the gray value of each pixel of region of interest area image and each pixel of projector, region of interest area image is each
The gray value of pixel is compared with the gray value of standard light field respective pixel point, obtains exposure compensating parameter.
The gray value by each pixel of region of interest area image is corresponding to standard light field in one of the embodiments,
The gray value of pixel is compared, if obtaining the ash that exposure compensating parameter includes: each pixel of region of interest area image
Angle value is less than the gray value of standard light field respective pixel point, then exposure compensating parameter is to increase the projection of projector's respective pixel point
Brightness；If the gray value of each pixel of region of interest area image is greater than the gray value of standard light field respective pixel point, expose
Light compensating parameter is the projection brightness for reducing projector's respective pixel point.
A kind of exposure adjusting device, described device includes: acquisition module, for obtaining plan scan image；Three-dimensional information
Computing module, for calculating the three-dimensional information of each pixel according to the plan scan image；Exposure compensating parameter calculates mould
Block, for the change according to the plan scan image, the three-dimensional information of each pixel, camera coordinates system and projector's coordinate system
Relationship and standard light field are changed, exposure compensating parameter is obtained；Module is adjusted, for being exposed according to the exposure compensating parameter
Adjustment.
A kind of computer equipment, including memory and processor, the memory are stored with computer program, the processing
The step of device realizes any of the above-described kind of the method when executing the computer program.
A kind of computer readable storage medium is stored thereon with computer program, and the computer program is by processor
The step of method described in realizing any of the above-described kind when execution.
Above-mentioned exposure adjustment method, device, computer equipment and storage medium, first acquisition plan scan image, calculate
The three-dimensional information of each pixel in plan scan image, according to the three of pixel each in plan scan image, flat image
Information, the transformation relation and standard light field of camera coordinates system and projector's coordinate system are tieed up, exposure compensating parameter, last root are obtained
Adjustment is exposed according to the exposure compensating parameter being calculated.By obtaining current scan image, and by current scanning figure
As being compared with the light field of current environment, exposure compensating parameter is obtained, so as to adjust conditions of exposure.It can be according to Current Scan
Object surface color and material variation, adjust exposure parameter in real time, improve the signal-to-noise ratio of collected picture.Into one
The quality of 3-D image is rebuild in the promotion of step.
Detailed description of the invention
Fig. 1 is the flow diagram of exposure adjustment method in one embodiment；
Fig. 2 is the flow diagram that the method for standard light field is obtained in one embodiment；
Fig. 3 is the flow diagram that the method for region of interest area image is extracted in one embodiment；
Fig. 4 is the flow diagram that the method for exposure parameter is obtained in one embodiment；
Fig. 5 is the structural block diagram of exposure adjusting device in one embodiment；
Fig. 6 is the internal structure chart of computer equipment in one embodiment.
Appended drawing reference: module 100, three-dimensional information computing module 200, exposure compensating parameter calculating module 300, adjustment are obtained
Module 400.
Specific embodiment
It is with reference to the accompanying drawings and embodiments, right in order to which the objects, technical solutions and advantages of the application are more clearly understood
The application is further elaborated.It should be appreciated that specific embodiment described herein is only used to explain the application, not
For limiting the application.
3-D scanning technology is a kind of advanced full-automatic high precision stereoscan technology, by measuring space object surface
The D coordinates value of point, obtains the point cloud information of body surface, and be converted into the threedimensional model that computer can be handled directly, again
Referred to as " outdoor scene reproduction technology ".Subject image to be scanned is obtained in spatial digitizer, when object in the subject image to be scanned of acquisition
When body color contrast is excessively high or the reverse curvature discrimination of material is excessively high, a set of exposure parameter can not meet all simultaneously
Scanning area can thus make the subject image to be scanned obtained only have partial data to be reconstructed, remaining region can not be rebuild.Example
Such as: if white area accounts for major part in subject image to be scanned, the tendency that system judges overexposure always increases, from
And the exposure of camera and projection is turned down, this will lead to the lesser black region of accounting in this panel region and can not be reconstructed always.It is existing
Having technology is usually to adjust camera exposure to realize, is not relative to object to be scanned in hand-held spatial digitizer in scanning
What offset moved, in this process if camera exposure overlong time will lead to acquired image and generate smear, make to scan object
Body is geometrically distorted.Therefore the embodiment of the invention provides a kind of projection by adjusting projector's respective pixel point is bright
Degree reaches the method for adjustment respective pixel point depth of exposure, adjusts exposure parameter in real time according to subject image to be scanned, further
Promotion rebuild 3-D image quality.
