CN105361898B

CN105361898B - Correction parameter determines method, device and equipment

Info

Publication number: CN105361898B
Application number: CN201510925915.8A
Authority: CN
Inventors: 张连成
Original assignee: Neusoft Medical Systems Co Ltd
Current assignee: Neusoft Medical Systems Co Ltd
Priority date: 2015-12-11
Filing date: 2015-12-11
Publication date: 2019-04-12
Anticipated expiration: 2035-12-11
Also published as: CN105361898A

Abstract

This application discloses correction parameters to determine method, device and equipment, it is corrected applied to auto-exposure control AEC, the described method includes: obtaining the Theoretical Correction parameter of goal systems, the Theoretical Correction parameter be in the linear fit function of the goal systems dependent variable be preset target because of variable element when corresponding argument value, the linear fit function is the default fitting function changed linearly by variable element with default correction parameter；It obtains the goal systems and AEC correction resulting first is carried out because of variable element according to the Theoretical Correction parameter；If described first because variable element and the target are because the error between variable element is in preset error range, it is determined that the Theoretical Correction parameter is target correction parameter of the matching target because of variable element.Number of corrections can be effectively reduced in the embodiment of the present application, is quickly obtained with target because of the matched target correction parameter of variable element, improves correction parameter and determine efficiency.

Description

Correction parameter determines method, device and equipment

Technical field

This application involves parameter correction technical fields more particularly to correction parameter to determine method, device and equipment.

Background technique

Digital radiography (DR, Digital Radiography) equipment because its dose of radiation is small, the quality of image is high, The recall rate of disease and the accuracy of diagnosis are higher and be widely used.DR system auto-exposure control (AEC, Automatic Exposure Control) correction it is most important in the use process of DR system.

Relevant parameter after the exposure of AEC alignment requirements carries out AEC correction within a preset range, to DR system, it usually needs Parameter to be corrected is set repeatedly, is exposed for the parameter to be corrected being arranged every time, whether the relevant parameter after judging exposure In preset range.

Above-mentioned AEC correcting mode is difficult to determine parameter setting number and exposure frequency to be corrected, and exposure frequency is more, and X is penetrated The light exposure of line and time for exposure are more, and it is lower that AEC corrects efficiency.

Summary of the invention

The application provides correction parameter and determines method, device and equipment, and efficiency is lower to solve existing AEC correction asks Topic.

According to the embodiment of the present application in a first aspect, providing a kind of correction parameter determines method, it is applied to automatic exposure control AEC correction processed, which comprises

The Theoretical Correction parameter of goal systems is obtained, the Theoretical Correction parameter is the linear fit letter of the goal systems In number dependent variable be preset target because of variable element when corresponding argument value, the linear fit function is default because of variable element The fitting function changed linearly with default correction parameter；

It obtains the goal systems and AEC correction resulting first is carried out because of variable element according to the Theoretical Correction parameter；

If described first because variable element and the target are because the error between variable element is in preset error range, really The fixed Theoretical Correction parameter is target correction parameter of the matching target because of variable element.

According to the second aspect of the embodiment of the present application, a kind of correction parameter determining device is provided, is applied to automatic exposure control AEC correction processed, described device include:

Theoretical Correction parameter acquisition module, for obtaining the Theoretical Correction parameter of goal systems, the Theoretical Correction parameter For dependent variable in the linear fit function of the goal systems be preset target because of variable element when corresponding argument value, it is described Linear fit function is the default fitting function changed linearly by variable element with default correction parameter；

First because variable element obtains module, carries out AEC according to the Theoretical Correction parameter for obtaining the goal systems Resulting first is corrected because of variable element；

First parameter determination module, for described first because of variable element and the target because the error between variable element exists When in preset error range, determine that the Theoretical Correction parameter is target correction parameter of the matching target because of variable element.

According to the third aspect of the embodiment of the present application, a kind of correction parameter is provided and determines equipment, is applied to automatic exposure control AEC correction processed, comprising:

Processor；For storing the memory of the processor-executable instruction；

Wherein, the processor is configured to:

Using the embodiment of the present application, the application passes through the Theoretical Correction parameter for obtaining goal systems, the goal systems root AEC correction resulting first is carried out because of variable element according to the Theoretical Correction parameter, and described first because of variable element and the mesh Mark because of the error between variable element in preset error range when, determine the Theoretical Correction parameter for match the target because The target correction parameter of variable element, can be effectively reduced number of corrections, be quickly obtained with target because of the matched target school of variable element Positive parameter improves correction parameter and determines efficiency, and then can be applied to AEC correction to improve AEC correction efficiency.

It should be understood that above general description and following detailed description be only it is exemplary and explanatory, not The application can be limited.

Detailed description of the invention

The drawings herein are incorporated into the specification and forms part of this specification, and shows the implementation for meeting the application Example, and together with specification it is used to explain the principle of the application.

Figure 1A is one embodiment flow chart that the application correction parameter determines method；

Figure 1B is correction parameter and the actual curve relation schematic diagram because of variable element in the application；

Fig. 1 C is the schematic diagram for the linear fit function that the application correction parameter determines method；

Fig. 2A is another embodiment flow chart that the application correction parameter determines method；

Fig. 2 B is the schematic diagram for the second correction parameter that the application correction parameter determines method；

Fig. 3 A is another embodiment flow chart that the application correction parameter determines method；

Fig. 3 B is that the application correction parameter determines the third correction parameter of method and the schematic diagram of the 4th correction parameter；

Fig. 4 is the embodiment hardware architecture diagram of the application correction parameter determining device；

Fig. 5 is one embodiment block diagram of the application correction parameter determining device；

Fig. 6 is another embodiment block diagram of the application correction parameter determining device；

Fig. 7 is another embodiment block diagram of the application correction parameter determining device.

