CN107402070B - A kind of skin high spectrum image acquisition unit and scaling method - Google Patents
A kind of skin high spectrum image acquisition unit and scaling method Download PDFInfo
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- CN107402070B CN107402070B CN201710407363.0A CN201710407363A CN107402070B CN 107402070 B CN107402070 B CN 107402070B CN 201710407363 A CN201710407363 A CN 201710407363A CN 107402070 B CN107402070 B CN 107402070B
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- 238000001228 spectrum Methods 0.000 title claims abstract description 43
- 238000000034 method Methods 0.000 title claims abstract description 24
- 238000012937 correction Methods 0.000 claims abstract description 18
- 230000003595 spectral effect Effects 0.000 claims abstract description 15
- 238000004458 analytical method Methods 0.000 claims abstract description 11
- 239000013558 reference substance Substances 0.000 claims abstract description 7
- 230000002500 effect on skin Effects 0.000 claims abstract description 4
- 238000003306 harvesting Methods 0.000 claims abstract description 4
- 238000002310 reflectometry Methods 0.000 claims description 19
- 239000011324 bead Substances 0.000 claims description 14
- 229910052721 tungsten Inorganic materials 0.000 claims description 8
- 239000010937 tungsten Substances 0.000 claims description 8
- 238000005259 measurement Methods 0.000 claims description 7
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 claims description 7
- 238000010606 normalization Methods 0.000 claims description 6
- 238000003491 array Methods 0.000 claims description 2
- 238000013461 design Methods 0.000 abstract description 5
- 230000000877 morphologic effect Effects 0.000 abstract description 4
- 238000005286 illumination Methods 0.000 abstract description 2
- 238000004611 spectroscopical analysis Methods 0.000 abstract description 2
- 238000004445 quantitative analysis Methods 0.000 description 8
- 238000010586 diagram Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000001429 visible spectrum Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 238000000295 emission spectrum Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012067 mathematical method Methods 0.000 description 1
- 238000013178 mathematical model Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000007170 pathology Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
- G01J3/28—Investigating the spectrum
- G01J3/2823—Imaging spectrometer
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
- G01J3/02—Details
- G01J3/0256—Compact construction
- G01J3/0259—Monolithic
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
- G01J3/02—Details
- G01J3/10—Arrangements of light sources specially adapted for spectrometry or colorimetry
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
- G01J3/02—Details
- G01J3/10—Arrangements of light sources specially adapted for spectrometry or colorimetry
- G01J2003/102—Plural sources
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
- G01J3/28—Investigating the spectrum
- G01J2003/2866—Markers; Calibrating of scan
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- Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- General Physics & Mathematics (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
- Measuring And Recording Apparatus For Diagnosis (AREA)
Abstract
The present invention relates to skin high spectrum image acquisition process field more particularly to a kind of acquisition units and scaling method of skin high spectrum image.Including power supply, light source assembly, EO-1 hyperion camera, it is optically isolated cover；Described be optically isolated on cover is provided with an acquisition hole, and light source assembly and the setting of EO-1 hyperion camera are optically isolated in cover described；It takes pictures through EO-1 hyperion camera under the irradiation of the light source assembly by acquisition hole and obtains skin high spectrum image in dermal harvest region；The power supply unit connection light source assembly is powered for it；It further include having reference substance component；Realize correction of the skin spectrum image to acquisition in planar dimensions and spectral Dimensions.The present invention improves the accuracy of system by noise-reducing design；The consistency that ensure that the acquisition spectroscopic data in acquisition plane, every time between acquisition and distinct device, solves consistency problem.And solve acquisition hole and determine area (30mmx25mm) interior uniform illumination, so that system is provided with morphological analysis ability.
Description
Technical field
The present invention relates to skin high spectrum image acquisition process field more particularly to a kind of acquisitions of skin high spectrum image
Unit and scaling method.
Background technique
" skin spectrum prediction " model proposes its virtual skin spectrum of combination by several material composition different content
Mathematical method.Hereby model can render the visual effect of skin, and herein, we term it positive relationships.And " skin
Skin EO-1 hyperion quantitative analysis " is then the reverse process of " skin spectrum prediction ", i.e., calculates skin by the measure spectrum of application on human skin
Biological component content.Obviously, reverse process is the iteration optimization problem of positive relationship, needs to solve the essence being applicable in scene
Quasi- modeling and flood tide computing technique.For quantitative analysis class medical instrument, key index is the accuracy and speed calculated, and can
Reach the requirement of clinical application.
Hyper-spectral image technique differentiated in a manner of noninvasive, non-contacting skin biological component message context have it is only
Special advantage.
