CN110146112A - A kind of two dimension phase sensitivity demodulation method and device - Google Patents
A kind of two dimension phase sensitivity demodulation method and device Download PDFInfo
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- CN110146112A CN110146112A CN201910434994.0A CN201910434994A CN110146112A CN 110146112 A CN110146112 A CN 110146112A CN 201910434994 A CN201910434994 A CN 201910434994A CN 110146112 A CN110146112 A CN 110146112A
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Abstract
The present embodiments relate to a kind of two-dimentional phase sensitivity demodulation method and devices.A kind of two dimension phase sensitivity demodulation method, comprising: obtain two-dimentional amplitude modulation gray level image and two-dimensional reference signal, include two-dimentional carrier signal and two-dimensional modulation signal in the two dimension amplitude modulation gray level image；It determines the two-dimentional amplitude modulation gray level image and two-dimensional reference signal is the two-way input of default multiplier；The two-dimentional amplitude modulation gray level image and two-dimensional reference signal are inputted into the default multiplier, obtain intermediate result；Determine that the intermediate result is the input of default low-pass filter；The intermediate result is inputted into the default low-pass filter, the two-dimentional amplitude modulation gray level image is demodulated.
Description
Technical field
The present embodiments relate to field of computer technology more particularly to a kind of two-dimentional phase sensitivity demodulation methods and device.
Background technique
Detecting technique is detected and is identified pair according to the feature of the light wave of inspected object radiation, reflection, scattering
A kind of technology of elephant, the fields such as target acquisition, warship photodetection, extraterrestrial target, substance characteristics detection are widely used under water.
In detecting technique actual application, since noise is lower under certain environment, lead to common imaging method
Image quality is poor, or even can not tell the target object in image, and to light wave parameter (amplitude, frequency, phase, polarization etc.)
Being modulated and demodulating is the effective ways for improving signal-to-noise ratio, and light intensity temporal modulation method is detecting technique using most at present
Extensive method.
Although light wave parameter can be modulated and be demodulated using light intensity temporal modulation method, to reach raising signal-to-noise ratio
Purpose, but need to carry out multi collect to signal or image, detection takes a long time.
Summary of the invention
In consideration of it, to solve above-mentioned technical problem or partial technical problems, the embodiment of the present invention provides a kind of two-dimentional phase sensitivity
Demodulation method and device.
In a first aspect, the embodiment of the present invention provides a kind of two-dimentional phase sensitivity demodulation method, this method comprises:
Two-dimentional amplitude modulation gray level image and two-dimensional reference signal are obtained, includes two dimension in the two dimension amplitude modulation gray level image
Carrier signal and two-dimensional modulation signal；
It determines the two-dimentional amplitude modulation gray level image and two-dimensional reference signal is the two-way input of default multiplier；
The two-dimentional amplitude modulation gray level image and two-dimensional reference signal are inputted into the default multiplier, obtain intermediate knot
Fruit；
Determine that the intermediate result is the input of default low-pass filter；
The intermediate result is inputted into the default low-pass filter, the two-dimentional amplitude modulation gray level image is demodulated.
In a possible embodiment, described that the intermediate result is inputted into the default low-pass filter, to institute
Two-dimentional amplitude modulation gray level image is stated to be demodulated, comprising:
The intermediate result is inputted into the default low-pass filter, extracts two from the two-dimentional amplitude modulation gray level image
Tie up modulated signal.
In a possible embodiment, the two-dimentional carrier signal for including in the unknown two-dimentional amplitude modulation gray level image
In the case where, the two-dimentional carrier signal for including in the two-dimensional reference signal and the two-dimentional amplitude modulation gray level image is inconsistent.
In a possible embodiment, the two-dimentional carrier signal for including in the known two-dimentional amplitude modulation gray level image
In the case where, the two-dimentional carrier signal for including in the two-dimensional reference signal and the two-dimentional amplitude modulation gray level image is consistent.