Specific embodiment

It is only to be not intended to be limiting the application merely for for the purpose of describing particular embodiments in term used in this application. It is also intended in the application and the "an" of singular used in the attached claims, " described " and "the" including majority Form, unless the context clearly indicates other meaning.It is also understood that term "and/or" used herein refers to and wraps It may be combined containing one or more associated any or all of project listed.

The application is described in detail combined with specific embodiments below.

Referring to Figure 1A, one embodiment flow chart of method is determined for the application correction parameter, is applied to automatic exposure control AEC correction processed, comprising the following steps:

Step 101: obtaining the Theoretical Correction parameter of goal systems, the Theoretical Correction parameter is the line of the goal systems Property fitting function in dependent variable be preset target because of variable element when corresponding argument value, the linear fit function is default The fitting function changed linearly by variable element with default correction parameter.

Step 102: obtaining the goal systems according to the Theoretical Correction parameter and carry out AEC correction resulting first because becoming Parameter.

Step 103: if described first because variable element and the target are because the error between variable element is in preset error model In enclosing, it is determined that the Theoretical Correction parameter is target correction parameter of the matching target because of variable element.

The present embodiment, by the Theoretical Correction parameter of acquisition goal systems, the goal systems according to the Theoretical Correction Parameter carries out AEC correction resulting first because of variable element, and described first because variable element and the target are because between variable element Error in preset error range when, determine that the Theoretical Correction parameter is target school of the matching target because of variable element Positive parameter, can be effectively reduced number of corrections, is quickly obtained with target because of the matched target correction parameter of variable element, improves correction Parameter determines efficiency, and then can be applied to AEC correction to improve AEC correction efficiency.

The correction parameter of the application determines, can be applied to digital radiography (DR, Digital Radiography) In the auto-exposure control correction course of system, quickly obtain with the target of DR system because of the matched correction parameter of variable element, nothing It needs that correction parameter is arranged repeatedly and DR system is enabled to expose, can greatly improve certainly manually according to different target because of variable element range The correction efficiency and accuracy of dynamic spectrum assignment.

Wherein, for step 101, the goal systems can be DR system, and the default correction parameter can be left for ionisation chamber The ionisation chamber reference voltage of the right field compensation parameter of field compensation parameter, ionisation chamber or KV breakpoint, KV breakpoint is tube voltage breakpoint, described It presets because variable element can be accordingly the mAs feedback quantity of the right field of mAs feedback quantity, ionisation chamber of the left field of ionisation chamber or image averaging ash Degree.Wherein, mA*ms=mAs, mAs abbreviation milliampere-second.

In the present embodiment, the Theoretical Correction parameter for obtaining goal systems can be transferred directly from default storage region deposits in advance The Theoretical Correction parameter of storage, can also generate in real time.The linear fit function can real-time fitting generate, can also be directly from default Storage region is transferred.

In DR system, under identical X-ray bulb voltage, because being positive correlation, such as Figure 1B between variable element and correction parameter Shown, curve g (x) can be for because of the actual curve relationship between variable element and correction parameter.Embodiments herein is by target system System because the relationship between variable element and correction parameter is approximately linear positive correlation, by goal systems because of variable element and correction Parameter carries out linear fit, can get the linear fit function that straight line f (x) as shown in Figure 1 C is goal systems.

In an optional implementation, before the Theoretical Correction parameter for obtaining goal systems, further includes:

Obtain the linear fit function.

Using the target because variable element is as the dependent variable substitution linear fit function, the linear fit function is calculated Argument value.

This implementation can rapidly and accurately obtain the theory that the linear fit argument of function value is goal systems Correction parameter, and then improve target correction parameter constant speed degree really.

It is described to obtain the linear fit function in another optional implementation, comprising:

It is sampling correcting parameter that at least two different correction parameters are chosen within the scope of preset correction parameter.

It obtains the goal systems and the resulting each sampling of AEC correction is carried out because becoming ginseng according to each sampling correcting parameter respectively Number.

To each sampling correcting parameter and each sampling because of variable element progress linear fit, the Linear Quasi of the goal systems is generated Close function.

This implementation can rapidly and accurately obtain the linear fit function of the goal systems.

Wherein, when the default correction parameter is the ionisation chamber reference voltage of KV breakpoint, the correction parameter range can be 0 ~10 volts, when the default correction parameter is the left field compensation parameter of ionisation chamber or ionisation chamber right field compensation parameter, the correction Parameter area can be -100~100.

As shown in Figure 1 C, the abscissa of two points of A, B is respectively sampling correcting parameter, and ordinate is respectively to sample to join because becoming Number.

It, can also be by choosing the linear fit function appointing on straight line in coordinate diagram in other optional implementations It anticipates two coordinate points, the ratio of the ordinate difference and abscissa difference that obtain two coordinate points of selection is that the function is oblique Rate.