Skin high-spectrum seems based on collected under visible light (400-700nm), spacing light path system design condition.
What is got by EO-1 hyperion equipment is a data cube, not only has the image information of certain area, and in spectral Dimensions
On be unfolded, as a result can not only obtain the spectroscopic data of each point on image, the image of any one spectral coverage can also be obtained
Information.Since spectral resolution has reached nm grades (several nm), it can sufficiently, meticulously reflect the spy of its biological component
Sign presents the characteristic of " jljl difference is not composed, and jljl is centainly with spectrum ", has substance and " refer on the full spectral coverage of visible light
The effectiveness of line ", and the nuance of similar target can be distinguished, it can be used as the Research foundation of quantitative analysis.Compared to mostly light
Spectrum, it has the simulation accuracy of full spectral coverage, eliminates " foreign matter is with spectrum " and " same object different images " phenomenon；Compared to single-point spectrum,
It has morphological analysis ability, avoids single-point specificity and operate the strong point for requiring harshness to acquisition, for spectrum number
Possibility is provided according to more efficiently analysis processing is carried out.However, since the different performance of target optical spectrum and combination can be with
It is converted into different features, needs to establish the mathematical model comprising complete biological component, various dimensions, can realize all-wave
Section emulation, fine fitting.
Light source used by visible light wave range (400-700) is mostly tungsten lamp class light source under normal circumstances.But tungsten light source exists
The spectrum spoke of 400-500nm range of wavelengths is lower by force, and signal-to-noise ratio is relatively low, leads to the error based on EO-1 hyperion skin quantitative analysis
It is bigger, it is difficult to the basis signal as quantitative analysis.
Hyper-spectral image technique is on the actual application not yet in skin analysis field.Traditional skin analysis is mainly adopted
It is analyzed with tissue morphology pathology method, skin is invasive acquisition, and general collection surface only has several millimeters, is unable to satisfy whole
The needs observed in terms of volume morphing.If collection surface equally only has several millimeters using spectrometer collection mode.High-spectrum
As technology can satisfy the needs of large area analysis, but it is the basis signal of quantitative analysis, needs to solve unified measure and uniformly
Property problem.
Summary of the invention
For the problems in background technique, it is an object of the invention to:
(1) a kind of skin hyper-spectral data gathering unit is provided, adjustable by force by multiple light courcess configuration and LED light source Single wavelength spoke,
The strong balancing technique of full spectral coverage spoke, makes acquisition unit achieve the purpose that noise reduction, to improve skin EO-1 hyperion quantitative analysis system
Accuracy.
(2) a kind of skin hyper-spectral data gathering unit is provided, by light path design, solution homogeneity question be (30mmx25mm's
Collection surface), so that skin EO-1 hyperion quantitative analysis system is provided with morphological analysis ability.
(3) a kind of two-stage standard correction method is provided, solves the consistency problem of system, has unified metering.
To achieve the goals above, technical scheme is as follows:
A kind of skin high spectrum image acquisition unit, including power supply unit, light source assembly, EO-1 hyperion camera, be optically isolated
Cover；
Described be optically isolated on cover is provided with an acquisition hole, and light source assembly and the setting of EO-1 hyperion camera are optically isolated described
In cover；
It takes pictures through EO-1 hyperion camera under the irradiation of the light source assembly by acquisition hole and obtains skin in dermal harvest region
Skin high spectrum image；
The power supply unit connection light source assembly is powered for it；
It is characterized by:
It further include having reference substance component；The reference substance component includes suit blank and gradient reflecting plate, and the suit is white
Plate realizes correction of the skin high spectrum image to acquisition in planar dimensions, and the gradient reflecting plate realizes the skin to acquisition
Correction of the high spectrum image in spectral Dimensions；
The suit blank includes two parts, and a part is square frame, is attached to inside acquisition hole, adopts at random every time
Frame is also collected simultaneously when collecting object；Another part is rectangular blank, is covered on acquisition hole, acquisition target object location
Panel data realizes the correction of analysis plane；
The gradient reflecting plate is 8 pieces of on-gauge plates of different reflectivity, is fitted on the outside of acquisition hole respectively, and acquisition, which measures, adopts
Each point measured value in collection face, realizes the correction of spectral Dimensions.
Further, the light source assembly is configured using multiple light courcess, including tungsten light source and LED light source；The LED light
Light source is LED lamp bead of one group of wave-length coverage between 395-500nm.
Further, the LED light source is arranged one at interval of 5nm wavelength, is made of 12 LED lamp beads, amounts to 4 groups
It is symmetrically arranged setting.