In a possible embodiment, the two-dimentional carrier signal for including in the unknown two-dimentional amplitude modulation gray level image
In the case where, the two-dimentional amplitude modulation gray level image of the acquisition and two-dimensional reference signal, comprising:
Obtain two-dimentional amplitude modulation gray level image；
Two-dimensional reference signal is extracted from the two-dimentional amplitude modulation gray level image according to preset first extracting rule, it is described to mention
Taking rule is mean value removal rule；
Obtain the two-dimensional reference signal.
Second aspect, the embodiment of the present invention provide a kind of two-dimentional phase sensitivity demodulating equipment, which includes:
Image and signal acquisition module, for obtaining two-dimentional amplitude modulation gray level image and two-dimensional reference signal, the two dimension
Include two-dimentional carrier signal and two-dimensional modulation signal in amplitude modulation gray level image；
First determining module, for determining the two-dimentional amplitude modulation gray level image and two-dimensional reference signal for default multiplication
The two-way of device inputs；
Image and signal input module, for the two-dimentional amplitude modulation gray level image and two-dimensional reference signal to be inputted institute
Default multiplier is stated, intermediate result is obtained；
Second determining module, for determining that the intermediate result is the input of default low-pass filter；
Image demodulation module, for the intermediate result to be inputted the default low-pass filter, to the two-dimentional amplitude modulation
Gray level image is demodulated.
In a possible embodiment, described image demodulation module is specifically used for:
The intermediate result is inputted into the default low-pass filter, extracts two from the two-dimentional amplitude modulation gray level image
Tie up modulated signal.
In a possible embodiment, the two-dimentional carrier signal for including in the unknown two-dimentional amplitude modulation gray level image
In the case where, the two-dimentional carrier signal for including in the two-dimensional reference signal and the two-dimentional amplitude modulation gray level image is inconsistent.
In a possible embodiment, the two-dimentional carrier signal for including in the known two-dimentional amplitude modulation gray level image
In the case where, the two-dimentional carrier signal for including in the two-dimensional reference signal and the two-dimentional amplitude modulation gray level image is consistent.
In a possible embodiment, the two-dimentional carrier signal for including in the unknown two-dimentional amplitude modulation gray level image
In the case where, described image and signal acquisition module are specifically used for:
Obtain two-dimentional amplitude modulation gray level image；
Two-dimensional reference signal is extracted from the two-dimentional amplitude modulation gray level image according to preset first extracting rule, it is described to mention
Taking rule is mean value removal rule；
Obtain the two-dimensional reference signal.
Technical solution provided in an embodiment of the present invention, by multiplier to two-dimentional amplitude modulation gray level image, and two dimension reference
Signal is handled to obtain intermediate result, is the input of low-pass filter by the intermediate result, which is inputted low pass
Filter demodulates two-dimentional amplitude modulation gray level image.Such embodiment of the present invention is by utilizing multiplier and low-pass filtering
Device can inhibit the noise in two-dimentional amplitude modulation gray level image, greatly improve the signal-to-noise ratio of two-dimentional amplitude modulation gray level image, without to right
Signal or image carry out multi collect, and it is time-consuming to reduce detection.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
The some embodiments recorded in inventive embodiments can also obtain according to these attached drawings for those of ordinary skill in the art
Obtain other attached drawings
Fig. 1 is the flow diagram of the two-dimentional phase sensitivity demodulation method shown in the embodiment of the present invention；
Fig. 2 is the shield glass defect detecting system shown in the embodiment of the present invention；
Fig. 3 is the structural schematic diagram of the two-dimentional phase sensitivity demodulating equipment shown in the embodiment of the present invention.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art
Every other embodiment obtained without making creative work, shall fall within the protection scope of the present invention.
In order to facilitate understanding of embodiments of the present invention, it is further explained below in conjunction with attached drawing with specific embodiment
Bright, embodiment does not constitute the restriction to the embodiment of the present invention.
