CN107316623A - A kind of brightness correcting method and luminance correction device of medical science display device - Google Patents

A kind of brightness correcting method and luminance correction device of medical science display device Download PDF

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Publication number
CN107316623A
CN107316623A CN201610270178.7A CN201610270178A CN107316623A CN 107316623 A CN107316623 A CN 107316623A CN 201610270178 A CN201610270178 A CN 201610270178A CN 107316623 A CN107316623 A CN 107316623A
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values
value
sequences
jnd
ddl
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田广
郭攀
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Qingdao Hisense Electronics Co Ltd
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Qingdao Hisense Electronics Co Ltd
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    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G5/00—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
    • G09G5/10—Intensity circuits
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/02—Improving the quality of display appearance
    • G09G2320/0271—Adjustment of the gradation levels within the range of the gradation scale, e.g. by redistribution or clipping

Abstract

The invention discloses a kind of brightness correcting method and luminance correction device of medical science display device, be related to medical image display technology field, to solve manually to carry out the inefficiency caused by gamma correction in the prior art, and calibration accuracy rate it is not high the problem of.This method includes：P value sequences are exported to medical science display device, to obtain the corresponding measurement sequence of the P value sequences；The corresponding JND value sequences of P value sequences described in two exploitations in measurement sequence；Each JND values corresponding luminance standard value on GSDF curves in JND value sequences is calculated, to obtain the standard sequence of the M luminance standard value compositions；In corresponding relation of the measurement sequence with P value sequences, corresponding P values are as DDL values in each luminance standard value of acquisition, to obtain the DDL sequences of M DDL values composition；Generate P value sequences and the corresponding relation of DDL sequences.

Description

A kind of brightness correcting method and luminance correction device of medical science display device
Technical field
The present invention relates to medical image display technology field, more particularly to a kind of medical science display device is bright Spend bearing calibration and luminance correction device.
Background technology
With the development of computer science, medical image has become what is quickly grown in the world One field.Digital imaging and communications in medicine (Digital Imaging and Communications in Medicine, abbreviation DICOM) now as the use of medical image standard so that medical science figure As data can be transmitted between the different medical science display devices that different manufacturers produce, exchange And storage.
Generally, gray scale image is shown in medical science display device, according to the brightness depth of gray scale image come Diagnose the illness.However, due to liquid crystal display used in different medical science display devices, to there may be some poor It is different, thus for same medical image, its doctor shown on different medical science display devices Learning the brightness of image may have differences.For a fixed medical science display device, During long-term use, with the aging of equipment, the brightness of its medical image shown can also go out Existing error.If bright as defined in the brightness for the medical image that medical science display device is shown and dicom standard Degree, which is compared, has larger error, then medical personnel just can not correctly diagnose according to the medical image Disease.Therefore, when the appearance luminosity response error of medical science display device, it is necessary to which medical science is shown The brightness of equipment is corrected.It can be corrected in the prior art by the method manually soundd out, this Sample can have an inefficiency, and correction accuracy rate it is not high the problem of.
The content of the invention
The embodiments of the invention provide a kind of brightness correcting method and gamma correction of medical science display device Device, to solve the inefficiency caused by artificial progress gamma correction in the prior art, and correction is accurate The problem of really rate is not high.
In a first aspect, the embodiments of the invention provide a kind of brightness correcting method of medical science display device, Including：
P value sequences are exported to medical science display device, to obtain the corresponding measurement sequence of the P value sequences, The P value sequences include M P value, and the measurement sequence includes the corresponding M of the M P values Individual brightness measurements, the M brightness measurements include the first brightness measurements and the second brightness measurement Value, M >=3；
First brightness measurements and second brightness measurements are calculated respectively to standardize in GTG Corresponding first JND values and the 2nd JND values on explicit function GSDF curves；
According to the first JND values and the 2nd JND values, the P value sequences are calculated corresponding JND value sequences, the JND value sequences include the corresponding M JND values of the M P values, And the ratio between the difference in the JND value sequences per two neighboring JND values and the P values sequence The ratio between difference in row per two neighboring P values is identical；
Calculate each JND values corresponding luminance standard on GSDF curves in the JND value sequences Value, to obtain the standard sequence of the M luminance standard value compositions；
In corresponding relation of the measurement sequence with the P value sequences, each brightness scale is obtained Corresponding P values are as DDL values in quasi- value, to obtain the DDL sequences of M DDL values composition；
Generate the corresponding relation of the P value sequences and the DDL sequences.
Second aspect, present embodiments provides a kind of luminance correction device, including：
Output module, for inputting P value sequences to medical science display device；
Receiving module, for obtaining the corresponding measurement sequence of the P value sequences, the P value sequences bag M P value is included, the measurement sequence includes the corresponding M brightness measurements of the M P values, The M brightness measurements include the first brightness measurements and the second brightness measurements, M >=3；
Processing module, for calculating first brightness measurements and second brightness measurements respectively Corresponding first JND values and the 2nd JND values on GTG standardized display function GSDF curves； According to the first JND values and the 2nd JND values, the corresponding JND of the P value sequences is calculated Value sequence, the JND value sequences include the corresponding M JND values of the M P values, and institute State in the ratio and the P value sequences between the difference in JND value sequences per two neighboring JND values The ratio between difference per two neighboring P values is identical；Calculate each JND in the JND value sequences Value corresponding luminance standard value on GSDF curves, is constituted with obtaining the M luminance standard values Standard sequence；In corresponding relation of the measurement sequence with the P value sequences, each institute is obtained The corresponding P values of luminance standard value are stated as DDL values, to obtain the DDL of M DDL values composition Sequence；Generate the corresponding relation of the P value sequences and the DDL sequences.
Brightness correcting method and device that the present embodiment is provided, by luminance correction device to be corrected Medical science display device inputs a P value sequences, thus obtain shown by medical science display device to should P One measurement brightness sequence of value sequence, enters one and obtains luminance standard value sequence and luminance standard value sequence Correspondence DDL sequences, so as to generate the corresponding relation between P value sequences and DDL sequences.This is whole Individual process is carried out automatically according to algorithm pre-set etc. by luminance correction device, without artificial Sound out, therefore can solve manually to carry out the inefficiency caused by gamma correction in the prior art, and The problem of calibration accuracy rate is not high.
The third aspect, the present embodiment additionally provides a kind of brightness correcting method of medical science display device, bag Include：
Host computer sends a P values to slave computer；
After the slave computer exports the P values to medical science display device, P is fed back to the host computer Value successfully sends information；
The host computer reads and sends the corresponding brightness measurements of the P values to the slave computer；
The data that the host computer reads the slave computer transmission are properly received after information, are circulated to institute State slave computer and send next P values, until the host computer reads the slave computer for last Untill the data that individual P values are sent are properly received information, the data, which are properly received information, to be used to indicate institute State slave computer and received the brightness measurements, the host computer sends the sum of P values for M, M >= 3；
P value sequences and the M brightness measurements that the slave computer is constituted according to the M P values Be worth the measurement retrieval DDL sequences of composition, and to the host computer send the DDL sequences, Or the P value sequences and the corresponding relation of the DDL sequences, so that the host computer obtains institute State the corresponding relation of P value sequences and the DDL sequences.
Fourth aspect, present embodiments provides a kind of luminance correction device of medical science display device, including： Host computer and slave computer；Wherein,
The host computer is used to send a P values to slave computer；
The slave computer is used for after the P values are exported to medical science display device, anti-to the host computer Feedback P values successfully send information；
The host computer is additionally operable to and sends the corresponding brightness measurements of the P values to the slave computer；
The data that the host computer is additionally operable to read the slave computer transmission are properly received after information, are followed Slave computer described in ring sends next P values, until the host computer reads the slave computer and is directed to Untill the data that last P value is sent are properly received information, the data, which are properly received information, to be used for Indicate that the slave computer has received the brightness measurements；
The slave computer is additionally operable to the P value sequences constituted according to the M P values and M described bright Spend measurement set into measurement retrieval DDL sequences, and send the DDL to the host computer Sequence or the P value sequences and the corresponding relation of the DDL sequences, so as to the host computer Obtain the corresponding relation of the P value sequences and the DDL sequences.
Brightness correcting method and device that the present embodiment is provided, are engaged by host computer and slave computer, Slave computer to obtain to measure sequence, and then the method that may be provided according to first aspect or The other method (method that other all more measurement sequences calculate DDL sequences) known, is calculated DDL sequences, and then the corresponding relation of DDL sequences and P value sequences can be obtained, to realize to doctor Learn the correction of display device.In such manner, it is possible to mitigate the operating load of the host computer during gamma correction, And then improve overall calculation efficiency.