In one embodiment, as shown in Figure 1, providing a kind of exposure adjustment method, comprising the following steps:
Step S102 obtains plan scan image.
Specifically, before hand-held spatial digitizer scans object acquisition plan scan image to be scanned, camera is first obtained
Coordinate conversion relation and standard light field between coordinate and projector.Wherein, it is every to refer to that light passes through in each direction for light field
The light quantity of one point.Light quantity refers to the summation for the light that light source is issued within certain period.When get camera coordinates and projection
After coordinate conversion relation and standard light field between machine, user holds spatial digitizer, obtains from different angles respectively
Take the flat image of object to be scanned.Wherein, holding spatial digitizer tool, there are two the binocular measuring systems of camera.Binocular measurement
System calculates the depth information of object to be scanned using Binocular Vision Principle, specifically, with two identical cameras to same
The never same position imaging of the object to be scanned of angle, obtains the image pair that two cameras are got, by the picture in two images
Vegetarian refreshments is matched, and the depth information of object to be scanned to hand held scanner is finally calculated using triangulation method.
Step S104 calculates the three-dimensional information of each pixel according to plan scan image.
Specifically, the plan scan image got according to hand-held spatial digitizer calculates the three-dimensional letter of each pixel
Breath.Wherein, three-dimensional information is the three-dimensional coordinate information of each point, including X axis coordinate, Y axis coordinate and Z axis coordinate.Z axis coordinate
For the distance of respective pixel point to hand held scanner.More specifically, in order to reduce data volume, accelerate arithmetic speed, extract first
Region of interest area image in plan scan image, image of interest are the image of object to be scanned, and remaining image is Background
Picture, that is, first eliminate the background in plan scan image.Further according to region of interest area image, it is each to calculate region of interest area image
The three-dimensional information of pixel.Ignore the three-dimensional information of background area, can significantly reduce data volume.More specifically, it calculates
The three-dimensional information of each pixel of region of interest area image calculates the pixel that measurement obtains first according to region of interest area image
Three-dimensional information passes through interpolation method to the pixel three-dimensional information that measurement obtains, obtains the three of each pixel of region of interest area image
Tie up information.Due under unsuitable exposure, data can have certain missing, and three-dimensional information and with area-of-interest figure
As be not it is one-to-one, so needing to go out one and region of interest area image one-to-one three using available data interpolation
Tie up information.Preferably, the mode that the present embodiment can use fitting obtains the three-dimensional information of each pixel of region of interest area image.
Common fitting scheme has cubic surface fitting or gridFit interpolation method etc..
Step S106, according to plan scan image, the three-dimensional information of each pixel, camera coordinates system and projector's coordinate
The transformation relation and standard light field of system, obtain exposure compensating parameter.
Specifically, the gray value for obtaining each pixel of plan scan image, according to each of obtained plan scan image
The gray value of pixel, the three-dimensional information of each pixel of plan scan image and camera coordinates system and projector's coordinate system
The corresponding relationship between each pixel of gray value and projector of each pixel of plan scan image is calculated in transformation relation；
According to the gray value of the gray value of each pixel of plan scan image and each pixel of plan scan image and each picture of projector
Corresponding relationship between vegetarian refreshments, by the gray value of the gray value of each pixel of plan scan image and standard light field respective pixel point
It is compared, obtains each pixel exposure compensating parameter of plan scan image.Finally exposed according to each pixel of plan scan image
Light compensating parameter is exposed adjustment.In order to reduce data volume in above-mentioned steps, the background in plan scan image is carried out
It eliminates, has obtained region of interest area image.According to image of interest, each pixel exposure compensating of region of interest area image is obtained
Parameter specifically: obtain the gray value of each pixel of region of interest area image；According to the ash of each pixel of region of interest area image
The transformation relation of angle value, the three-dimensional information of each pixel of region of interest area image and camera coordinates system and projector's coordinate system,
Calculate the gray value of each pixel of region of interest area image and the corresponding relationship of each pixel of projector；According to area-of-interest figure
It, will as the gray value of each pixel of gray value and area-of-interest of each pixel and the corresponding relationship of each pixel of projector
The gray value of each pixel of region of interest area image is compared with the gray value of standard light field respective pixel point, is obtained interested
The exposure compensating parameter of each pixel of area image.