For step 102, the AEC correction includes at least one of the field balance correction of KV breakpoint correction and ionisation chamber Correction, the target are preset for judging whether AEC correction by correction parameter is adjusted to target correction because of variable element The critical parameter of parameter.It obtains the goal systems and AEC correction resulting first is carried out because becoming according to the Theoretical Correction parameter The mode of parameter can carry out AEC exposure resulting first because change is joined to obtain the goal systems according to the Theoretical Correction parameter Number, comprising: receive the goal systems using the Theoretical Correction parameter be correction parameter be exposed at image corresponding the One because of variable element, is exposed institute into image pair by correction parameter of the Theoretical Correction parameter or, reading the goal systems First answered is because of variable element.

AEC correction resulting first is carried out because of variable element according to the Theoretical Correction parameter obtaining the goal systems When, the Theoretical Correction parameter can be sent to the control equipment of the goal systems, by the control equipment by the theory Correction parameter is set as the corresponding parametric values of the goal systems, and then controls exposure.

In an optional implementation, the default correction parameter is the left field compensation parameter of ionisation chamber or the right field of ionisation chamber It is described to obtain the goal systems according to Theoretical Correction parameter progress AEC correction resulting first because becoming when compensating parameter Parameter, comprising:

The DR system switching AEC ionisation chamber is obtained to be respective fields and be corresponding field compensation ginseng with the Theoretical Correction parameter Number is exposed the first mAs feedback quantity of resulting respective fields.

Wherein, the respective fields are the right field of ionisation chamber or the left field of ionisation chamber.

It is respective fields in the acquisition DR system switching AEC ionisation chamber and is that respective fields are mended according to the Theoretical Correction parameter It repays parameter to be exposed before the first mAs feedback quantity of resulting respective fields, settable field compensation parameter is 0, and switching is automatic Spectrum assignment ionisation chamber is midfield, is exposed, and records the mAs a reference value that mAs feedback quantity is field compensation.

In another optional implementation, when the default correction parameter is the ionisation chamber reference voltage of KV breakpoint, institute It states and obtains the goal systems according to Theoretical Correction parameter progress AEC correction resulting first because of variable element, comprising:

The DR system is obtained to be exposed by the ionisation chamber reference voltage of corresponding K V breakpoint of the Theoretical Correction parameter First image averaging gray scale of the predeterminable area of resulting image.

Wherein, the predeterminable area can be picture centre region, the corresponding breakpoint be in addition to 50KV breakpoint other are disconnected Point, because needing to adjust potentiometer on high-tension apparatus when correction 50KV breakpoint, other KV breakpoints are based on the potentiometer adjusted Carry out AEC correction.

It is exposed obtaining the DR system by the ionisation chamber reference voltage of corresponding K V breakpoint of the Theoretical Correction parameter Before first image averaging gray scale of the predeterminable area of the resulting image of light, the conditions of exposure and benchmark of settable 50KV breakpoint are joined Voltage is examined, is exposed, and records the image averaging gray scale (average gray of the predeterminable area of image) of image, judges that image is flat Whether equal gray scale is the target average gray of DR system, obtains the DR system if so, entering with the Theoretical Correction parameter For corresponding K V breakpoint ionisation chamber reference voltage be exposed resulting image predeterminable area the first image averaging gray scale Operation, if it is not, the potentiometer of adjustment respective channel, repeated exposure, records the image averaging gray scale of image again, until record Image averaging gray scale is the target average gray.

It, can be by calculating the target because of variable element and the described first difference, difference because of variable element for step 103 The absolute value of value or the difference and the target are because the ratio of variable element obtains the error, the then error and institute Error range is stated, is judged described first because variable element and the target are because whether the error between variable element is in the error range It is interior.When error is the ratio of the difference and the target because of variable element, the error range can be 0 to 10, can also basis Concrete condition is set as other numberical ranges.It can also be true by other the relevant technologies in other optional implementations of the application Fixed described first because variable element and the target are because whether the error between variable element is in the error range.

In the optional implementation of the application, determining that the Theoretical Correction parameter is the matching target because of variable element Target correction parameter after, the relevant parameter of goal systems can be arranged to the Theoretical Correction parameter.

A referring to fig. 2, Fig. 2A are another embodiment flow chart that the application correction parameter determines method, in the method, The step identical as the exemplary process of Figure 1A will be briefly described in the present embodiment, specifically can be in conjunction with referring to for Figure 1A process Detailed description.

Correction parameter shown in Fig. 2A determines that method may comprise steps of:

Step 201: obtaining the Theoretical Correction parameter of goal systems, the Theoretical Correction parameter is the line of the goal systems Property fitting function in dependent variable be preset target because of variable element when corresponding argument value, the linear fit function is default The fitting function changed linearly by variable element with default correction parameter.

Step 202: obtaining the goal systems according to the Theoretical Correction parameter and carry out AEC correction resulting first because becoming Parameter.

Step 203: if described first because variable element and the target are because the error between variable element is in preset error model In enclosing, it is determined that the Theoretical Correction parameter is target correction parameter of the matching target because of variable element.

Step 204: if described first because variable element and the target be not because the error between variable element is in the error model In enclosing, obtains and approach step-length because variable element is corresponding with the Theoretical Correction parameter and described first.

Step 205: calculate the Theoretical Correction parameter and N times for approaching step-length it is being worth and, generate a newest corrections of M Parameter, wherein N is 1 integer for arriving M, and M is the integer more than or equal to 1.

Step 206: it is resulting according to the M newest correction parameters progress AEC corrections respectively to obtain the goal systems M of the corresponding M newest correction parameter are newest because of variable element.

Step 207: judging that M is newest because variable element and the target are because the error between variable element is whether described in respectively In error range.