Technical solution provided in an embodiment of the present invention can be applied to two-dimentional phase sensitive detector, and two-dimentional phase sensitive detector is by multiplying
Musical instruments used in a Buddhist or Taoist mass and low-pass filter composition, the input signal u of multiplieri(m, n) is the two dimension amplitude-modulated signal as shown in formula (1), m, n
For two-dimentional variable, usinal(m, n) is two-dimentional low frequency measurement signal (corresponding to subsequent two-dimensional modulation signal), cos (α m) cos (β
It n) is two-dimentional carrier signal.The another way input signal u of multiplierr(m, n) (shown in formula (2)) is and high-frequency carrier signal frequency
The same two-dimensional reference signal.The output signal u of multipliero1In (m, n) include five product terms, due to cos (2 α m+2 β n),
Cos (2 α m-2 β n), cos (2 α m) and cos (2 β n) (shown in formula (3)) are high fdrequency component, according to product to sum formula, usinal(m,
N) it is multiplied, is equivalent to from the point of view of frequency domain by u with this four high fdrequency componentssinalThese high fdrequency components are arrived in the resettlement of (m, n) signal spectrum
Near, this four product terms will be filtered out after passing through low-frequency filter, when the cutoff frequency of selection low-pass filter is greater than usinal
When (m, n) signal frequency,Therefore (shown in formula (4)) item signal can export by low-pass filter, two-dimensional phase
Quick demodulator can demodulate two-dimentional low frequency measurement signal from two-dimentional amplitude-modulated signal.
ui(m, n)=usinal(m,n)cos(αm)cos(βn)； (1)
ur(m, n)=cos (α m) cos (β n)； (2)
Based on above-mentioned two-dimentional phase sensitive detector, as shown in Figure 1, for a kind of two-dimentional phase sensitivity solution provided by the embodiment of the present invention
The implementation flow chart of tune method, this method can specifically include following steps:
S101 obtains two-dimentional amplitude modulation gray level image and two-dimensional reference signal, includes in the two dimension amplitude modulation gray level image
Two-dimentional carrier signal and two-dimensional modulation signal；
S102, determines the two-dimentional amplitude modulation gray level image and two-dimensional reference signal is the two-way input of default multiplier；
The two-dimentional amplitude modulation gray level image and two-dimensional reference signal input the default multiplier by S103, obtains
Between result；
S104 determines that the intermediate result is the input of default low-pass filter；
The intermediate result is inputted the default low-pass filter by S105, is carried out to the two-dimentional amplitude modulation gray level image
Demodulation.
In embodiments of the present invention, two-dimentional amplitude modulation gray level image and two-dimensional reference signal are obtained, wherein two-dimentional amplitude modulation ash
It spends in image comprising two-dimentional carrier signal and two-dimensional modulation signal, i.e., two-dimentional low frequency measurement signal as stated above and two
Tie up carrier signal.
In the case where the two-dimentional carrier signal for including in the unknown two-dimentional amplitude modulation gray level image, the two dimension is with reference to letter
Number inconsistent with the two-dimentional carrier signal that includes in the two-dimentional amplitude modulation gray level image, then the two-dimensional reference signal can be just
String signal, cosine signal, square-wave signal etc..
In the case where the two-dimentional carrier signal for including in the unknown two-dimentional amplitude modulation gray level image, two-dimentional amplitude modulation ash is obtained
Image is spent, two-dimensional reference signal is extracted from the two-dimentional amplitude modulation gray level image according to preset first extracting rule, it is described to mention
Taking rule is mean value removal rule, obtains the two-dimensional reference signal.Wherein mean value removal rule is subsequent in the embodiment of the present invention
It is illustrated.
In the case where the two-dimentional carrier signal for including in the known two-dimentional amplitude modulation gray level image, the two dimension is with reference to letter
It is number consistent with the two-dimentional carrier signal for including in the two-dimentional amplitude modulation gray level image.Such as it is wrapped in the two-dimentional amplitude modulation gray level image
The two-dimentional carrier signal contained is sinusoidal signal, and the two-dimensional reference signal is similarly sinusoidal signal.