Brief description of the drawings
Fig. 1 is that the standard in dicom standard shows system model schematic diagram；
Fig. 2 is that the standard shown in Fig. 1 shows corresponding relation between input value and output valve in system model Curve；
Fig. 3 is the GSDF curves in dicom standard；
Fig. 4 by luminance correction device provided in an embodiment of the present invention with medical science display device is constituted is System schematic diagram；
Fig. 5 is the flow that luminance correction device provided in an embodiment of the present invention performs brightness correcting method Figure；
Fig. 6 is the schematic diagram of the display screen of medical science display device provided in an embodiment of the present invention；
Fig. 7 is provided in an embodiment of the present invention by two brightness measurements combination GSDF curves, is obtained The schematic diagram of two JND values；
Fig. 8 is inside luminance correction device provided in an embodiment of the present invention and luminance correction device and doctor Learn the schematic diagram of the information interaction of display device；
Fig. 9 is a kind of luminance correction device block diagram provided in an embodiment of the present invention；
Figure 10 is another luminance correction device block diagram provided in an embodiment of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is entered Row is clearly and completely described, it is clear that described embodiment is only a part of embodiment of the invention, Rather than whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art are not having There is the every other embodiment made and obtained under the premise of creative work, belong to what the present invention was protected Scope.
For the ease of clearly describing the technical scheme of the embodiment of the present invention, in an embodiment of the present invention, The printed words such as " first ", " second " are employed to enter function and the essentially identical identical entry of effect or similar item Row is distinguished, it will be appreciated by those skilled in the art that the printed words such as " first ", " second " to quantity and are not held Row order is defined.
In order to ensure that different medical science display devices can show medical image with same standard, ash Rank standardized display function (Grayscale Standard Display Function, referred to as GSDF) Standard formulation committee design code standard as shown in Figure 1 shows system model (Standardized Display System, SDS), its related content is included in dicom standard PS3.14.Doctor The operation principle for learning display device follows standard display system model.
As shown in figure 1, the standard shows that system model includes P values to DDL converting unit (P-Values to DDLs) and display unit (Display System), the conversion of P values to DDL Unit can be by each P values (each P-Value correspondence in P-Values, P-Values of input One grey decision-making) corresponding multiple DDL (DDLs) are converted into, display unit can be according to DDLs Show corresponding brightness (Luminance).
Wherein, P-Value (P values) is in the unrelated with equipment of appreciable linear gradation definition space Numerical value, the numerical value can characterize brightness, it can be said that being and device-independent luminance characterization numerical value. DICOM description displays look-up table (the DICOM Presentation Look-Up-Table, Look-Up-Table may be simply referred to as LUT) what is exported is P- values, for example, it may be all The pixel value that the gradation conversion that DICOM is defined is produced after being employed.P- values can be input into one The display system of standard.Definition particularly for P values may be referred to dicom standard PS3.14.
Specifically, P-Value value can by N-bit (bit) integer representation, its span It is (0,2N-1).For example, for the medical science display device of 256 ranks, N=8, P-Value Span be 0~255, totally 256 integers.In another example, the medical science for 1024 ranks shows and set For standby, N=10, P-Value span is 0~1023, totally 1024 integers.Wherein, When a medical science display device will show a certain medical image (assuming that the medical science display device is 256 Rank, i.e. GTG series is 256), the minimum unit of display for the medical science display device input one P-Value (for 0~255 interval a certain integer), then the minimum unit of display can just be shown The corresponding brightness of the P-Value.
DDL (Digital Driving Level, alternatively referred to as digital drive values), for given one For individual medical science display device, different DDL values represent different digital actuation level, different Digital actuation level can produce different brightness (Luminance).Example, for 256 ranks Medical science display device for, the span of DDL values can be 0~255, corresponding to 256 numbers The word level of drive (magnitude of voltage)；For the medical science display device of 1024 ranks, DDL values take It is 0~1023 to be worth scope, corresponding to 1024 digital levels of drive.Generally for the display system of standard For system, DDL values can be equal to P-Value；And in actual applications, DDL values often with P-Value It is unequal, with reference to the mapping curve 10 of P-Values to the DDLs in Fig. 2.
Above-mentioned P-Values to DDLs mapping curve 10, DDLs to brightness mapping curve 11, And this two curves combinations are obtained into P-Values to the mapping curve 12 of brightness, it may be referred to Fig. 2.
In dicom standard PS3.14, the GSDF also related to based on the contrast sensitivity of people Curve, refers to Fig. 3, and transverse axis is JND values (Just Noticeable Difference, for specific Brightness, the minimum brightness that human eye can be perceived is poor, alternatively referred to as JND indexes), the longitudinal axis is corresponding Brightness value.Above-mentioned standard, which is shown in system model, to be converted into position by the P values (P-Values) of input Brightness value on GSDF curves.
For the medical science display device of 1024 ranks, GSDF curves can be by following function expression table Show：
Wherein, Ln is natural logrithm, and j represents JND intensity level LjIndex (JND values), its Span be (1~1023), a=-1.3011877, b=-2.5840191E-2, c=8.0242636E-2, D=-1.0320229E-1, e=1.3646699E-1, f=2.8745620E-2, g=-2.5468404E-2, H=-3.1978977E-3, k=1.2992634E-4, m=1.3635334E-3.
Above formula one be brightness L as dependent variable, JND values as independent variable function, we and also The function that inverse function, i.e. JND values (i.e. j values) depend on L can be obtained, referring to below equation two.
Wherein, Log10Expression denary logarithm, A=71.498068, B=94.593053, C=41.912053, D=9.8247004, E=0.28175407, F=-1.1878455, G= - 0.18014349, H=0.14710899, I=-0.017046845.
By GSDF functions, can obtain a GTG standardized display function table (GSDF table, GSDF tables), as shown in table 1, JND values (i.e. j values) are 1~1023 each integer in table, Here only example gives part, does not enumerate all.
Table 1
JND values L(cd/m2) JND values L(cd/m2) JND values L(cd/m2) JND values L(cd/m2)
1 0.0500 2 0.0547 3 0.0594 4 0.0643
5 0.0696 6 0.0750 7 0.0807 8 0.0866
9 0.0927 10 0.0991 11 0.1056 12 0.1124
13 0.1194 14 0.1267 15 0.1342 16 0.1419
…… …… …… …… …… …… …… ……
1021 3941.8580 1022 3967.5470 1023 3993.4040
In addition, standard is given in dicom standard PS3.14 shows what is inputted in system model P values (P-Values) and JND values (i.e. j) between functional relation, refer to formula three.
Wherein, P is a P values, and its span is (0,2N- 1), when 256 rank, N is 8, when 1024 rank, and N is 10, Jmin=j (Lmin), Jmax=j (Lmax), LminTo be bright Spend minimum value, LmaxFor brightness maxima.
From the content of above-mentioned dicom standard defined, the premise of dicom standard is being followed Under, for a certain medical image, it (arrives DDL's in different medical science display devices comprising P values Converting unit and display unit) on the brightness that shows should be identical in theory.However, by Some differences are there may be in liquid crystal display used in different medical science display devices, thus for same Medical image, the brightness of its medical image shown on different medical science display devices may Have differences.For a fixed medical science display device, in long-term use process In, with the aging of equipment, error also occurs in the brightness of its medical image shown.Due to error Presence, the diagnosis of disease can be influenceed, therefore, completed to the gamma correction of medical science display device, with Eliminate or decrease luminosity response error is just particularly important.
The brightness correcting method and luminance correction device of medical science display device provided in an embodiment of the present invention Gamma correction can be carried out to medical science display device, specifically want the P-Values in correction chart 2 to arrive DDLs mapping curve 10, can be with constant for DDLs to brightness mapping curve 11.Such as Fig. 4 It is shown, when needing the brightness to a certain medical science display device to be corrected, gamma correction can be filled Put and be attached with medical science display device, and then realize the gamma correction to medical science display device.Specifically , it can be attached by USB interface, P value coffrets, other signal wires can also be passed through Interface is attached, as long as the connection ensure that signal can carry out the transmission of data therebetween .Certainly, Fig. 4 is only as example, by luminance correction device independently of medical science display device it Outside, certainly, luminance correction device can also be arranged in medical science display device, shown and set as medical science Part or module in standby.
For the scheme that more clearly the explanation present invention is provided, gamma correction dress is described more fully below Put the detailed process for how carrying out gamma correction.