Step S108 is exposed adjustment according to exposure compensating parameter.
Specifically, according to each pixel exposure compensating parameter of obtained plan scan image, projector's respective pixel is adjusted
The projection brightness of point, and then accurately adjust the exposure of projection.In order to reduce data volume in above-mentioned steps, to plan scan image
In background eliminated, the exposure compensating parameter of each pixel of region of interest area image is obtained, according to region of interest area image
The projection brightness of exposure compensating parameter adjustment projector's respective pixel point of each pixel, and then accurately adjust the exposure of projection.
Above-mentioned exposure adjustment method obtains plan scan image first, each pixel in Calculation Plane scan image
Three-dimensional information is sat according to the three-dimensional information of pixel each in plan scan image, flat image, camera coordinates system and projector
The transformation relation and standard light field for marking system, obtain exposure compensating parameter, it is last according to the exposure compensating parameter being calculated into
Row exposure adjustment.By obtaining current scan image, and current scan image is compared with the light field of current environment,
Exposure compensating parameter is obtained, so as to adjust conditions of exposure.The exposure of each pixel on each frame projection image can accurately be adjusted
Light.The gray scale in each region is fallen in reasonable range on the original image for obtaining camera, guarantees the weight under complex environment
It builds to obtain the guaranteed monolithic data of quality, carries out scanning complete stream freely.
In one embodiment, as shown in Fig. 2, providing a kind of method of acquisition standard light field, comprising the following steps:
Step S202 obtains projection code light and is calibrated the modulated uncalibrated image of part.
Specifically, calibration element be one with reference to made of material with the plate of reference color, wherein can be with reference to material
For any material, only need that plate can be made.Reference color can be random color, that is, plate can be any
Plate made of color material.By projector to calibration element projection code light, encoded light is formed by image and is referenced material
The manufactured plate modulation with reference color, obtains modulated uncalibrated image.
Step S204, obtain modulation after each pixel of uncalibrated image three-dimensional information and modulation after uncalibrated image it is each
The gray value of pixel.
Specifically, holding spatial digitizer tool, there are two the binocular measuring systems of camera.Binocular measuring system utilizes binocular
Visual theory calculates the three-dimensional information of object to be scanned.The image data and biocular systems collected by left camera resolves
To three-dimensional information.According to the gray value of the available each pixel of uncalibrated image after the modulation got.
Step S206, according to each picture of uncalibrated image after the three-dimensional information of each pixel of uncalibrated image after modulation, modulation
The gray value and camera coordinates system of vegetarian refreshments and the transformation relation of projector's coordinate system, obtain standard light field.
Specifically, calibration element is repeatedly placed in multiple depth planes of hand-held spatial digitizer, obtains different depth phase
Uncalibrated image after should modulating calculates the three-dimensional information of each pixel of respective depth and the gray scale of each pixel of respective depth
Value.Current environment is obtained according to the gray value of the three-dimensional information of each pixel of each depth and each pixel of each depth
Under the changing rule of direction and energy in space of each pixel light in space.It is finally each according to each depth
The three-dimensional information of pixel, the gray value of each pixel of each depth, each pixel light direction in space, energy exist
The transformation relation of changing rule and camera coordinates system and projector's coordinate system in space, obtains standard light field.
The method of above-mentioned acquisition standard light field is calibrated the modulated calibration maps of part by the acquisition of real-time different depth
Picture, after being modulated after the three-dimensional information of each pixel of uncalibrated image and modulation each pixel of uncalibrated image gray scale
Value, finally obtains standard light field.According to standard light field, it can accurately determine each pixel exposure compensating parameter, reach more preferable
Compensation effect, it is further to promote the quality for rebuilding 3-D image.
In one embodiment, as shown in figure 3, providing a kind of method for extracting region of interest area image, including it is following
Step:
Step S302, using pixel each in plan scan image respectively the preset quantity adjacent with its periphery pixel as
The judgement region of current pixel.