Step 208: if at least one is newest because variable element and the target are because the error between variable element is in the error In range, by M newest any because in variable element with the target because of the error between variable element in the error range It is newest because of the corresponding newest correction parameter of variable element, be determined as the target correction parameter for matching the target because of variable element.

The present embodiment, described first because variable element and the target be not because the error between variable element is in the error model It is resulting according to the newest correction parameter progress AEC correction by obtaining newest correction parameter and the goal systems when enclosing It is newest because of variable element, and described newest because variable element and the target are because the error between variable element is in the error range When, determine whether corresponding newest correction parameter is the target correction parameter for matching the target because of variable element, be can be effectively reduced Number of corrections is quickly obtained with target because of the matched target correction parameter of variable element, improves correction parameter and determine efficiency, Jin Erti High AEC corrects efficiency.

Wherein, for step 204, can preset the Theoretical Correction parameter and described first because variable element with approach Corresponding relationship or the rule of correspondence between step-length approach step-length according to corresponding relationship or rule of correspondence acquisition.It is described to approach Step-length is as shown in Figure 2 B, the Diff E L between two points of D and C_step, C point abscissa is Theoretical Correction parameter.

It is described to obtain with the Theoretical Correction parameter and described first because variable element is corresponding in an optional implementation Approach step-length, comprising:

Using described first because variable element is as the dependent variable substitution linear fit function, the linear fit function is calculated Argument value be the first correction parameter.

It calculates the difference of the Theoretical Correction parameter and first correction parameter and approaches step-length to be described.

In other optional implementations, can also by the target because variable element with described first because variable element difference Divided by the slope of the linear fit function, obtain described approaching step-length.

It is similar with the specific implementation process of step 102 and 103 for step 206 and step 208.Only with newest correction ginseng It is several and newest because variable element substitutes Theoretical Correction parameter and first because of variable element respectively.

Referring to Fig. 3 A, Fig. 3 A is another embodiment flow chart that the application correction parameter determines method, in the method, The step identical as the exemplary process of Fig. 2A will be briefly described in the present embodiment, specifically can be in conjunction with referring to for Fig. 2A process Detailed description.

Correction parameter shown in Fig. 3 A determines that method may comprise steps of:

Step 301: obtaining the Theoretical Correction parameter of goal systems, the Theoretical Correction parameter is the line of the goal systems Property fitting function in dependent variable be preset target because of variable element when corresponding argument value, the linear fit function is default The fitting function changed linearly by variable element with default correction parameter.

Step 302: obtaining the goal systems according to the Theoretical Correction parameter and carry out AEC correction resulting first because becoming Parameter.

Step 303: if described first because variable element and the target are because the error between variable element is in preset error model In enclosing, it is determined that the Theoretical Correction parameter is target correction parameter of the matching target because of variable element.

Step 304: if described first because variable element and the target be not because the error between variable element is in the error model In enclosing, obtains and approach step-length because variable element is corresponding with the Theoretical Correction parameter and described first.

Step 305: calculate the Theoretical Correction parameter and N times for approaching step-length it is being worth and, generate a newest corrections of M Parameter, wherein N is 1 integer for arriving M, and M is the integer more than or equal to 1.

Step 306: it is resulting according to the M newest correction parameters progress AEC corrections respectively to obtain the goal systems M of the corresponding M newest correction parameter are newest because of variable element.

Step 307: judging that M is newest because variable element and the target are because the error between variable element is whether described in respectively In error range.

Step 308: if at least one is newest because variable element and the target are because the error between variable element is in the error In range, by M newest any because in variable element with the target because of the error between variable element in the error range It is newest because of the corresponding newest correction parameter of variable element, be determined as the target correction parameter for matching the target because of variable element.

Step 309: if M is newest because variable element and the target be not because the error between variable element is in the error model In enclosing, obtain it is corresponding it is newest because variable element and the target because variable element difference for opposite adjacent two of symbol most New correction parameter.

Step 310: the median for choosing two adjacent newest correction parameters is third correction parameter.

Step 311: obtaining the goal systems according to the third correction parameter and carry out the resulting third of AEC correction because becoming Parameter.

Step 312: judging the third because variable element and the target are because whether the error between variable element is in the mistake In poor range.

Step 313: if the third is because variable element and the target are because the error between variable element is in the error range It is interior, it is determined that the third correction parameter is target correction parameter of the matching target because of variable element.

The present embodiment, it is newest because variable element and the target be not because the error between variable element is in the error in M When in range, resulting the is exposed with the third correction parameter by obtaining third correction parameter and the goal systems Three because of variable element, and in the third because variable element and the target are because the error between variable element is in the error range When, determine whether the third correction parameter is the target correction parameter for matching the target because of variable element, be can be effectively reduced Number of corrections is quickly obtained with target because of the matched target correction parameter of variable element, improves correction parameter and determine efficiency, Jin Erti High AEC corrects efficiency.

For step 309, as shown in Figure 3B, two adjacent newest correction parameters are the abscissa of point D and E.According to list Letter of transfer number intermediate value theorem can determine that target correction parameter is between point D and point E.

For step 310, third correction parameter is the abscissa of point F shown in Fig. 3 B.

It is similar with the specific implementation process of step 102 and 103 for step 311 and step 313.It is only corrected and is joined with third Several and third substitutes Theoretical Correction parameter and first because of variable element because of variable element respectively.