Embodiment one
As shown in figure 5, the embodiments of the invention provide a kind of brightness correcting method of medical science display device, The execution subject of each step of this method can be luminance correction device, and the luminance correction device can be with Be CPU (Central Processing Unit, central processing unit), SOC (System on a Chip, System level chip or on-chip system), FPGA (Field Programmable Gate Array, scene Programmable gate array) etc. at least one in processing module (hardware), naturally it is also possible to be comprising upper State the electronic equipment of at least one processing module, such as PC (personal computer, personal computer) Machine etc..In another example, the luminance correction device can also be the software for implementing following each step, herein not Limit.
The brightness correcting method comprises the following steps：
Step S101, to medical science display device export P value sequences, to obtain the P value sequences pair The measurement sequence answered.
Wherein, P value sequences include M P value, and M >=3 can be designated as { P0,P1,…,PM-1, this M P values can be arranged from small to large, can also be arranged from big to small, certainly, it is notable that this In arrangement mode just for the sake of follow-up convenient description, for example there was only this M P value with certain Magnitude relationship is arranged, then ability when using the description to represent which P value of i-th, i+1 It is clear.In the present embodiment, so that this M P value is arranged from small to large as an example, i.e. P0For P values Minimum P values, are designated as P in sequencemin；PM-1For P values maximum in P value sequences, P is designated asmax, Below as example.
It is preferred that, the P in P value sequences0For the minimum value in P value spans, in P value sequences PmaxFor the maximum in P value spans.Example, if P values span is 0~2N-1, then P0Desirable 0, PmaxDesirable 2N-1。
Measuring sequence includes the corresponding M brightness measurements of M P value, can be designated as {L_meas0,L_meas1,…,L_measM-1, L_meas0Corresponding to P0, L_meas1Corresponding to P1, with this Analogize, L_measM-1Corresponding to PM-1.P values and the corresponding relation of brightness measurements may be referred to Fig. 1, One P value is inputted to medical science display device, then medical science display device can correspond to and export corresponding brightness, And the brightness value can be in medical science display device screen sensor measurement obtain, therefore referred to as brightness measurement Value.Based between the P values and brightness value shown by curve in Fig. 2 12 have relationships of increase function, because Putting in order for brightness measurements puts in order one with each P values in P value sequences in this measurement sequence Cause.
This M brightness measurements includes the first brightness measurements and the second brightness measurements, is M Any two brightness measurements in brightness measurements.Here in order to reduce calculation error as far as possible, institute It is the bigger the better with the first brightness measurements here and the second brightness measurements difference, it is excellent in the present embodiment Elect as：First brightness measurements are P values P minimum in P value sequencesmin(i.e. P0) corresponding brightness Measured value, is designated as L_measmin(i.e. L_meas0)；Second brightness measurements be P value sequences in most Big P values Pmax(such as PM-1) corresponding brightness measurements, it is designated as L_measmax(i.e. L_measM-1)。
It is further preferred that at least M-1 P value composition arithmetic progression in P value sequences, this M-1 Individual P values be P value sequences in remove the corresponding P values of the first brightness measurements or the second brightness measurements pair P values outside the P values answered.The complexity of follow-up calculating JND sequences can be so reduced, will The labor in subsequent process.
Below using the first brightness value as L_meas0, the second brightness measurements be L_measM-1Exemplified by, then The corresponding P values of first brightness measurements are P0, the corresponding P values of the second brightness measurements are PM-1, M It is preferably 18 in this embodiment.By taking 1024 ranks as an example, P values span is 0~1023, this When can be by P0(i.e. Pmin) minimum value 0 in P value spans is set to, further can be with By PM-1The maximum 1023 in P value spans is set to, the tolerance of arithmetic progression can now be set 60 are set to, the specific algorithm of the tolerance is 60 ≈ (1023-0)/(18-1), the situation of tolerance non-integer Under, using rounding downwards, now the P value sequences can be designated as { 0,60,120,180 ..., 960,1023 }, can See preceding 17 P values composition arithmetic progression in the P value sequences.Certainly, to make rear 17 P values Composition arithmetic progression is also possible, and now P value sequences can be designated as { 0,63,123,183 ..., 963,1023 }.
Certainly, M P value in P value sequences can also constitute arithmetic progression.Above-mentioned M is real herein Apply in example is preferably 18.By taking 256 ranks as an example, P values span is 0~255, now can be by P0 (i.e. Pmin) minimum value 0 in P value spans is set to, the tolerance of arithmetic progression is set to 15, the specific algorithm of the tolerance is 15=(255-0)/(18-1), and the P value sequences so obtained can be remembered For 0,15,30 ..., 255 }.
Still more preferably, P value sequences are arithmetic progression, and its tolerance is 1, now P value sequences For { 0,1,2,3 ..., (2N- 1) }, wherein, 2NFor the GTG series of the medical science display device.With medical science The GTG series of display device is that exemplified by 256, now N=8, P value sequences are { 0,1,2,3 ..., 255 }, Totally 256 values.So that the GTG series of medical science display device is 1024 as an example, now N=10, P Value sequence is { 0,1,2,3 ..., 1023 }, totally 1024 values.It can so be carried out for each value bright Degree correction.
One of implementation of this step can be, as shown in fig. 6, on medical science display device display screen Some viewing area be provided with a sensor, detection means can be inputted to medical science display device successively M P value, and then the M brightness measurements that sensor feeds back successively can be got.Example, Detection means inputs P to medical science display device0, to cause the whole display screen of medical science display device according to defeated The P entered0It has been shown that, now sensor can collect brightness measurements L_meas0, and then cause detection means L_meas can be got0.Then, detection means inputs P to medical science display device1, to get L_meas1.By that analogy, until getting L_measM-1.It should be noted that detection means to Medical science display device inputs the order of P values, can also be put in order with individual P values in P value sequences It is different.
Wherein, detection means inputs P to medical science display device0, can only input a numerical value, By medical science display device following P are generated according to the arrangement array of the minimum unit of display in whole display screen Value matrix, it (is usually pixel/Asia picture that each element of the matrix, which corresponds to a minimum unit of display, Element)；The minimum unit of display arrangement array of such as medical science display device is S*T, then the P value matrixs It can be designated as：
For this implementation one, now the numerical value of the P value matrix all elements is P0, To cause the whole screen display P of medical science display device0Corresponding picture.
Certainly, in this implementation one, above-mentioned P value matrixs can also be generated by detection means, and The P value matrixs are exported and give medical science display device, and then realize the display of medical science display device.
The two of the implementation of this step can be, shown in Fig. 6 on medical science display device display screen Viewing area is provided with a sensor, and detection means can sequentially input M only for the viewing area P values, can not input for other regions or arbitrarily input P values, afterwards, can get sensing The M brightness measurements that device feeds back successively.
In this case, if detection means will obtain L_meas0, a P first can be generated by detection means Value matrix, the P value matrixs, which may be referred to foregoing description, has S*T element, and difference is, above-mentioned The numerical value of each element of P matrixes is identical in implementation one and is P0, and for this realization side Correspond to each element of the viewing area (region that sensor is set) for formula two, in P matrixes Numerical value be P0, other elements can arbitrarily set；Afterwards, detection means is by the P value matrixs of generation Medical science display device is inputed to, so that medical science display device can be shown accordingly according to the P values of input Picture.Afterwards, because the viewing area is provided with sensor, therefore sensor can sense P0It is right The L_meas answered0, and then cause detection means to obtain L_meas0。
If in addition, detection means will obtain L_meas0, can also show and set from detection means to medical science Standby input P0And it is provided with the positional information of the viewing area of sensor；For example the viewing area is Rectangle, now the positional information can include Fig. 6 in rectangle top left co-ordinate R0 and rectangle Bottom right angular coordinate R1.Afterwards, medical science display device can determine the positional information of the viewing area P is set to corresponding to the element in P value matrixs, and by these elements in P value matrixs0, other yuan Element can arbitrarily be set, and then medical science display device can show the corresponding picture of P values.And then sense Device can sense P0Corresponding L_meas0So that detection means obtains L_meas0。
In this implementation two, circulate M times, every time the next P values of circulation input, it is possible to Obtain measuring sequence.
The three of the implementation of this step can be that M biography is distributed on medical science display device display screen Sensor, each sensor occupies a viewing area, one P value of each sensor correspondence.Specifically, Detection means can generate a P matrixes, and with reference to above-mentioned P value matrixs, it has S*T element, Difference is that each element of viewing area where corresponding to a sensor in the P value matrixs is P0, it is right Should be P in each element of viewing area where another sensor1, the like, the matrix contains M Individual P values；It can not set arbitrarily with any viewing area (region for setting sensor) corresponding element Put.Afterwards, the P value matrixs are inputted to medical science display device, so that medical science display device can basis The P values of input show corresponding picture.Then, because M sensor can collect M respectively The corresponding M brightness measurements of individual P values, and then detection means can obtain measuring sequence.