In embodiments of the present invention, there are two-way inputs for multiplier, wherein determine the two-dimentional amplitude modulation gray level image, and
Two-dimensional reference signal is the two-way input of default multiplier.
The two-dimentional amplitude modulation gray level image and two-dimensional reference signal are inputted into the default multiplier, obtain intermediate knot
Fruit, the intermediate result, such as can be as shown in above-mentioned formula 3.
In embodiments of the present invention, multiplier is exported, i.e., above-mentioned centre is as a result, input as low-pass filter, i.e.,
Determine that the intermediate result is the input of default low-pass filter.
The intermediate result is inputted into the default low-pass filter, the two-dimentional amplitude modulation gray level image is demodulated,
On the one hand the signal-to-noise ratio of two-dimentional amplitude modulation gray level image can be greatly improved, separately to the noise inhibited in two-dimentional amplitude modulation gray level image
On the one hand the intermediate result can be inputted into the default low-pass filter, is extracted from the two-dimentional amplitude modulation gray level image
Two-dimensional modulation signal.
By the above-mentioned description to technical solution provided by the present application, by multiplier to two-dimentional amplitude modulation gray level image, with
And two-dimensional reference signal is handled to obtain intermediate result, is the input of low-pass filter by the intermediate result, which is tied
Fruit inputs low-pass filter, demodulates to two-dimentional amplitude modulation gray level image.Such embodiment of the present invention by using multiplier with
And low-pass filter, the noise in two-dimentional amplitude modulation gray level image can be inhibited, greatly improve the noise of two-dimentional amplitude modulation gray level image
Than it is time-consuming to reduce detection without carrying out multi collect to signal or image.
In addition, the embodiment of the present invention combines a concrete application scene to be illustrated above-mentioned two-dimentional phase sensitivity demodulation method.
Electromagenetic wave radiation not only influences the work of electronic equipment, also has great harm to human body, in the electricity of military field
Magnetic radiation is likely to result in the leakage of state secret information.In order to eliminate the harm of electromagnetic radiation bring, electromangnetic spectrum is aobvious
It obtains particularly significant.Electromagnetic shielding glass is handled by special process, is covered conductive coating in glass surface or is pressed from both sides in glass
Enter wire mesh, realizes blocking and decaying to electromagnetic wave.Shield glass is other than with translucency and visuality, it is necessary to
There is good shielding properties, and therefore the performance that the defect of shield glass will have a direct impact on its effect carries out shield glass scarce
Sunken detection is a highly important link, and civilian and military application field can be entered to avoid flaw product.
As shown in Fig. 2, passing through high-resolution phase for a kind of shield glass defect detecting system shown in the embodiment of the present invention
Machine acquires shield glass 2-D gray image I (m, n), since main component is to carry in shield glass 2-D gray image I (m, n)
Wave signal, thus it is approximate using the method (mean value removes rule) that shield glass 2-D gray image I (m, n) subtracts its average value
Extract carrier signal I3a(m, n) is equivalent to approximate extraction carrier signal here, passes through above-mentioned two-dimentional phase sensitivity demodulation method (multiplication
Two processes of device and low-pass filter) extract shield glass 2-D gray image I (m, n) in low frequency flaw indication I3o(m,
n)。
Furthermore for shield glass 2-D gray image I (m, n), for glass will be shielded from precision carrier signal is wherein extracted
Glass 2-D gray image I (m, n) is frequency-region signal F by FFT transform4a(u, v), by setting preset threshold, by frequency-region signal
F4aAmplitude is greater than the part F of threshold value in (u, v)4b(u, v) is considered the frequency spectrum of carrier signal, extracts carrier wave using IFFT
Signal I4a(m, n), carrier signal I4aAfter (m, n) and input original image I (m, n) are multiplied, airspace signal I is obtained4b(m, n), then
Its frequency spectrum F is obtained by FFT4c(u, v), the spectrum component of signal is migrated to high frequency direction after multiplication, is conducive to improve low pass filtered
Wave effect, F4c(u, v) forms the corresponding frequency spectrum F of low frequency defect image after this filter filtering4d(u, v) is obtained by IFFT
To the defect image I of low frequency4o(m, n), I4oAfter (m, n) binaryzation it can be pointed out that defect position.