Specifically, all pixels point in plan scan image is chosen, and will wherein each pixel and own circumference
Pixel in preset range neighborhood, which is used as, judges region.Wherein preset range is modified according to the actual situation.More specifically, will
The pixel of each pixel of plan scan image preset quantity adjacent with periphery respectively is sentenced as the area-of-interest of current pixel
Disconnected region.
Step S304 calculates the aromatic entropy in all judgement regions.
Specifically, aromatic entropy is properly termed as comentropy again, for the amount quantified to information.Calculation Plane scan image
In the aromatic entropy in region is judged corresponding to each pixel.
The aromatic entropy in all judgement regions is compared by step S306 with aromatic entropy is preset.
Specifically, judge the aromatic entropy in region according to corresponding to each pixel being calculated, then by its with it is default
Aromatic entropy compares.To which whether each pixel in Judge plane scan image belongs to area-of-interest.
Step S308 accordingly judges pixel corresponding to region if judging that the aromatic entropy in region is greater than presets aromatic entropy
For area-of-interest image pixel.
Specifically, if judging, the aromatic entropy in region is less than or equal to preset aromatic entropy, accordingly judges picture corresponding to region
Element is background area pixels.By will judge the aromatic entropy in region and pre- corresponding to each pixel in plan scan image
If aromatic entropy is compared, to remove background area, the image of area-of-interest is obtained.
When being scanned using hand-held spatial digitizer, there can be background area in scanning process.So in scanning
It needs to identify background area in the process, background area is avoided to participate in calculating.The side of said extracted region of interest area image
Method judges the aromatic entropy in region by calculating, then compared with aromatic entropy is preset by judging region for the setting of each pixel
Compared with to remove background area.Aromatic entropy is used to judge the value of an area information amount, has projected the region of encoded light due to compiling
The presence of code, there is higher aromatic entropy in its image, therefore will judge that the aromatic entropy in region is greater than and preset corresponding to aromatic entropy
Pixel is as area-of-interest pixel.For example, the pixel of periphery 1, No. 2 pixels, 3 will be chosen centered on No. 5 pixels
Number pixel, No. 4 pixels, No. 6 pixels, No. 7 pixels, No. 8 pixels and No. 9 pixels are as No. 5 pixels
Judge region, calculating currently judges the aromatic entropy in region, and currently will judge that the aromatic entropy in region compares with aromatic entropy is preset
Compared with, when judge the aromatic entropy in region be greater than preset aromatic entropy, then using No. 5 pixels as area-of-interest image pixel；When judging area
The aromatic entropy in domain is less than or equal to preset aromatic entropy, then using No. 5 pixels as background area image pixel.By calculating aromatic entropy, energy
Enough more accurate determination area-of-interests, improve the operation efficiency of exposure adjustment.
In one embodiment, as shown in figure 4, providing a kind of method for obtaining exposure parameter, comprising the following steps:
Step S402 obtains the gray value of each pixel of region of interest area image.
Specifically, region of interest area image is respectively mapped to camera plane and projector's plane.Obtain camera acquisition
The gray value of the region of interest area image pixel arrived.
Step S404, according to the gray value of each pixel of region of interest area image, region of interest area image each pixel
The transformation relation of three-dimensional information and camera coordinates system and projector's coordinate system calculates the ash of each pixel of region of interest area image
The corresponding relationship of angle value and each pixel of projector.
Specifically, the gray value of each pixel of region of interest area image passes through the change of camera coordinates system and projector's coordinate system
Relationship is changed, the gray value of each pixel of region of interest area image and the corresponding relationship of each pixel of projector are obtained.
Step S406, according to the gray value of each pixel of region of interest area image and each pixel of region of interest area image
Gray value and each pixel of projector corresponding relationship, by the gray value of each pixel of region of interest area image and standard light field
The gray value of respective pixel point is compared, and obtains exposure compensating parameter.
Specifically, if the gray value of each pixel of region of interest area image is less than the gray scale of standard light field respective pixel point
Value, then exposure compensating parameter is the projection brightness for increasing projector's respective pixel point；If each pixel of region of interest area image
Gray value is greater than the gray value of standard light field respective pixel point, then exposure compensating parameter is to reduce the throwing of projector's respective pixel point
Shadow brightness.