In this implementation three or detection means to medical science display device send P value sequences Row and the positional information of each viewing area, so that medical science display device generates the P value matrixs.
Compared to first two implementation, the third implementation can just get measurement without circulation Sequence, certainly, first two implementation only need to set a sensor, no matter from cost or right It is all advantageous from the point of view of the overall display effect of display device.
Step S102, the first brightness measurements and the second brightness measurements are calculated respectively in GTG standard Change corresponding first JND values and the 2nd JND values on explicit function GSDF curves.
Here using the first brightness measurements as L_meas0(i.e. L_measmin), the second brightness measurements For L_measM-1(i.e. L_measmax) exemplified by, with reference to Fig. 7, this step need to be calculated in GSDF curves Upper corresponding first JND values (are designated as JND0) and the 2nd JND values (be designated as JNDM-1).By GSDF Curve understands that JND values and brightness value are also relationships of increase function, therefore, JND0For step S103's Minimum value in JND sequences, while being also the P in P value sequencesminCorresponding JND values；JNDM-1 For the maximum in step S103 JND sequences, while being also the P in P value sequencesmaxIt is corresponding JND values.
Computational methods can have a variety of, example, can be by L_meas0Substitute into above-mentioned " formula two " In, obtain JND0；It can equally calculate and obtain JNDM-1。
Example again, can from GSDF tables (see it is above-mentioned " table 1 ") in, pass through binary chop Method searches L_meas0It is immediate up and down standard L values, then obtain above and below standard L values corresponding two Individual JND values, later in conjunction with linear interpolation algorithm, JND is obtained by the two JND value calculating0；When If right small probability from GSDF tables, find L_meas0Identical L values, then directly can be with The corresponding JND values of the L values are found, JND is used as0.JND is obtained likewise, can calculateM-1。
It is worth noting that, searching L_meas using binary chop0Immediate standard L up and down During value, if only existing and L_meas0Immediate one upper standard L value is (in table 1 only Compare L_meas0Big L values, do not compare L_meas0Small L values), then can be by standard L values on this Corresponding JND values are used as JND0.It is of course also possible to use other algorithms, for example in this case It can be taken from table 1 and L_meas0Immediate two upper standard L values, standard L values on the two Corresponding JND values can determine straight line, then as long as calculating L_meas0In this straight line Upper corresponding JND values, are used as JND0.
If likewise, calculating JNDM-1Process run into table 1 situations of only lower standard L values, Above-mentioned calculating JND can also be referred to0Method, by one or two immediate lower standard L value, with And its corresponding JND values, obtain JNDM-1.It is not added with repeating herein.
Comparatively speaking, compared to substituting into, " formula two " calculates JND0And JNDM-1Method (referred to as Method one), JND is calculated by GSDF meters0And JNDM-1Method (method two) it is more easier, At the same time, the computational accuracy of method two is more relatively low, but has no effect on the implementation of this programme.
Step S103, according to the first JND values and the 2nd JND values, calculate P value sequences corresponding JND value sequences, JND value sequences include the corresponding M JND values of the M P values, are designated as {JND0,JND1,…,JNDM-1}。
It is every in ratio and P value sequences in JND value sequences between the difference of every two neighboring JND values Ratio between the difference of two neighboring P values is identical, is specially：
{P0,P1,…,PM-1In be designated as { △ d per the differences of two neighboring P values1,△d2…,△dM-1, wherein △d1=P1-P0, the like, △ dM-1=PM-1-PM-2。
{JND0,JND1,…,JNDM-1In per two neighboring JND values difference { △ d1′,△d2′…,△d′M-1, wherein △d1'=JND1-JDN0, the like, △ d 'M-1=JNDM-1-JNDM-2。
△ d are needed in the present embodiment1:△d2:…:△dM-1=△ d1′:△d2′:…:△d′M-1.Then, detection means can With according to { P0,P1,…,PM-1Obtain { △ d1,△d2…,△dM-1, and according to △d1:△d2:…:△dM-1=△ d1′:△d2′:…:△d′M-1And JND0And JNDM-1Obtain JND value sequences {JND0,JND1,…,JNDM-1}。
If P value sequences are arithmetic progression, understood according to above-mentioned proportionate relationship in JND value sequences M JND value also constitute arithmetic progression so that means for correcting can be obtained with more easy mode To JND value sequences.Specifically, due to now △ d1'=△ d2'=...=△ d 'M-1=△ d ', therefore, it can Go on a public errand △ d '=(JNDM-1-JND0)/(M-1), if now tolerance is not integer, it can round downwards, Certainly at least one decimal can preferably be retained, so as to according to required accuracy computation；And then can be with JND value sequences are obtained for { JND0,JND0+△d′,JND0+2*△d′,…,JNDM-1}。
If it is worth noting that, JND0It is the minimum value in JND spans, JNDM-1It is JND Maximum in span, then the present embodiment can also obtain P value sequences using above-mentioned formula three Corresponding JND sequences.For example：By taking 256 ranks as an example, if JND0It is the corresponding JND values of P values 0, JNDM-1It is the correspondence JND values of P values 255, then can calculates JND sequences using formula three.
Example, for the medical science display device of 1024 ranks, the N in formula three is 10, if P Value sequence is { 0,1,2,3 ..., 1023 }, then JNDminFor JND0、JNDmaxFor JND1023.Now, the formula Three are equivalent to：
Wherein 1023 >=i >=0.
So as to obtain the JND value sequences of 1024 JND values compositions.It is worth noting that, Due to JND0And JND1023Learn in step s 102, therefore, each JND has been calculated substituting into formula During value, JND can not be also recalculated0And JND1023。
Each JND values are corresponding on GSDF curves in step S104, calculating JND value sequences Luminance standard value, to obtain the standard sequence of the M luminance standard value compositions.
In step s 102, it is to determine JND values by brightness measurements, and this step is by JND Value determines luminance standard value, it is seen that this step is an inverse process.Fig. 7 is still may be referred to (only to mark in figure Go out maximum and minimum value), this step is by abscissa value { JND0,JND1,…,JNDM-1, determine Corresponding ordinate value { L_std0,L_std1,…,L_stdM-1}。
Computational methods can have a variety of, example, can substitute into M JND value respectively above-mentioned " public In formula one ", M luminance standard value is obtained.It is worth noting that, for L_std0And L_stdM-1And Speech, is calculated by this method and obtained, can also make L_std0=L_meas0, L_stdM-1=L_measM-1。
Example again, can from GSDF tables (see it is above-mentioned " table 1 ") in, pass through binary chop Method searches JND0It is immediate up and down standard JND values, then obtain above and below standard JND values it is corresponding Two L values, later in conjunction with linear interpolation algorithm, L_std is obtained by the two L value calculating0；Certainly If small probability from GSDF tables, find JND0Identical JND values, then can directly look for To the corresponding L values of the JND values, L_std is used as0；It can be can obtain using same method His M-1 luminance standard value.It is worth noting that, for L_std0And L_stdM-1For, Ke Yitong Cross this method calculating to obtain, L_std can also be made0=L_meas0, L_stdM-1=L_measM-1。
It is worth noting that, using binary chop JND0It is immediate up and down standard JND values this During one, if only existing and JND0Immediate one upper standard JND value (only compares in table 1 JND0Big JND values), then it can regard the corresponding L values of standard JND values on this as L_std0。 It is of course also possible to use other algorithms, such as can take and JND from table 10On immediate two Standard JND values, the corresponding L values of standard JND values can determine straight line on the two, that As long as calculating JND0Corresponding L values, are used as L_std on this straight line0.
If likewise, running into similar situation during calculating other luminance standard values, can also adopt Use similar algorithm.For example：If calculating L_stdM-1During run into table 1 only lower standard JND The situation of value, can also refer to the above method, by one or two immediate lower standard JND value, And its corresponding L value, obtain L_stdM-1.Specifically repeat no more.