In an optional implementation, the method also includes:

If the third is not because variable element and the target be because the error between variable element is in the error range, in institute State third because variable element be greater than the target because of variable element when, choose the third correction parameter and two adjacent newest corrections The median of the lesser newest correction parameter of numerical value is the 4th correction parameter in parameter.

When the third is less than the target because of variable element because of variable element, the third correction parameter and adjacent is chosen The median of the biggish newest correction parameter of numerical value is the 4th correction parameter in two newest correction parameters.

It obtains the goal systems and is exposed the resulting 4th because of variable element with the 4th correction parameter；

If the described 4th because variable element and the target are because the error between variable element is in the error range, it is determined that 4th correction parameter is target correction parameter of the matching target because of variable element.

Wherein, when the described 4th is greater than the target because of variable element because of variable element, the abscissa of point G shown in Fig. 3 B For the 4th correction parameter.

Further, if the described 4th because variable element and the target be not because the error between variable element is in the error model In enclosing, when the described 4th is less than the target because of variable element because of variable element, the 4th correction parameter and third correction parameter are judged Spacing whether be less than preset minimum step, if being less than, terminate target correction parameter determination, if being not less than, described in selection The median of 4th correction parameter and third correction parameter is the 5th correction parameter, obtains the goal systems with the 5th school Positive parameter is exposed the resulting 5th because of variable element, if the described 5th because variable element and the target are because of the mistake between variable element Difference is in the error range, it is determined that the 5th correction parameter is the matching target because the target correction of variable element is joined Number.

Wherein, the 5th correction parameter can be the abscissa of the H point in Fig. 3 B.

In other optional implementations, principle can be chosen according to the correction parameter of above embodiment, choose other numbers The median for being worth section is the 5th because of variable element.

Corresponding with the embodiment of aforementioned corrected parameter determination method, present invention also provides correction parameter determining devices Embodiment.

The embodiment of the application correction parameter determining device can be applied in the equipment of DR system or the automatic exposure of other needs In the equipment of photocontrol.Installation practice can be by software realization, can also be by way of hardware or software and hardware combining It realizes.It taking software implementation as an example, is by the equipment of DR system where it or other need as the device on a logical meaning Want the processor of the equipment of auto-exposure control that computer program instructions corresponding in memory are read into memory operation shape At.For hardware view, as shown in figure 4, for the equipment of DR system where the application correction parameter determining device or other A kind of hardware structure diagram for needing the equipment of auto-exposure control, in addition to processor shown in Fig. 4, memory, network interface and Except memory, the equipment of the DR system in embodiment where device or other need the equipment of auto-exposure control generally according to The actual functional capability of the equipment can also include other hardware, repeat no more to this.

Wherein, it can store correction parameter in memory and determined the corresponding logical order of method, which for example may be used To be nonvolatile memory (non-volatile memory).Processor, which can call, executes patrolling for the preservation in memory Instruction is collected, method is determined with the correction parameter for executing above-mentioned.

If correction parameter determines that the function of the corresponding logical order of method is realized in the form of SFU software functional unit and makees It is independent product when selling or using, can store in a computer readable storage medium.Based on this understanding, Substantially the part of the part that contributes to existing technology or the technical solution can be in other words for the technical solution of the application It is expressed in the form of software products, which is stored in a storage medium, including some instructions are used So that a computer equipment (can be personal computer, server or the network equipment etc.) executes each reality of the present invention Apply all or part of the steps of the method.And storage medium above-mentioned includes: USB flash disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), magnetic or disk Etc. the various media that can store program code.

Referring to Fig. 5, Fig. 5 is the application correction parameter determining device one embodiment block diagram:

The device includes: Theoretical Correction parameter acquisition module 510, first because variable element obtains module 520 and the first parameter Determining module 530.

Wherein, Theoretical Correction parameter acquisition module 510, for obtaining the Theoretical Correction parameter of goal systems, the theory Correction parameter be in the linear fit function of the goal systems dependent variable be preset target because of variable element when it is corresponding from become Magnitude, the linear fit function are the default fitting function changed linearly by variable element with default correction parameter.

First, because variable element obtains module 520, carries out for obtaining the goal systems according to the Theoretical Correction parameter AEC correction resulting first is because of variable element.

First parameter determination module 530, for described first because variable element and the target are because of the mistake between variable element When difference is in preset error range, determine that the Theoretical Correction parameter is the matching target because the target correction of variable element is joined Number.

The present embodiment is joined by the Theoretical Correction parameter of acquisition goal systems, the goal systems with the Theoretical Correction Number is exposed resulting first because of variable element, and described first because variable element and the target are because of the error between variable element When in preset error range, determine that the Theoretical Correction parameter is the matching target because the target correction of variable element is joined Number, can be effectively reduced number of corrections, is quickly obtained with target because of the matched target correction parameter of variable element, improves correction parameter It determines efficiency, and then can be applied to AEC correction to improve AEC correction efficiency.

In an optional implementation:

Correction parameter determining device may also include and (be not shown in Fig. 5):

Function obtains module, for obtaining the linear fit function.

Argument value computing module is used for the target because variable element is as the dependent variable substitution linear fit letter Number, calculates the linear fit argument of function value.

In another optional implementation:

The function, which obtains module, may also include and (be not shown in Fig. 5):

Sampling correcting parameter acquisition module, for choosing at least two different corrections within the scope of preset correction parameter Parameter is sampling correcting parameter.