It is easy to be influenced by various interference and noise in two-dimentional amplitude modulation gray level image demodulating process, reduces the essence of detection
The reliability of degree and target identification.By the way that the influence of low frequency ambient noise can be reduced after modulating, furthermore pass through two-dimentional phase sensitivity
Demodulation method can inhibit noise significantly, improve output signal-to-noise ratio.The essence of two-dimentional phase demodulation be using reference signal and by
Include the correlation of amplitude-modulated signal (two-dimentional carrier signal and two-dimensional modulation signal) in the two-dimentional amplitude modulation gray level image of demodulation, leads to
Cross be multiplied nonlinear interaction by the frequency spectrum of low-frequency modulation signal from the position of high frequency carrier resettlement to higher frequency position and
Low frequency position recycles the selecting frequency characteristic of low-pass filter to extract low-frequency modulation signal；The frequency model of two-dimentional phase demodulation output
Enclosing is centered on carrier frequency, and low pass filter cutoff frequency is the region of radius, and the frequency spectrum of output noise is also in this range
It is interior, therefore, when the frequency of low frequency signal is very low, low-down low pass filter cutoff frequency, output noise can be set
It reduces, low frequency signal can be extracted from the amplitude-modulated signal that noise floods.The object of two-dimentional phase demodulation is two-dimentional amplitude modulation ash
The two-dimentional carrier signal and two-dimensional modulation signal for including in degree image, formation can use lighting source carrier wave driving side
Formula, machinery modulation mode etc. are actively modulated, and can also carry carrier format using as this test object of shield glass.
Relative to above method embodiment, the embodiment of the invention also provides a kind of two-dimentional phase sensitivity demodulating equipments, such as Fig. 3 institute
Show, may include: image and signal acquisition module 310, the first determining module 320, image and signal input module 330, second
Determining module 340, image demodulation module 350.
Image and signal acquisition module 310, it is described for obtaining two-dimentional amplitude modulation gray level image and two-dimensional reference signal
Include two-dimentional carrier signal and two-dimensional modulation signal in two-dimentional amplitude modulation gray level image；
First determining module 320, for determining that the two-dimentional amplitude modulation gray level image and two-dimensional reference signal multiply to be default
The two-way of musical instruments used in a Buddhist or Taoist mass inputs；
Image and signal input module 330, for inputting the two-dimentional amplitude modulation gray level image and two-dimensional reference signal
The default multiplier, obtains intermediate result；
Second determining module 340, for determining that the intermediate result is the input of default low-pass filter；
Image demodulation module 350 adjusts the two dimension for the intermediate result to be inputted the default low-pass filter
Width gray level image is demodulated.
According to a kind of specific embodiment provided by the present application, described image demodulation module 350 is specifically used for:
The intermediate result is inputted into the default low-pass filter, extracts two from the two-dimentional amplitude modulation gray level image
Tie up modulated signal.
According to a kind of specific embodiment provided by the present application, include in the unknown two-dimentional amplitude modulation gray level image two
In the case where tieing up carrier signal, the two-dimentional carrier signal that includes in the two-dimensional reference signal and the two-dimentional amplitude modulation gray level image
It is inconsistent.
According to a kind of specific embodiment provided by the present application, include in the known two-dimentional amplitude modulation gray level image two
In the case where tieing up carrier signal, the two-dimentional carrier signal that includes in the two-dimensional reference signal and the two-dimentional amplitude modulation gray level image
Unanimously.
According to a kind of specific embodiment provided by the present application, include in the unknown two-dimentional amplitude modulation gray level image two
In the case where tieing up carrier signal, described image and signal acquisition module 310 are specifically used for:
Obtain two-dimentional amplitude modulation gray level image；
Two-dimensional reference signal is extracted from the two-dimentional amplitude modulation gray level image according to preset first extracting rule, it is described to mention
Taking rule is mean value removal rule；
Obtain the two-dimensional reference signal.