By taking 1024 ranks as an example, the standard sequence preferably obtained in this step is {L_std0,L_std1,…,L_std1023}；By taking 256 ranks as an example, the standard sequence preferably obtained in this step For { L_std0,L_std1,…,L_std255}。
Step S105, in the corresponding relation of measurement sequence and P value sequences, obtain each described bright The corresponding P values of standard value are spent as DDL values, to obtain the DDL sequences of M DDL values composition {DDL0,DDL1,…,DDLM-1}。
First, P value sequences and the corresponding relation of measurement sequence can be obtained by by step S101, should The expression of corresponding relation can be form, function, function curve etc., not limit herein, below with Form represents the corresponding relation, see the table below 2.With medical science display device it is 1024 ranks in table 2 Exemplified by, P value sequences are { 0,1,2,3 ..., 1023 }, and measurement sequence is { L_meas0,L_meas1,…,L_meas1023}。
Table 2
P values L(cd/m2) P values L(cd/m2) P values L(cd/m2) P values L(cd/m2)
0 L_meas0 1 L_meas1 2 L_meas2 3 L_meas3
4 L_meas4 5 L_meas5 6 L_meas6 7 L_meas7
… … … … … … … …
1020 L_meas1020 1021 L_meas1021 1022 L_meas1022 1023 L_meas1023
Secondly, using standard sequence as { L_std0,L_std1,…,L_std1023Exemplified by, i.e., wrapped in standard sequence Containing 1024 values.
In the present embodiment, optionally, to obtain L_std0Corresponding P values, then may be used in table 2 To be searched and L_std from table 2 by binary chop0Immediate brightness measurements up and down, then The corresponding two P values of brightness measurements above and below obtaining, later in conjunction with linear interpolation algorithm, by the two P value calculating obtains L_std0The corresponding P values in table 2.Certainly, if small probability from table 2, Find L_std0Identical brightness measurements, then can directly find the corresponding P of the brightness measurements Value, is used as L_std0The corresponding P values in table 2.It is again optional, to obtain L_std0 Corresponding P values in table 2, then can search and L_std from table 20An immediate brightness measurement Value, and then obtain the corresponding P values of this immediate brightness measurements, can using the P values as L_std0Corresponding P values；Certainly, and if L_std0Immediate brightness measurements have two (namely The L_std0Immediate brightness measurements and L_std up and down0Difference it is equal), then from the two Appoint and take a conduct its is immediate.
Likewise it is possible to using the above method calculate obtain other luminance standard values in table 2 it is corresponding P values.
It is worth noting that, being searched and L_std from table 2 using binary chop0On immediate During lower brightness measurements, if only existing and L_std0Immediate one upper brightness measurements (table Only compare L_std in 20Big L values, do not compare L_std0Small L values), then can will be bright on this The corresponding P values of degree measured value are used as L_std0The corresponding P values in table 2.It is of course also possible to use Other algorithms, for example, can take and L_std from table 2 in this case0Immediate two upper brightness Measured value, the corresponding P values of brightness measurements can determine straight line on the two, then only Calculate L_std0The correspondence P values on this straight line.
Similarly, during this, met if calculating other luminance standard values corresponding P values in table 2 To similar situation, it would however also be possible to employ similar algorithm.For example：For a luminance standard value, if in table Only have the situation of its lower L value in 2, the above method can also be referred to, it is immediate by one or two Lower L values and its corresponding P value, obtain the luminance standard value corresponding P values in table 2, It is not added with being described in detail herein.
Thus it is possible to obtain standard sequence { L_std0,L_std1,…,L_std1023Corresponding one in table 2 P value sequences, the P value sequences include 1024 values, and each another value is equal to DDL values, Therefore the DDL sequences of 1024 DDL values compositions are obtained, { DDL is designated as0,DDL1,…,DDL1023}。 Wherein, subscript identical luminance standard value is corresponding with DDL values.
It should be noted that the DDL values obtained in the present embodiment are preferably integer, if by above-mentioned The DDL values that method is obtained are non-integer, then can be by rounding up, rounding up, take downwards Whole scheduling algorithm is by the DDL value integer, to obtain the immediate integer of DDL values, and as most Whole DDL values.Example, if DDL values are 94.3, it is preferred to use to round up and obtains final DDL values be 94；If DDL values are 94.6, it is preferred to use to round up and obtains final DDL It is worth for 95；If DDL values be 94.5, can use round up obtain final DDL values for 95,94 can also be taken as final DDL values.
Step S106, generation P value sequences and DDL sequences corresponding relation.
P value sequences in step S101 are { P0,P1,…,PM-1, the DDL obtained in step S105 Sequence is { DDL0,DDL1,…,DDLM-1, it is clear that corresponding relation between the two, this implementation can be advised Subscript identical P values are corresponding with DDL values in example.
The corresponding relation of this step can be expressed by a form, naturally it is also possible to by function, curve etc. Expression.The present embodiment (is seen below exemplified by generating and can represent form of the P values with DDL value corresponding relations Table 3), obtained for 1024 rank medical science display devices in table 3.
Table 3
P values DDL values P values DDL values P values DDL values P values DDL values
0 DDL0 1 DDL1 2 DDL2 3 DDL3
4 DDL4 5 DDL5 6 DDL6 7 DDL7
… … … … … … …
1020 DDL1020 1021 DDL1021 1022 DDL1022 1023 DDL1023
Luminance correction device has obtained the corresponding relation of P values and DDL values, can be incited somebody to action by staff The corresponding relation is updated into medical display device.In the present embodiment, it is preferably, is filled by gamma correction Put matching somebody with somebody in the corresponding relation according to the P values after calibrated and DDL values, renewal medical display device Put, can be specifically update medical display device P values into DDL converting unit P values and DDL The mapping table of value, the mapping table is generally stored in medical display device, for example, be stored in medical display In equipment CPU caching.So that medical display device can be entered according to the mapping table after renewal Row display, namely display it is calibrated after brightness.
The scheme that the present embodiment is provided, it is defeated to medical science display device to be corrected by luminance correction device Enter a P value sequences, thus obtain shown by medical science display device to should P value sequences a measurement Brightness sequence, enters one and obtains luminance standard value sequence and luminance standard value sequence correspondence DDL sequences, So as to generate the corresponding relation between P value sequences and DDL sequences.This whole process is by bright Degree means for correcting is carried out according to algorithm pre-set etc. automatically, without artificial exploration, therefore can be with Solve the artificial inefficiency carried out caused by gamma correction, and calibration accuracy rate is not high in the prior art The problem of.
In order to more clearly describe the effect of the program, take a particular example to facilitate understanding below.
The corresponding relation such as table 4 below of the P values that the medical science display device of tentative standard needs and L values, table Numeral in 4 is only citing, to help to understand the intent of the present invention.
Table 4
P values 0 1 2 … 63 … 1022 1023
L values 0.05 0.06 0.07 … 0.82 … 1455 1458
And the corresponding relation such as table 5 below institute of the DDL and L in actual medical science display device to be corrected Show, likewise, the numeral in the table 5 is also only citing, to help to understand the intent of the present invention.
Table 5
DDL 0 1 2 … 69 … 1010 1018
L values 0.03 0.05 0.06 … 0.82 … 1455 1458
The obtained P value sequences of our embodiment of the present invention and the corresponding relation of DDL sequences, can To refer to table 6 below.
Table 6
P values 0 1 2 … 63 … 1022 1023
DDL 1 2 3 … 69 … 1010 1018
So, it is bright when input P value=0 after medical science display device has been reconfigured according to table 6 When spending, DDL=1 is obtained by table 6, and then can be by the corresponding L values (0.05cd/m of DDL=12) Show.Similarly, it is also the same for other P values.
Embodiment two
The detailed process that luminance correction device performs brightness correcting method is had been given by embodiment one. Wherein, luminance correction device can be single processing module (CPU, SOC etc.), can also wrap Containing multiple processing modules, because performing whole detection process in view of single processing module, it can cause The load of the processing module is heavier, therefore, in the present embodiment, is coordinated using host computer and slave computer Mode, to perform brightness correcting method, to reduce the load of host computer.
Host computer can control the operation of slave computer, and slave computer is directly connected with medical science display device, with to Medical science display device inputs control signal.It is worth noting that, medical science display device here is only The equipment for including two units shown in Fig. 1, it may not be a packaged equipment entirety, But the combination of a part or multiple parts.Example, host computer, slave computer and medical science are aobvious Show that equipment can be packaged together or both host computer, slave computer are packaged together, and solely Stand on outside medical science display device.
Host computer and slave computer may each be a processing module, example, host computer can be CPU, SOC etc., slave computer can be FPGA.In the present embodiment, with reference to Fig. 8, with CPU and FPGA Cooperation is completed exemplified by brightness correcting method.
The brightness correcting method for the medical science display device that the present embodiment is provided, may comprise steps of：
Step 1, host computer (CPU) read the correcting process startup that slave computer (FPGA) is sent Information.
Example, CPU reads the DT_OK signals that FPGA is sent, and the signal is used to show correction Stage, therefore calibration phase signal is properly termed as, different schools can be represented with different signal values The positive stage.Example, if DT_OK signals are 2, show that CPU reads correcting process startup Information, at this point it is possible to initially enter automatic correction (the DICOM Auto of medical science display device Detection) flow.