The method of above-mentioned acquisition exposure parameter is corresponding with standard light field by the gray value of each pixel of region of interest area image
The gray value of pixel is compared, and is adjusted the projection brightness of projector's respective pixel point, is further adjusted each pixel
Conditions of exposure promotes the quality for rebuilding 3-D image.
It should be understood that although each step in the flow chart of Fig. 1-4 is successively shown according to the instruction of arrow,
These steps are not that the inevitable sequence according to arrow instruction successively executes.Unless expressly stating otherwise herein, these steps
Execution there is no stringent sequences to limit, these steps can execute in other order.Moreover, at least one in Fig. 1-4
Part steps may include that perhaps these sub-steps of multiple stages or stage are not necessarily in synchronization to multiple sub-steps
Completion is executed, but can be executed at different times, the execution sequence in these sub-steps or stage is also not necessarily successively
It carries out, but can be at least part of the sub-step or stage of other steps or other steps in turn or alternately
It executes.
In one embodiment, as shown in figure 5, providing a kind of exposure adjusting device, comprising: obtain module 100, three-dimensional
Information computational module 200, exposure compensating parameter calculating module 300 and adjustment module 400, in which:
Module 100 is obtained, for obtaining plan scan image.
Three-dimensional information computing module 200, for calculating the three-dimensional information of each pixel according to plan scan image.
Exposure compensating parameter calculating module 300, for according to plan scan image, the three-dimensional information of each pixel, phase
The transformation relation and standard light field of machine coordinate system and projector's coordinate system, obtain exposure compensating parameter.
Module 400 is adjusted, for being exposed adjustment according to exposure compensating parameter.
A kind of exposure adjusting device further include: standard light field computing module, for obtaining standard light field.
Standard light field computing module includes: uncalibrated image acquiring unit, the first gray value computing unit and standard light field
Computing unit.
Uncalibrated image acquiring unit is calibrated the modulated uncalibrated image of part for obtaining projection code light.
First gray value computing unit, for obtain modulation after each pixel of uncalibrated image three-dimensional information and modulation
The gray value of each pixel of uncalibrated image afterwards.
Standard light field computing unit, for according to being marked after the three-dimensional information of each pixel of uncalibrated image after modulation, modulation
Determine the gray value of each pixel of image and the transformation relation of camera coordinates system and projector's coordinate system, obtains standard light field.
Three-dimensional information computing module further include: area-of-interest image extraction unit and three-dimensional information computing unit.
Area-of-interest image extraction unit, for extracting the region of interest area image in plan scan image.
Three-dimensional information computing unit, for calculating each pixel of region of interest area image according to region of interest area image
Three-dimensional information.
Area-of-interest image extraction unit further include: judge that region obtains subelement, aromatic entropy computation subunit, aromatic
Entropy comparing subunit and area-of-interest image pixel extract subelement.
Judge that region obtains subelement, for pixel each in plan scan image is adjacent with its periphery default respectively
Judgement region of the pixel of quantity as current pixel.
Aromatic entropy computation subunit, for calculating the aromatic entropy in all judgement regions.
Aromatic entropy comparing subunit, for the aromatic entropy in all judgement regions to be compared with aromatic entropy is preset.
Area-of-interest image pixel extracts subelement, if presetting aromatic entropy for judging that the aromatic entropy in region is greater than,
Accordingly judge pixel corresponding to region for area-of-interest image pixel.
Three-dimensional information computing unit further include: three-dimensional information computation subunit and interpolation subelement.
Three-dimensional information computation subunit, for calculating the pixel three-dimensional letter that measurement obtains according to region of interest area image
Breath.
Interpolation subelement, the pixel three-dimensional information for obtaining to measurement obtain area-of-interest figure by interpolation method
As the three-dimensional information of each pixel.
Exposure compensating parameter calculating module further include: the second gray value computing unit, corresponding relationship computing unit and exposure
Light compensation parameter calculation unit.
Second gray value computing unit, for obtaining the gray value of each pixel of region of interest area image.
Corresponding relationship computing unit, for gray value, the area-of-interest figure according to each pixel of region of interest area image
As the three-dimensional information and camera coordinates system of each pixel and the transformation relation of projector's coordinate system, region of interest area image is calculated
The gray value of each pixel and the corresponding relationship of each pixel of projector.