The function of modules and the realization process of effect are specifically detailed in the above method and correspond to step in above-mentioned apparatus
Realization process, details are not described herein.
Professional should further appreciate that, described in conjunction with the examples disclosed in the embodiments of the present disclosure
Unit and algorithm steps, can be realized with electronic hardware, computer software, or a combination of the two, hard in order to clearly demonstrate
The interchangeability of part and software generally describes each exemplary composition and step according to function in the above description.
These functions are implemented in hardware or software actually, the specific application and design constraint depending on technical solution.
Professional technician can use different methods to achieve the described function each specific application, but this realization
It should not be considered as beyond the scope of the present invention.
The step of method described in conjunction with the examples disclosed in this document or algorithm, can be executed with hardware, processor
The combination of software module or the two is implemented.Software module can be placed in random access memory (RAM), memory, read-only memory
(ROM), electrically programmable ROM, electrically erasable ROM, register, hard disk, moveable magnetic disc, CD-ROM or technical field
In any other form of storage medium well known to interior.
Above-described specific embodiment has carried out further the purpose of the present invention, technical scheme and beneficial effects
It is described in detail, it should be understood that being not intended to limit the present invention the foregoing is merely a specific embodiment of the invention
Protection scope, all within the spirits and principles of the present invention, any modification, equivalent substitution, improvement and etc. done should all include
Within protection scope of the present invention.
Claims (10)
1. a kind of two dimension phase sensitivity demodulation method, which is characterized in that this method comprises:
Two-dimentional amplitude modulation gray level image and two-dimensional reference signal are obtained, includes two-dimentional carrier wave in the two dimension amplitude modulation gray level image
Signal and two-dimensional modulation signal；
It determines the two-dimentional amplitude modulation gray level image and two-dimensional reference signal is the two-way input of default multiplier；
The two-dimentional amplitude modulation gray level image and two-dimensional reference signal are inputted into the default multiplier, obtain intermediate result；
Determine that the intermediate result is the input of default low-pass filter；
The intermediate result is inputted into the default low-pass filter, the two-dimentional amplitude modulation gray level image is demodulated.
2. the method according to claim 1, wherein described input the default low pass filtered for the intermediate result
Wave device demodulates the two-dimentional amplitude modulation gray level image, comprising:
The intermediate result is inputted into the default low-pass filter, extracts two-dimentional tune from the two-dimentional amplitude modulation gray level image
Signal processed.
3. the method according to claim 1, wherein include in the unknown two-dimentional amplitude modulation gray level image two
In the case where tieing up carrier signal, the two-dimentional carrier signal that includes in the two-dimensional reference signal and the two-dimentional amplitude modulation gray level image
It is inconsistent.
4. the method according to claim 1, wherein include in the known two-dimentional amplitude modulation gray level image two
In the case where tieing up carrier signal, the two-dimentional carrier signal that includes in the two-dimensional reference signal and the two-dimentional amplitude modulation gray level image
Unanimously.
5. the method according to claim 1, wherein include in the unknown two-dimentional amplitude modulation gray level image two
In the case where tieing up carrier signal, the two-dimentional amplitude modulation gray level image of the acquisition and two-dimensional reference signal, comprising:
Obtain two-dimentional amplitude modulation gray level image；
Two-dimensional reference signal, the extraction rule are extracted from the two-dimentional amplitude modulation gray level image according to preset first extracting rule
It is then mean value removal rule；
Obtain the two-dimensional reference signal.