This step is optional step, can also be that CPU actively opens the automatic school of medical science display device Positive flow.
Step 2, host computer (CPU) determine P value sequences, and P value sequences include M P value, { P can be designated as0,P1,…,PM-1, M >=3.
Example, for 256 ranks, then it can appoint between 0~255 and take the P value groups of more than 3 Into P value sequences.For 1024 ranks, then it can appoint between 0 to 1023 and take the P of more than 3 Value composition P value sequences.
It is preferably in the present embodiment, the 1st in Initialize installation P value sequences P values and/or most Latter P value and ordered series of numbers tolerance, the ordered series of numbers tolerance be at least M-1 P value composition etc. A P value of Initialize installation is included in the tolerance of difference series, the M-1 P values.
Optionally, the 1st P value of Initialize installation and ordered series of numbers tolerance.Namely it is meant that CPU can obtain an arithmetic progression out of P values span, wherein, two neighboring P values Difference extremely tolerance.Example, by taking 256 ranks as an example, the 1st P value is 0, and tolerance is 15, P value sequences { 0,15,30 ..., 255 } can then be obtained.
Optionally, last P value of Initialize installation and ordered series of numbers tolerance.Example, with 256 Exemplified by rank, the 1st P value is 255, and tolerance is 15, can still obtain P value sequences { 0,15,30 ..., 255 }.
Optionally, the 1st P value of Initialize installation, last P value and ordered series of numbers tolerance. Example, by taking 1024 ranks as an example, the 1st P value is 0, and last P value is 1023, public Difference is 60, and then can obtain P value sequences { 0,60,120,180 ..., 960,1023 }, or {0,63,123,183,…,963,1023}。
Still more preferably, all P values of P value spans are included in P value sequences, now P Value sequence is arithmetic progression, and tolerance is 1, is specially { 0,1,2,3 ..., (2N- 1) }, wherein, 2NFor The GTG series of the medical science display device.Example, if for 1024 rank medical science display devices Speech, P value sequences are preferably { 0,1,2,3 ..., 1023 }.
CPU can get whole P values at this moment, can also first determine a P value, wait to hold Go after the circulation of a step 3- step 6, then determined next P values.
Step 3, host computer (CPU) send a P values to slave computer (FPGA), so as to FPGA Medical science display device is given by P values output.
Example, CPU is sent to FPGA according to the order from small to large in P value sequences, this Step can first send the 1st P values P in P value sequences0。
Optionally, as described in embodiment one, the sensor for gathering brightness measurements is aobvious positioned at medical science Show in a certain viewing area of equipment, at this point it is possible to only allow the viewing area to be shown according to the P values, Other regions can arbitrarily be set.In this case, while CPU sends a P values to FPGA, The positional information of the viewing area of medical science display device can also be sent to FPGA by CPU, so as to FPGA control medical science display devices are shown in the viewing area according to the P values.
FPGA controls control medical science display device is in viewing area (region for setting sensor) display The mode of the corresponding picture of the P values may be referred to embodiment one, for example, can be by FPGA only P value matrixs are generated according to P values or according to P values and the positional information of viewing area, FPGA will The P value matrixs are sent to medical science display device.In another example, FPGA can be only by P values or by P Value and the positional information of viewing area issue medical science display device, and P value squares are generated by medical science display device Battle array, and shown according to the P value matrixs.
After step 4, slave computer (FPGA) export P values to medical science display device, to host computer (CPU) feedback P values successfully send information, and it is corresponding bright that host computer (CPU) reads the P values Spend measured value.
Example, CPU reads p_finish signals, and the signal is used to show data transmission state, because This is properly termed as data transmission state signal, and different transmission shapes can be represented with different signal values State.For example, CPU reads p_finish signals from FPGA, until when p_finish signals are 2, Then mean that CPU reads FPGA P values and is successfully transmitted information, now show FPGA By P values (P0) issue medical science display device.And then, medical science display device can be according to P values (P0) Shown.
Due to being provided with sensor on the display screen of medical science display device, and then sensor collects brightness Measured value, now CPU the brightness measurements, such as P are read from sensor0All corresponding brightness Measured value is L_meas0。
Step 5, host computer (CPU) send the corresponding brightness of P values to slave computer (FPGA) and surveyed Value.
In order to ensure that FPGA can obtain the brightness measurements that CPU is obtained in this circulation, preferably , CPU is read after brightness measurements, and brightness readable instruction is sent and described to FPGA Brightness measurements, when receiving brightness readable instruction so as to FPGA, receive brightness measurements.
Example, CPU can send LS_EN signals to FPGA, and the signal value is used to represent Whether brightness measurements are readable, therefore are properly termed as readable indication signal.When CPU reads brightness Measured value (such as L_meas0) after, can to FPGA send signal value for 1 LS_EN signals and Brightness measurements (such as L_meas0).Certainly, if CPU does not read new brightness measurements, Then the signal value of the LS_EN signals is 0.
It should be noted that CPU only can send brightness measurements to FPGA here, further P values can also be sent to FPGA, for example, CPU sends array (P to FPGA0, L_meas0)。
Step 6, slave computer (FPGA) receive brightness measurements or the number comprising the brightness measurements After group, information can be properly received to host computer (CPU) feedback data.
Example, FPGA receives L_meas0Or array (P0, L_meas0) after, returned to CPU Signal value is 1 p_finish signals, to show that FPGA has been successfully received related data, letter Number value is that the data are properly received information for 1 p_finish signals, for indicating that FPGA has been received Brightness measurements.Even if it should be noted that this step of FPGA only receives L_meas0, also can root L_meas is determined according to the sequencing of transmission0Corresponding P0。
The data that host computer (CPU) reads slave computer (FPGA) transmission are properly received after information, Circulation step 3-6, to send next P values to slave computer (FPGA).For example, for the first time In circulation, CPU sends P to FPGA0, and it is properly received letter in the data for receiving FPGA feedbacks Start to circulate for second after breath；In second circulates, CPU sends P to FPGA1, and receiving It is properly received to the FPGA data fed back after information and starts third time and circulate, until CPU is to FPGA Send m-th P value (last P values, PM-1), and FPGA is read for PM-1Send Data be properly received information untill.
Specific in the present embodiment, the sum that CPU sends P values is M, and M >=3 perform 18 The circulation of secondary step 3- steps 6.The M for example can be 1024.Perform after circulation, FPGA The measurement sequence of 1024 brightness measurements compositions is just got {L_meas0,L_meas1,…,L_meas1023}。
Step 7, host computer (CPU) send data to slave computer (FPGA) and send END instruction.
Example, CPU sends CPU_END letters after last time circulation terminates to FPGA Number (i.e. data send END instruction), with show CPU be not sent further on new brightness measurements to FPGA.FPGA receives data and sent after END instruction, can proceed by step 8.
This step is optional step, and example can also be counted by FPGA, when counting reaches M, Start the survey that P value sequences are constituted with the M brightness measurements constituted according to the M P values Retrieval DDL sequences are measured, that is, carry out step 8.
P value sequences and M that step 8, slave computer (FPGA) are constituted according to the M P values The measurement retrieval DDL sequences of the individual brightness measurements composition, are designated as {DDL0,DDL1,…,DDLM-1}。
This step may be referred to the step S102- step S105 in embodiment one, be not added with repeating herein. Wherein, M in M DDL value and P value sequences in the DDL sequences that FPGA is obtained P values are corresponded, so that FPGA can generate the corresponding relation of DDL sequences and P value sequences, This corresponding relation can be expressed by form (see above-mentioned table 3), function etc..
Certainly, the implementation method of this step also can not limited to this.No matter which kind of bearing calibration is used, only To need to obtain measurement sequence in the bearing calibration, it is possible to pass through host computer in reference the present embodiment The mode for obtaining measurement sequence is cooperateed with slave computer.
Step 9, slave computer (FPGA) send DDL sequences or institute to host computer (CPU) State the corresponding relation of P value sequences and the DDL sequences.
Specifically, FPGA to CPU send DDL sequences, CPU after DDL sequences are received, With reference to the P value sequences that FPGA is issued before it, it is possible to generate P value sequences and DDL sequences Corresponding relation.Or, FPGA sends P value sequences and the corresponding relation of DDL sequences to CPU, Now CPU directly obtains the corresponding relation.
It is preferred in the present embodiment in order to allow FPGA in the light of actual conditions to be fed back, FPGA Signal is completed to CPU feedback compensations flow, the correcting process completes signal and includes the first mark or the Two marks, first identifies for indicating that correction result is normal, and second identifies for indicating that correction result is different Often；For example：It still can be above-mentioned DT_OK signals, DT_OK that the correcting process, which completes signal, Signal shows that the correction result of medical science display device is normal for 1, and DT_OK signals show medical science for 0 The correction results abnormity of display device.