Sampling is carried out according to each sampling correcting parameter because variable element obtains module for obtaining the goal systems respectively The resulting each sampling of AEC correction is because of variable element.

Linear fit module, for, because of variable element progress linear fit, generating institute to each sampling correcting parameter and each sampling State the linear fit function of goal systems.

In another optional implementation, the default correction parameter is the left field compensation parameter of ionisation chamber, ionisation chamber The ionisation chamber reference voltage of right field compensation parameter or KV breakpoint, the default mAs that mutually should be the left field of ionisation chamber because of variable element are anti- The mAs feedback quantity or image averaging gray scale of the right field of feedback amount, ionisation chamber.

In another optional implementation, the default correction parameter is the left field compensation parameter of ionisation chamber or ionisation chamber When right field compensation parameter, first because variable element obtain module 520 may include (being not shown in Fig. 5):

First mAs feedback quantity obtains module, for obtaining the DR system switching AEC ionisation chamber for respective fields and with described Theoretical Correction parameter is the first mAs feedback quantity that respective fields compensating parameter is exposed resulting respective fields.

In another optional implementation, when the default correction parameter is the ionisation chamber reference voltage of KV breakpoint, First because variable element obtain module 520 may include (being not shown in Fig. 5):

First image averaging gray scale obtains module, for obtaining the DR system using the Theoretical Correction parameter as corresponding K V The ionisation chamber reference voltage of breakpoint is exposed the first image averaging gray scale of the predeterminable area of resulting image.

Referring to Fig. 6, Fig. 6 is another embodiment block diagram of the application correction parameter determining device:

The device includes: that Theoretical Correction parameter acquisition module 610, first is true because variable element obtains module 620, the first parameter Cover half block 630, approach step-length obtain module 640, newest correction parameter obtain module 650, it is newest because variable element obtain module 660, newest because of variable element judgment module 670 and third parameter determination module 680.

Wherein, Theoretical Correction parameter acquisition module 610, for obtaining the Theoretical Correction parameter of goal systems, the theory Correction parameter be in the linear fit function of the goal systems dependent variable be preset target because of variable element when it is corresponding from become Magnitude, the linear fit function are the default fitting function changed linearly by variable element with default correction parameter.

First, because variable element obtains module 620, carries out for obtaining the goal systems according to the Theoretical Correction parameter AEC correction resulting first is because of variable element.

First parameter determination module 630, for described first because variable element and the target are because of the mistake between variable element When difference is in preset error range, determine that the Theoretical Correction parameter is the matching target because the target correction of variable element is joined Number.

Approach step-length and obtain module 640, for described first because variable element and the target are because of the mistake between variable element When difference is not in the error range, obtain with the Theoretical Correction parameter and described first because of the corresponding closed hip twist of variable element It is long.

Newest correction parameter computing module 650 is worth for calculating the Theoretical Correction parameter with N times for approaching step-length Sum, generate M newest correction parameters, wherein N is 1 integer for arriving M, and M is the integer more than or equal to 1.

It is newest because variable element obtains module 660, for obtaining the goal systems respectively according to the newest corrections ginseng of the M The M that number progress AEC corrects the M newest correction parameters of resulting correspondence is a newest because of variable element.

It is newest because of variable element judgment module 670, for judge respectively M it is newest because of variable element with the target because of variable element Between error whether in the error range.

Third parameter determination module 680, for newest because variable element and the target are because between variable element at least one Error in the error range when, by M it is newest because in variable element with the target because the error between variable element is in institute It states any newest because of the corresponding newest correction parameter of variable element in error range, is determined as matching the target because of variable element Target correction parameter.

In an optional implementation:

Approaching step-length and obtaining module 640 may include (being not shown in Fig. 6):

First correction parameter computing module is used for described first because variable element is as the dependent variable substitution linear fit Function, calculating the linear fit argument of function value is the first correction parameter.

Step-length computing module is approached, the difference for calculating the Theoretical Correction parameter and first correction parameter is institute It states and approaches step-length.

Referring to Fig. 7, Fig. 7 is another embodiment block diagram of the application correction parameter determining device:

The device includes: that Theoretical Correction parameter acquisition module 701, first is true because variable element obtains module 702, the first parameter Cover half block 703, approach step-length obtain module 704, newest correction parameter obtain module 705, it is newest because variable element obtain module 706, newest because variable element judgment module 707, third parameter determination module 708, adjacent parameter obtain module 709, third correction Parameter acquisition module 710, third are because variable element acquisition module 711, third are because of variable element judgment module 712 and the determination of the 4th parameter Module 713.

Wherein, Theoretical Correction parameter acquisition module 701, for obtaining the Theoretical Correction parameter of goal systems, the theory Correction parameter be in the linear fit function of the goal systems dependent variable be preset target because of variable element when it is corresponding from become Magnitude, the linear fit function are the default fitting function changed linearly by variable element with default correction parameter.

First, because variable element obtains module 702, carries out for obtaining the goal systems according to the Theoretical Correction parameter AEC correction resulting first is because of variable element.

First parameter determination module 703, for described first because variable element and the target are because of the mistake between variable element When difference is in preset error range, determine that the Theoretical Correction parameter is the matching target because the target correction of variable element is joined Number.

Approach step-length and obtain module 704, for described first because variable element and the target are because of the mistake between variable element When difference is not in the error range, obtain with the Theoretical Correction parameter and described first because of the corresponding closed hip twist of variable element It is long.