Further, the power supply that the power supply unit is connect with the LED lamp bead of each wavelength is all made of customization power supply, this is fixed
Voltage, the electric current of power supply processed are individually adjusted.
Further, the nominal reflectivity of the gradient reflecting plate be respectively 100%, 80%, 60%, 40%, 20%,
10%, 5%, 2%.
Further, the useful region after the acquisition unit actual acquisition area removal dash area includes three parts:
1) effective blank correcting area, a part of random standard white plate are outside 100mm x 100mm, inner edge
95mm x95mm；
2) effective viewing area is 50mm x 50mm；
3) effective analyzed area is 30mm x 25mm.
A kind of scaling method for the skin high spectrum image acquisition unit, which is characterized in that the method packet
Include following steps:
(1) first order corrects: according to the relativeness between rectangular blank and square frame, to each in analyzed area
Point, each acquisition are carried out to mark, and normalization amendment forms level-one corrected parameter table；
(2) it second-order correction: is corrected by a set of gradient reflecting plate, to the gradient reflecting plate under every piece of different reflectivity
On-gauge plate surveyed, the opening relationships between measured value and standard value forms the relevant actual covering visible light of equipment
Relationship between the reflectivity detected value and variable of full spectral coverage, i.e. Second level amendment parameter list；To every equipment, every time it measures
As a result amendment is normalized, unifies onto the measurement criteria of metrological service.
Further, in the step (1), when normalization is corrected, effective density 170px150p, total 25500 are repaired
On schedule；In step (2), it is divided into 10nm between effective density, amounts to 31 adjusting points.
Further, the nominal reflectivity of the gradient reflecting plate be respectively 100%, 80%, 60%, 40%, 20%,
10%, 5%, 2%.
The beneficial effect of the present invention compared with the existing technology is:
(1) by noise-reducing design, the accuracy of system is improved.Using the LED lamp bead of one group of different wave length to 395-
500nm wave-length coverage carries out light filling, and every interval 5nm takes a LED lamp bead, and one group is made of 12 LED lamp beads, uses 4 groups altogether, from
And the spoke of 390-500 range of wavelengths in visible spectrum is drawn high by force；
Meanwhile customize voltage, current adjustment power supply for the LED lamp bead of each wavelength, can to each wavelength LED lamp bead voltage and
Electric current is individually adjusted, and the spoke of entire visible spectrum is strong overall balanced, that is, is suitable for data processing, is in turn ensured higher noise
Than.
(2) by two-stage standard correction, it ensure that the acquisition light in acquisition plane, between each acquisition and distinct device
The consistency of modal data, it is unified to calibrate, solve consistency problem.
(3) it by light path design, solves acquisition hole and determines area (30mmx25mm) interior uniform illumination, have system
There is morphological analysis ability.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of acquisition unit of the invention；
Fig. 2 is multiple light courcess configuration schematic diagram of the invention；
Fig. 3 is the noise reduction comparison diagram of acquisition unit of the present invention；
Fig. 4 is the second level calibration correction map of scaling method of the present invention.
In figure, 1- light source assembly, 2- EO-1 hyperion camera, 3- is optically isolated cover, and 4- acquires hole, 5- tungsten light source, 6-LED lamp
Light source.
In Fig. 3, horizontal axis is represented wavelength (unit nm), and the longitudinal axis is that opposite spoke is strong (no unit)；B line segment represents tungsten lamp transmitting light
Spectrum, A line segment represent the combined light source emission spectrum of tungsten lamp and LED light.
In Fig. 4, horizontal axis is actual measurement reflectivity, and the longitudinal axis is standard emission rate；It is anti-that line segment 1 represents not calibrated measurement-calibration
Rate relation curve is penetrated, line segment 2 represents measurement-calibration reflectivity corresponding relationship curve after calibration.
Specific embodiment
With reference to the accompanying drawings and detailed description, detailed elaboration is made to specific embodiments of the present invention.These tools
Body embodiment is only not supposed to be a limitation to the present invention for narration or implementation principle, and protection scope of the present invention is still with power
Subject to benefit requires, including obvious changes or variations etc. made on this basis.
As shown in Figure 1, 2, a kind of skin high spectrum image acquisition unit, including power supply unit, light source assembly 1, EO-1 hyperion
Camera 2 is optically isolated cover 3；Cover is optically isolated with cavity structure, is provided with an acquisition hole 4, shape is not construed as limiting.Light
Source component and EO-1 hyperion camera are mounted on described be optically isolated in cover.Power supply unit connection light source assembly is powered for it.
When practical operation, dermal harvest region is by acquisition hole, under the irradiation of the light source assembly 1, through EO-1 hyperion phase
Machine, which is taken pictures, obtains skin high spectrum image.