Signal is completed based on the correcting process, this step can be specifically when CPU reads correction stream When journey completes signal comprising the first mark (i.e. DT_OK signals are 1), DDL is read from FPGA Sequence or P value sequences and the corresponding relation of DDL sequences.Further, CPU can also connect Connect a display screen, now CPU control display screens show medical science display device automatic correcting process into The mark of work(.Further, the corresponding relation of M DDL value and M P value can also be shown (for example being shown with mapping sheet form).So, staff can be convenient to by the corresponding relation, It is configured in medical science display device.It is of course also possible to by luminance correction device to perform configuration the step of, Refer to following step 10.
Further, can be to if the correction results abnormity that FPGA is obtained by certain reason CPU feedback signal values are 0 DT_OK signals, and now, CPU is received after the signal, control Display screen shows the mark of the automatic correcting process failure of medical science display device.
The corresponding relation of P value sequences and DDL sequences is configured to by step 10, host computer (CPU) In medical display device.
Example, CPU can will can express the mapping table of P value sequences and DDL sequence corresponding relations (such as table 3), is stored in the P values of medical display device to DDL converting unit (P-Values to DDLs, can be according to newly configuring so that medical display device can receive P-Values in) Mapping table finds DDLs, and then realizes the display after correction.
According to foregoing description, it is known that this step is optional step.It can also be that staff artificially incites somebody to action To corresponding relation be configured in medical display device.
Scheme provided in an embodiment of the present invention, is engaged using host computer and slave computer, to complete medical science The automatic correcting process of display device.Compared to the method for performing the flow by a processing module, energy The flow is enough more quickly completed, and reduces by one to complete the load of whole flow process.
Embodiment three
The present embodiment additionally provides a kind of detection means of medical science display device luminosity response error rate, closes Embodiment one is may be referred in the description of the detection means, to perform the method described in embodiment one.
As shown in figure 9, present embodiments providing a kind of luminance correction device of medical science display device, wrap Include：
Output module 21, for inputting P value sequences to medical science display device；
Receiving module 22, for obtaining the corresponding measurement sequence of the P value sequences, the P values sequence Row include M P value, and the measurement sequence includes the corresponding M brightness measurement of the M P values Value, the M brightness measurements include the first brightness measurements and the second brightness measurements, M >=3；
Processing module 23, is surveyed for calculating first brightness measurements and second brightness respectively Value corresponding first JND values and the 2nd JND on GTG standardized display function GSDF curves Value；According to the first JND values and the 2nd JND values, the P value sequences are calculated corresponding JND value sequences, the JND value sequences include the corresponding M JND values of the M P values, And the ratio between the difference in the JND value sequences per two neighboring JND values and the P values sequence The ratio between difference in row per two neighboring P values is identical；Calculate every in the JND value sequences Individual JND values corresponding luminance standard value on GSDF curves, to obtain the M luminance standards It is worth the standard sequence of composition；In corresponding relation of the measurement sequence with the P value sequences, obtain Each the corresponding P values of the luminance standard value are as DDL values, to obtain M DDL values composition DDL sequences；Generate the corresponding relation of the P value sequences and the DDL sequences.
A kind of optional scheme is that first brightness measurements are P minimum in the P value sequences Value PminCorresponding brightness measurements, second brightness measurements are maximum in the P value sequences P values PmaxCorresponding brightness measurements.
A kind of optional scheme is that the P value sequences are { 0,1,2,3 ..., (2N- 1) }, wherein, 2NFor The GTG series of the medical science display device.
A kind of exemplary scheme is, output module 21, the receiving module of above-mentioned luminance correction device 22 and processing module 23 connected by bus, and luminance correction device can also include with this it is total Memory module of line connection etc..
Wherein, it can be preserved in a storage module for performing the program code of the present invention program, and by Processing module 23 come control perform.
Memory module can include volatile storage module (English full name：Volatile memory), Such as random access memory module (English full name：Random-access memory, English abbreviation： RAM).Memory module can also include non-volatile memory modules (English full name：non-volatile Memory), for example read-only memory module (English full name：Read-only memory, English letter Claim：ROM), flash module (English full name：Flash memory), (English is complete for hard disk Claim：Hard disk drive, English abbreviation：) or solid state hard disc (English full name HDD：solid-state Drive, English abbreviation：SSD).Memory module can also include the group of the memory module of mentioned kind Close.
Processing module 23 can be CPU (full name：Central Processing Unit, Referred to as：CPU), or CPU and hardware chip combination.Above-mentioned hardware chip can be special Integrated circuit (English full name：Application-specific integrated circuit, English abbreviation： ASIC), PLD (English full name：Programmable logic device, English Referred to as：PLD) or its any combination.
Output module 21 and receiving module 22 can include interface, the interface electricity for data transfer Road etc..
Those of ordinary skill in the art are it is to be appreciated that with reference to the embodiments described herein description The unit and algorithm steps of each example, can be with electronic hardware or computer software and electronic hardware Combination realize.These functions are performed with hardware or software mode actually, depending on technical side The application-specific and design constraint of case.Professional and technical personnel can make to each specific application Described function differently is realized, but this is realized it is not considered that beyond the model of the present invention Enclose.
It is apparent to those skilled in the art that, it is for convenience and simplicity of description, above-mentioned The specific work process of the system of description, device and unit, may be referred in preceding method embodiment Corresponding process, will not be repeated here.
In several embodiments provided herein, it should be understood that disclosed system, equipment And method, it can realize by another way.For example, equipment (device) described above is real It is only schematical to apply example, for example, the division of the unit (module), only a kind of logic Function divide, can have other dividing mode when actually realizing, such as multiple units (module) or Component can combine or be desirably integrated into another system, or some features can be ignored, or not hold OK.Another, shown or discussed coupling or direct-coupling or communication connection each other can be with It, by some interfaces, the INDIRECT COUPLING or communication connection of equipment or unit (module), can be electricity to be Property, mechanical or other forms.
The unit as separation (module) part description can be or may not be physically Separated, the part shown as unit can be or may not be physical location, you can with position In a place, or it can also be distributed on multiple NEs.It can select according to the actual needs Some or all of unit therein is selected to realize the purpose of this embodiment scheme.
In addition, each functional unit in each embodiment of the invention can be integrated in a processing unit In or unit be individually physically present, can also two or more units be integrated in In one unit.
If the function is realized using in the form of SFU software functional unit (module) and is used as independent product Sale in use, can be stored in a computer read/write memory medium.Based on such reason Solution, part or the skill that technical scheme substantially contributes to prior art in other words The part of art scheme can be embodied in the form of software product, and the computer software product is stored in In one storage medium, including some instructions are to cause a computer equipment (can be personal meter Calculation machine, server, or network equipment etc.) perform the whole of each of the invention embodiment methods described Or part steps.
Example IV
As shown in Figure 10, the present embodiment additionally provides a kind of luminance correction device of medical science display device, Including：Host computer 31 and slave computer 32；Wherein,
The host computer 31 is used to send a P values to slave computer 32；
The slave computer 32 is used for after the P values are exported to medical science display device, to described upper The feedback P values of machine 31 successfully send information；
The host computer 31 is additionally operable to and sends the corresponding brightness of the P values to the slave computer 32 Measured value；
The data that the host computer 31 is additionally operable to read the transmission of slave computer 32 are properly received information Afterwards, circulate to the slave computer 32 and send next P values, until the host computer 31 is read Untill the data that the slave computer 32 is sent for last P value are properly received information, the number It is used to indicate that the slave computer 32 has received the brightness measurements according to information is properly received；
The slave computer 32 is additionally operable to the P value sequences constituted according to the M P values and M institute The measurement retrieval DDL sequences of brightness measurements composition are stated, and institute is sent to the host computer 31 DDL sequences or the P value sequences and the corresponding relation of the DDL sequences are stated, so as to described Host computer 31 obtains the corresponding relation of the P value sequences and the DDL sequences.
A kind of optional scheme is that host computer 31 is additionally operable to reading the correction stream that slave computer 32 is sent After Cheng Qidong information, before a P values are sent to slave computer 32, the 1st P value of Initialize installation, And ordered series of numbers tolerance, the ordered series of numbers tolerance is the tolerance for the arithmetic progression that the M P values are constituted.
Further, the P value sequences are { 0,1,2,3 ..., (2N- 1) }, wherein, 2NFor the doctor Learn the GTG series of display device.