6. a kind of two dimension phase sensitivity demodulating equipment, which is characterized in that described device includes:
Image and signal acquisition module, for obtaining two-dimentional amplitude modulation gray level image and two-dimensional reference signal, the two dimension amplitude modulation
Include two-dimentional carrier signal and two-dimensional modulation signal in gray level image；
First determining module, for determining the two-dimentional amplitude modulation gray level image and two-dimensional reference signal be to preset multiplier
Two-way input；
Image and signal input module, for the two-dimentional amplitude modulation gray level image and two-dimensional reference signal input is described pre-
If multiplier obtains intermediate result；
Second determining module, for determining that the intermediate result is the input of default low-pass filter；
Image demodulation module, for the intermediate result to be inputted the default low-pass filter, to the two-dimentional amplitude modulation gray scale
Image is demodulated.
7. device according to claim 6, which is characterized in that described image demodulation module is specifically used for:
The intermediate result is inputted into the default low-pass filter, extracts two-dimentional tune from the two-dimentional amplitude modulation gray level image
Signal processed.
8. device according to claim 6, which is characterized in that include in the unknown two-dimentional amplitude modulation gray level image two
In the case where tieing up carrier signal, the two-dimentional carrier signal that includes in the two-dimensional reference signal and the two-dimentional amplitude modulation gray level image
It is inconsistent.
9. device according to claim 6, which is characterized in that include in the known two-dimentional amplitude modulation gray level image two
In the case where tieing up carrier signal, the two-dimentional carrier signal that includes in the two-dimensional reference signal and the two-dimentional amplitude modulation gray level image
Unanimously.
10. device according to claim 6, which is characterized in that include in the unknown two-dimentional amplitude modulation gray level image
In the case where two-dimentional carrier signal, described image and signal acquisition module are specifically used for:
Obtain two-dimentional amplitude modulation gray level image；
Two-dimensional reference signal, the extraction rule are extracted from the two-dimentional amplitude modulation gray level image according to preset first extracting rule
It is then mean value removal rule；
Obtain the two-dimensional reference signal.
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100513712B1 (en) * | 2000-04-08 | 2005-09-07 | 삼성전자주식회사 | power backoff method and devide thereof |
| CN101354380A (en) * | 2007-07-23 | 2009-01-28 | 北京航空航天大学 | Vortex flow and electromagnetic ultrasonic combined type nondestructive detection method |
| CN101727811A (en) * | 2008-10-24 | 2010-06-09 | 索尼株式会社 | Image processing apparatus, image processing method, and computer program |
| CN105447854A (en) * | 2015-11-12 | 2016-03-30 | 程涛 | Small-size glass panel surface defect detection method and small-size glass panel surface defect detection system |
| CN108572181A (en) * | 2018-05-15 | 2018-09-25 | 佛山市南海区广工大数控装备协同创新研究院 | A kind of mobile phone bend glass defect inspection method based on streak reflex |
| CN109668909A (en) * | 2017-10-13 | 2019-04-23 | 南京敏光视觉智能科技有限公司 | A kind of glass defect detection method |
-
2019
- 2019-05-23 CN CN201910434994.0A patent/CN110146112B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100513712B1 (en) * | 2000-04-08 | 2005-09-07 | 삼성전자주식회사 | power backoff method and devide thereof |
| CN101354380A (en) * | 2007-07-23 | 2009-01-28 | 北京航空航天大学 | Vortex flow and electromagnetic ultrasonic combined type nondestructive detection method |
| CN101727811A (en) * | 2008-10-24 | 2010-06-09 | 索尼株式会社 | Image processing apparatus, image processing method, and computer program |
| CN105447854A (en) * | 2015-11-12 | 2016-03-30 | 程涛 | Small-size glass panel surface defect detection method and small-size glass panel surface defect detection system |
| CN109668909A (en) * | 2017-10-13 | 2019-04-23 | 南京敏光视觉智能科技有限公司 | A kind of glass defect detection method |
| CN108572181A (en) * | 2018-05-15 | 2018-09-25 | 佛山市南海区广工大数控装备协同创新研究院 | A kind of mobile phone bend glass defect inspection method based on streak reflex |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110567989A (en) * | 2019-09-04 | 2019-12-13 | 北京信息科技大学 | shielding glass defect detection method |
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