The invention also includes have reference substance component.The reference substance component includes suit blank and gradient reflecting plate, the set
It fills blank and realizes correction of the skin spectrum image to acquisition in planar dimensions, the gradient reflecting plate realizes the skin to acquisition
Correction of the skin spectrum picture in spectral Dimensions.Wherein, suit blank includes two parts, and a part is square frame, at random
It is attached to inside acquisition hole, frame is also collected simultaneously when acquiring object every time；Another part is rectangular blank, is covered in and adopts
Collect on hole, acquire the panel data of target object location, realizes the correction of analysis plane.Gradient reflecting plate is the 8 of different reflectivity
Block on-gauge plate is fitted in respectively on the outside of acquisition hole, and acquisition measures each point measured value in collection surface, realizes the school of spectral Dimensions
Just.
In the present invention, the nominal reflectivity of 8 block gradient reflecting plates is respectively 100%, 80%, 60%, 40%, 20%,
10%, 5%, 2%.Numerical value is set relative to other, which is arranged so that measurement is more accurate.
Light source assembly of the invention is configured using multiple light courcess, including tungsten light source and LED light source；Wherein LED light source
For LED lamp bead of one group of wave-length coverage between 395-500nm.LED light source is arranged one at interval of 5nm wavelength, by 12
LED lamp bead composition amounts to 4 groups of symmetric arrays settings.The power supply that power supply unit is connect with the LED lamp bead of each wavelength is all made of fixed
Power supply processed, voltage, the electric current of the customization power supply are individually adjusted.From figure 3, it can be seen that from 400 nanometers to 550 nanometer, light source
Intensity have the signal-to-noise ratio for being obviously improved, improving significantly.
Useful region in the present invention after acquisition unit actual acquisition area removal dash area includes three parts:
1) effective blank correcting area, a part of random standard white plate are outside 100mm x 100mm, inner edge
95mm x95mm；
2) effective viewing area is 50mm x 50mm；
3) effective analyzed area is 30mm x 25mm.
A kind of scaling method for skin high spectrum image acquisition unit of the present invention, which is characterized in that the method packet
Include following steps:
(1) first order corrects: according to the relativeness between rectangular blank and frame blank, to each in analyzed area
Point, each acquisition are carried out to mark, and normalization amendment forms level-one corrected parameter table；
(2) second-order correction: being corrected by a set of gradient reflecting plate, to every piece of different gradient reflectivity Gradient reflection
The on-gauge plate of plate is surveyed, the opening relationships between measured value and standard value, and it is visible to form the relevant actual covering of equipment
Relationship between the reflectivity detected value and variable of the full spectral coverage of light, i.e. Second level amendment parameter list；To every equipment, each measurement
Result be normalized amendment, it is unified in the measurement criteria of metrological service.Wherein, in the step (1), normalization amendment
When, effective density 170px150p amounts to 25500 adjusting points；In step (2), it is divided into 10nm between effective density, amounts to 31
A adjusting point.The nominal reflectivity of gradient reflecting plate is respectively 100%, 80%, 60%, 40%, 20%, 10%, 5%, 2%.
Figure 4, it is seen that accurately calibration reflectivity can be obtained in the reflectivity of measurement after calibration.
Claims (9)
1. a kind of skin high spectrum image acquisition unit, including power supply unit, light source assembly, EO-1 hyperion camera, it is optically isolated cover；
Described be optically isolated on cover is provided with an acquisition hole, and light source assembly and EO-1 hyperion camera, which are arranged, is optically isolated cover described
It is interior；
It takes pictures through EO-1 hyperion camera under the irradiation of the light source assembly by acquisition hole and obtains skin height in dermal harvest region
Spectrum picture；
The power supply unit connection light source assembly is powered for it；
It is characterized by:
It further include having reference substance component；The reference substance component includes suit blank and gradient reflecting plate, and the suit blank is real
The now correction to the skin high spectrum image of acquisition in planar dimensions, the gradient reflecting plate realize the skin bloom to acquisition
Correction of the spectrogram picture in spectral Dimensions；
The suit blank includes two parts, and a part is square frame, is attached to inside acquisition hole at random, acquires mesh every time
Frame is also collected simultaneously when marking object；Another part is rectangular blank, is covered on acquisition hole, acquires the plane of target object location
Data realize the correction of analysis plane；
The gradient reflecting plate is 8 pieces of on-gauge plates of different reflectivity, is fitted on the outside of acquisition hole respectively, acquisition measures collection surface
Interior each point measured value, realizes the correction of spectral Dimensions.