Newest correction parameter computing module 705 is worth for calculating the Theoretical Correction parameter with N times for approaching step-length Sum, generate M newest correction parameters, wherein N is 1 integer for arriving M, and M is the integer more than or equal to 1.

It is newest because variable element obtains module 706, for obtaining the goal systems respectively according to the newest corrections ginseng of the M The M that number progress AEC corrects the M newest correction parameters of resulting correspondence is a newest because of variable element.

It is newest because of variable element judgment module 707, for judge respectively M it is newest because of variable element with the target because of variable element Between error whether in the error range.

Third parameter determination module 708, for newest because variable element and the target are because between variable element at least one Error in the error range when, by M it is newest because in variable element with the target because the error between variable element is in institute It states any newest because of the corresponding newest correction parameter of variable element in error range, is determined as matching the target because of variable element Target correction parameter.

Adjacent parameter obtains module 709, for newest because variable element and the target are because of the error between variable element in M When not in the error range, obtain corresponding newest because variable element and the target are because the difference of variable element is symbol The opposite newest correction parameter of adjacent two.

Third correction parameter obtains module 710, and the median for choosing two adjacent newest correction parameters is third Correction parameter.

Third is carried out for obtaining the goal systems according to the third correction parameter because variable element obtains module 711 AEC corrects resulting third because of variable element.

Third because of variable element judgment module 712, for judge the third because variable element and the target because variable element it Between error whether in the error range.

4th parameter determination module 713, in the third because variable element and the target are because of the mistake between variable element When difference is in the error range, determine that the third correction parameter is the matching target because the target correction of variable element is joined Number.

In an optional implementation:

Correction parameter determining device may also include and (be not shown in Fig. 7):

First chooses module, in the third because variable element and the target be not because the error between variable element is in institute State in error range, and the third because variable element be greater than the target because of variable element when, choose the third correction parameter with The median of the lesser newest correction parameter of numerical value is the 4th correction parameter in two adjacent newest correction parameters.

Second chooses module, in the third because variable element and the target be not because the error between variable element is in institute State in error range, and the third because variable element be less than the target because of variable element when, choose the third correction parameter with The median of the biggish newest correction parameter of numerical value is the 4th correction parameter in two adjacent newest correction parameters.

4th, because variable element obtains module, is exposed institute for obtaining the goal systems with the 4th correction parameter The 4th obtained is because of variable element.

5th parameter determination module, for the described 4th because of variable element and the target because the error between variable element exists When in the error range, determine that the 4th correction parameter is target correction parameter of the matching target because of variable element.

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.

For device embodiment, since it corresponds essentially to embodiment of the method, so related place is referring to method reality Apply the part explanation of example.The apparatus embodiments described above are merely exemplary, wherein described be used as separation unit The module of explanation may or may not be physically separated, and the component shown as module can be or can also be with It is not physical unit, it can it is in one place, or may be distributed over multiple network units.It can be according to actual The purpose for needing to select some or all of the modules therein to realize application scheme.Those of ordinary skill in the art are not paying Out in the case where creative work, it can understand and implement.

Those skilled in the art after considering the specification and implementing the invention disclosed here, will readily occur to its of the application Its embodiment.This application is intended to cover any variations, uses, or adaptations of the application, these modifications, purposes or Person's adaptive change follows the general principle of the application and including the undocumented common knowledge in the art of the application Or conventional techniques.The description and examples are only to be considered as illustrative, and the true scope and spirit of the application are by following Claim is pointed out.

It should be understood that the application is not limited to the precise structure that has been described above and shown in the drawings, and And various modifications and changes may be made without departing from the scope thereof.Scope of the present application is only limited by the accompanying claims.

Claims

1. a kind of correction parameter determines method, it is applied to auto-exposure control AEC and corrects, which is characterized in that the described method includes:

The Theoretical Correction parameter of goal systems is obtained, the Theoretical Correction parameter is in the linear fit function of the goal systems Dependent variable be preset target because of variable element when corresponding argument value, the linear fit function is default because variable element is with pre- If the fitting function that correction parameter changes linearly；The linear fit function are as follows: the difference within the scope of preset correction parameter Correction parameter, according to different correction parameters carrying out AEC from the goal systems, to correct resulting each sampling linear because of variable element Fitting result；

If described first because variable element and the target are because the error between variable element is in preset error range, it is determined that institute Stating Theoretical Correction parameter is target correction parameter of the matching target because of variable element.

2. the method according to claim 1, wherein the method also includes:

If described first because variable element and the target be not because the error between variable element is in the error range, obtain and institute It states Theoretical Correction parameter and described first and approaches step-length because variable element is corresponding；

Calculate the Theoretical Correction parameter and N times for approaching step-length it is being worth and, generate a newest correction parameters of M, wherein N The integer for arriving M for 1, M are the integer more than or equal to 1；

It obtains the goal systems and carries out resulting the correspondence M of AEC correction most according to the M newest correction parameters respectively M of new correction parameter are newest because of variable element；

Judge that M is newest because variable element and the target are because the error between variable element is whether in the error range respectively；

If at least one is newest because variable element and the target are because the error between variable element is in the error range, by M It is newest because in variable element with the target because the error between variable element is any newest because of variable element in the error range Corresponding newest correction parameter is determined as the target correction parameter for matching the target because of variable element.