Exposure compensating parameter calculation unit, for according to the gray value of each pixel of region of interest area image and interested
The gray value of each pixel of area image and the corresponding relationship of each pixel of projector, by each pixel of region of interest area image
Gray value is compared with the gray value of standard light field respective pixel point, obtains exposure compensating parameter.
Exposure compensating parameter calculation unit, if the gray value for being also used to each pixel of region of interest area image is less than standard light
The gray value of field respective pixel point, then exposure compensating parameter is the projection brightness for increasing projector's respective pixel point；If interested
The gray value of each pixel of area image is greater than the gray value of standard light field respective pixel point, then exposure compensating parameter is to reduce to throw
The projection brightness of shadow machine respective pixel point.
Specific about exposure adjusting device limits the restriction that may refer to above for exposure adjustment method, herein not
It repeats again.Modules in above-mentioned exposure adjusting device can be realized fully or partially through software, hardware and combinations thereof.On
Stating each module can be embedded in the form of hardware or independently of in the processor in computer equipment, can also store in a software form
In memory in computer equipment, the corresponding operation of the above modules is executed in order to which processor calls.
In one embodiment, a kind of computer equipment is provided, which can be terminal, internal structure
Figure can be as shown in Figure 6.The computer equipment includes processor, the memory, network interface, display connected by system bus
Screen and input unit.Wherein, the processor of the computer equipment is for providing calculating and control ability.The computer equipment is deposited
Reservoir includes non-volatile memory medium, built-in storage.The non-volatile memory medium is stored with operating system and computer journey
Sequence.The built-in storage provides environment for the operation of operating system and computer program in non-volatile memory medium.The calculating
The network interface of machine equipment is used to communicate with external terminal by network connection.When the computer program is executed by processor with
Realize a kind of exposure adjustment method.The display screen of the computer equipment can be liquid crystal display or electric ink display screen,
The input unit of the computer equipment can be the touch layer covered on display screen, be also possible to be arranged on computer equipment shell
Key, trace ball or Trackpad, can also be external keyboard, Trackpad or mouse etc..
It will be understood by those skilled in the art that structure shown in Fig. 6, only part relevant to application scheme is tied
The block diagram of structure does not constitute the restriction for the computer equipment being applied thereon to application scheme, specific computer equipment
It may include perhaps combining certain components or with different component layouts than more or fewer components as shown in the figure.
In one embodiment, a kind of computer equipment, including memory and processor are provided, is stored in memory
Computer program, the processor perform the steps of when executing computer program
Obtain plan scan image.According to plan scan image, the three-dimensional information of each pixel is calculated.It is swept according to plane
The transformation relation and standard light field of tracing picture, the three-dimensional information of each pixel, camera coordinates system and projector's coordinate system, obtain
To exposure compensating parameter.Adjustment is exposed according to exposure compensating parameter.
In one embodiment, it is also performed the steps of when processor executes computer program
It obtains projection code light and is calibrated the modulated uncalibrated image of part.Obtain each pixel of uncalibrated image after modulating
The gray value of each pixel of uncalibrated image after three-dimensional information and modulation.According to the three of each pixel of uncalibrated image after modulation
The transformation of the gray value and camera coordinates system and projector's coordinate system of each pixel of uncalibrated image is closed after dimension information, modulation
System, obtains standard light field.
In one embodiment, it is also performed the steps of when processor executes computer program
Using the pixel of pixel each in the plan scan image preset quantity adjacent with its periphery respectively as current pixel
Judgement region.Calculate the aromatic entropy in all judgement regions.The aromatic entropy in all judgement regions is compared with aromatic entropy is preset
Compared with.If judging that the aromatic entropy in region is greater than presets aromatic entropy, accordingly judge pixel corresponding to region for area-of-interest figure
As pixel.
In one embodiment, it is also performed the steps of when processor executes computer program
Obtain the gray value of each pixel of region of interest area image.According to the gray scale of each pixel of region of interest area image
The transformation relation of value, the three-dimensional information of each pixel of region of interest area image and camera coordinates system and projector's coordinate system, meter
Calculate the gray value of each pixel of region of interest area image and the corresponding relationship of each pixel of projector.According to region of interest area image
The corresponding relationship of the gray value of each pixel and the gray value of each pixel of region of interest area image and each pixel of projector,
The gray value of each pixel of region of interest area image is compared with the gray value of standard light field respective pixel point, is exposed
Compensating parameter.