A kind of optional scheme is that the host computer 31 is specifically for reading the brightness measurement After value, brightness readable instruction and the brightness measurements are sent to the slave computer 32, so as to The slave computer 32 receives the brightness measurements when receiving the brightness readable instruction.
A kind of alternative is, the host computer 31 is additionally operable to be directed to reading the slave computer 32 The data that last P value is sent are properly received after information, and sending data to slave computer 32 sends END instruction, so that the slave computer starts the P value sequences and M according to the M P values compositions The measurement retrieval DDL sequences of the individual brightness measurements composition.
A kind of optional scheme is that slave computer 32 is additionally operable to complete to the feedback compensation flow of host computer 31 Signal；The correcting process completes signal and includes the first mark or the second mark, and first mark is used In indicating that correction result is normal, described second identifies for indicating correction results abnormity；
Accordingly, the host computer 31 is specifically for reading the correcting process completion signal bag During containing the described first mark, the DDL sequences or the P values are read from the slave computer 32 The corresponding relation of sequence and the DDL sequences.
A kind of optional scheme is that host computer 31 is additionally operable to sending a P values to slave computer 32 Meanwhile, the positional information of the viewing area of the medical science display device is also sent to the slave computer 32, so as to the slave computer 32, to control the medical science display device to be shown in the viewing area described The corresponding picture of P values.
The luminance correction device that the present embodiment is provided, completes brightness by host computer and slave computer collaboration and surveys The acquisition of value, and the acquisition of DDL sequences is further completed by slave computer, so as to subtract The load of light host computer.
The foregoing is only a specific embodiment of the invention, but protection scope of the present invention not office Be limited to this, any one skilled in the art the invention discloses technical scope in, can Change or replacement are readily occurred in, should be all included within the scope of the present invention.Therefore, it is of the invention Protection domain described should be defined by scope of the claims.

Claims (12)

1. a kind of brightness correcting method of medical science display device, it is characterised in that including：
P value sequences are exported to medical science display device, to obtain the corresponding measurement sequence of the P value sequences, The P value sequences include M P value, and the measurement sequence includes the corresponding M of the M P values Individual brightness measurements, the M brightness measurements include the first brightness measurements and the second brightness measurement Value, M >=3；
It is aobvious in GTG standardization that first brightness measurements and second brightness measurements are calculated respectively Show corresponding first JND values and the 2nd JND values on function GSDF curves；
According to the first JND values and the 2nd JND values, the P value sequences are calculated corresponding JND value sequences, the JND value sequences include the corresponding M JND values of the M P values, and In the ratio and the P value sequences between difference in the JND value sequences per two neighboring JND values The ratio between difference per two neighboring P values is identical；
Calculate each JND values corresponding luminance standard on GSDF curves in the JND value sequences Value, to obtain the standard sequence of the M luminance standard value compositions；
In corresponding relation of the measurement sequence with the P value sequences, each luminance standard is obtained Corresponding P values are as DDL values in value, to obtain the DDL sequences of M DDL values composition；
Generate the corresponding relation of the P value sequences and the DDL sequences.
2. detection method according to claim 1, it is characterised in that first brightness measurement It is worth for P values P minimum in the P value sequencesminCorresponding brightness measurements, second brightness measurement It is worth for P values P maximum in the P value sequencesmaxCorresponding brightness measurements.
3. detection method according to claim 1 or 2, it is characterised in that the P value sequences For { 0,1,2,3 ..., (2N- 1) }, wherein, 2NFor the GTG series of the medical science display device.
4. a kind of brightness correcting method of medical science display device, it is characterised in that including：
Host computer sends a P values to slave computer；
After the slave computer exports the P values to medical science display device, P is fed back to the host computer Value successfully sends information；
The host computer reads and sends the corresponding brightness measurements of the P values to the slave computer；
The data that the host computer reads the slave computer transmission are properly received after information, are circulated to described Slave computer sends next P values, until the host computer reads the slave computer for last P Untill the data that value is sent are properly received information, the data, which are properly received information, to be used to indicate the bottom Machine has received the brightness measurements, and the sum that the host computer sends P values is M, M >=3；
P value sequences and the M brightness measurements that the slave computer is constituted according to the M P values The measurement retrieval DDL sequences of composition, and to the host computer send the DDL sequences or The P value sequences and the corresponding relation of the DDL sequences, so that the host computer obtains the P values The corresponding relation of sequence and the DDL sequences.
5. method according to claim 4, it is characterised in that in the host computer to slave computer Send before a P values, methods described also includes：
Host computer is read after the correcting process startup information that slave computer is sent, the 1st P of Initialize installation Value and ordered series of numbers tolerance, the ordered series of numbers tolerance are the tolerance for the arithmetic progression that the M P values are constituted.
6. method according to claim 5, it is characterised in that the P value sequences are { 0,1,2,3 ..., (2N- 1) }, wherein, 2NFor the GTG series of the medical science display device.
7. method according to claim 4, it is characterised in that the host computer is read and to institute Stating the corresponding brightness measurements of the slave computer transmission P values includes：
The host computer is read after the brightness measurements, and the readable finger of brightness is sent to the slave computer Make and the brightness measurements, so that the slave computer is when receiving the brightness readable instruction, connect Receive the brightness measurements.
8. method according to claim 4, it is characterised in that read institute in the host computer The data that slave computer is stated for the transmission of last P value are properly received after information, and methods described is also wrapped Include：
The host computer sends data to the slave computer and sends END instruction, so that the slave computer starts The measurement sequence that the P value sequences constituted according to the M P values are constituted with the M brightness measurements Obtain DDL sequences.
9. method according to claim 4, it is characterised in that described to be sent to the host computer The DDL sequences or the P value sequences and the corresponding relation of the DDL sequences include：
The slave computer completes signal to the host computer feedback compensation flow；The correcting process completes letter Number comprising the first mark or the second mark, described first identifies for indicating that correction result is normal, and described the Two identify for indicating correction results abnormity；
The host computer is when reading the correcting process completion signal comprising the described first mark, from institute State slave computer and read the DDL sequences or P value sequences pass corresponding with the DDL sequences System.
10. the method according to claim any one of 4-9, it is characterised in that in the host computer While sending a P values to slave computer, the host computer is also by the viewing area of the medical science display device Positional information be sent to the slave computer, so that the slave computer controls the medical science display device in institute State viewing area and show the corresponding picture of the P values.
11. a kind of luminance correction device of medical science display device, it is characterised in that including：
Output module, for inputting P value sequences to medical science display device；
Receiving module, for obtaining the corresponding measurement sequence of the P value sequences, the P value sequences bag M P value is included, the measurement sequence includes the corresponding M brightness measurements of the M P values, The M brightness measurements include the first brightness measurements and the second brightness measurements, M >=3；
Processing module, exists for calculating first brightness measurements and second brightness measurements respectively Corresponding first JND values and the 2nd JND values on GTG standardized display function GSDF curves；According to The first JND values and the 2nd JND values, calculate the corresponding JND values sequence of the P value sequences Row, the JND value sequences include the corresponding M JND values of the M P values, and the JND The ratio and in the P value sequences every adjacent two between difference in value sequence per two neighboring JND values Ratio between the difference of individual P values is identical；Each JND values are calculated in the JND value sequences in GSDF Corresponding luminance standard value on curve, to obtain the standard sequence of the M luminance standard value compositions； In corresponding relation of the measurement sequence with the P value sequences, each luminance standard value pair is obtained The P values answered are as DDL values, to obtain the DDL sequences of M DDL values composition；Generate the P Value sequence and the corresponding relation of the DDL sequences.
12. a kind of luminance correction device of medical science display device, it is characterised in that including：Host computer and Slave computer；Wherein,
The host computer is used to send a P values to slave computer；
The slave computer is used for after the P values are exported to medical science display device, is fed back to the host computer P values successfully send information；
The host computer is additionally operable to and sends the corresponding brightness measurements of the P values to the slave computer；
The data that the host computer is additionally operable to read the slave computer transmission are properly received after information, are circulated Next P values are sent to the slave computer, until the host computer reads the slave computer for last Untill the data that one P value is sent are properly received information, the data, which are properly received information, to be used to indicate institute State slave computer and receive the brightness measurements；
The slave computer is additionally operable to the P value sequences constituted according to the M P values and the M brightness Measurement set into measurement retrieval DDL sequences, and to the host computer send the DDL sequences, Or the P value sequences and the corresponding relation of the DDL sequences, so that the host computer obtains described P value sequences and the corresponding relation of the DDL sequences.
CN201610270178.7A 2016-04-26 2016-04-26 A kind of brightness correcting method and luminance correction device of medical science display device Pending CN107316623A (en)

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Application publication date: 20171103