2. a kind of skin high spectrum image acquisition unit according to claim 1, it is characterised in that:
The light source assembly is configured using multiple light courcess, including tungsten light source and LED light source；The LED light source is one group of wave
LED lamp bead of the long range between 395-500nm.
3. according to a kind of skin high spectrum image acquisition unit as claimed in claim 2, it is characterised in that: the LED light source is every
It is spaced 5nm wavelength and is arranged one, be made of 12 LED lamp beads, amount to 4 groups of symmetric arrays settings.
4. a kind of skin high spectrum image acquisition unit according to claim 2, it is characterised in that:
The power supply that the power supply unit is connect with the LED lamp bead of each wavelength is all made of customization power supply, the voltage of the customization power supply,
Electric current is individually adjusted.
5. a kind of skin high spectrum image acquisition unit according to claim 1, it is characterised in that: the gradient reflecting plate
Nominal reflectivity be respectively 100%, 80%, 60%, 40%, 20%, 10%, 5%, 2%.
6. a kind of skin high spectrum image acquisition unit according to claim 1, it is characterised in that:
Useful region after the acquisition unit actual acquisition area removal dash area includes three parts:
1) effective blank correcting area, a part of random standard white plate are outside 100mm x 100mm, inner edge 95mm
x95mm；
2) effective viewing area is 50mm x 50mm；
3) effective analyzed area is 30mm x 25mm.
7. a kind of scaling method for skin high spectrum image acquisition unit described in claim 1, which is characterized in that described
Method includes the following steps:
(1) first order corrects: according to the relativeness between rectangular blank and square frame, in analyzed area each point,
Each acquisition is carried out to mark, and normalization amendment forms level-one corrected parameter table；
(2) it second-order correction: is corrected by a set of gradient reflecting plate, to the mark of the gradient reflecting plate under every piece of different reflectivity
Quasi- plate is surveyed, the opening relationships between measured value and standard value, is formed the relevant actual covering visible light of equipment and is composed entirely
Relationship between the reflectivity detected value and variable of section, i.e. Second level amendment parameter list；To every equipment, every time the result measured
Amendment is normalized, unifies onto the measurement criteria of metrological service.
8. a kind of scaling method for skin high spectrum image acquisition unit as claimed in claim 7, it is characterised in that: described
In step (1), when normalization is corrected, effective density 170px150p amounts to 25500 adjusting points；In step (2), correct close
It is divided into 10nm between degree, amounts to 31 adjusting points.
9. a kind of scaling method for skin high spectrum image acquisition unit as claimed in claim 7, it is characterised in that:
The nominal reflectivity of the gradient reflecting plate is respectively 100%, 80%, 60%, 40%, 20%, 10%, 5%, 2%.
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| CN108451501A (en) * | 2018-02-01 | 2018-08-28 | 福建师范大学 | A kind of nevus flammeus color and area appraisal procedure based on pixel analysis |
| CN112417934B (en) * | 2019-08-23 | 2024-05-14 | 华为技术有限公司 | Image detection method and related equipment |
| CN116019425B (en) * | 2023-03-27 | 2023-05-23 | 皑高森德医疗器械(北京)有限责任公司 | Digital skin model based on hyperspectral image and application thereof |
| CN116012484A (en) * | 2023-03-27 | 2023-04-25 | 皑高森德医疗器械(北京)有限责任公司 | Skin white spot basin-shaped presentation method based on volume content of melanin |
| CN116012379B (en) * | 2023-03-27 | 2023-09-08 | 皑高森德医疗器械(北京)有限责任公司 | White spot grading method based on melanin volume content distribution form |
| CN117405605B (en) * | 2023-12-15 | 2024-03-05 | 浙江大学 | Correction system and method for eliminating non-uniform light field distribution in hyperspectral image acquisition |
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| CN1249444A (en) * | 1998-09-28 | 2000-04-05 | 三菱电机株式会社 | Method for testing spectral sensitivity characteristics of camera device, and camera data constituting method |
| CN102435309A (en) * | 2011-09-20 | 2012-05-02 | 北京农业信息技术研究中心 | Agricultural field imaging high-spectrometer field reflectivity calibration method and system |
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| JPS60192229A (en) * | 1984-03-14 | 1985-09-30 | Hitachi Ltd | Multi-wavelength simultaneous photometry photometer |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1249444A (en) * | 1998-09-28 | 2000-04-05 | 三菱电机株式会社 | Method for testing spectral sensitivity characteristics of camera device, and camera data constituting method |
| CN102435309A (en) * | 2011-09-20 | 2012-05-02 | 北京农业信息技术研究中心 | Agricultural field imaging high-spectrometer field reflectivity calibration method and system |
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