In one embodiment, a kind of computer readable storage medium is provided, computer program is stored thereon with, is calculated
Machine program performs the steps of when being executed by processor
Obtain plan scan image.According to plan scan image, the three-dimensional information of each pixel is calculated.It is swept according to plane
The transformation relation and standard light field of tracing picture, the three-dimensional information of each pixel, camera coordinates system and projector's coordinate system, obtain
To exposure compensating parameter.Adjustment is exposed according to exposure compensating parameter.
In one embodiment, it is also performed the steps of when computer program is executed by processor
It obtains projection code light and is calibrated the modulated uncalibrated image of part.Obtain each pixel of uncalibrated image after modulating
The gray value of each pixel of uncalibrated image after three-dimensional information and modulation.According to the three of each pixel of uncalibrated image after modulation
The transformation of the gray value and camera coordinates system and projector's coordinate system of each pixel of uncalibrated image is closed after dimension information, modulation
System, obtains standard light field.
In one embodiment, it is also performed the steps of when computer program is executed by processor
Using the pixel of pixel each in the plan scan image preset quantity adjacent with its periphery respectively as current pixel
Judgement region.Calculate the aromatic entropy in all judgement regions.The aromatic entropy in all judgement regions is compared with aromatic entropy is preset
Compared with.If judging that the aromatic entropy in region is greater than presets aromatic entropy, accordingly judge pixel corresponding to region for area-of-interest figure
As pixel.
In one embodiment, it is also performed the steps of when computer program is executed by processor
Obtain the gray value of each pixel of region of interest area image.According to the gray scale of each pixel of region of interest area image
The transformation relation of value, the three-dimensional information of each pixel of region of interest area image and camera coordinates system and projector's coordinate system, meter
Calculate the gray value of each pixel of region of interest area image and the corresponding relationship of each pixel of projector.According to region of interest area image
The corresponding relationship of the gray value of each pixel and the gray value of each pixel of region of interest area image and each pixel of projector,
The gray value of each pixel of region of interest area image is compared with the gray value of standard light field respective pixel point, is exposed
Compensating parameter.
Those of ordinary skill in the art will appreciate that realizing all or part of the process in above-described embodiment method, being can be with
Relevant hardware is instructed to complete by computer program, the computer program can be stored in a non-volatile computer
In read/write memory medium, the computer program is when being executed, it may include such as the process of the embodiment of above-mentioned each method.Wherein,
To any reference of memory, storage, database or other media used in each embodiment provided herein,
Including non-volatile and/or volatile memory.Nonvolatile memory may include read-only memory (ROM), programming ROM
(PROM), electrically programmable ROM (EPROM), electrically erasable ROM (EEPROM) or flash memory.Volatile memory may include
Random access memory (RAM) or external cache.By way of illustration and not limitation, RAM is available in many forms,
Such as static state RAM (SRAM), dynamic ram (DRAM), synchronous dram (SDRAM), double data rate sdram (DDRSDRAM), enhancing
Type SDRAM (ESDRAM), synchronization link (Synchlink) DRAM (SLDRAM), memory bus (Rambus) direct RAM
(RDRAM), direct memory bus dynamic ram (DRDRAM) and memory bus dynamic ram (RDRAM) etc..
Each technical characteristic of above embodiments can be combined arbitrarily, for simplicity of description, not to above-described embodiment
In each technical characteristic it is all possible combination be all described, as long as however, the combination of these technical characteristics be not present lance
Shield all should be considered as described in this specification.
The several embodiments of the application above described embodiment only expresses, the description thereof is more specific and detailed, but simultaneously
It cannot therefore be construed as limiting the scope of the patent.It should be pointed out that coming for those of ordinary skill in the art
It says, without departing from the concept of this application, various modifications and improvements can be made, these belong to the protection of the application
Range.Therefore, the scope of protection shall be subject to the appended claims for the application patent.
Claims (10)
1. a kind of exposure adjustment method, which is characterized in that the described method includes:
Obtain plan scan image；
According to the plan scan image, the three-dimensional information of each pixel is calculated；
According to the plan scan image, the transformation of the three-dimensional information of each pixel, camera coordinates system and projector's coordinate system
Relationship and standard light field, obtain exposure compensating parameter；
Adjustment is exposed according to the exposure compensating parameter.
2. the method according to claim 1, wherein before the acquisition plan scan image, further includes:
It obtains projection code light and is calibrated the modulated uncalibrated image of part；
Obtain each pixel of uncalibrated image after the three-dimensional information of each pixel of uncalibrated image after the modulation and modulation
Gray value；
According to the gray scale of each pixel of uncalibrated image after the three-dimensional information of each pixel of uncalibrated image, modulation after the modulation
The transformation relation of value and camera coordinates system and projector's coordinate system, obtains standard light field.
3. according to the method described in claim 2, calculating each picture it is characterized in that, described according to the plan scan image
The three-dimensional information of vegetarian refreshments includes:
Extract the region of interest area image in the plan scan image；
According to the region of interest area image, the three-dimensional information of each pixel of region of interest area image is calculated.
4. according to the method described in claim 3, it is characterized in that, the region of interest extracted in the plan scan image
Area image includes:
Using the pixel of pixel each in the plan scan image preset quantity adjacent with its periphery respectively as current pixel
Judgement region；
Calculate the aromatic entropy in all judgement regions；
The aromatic entropy in all judgement regions is compared with aromatic entropy is preset；
If judging that the aromatic entropy in region is greater than presets aromatic entropy, accordingly judge pixel corresponding to region for area-of-interest figure
As pixel.
5. according to the method described in claim 3, calculating sense is emerging it is characterized in that, described according to the region of interest area image
The three-dimensional information of interesting each pixel of area image includes:
According to the region of interest area image, the pixel three-dimensional information that measurement obtains is calculated；
To the obtained pixel three-dimensional information that measures by interpolation method, the three-dimensional of each pixel of region of interest area image is obtained
Information.
6. according to the method described in claim 3, it is characterized in that, described according to the plan scan image, each pixel
Three-dimensional information, camera coordinates system and projector's coordinate system transformation relation and standard light field, obtain exposure compensating parameter packet
It includes:
Obtain the gray value of each pixel of region of interest area image；
According to the three-dimensional information of the gray value of each pixel of region of interest area image, each pixel of region of interest area image with
And the transformation relation of camera coordinates system and projector's coordinate system, calculate gray value and the projection of each pixel of region of interest area image
The corresponding relationship of each pixel of machine；
According to the gray value and throwing of the gray value of each pixel of region of interest area image and each pixel of region of interest area image
The corresponding relationship of each pixel of shadow machine, by the gray value of each pixel of region of interest area image and standard light field respective pixel point
Gray value is compared, and obtains exposure compensating parameter.
7. according to the method described in claim 6, it is characterized in that, the gray value by each pixel of region of interest area image
It is compared with the gray value of standard light field respective pixel point, obtaining exposure compensating parameter includes:
If the gray value of each pixel of region of interest area image is less than the gray value of standard light field respective pixel point, expose
Compensating parameter is the projection brightness for increasing projector's respective pixel point；
If the gray value of each pixel of region of interest area image is greater than the gray value of standard light field respective pixel point, expose
Compensating parameter is the projection brightness for reducing projector's respective pixel point.
8. a kind of exposure adjusting device, which is characterized in that described device includes:
Module is obtained, for obtaining plan scan image；
Three-dimensional information computing module, for calculating the three-dimensional information of each pixel according to the plan scan image；
Exposure compensating parameter calculating module, for being sat according to the plan scan image, the three-dimensional information of each pixel, camera
The transformation relation and standard light field of mark system and projector's coordinate system, obtain exposure compensating parameter；
Module is adjusted, for being exposed adjustment according to the exposure compensating parameter.
9. a kind of computer equipment, including memory and processor, the memory are stored with computer program, feature exists
In the step of processor realizes any one of claims 1 to 7 the method when executing the computer program.
10. a kind of computer readable storage medium, is stored thereon with computer program, which is characterized in that the computer program
The step of method described in any one of claims 1 to 7 is realized when being executed by processor.
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