3. according to the method described in claim 2, it is characterized in that, the acquisition and the Theoretical Correction parameter and described first Step-length is approached because variable element is corresponding, comprising:

Using described first because variable element is as the dependent variable substitution linear fit function, oneself of the linear fit function is calculated Variate-value is the first correction parameter；

4. according to the method described in claim 2, it is characterized in that, the method also includes:

If M is newest because variable element and the target be not because the error between variable element is in the error range, institute is obtained The corresponding newest adjacent two newest correction parameters opposite because the difference of variable element is symbol with the target because of variable element；

The median for choosing two adjacent newest correction parameters is third correction parameter；

It obtains the goal systems and the resulting third of AEC correction is carried out because of variable element according to the third correction parameter；

Judge the third because variable element and the target are because whether the error between variable element is in the error range；

If the third is because variable element and the target are because the error between variable element is in the error range, it is determined that described Third correction parameter is target correction parameter of the matching target because of variable element.

5. method according to claim 1 to 4, which is characterized in that in the Theoretical Correction for obtaining goal systems Before parameter, further includes:

Obtain the linear fit function；

Using the target because variable element is as the dependent variable substitution linear fit function, oneself of the linear fit function is calculated Variate-value.

6. according to the method described in claim 5, it is characterized in that, described obtain the linear fit function, comprising:

It is sampling correcting parameter that at least two different correction parameters are chosen within the scope of preset correction parameter；

It obtains the goal systems and the resulting each sampling of AEC correction is carried out because of variable element according to each sampling correcting parameter respectively；

To each sampling correcting parameter and each sampling because of variable element progress linear fit, the linear fit letter of the goal systems is generated Number.

7. according to the method described in claim 5, the default correction is joined it is characterized in that, the goal systems is DR system Number be the left field compensation parameter of ionisation chamber, the right field compensation parameter of ionisation chamber or KV breakpoint ionisation chamber reference voltages, it is described it is default because Variable element mutually should be the mAs feedback quantity or image averaging gray scale of the right field of mAs feedback quantity, ionisation chamber of the left field of ionisation chamber.

8. the method according to the description of claim 7 is characterized in that the default correction parameter is the left field compensation parameter of ionisation chamber Or when the right field compensation parameter of ionisation chamber, it is described obtain the goal systems AEC carried out according to the Theoretical Correction parameter correct institute First obtained is because of variable element, comprising:

Obtain DR system switching AEC ionisation chamber be respective fields and by respective fields compensating parameter of the Theoretical Correction parameter into Row exposes the first mAs feedback quantity of resulting respective fields.

9. the method according to the description of claim 7 is characterized in that the ionisation chamber that the default correction parameter is KV breakpoint refers to It is described to obtain the goal systems AEC correction resulting first is carried out because of variable element according to the Theoretical Correction parameter when voltage, Include:

It obtains the DR system and is exposed gained by the ionisation chamber reference voltage of corresponding K V breakpoint of the Theoretical Correction parameter Image predeterminable area the first image averaging gray scale.

10. a kind of correction parameter determining device is applied to auto-exposure control AEC and corrects, which is characterized in that described device packet It includes:

Theoretical Correction parameter acquisition module, for obtaining the Theoretical Correction parameter of goal systems, the Theoretical Correction parameter is institute State in the linear fit function of goal systems dependent variable be preset target because of variable element when corresponding argument value, it is described linear Fitting function is the default fitting function changed linearly by variable element with default correction parameter；The linear fit function are as follows: Different correction parameters within the scope of preset correction parameter carry out AEC correction according to different correction parameters from the goal systems Linear fit result of the resulting each sampling because of variable element；

First because variable element obtains module, carries out AEC correction according to the Theoretical Correction parameter for obtaining the goal systems Resulting first because of variable element；

First parameter determination module, for described first because variable element and the target are because the error between variable element is default Error range in when, determine that the Theoretical Correction parameter is target correction parameter of the matching target because of variable element.

11. device according to claim 10, which is characterized in that described device further include:

Approach step-length and obtain module, for described first because variable element and the target be not because the error between variable element is in institute When stating in error range, obtains and approach step-length because variable element is corresponding with the Theoretical Correction parameter and described first；

Newest correction parameter computing module, for calculate the Theoretical Correction parameter and N times for approaching step-length it is being worth and, give birth to At M newest correction parameters, wherein N is 1 integer for arriving M, and M is the integer more than or equal to 1；

It is newest because variable element obtains module, carried out respectively according to the newest correction parameters of the M for obtaining the goal systems The M that AEC corrects the M newest correction parameters of resulting correspondence is a newest because of variable element；

It is newest because of variable element judgment module, for judge respectively M it is newest because variable element and the target are because between variable element Whether error is in the error range；

Third parameter determination module, at least one it is newest because of variable element and the target because the error between variable element exists When in the error range, by M it is newest because in variable element with the target because the error between variable element is in the error model It is any newest because of the corresponding newest correction parameter of variable element in enclosing, it is determined as matching the target because of the target correction of variable element Parameter.

12. device according to claim 11, which is characterized in that it is described approach step-length obtain module include:

First correction parameter computing module is used for described first because variable element is as the dependent variable substitution linear fit letter Number, calculating the linear fit argument of function value is the first correction parameter；

Step-length computing module is approached, the difference for calculating the Theoretical Correction parameter and first correction parameter is described forces Nearly step-length.

13. device according to claim 11, which is characterized in that described device further include:

Adjacent parameter obtains module, for M it is newest because of variable element and the target because the error between variable element does not exist When in the error range, obtain it is corresponding it is newest because of variable element with the target because the difference of variable element is opposite for symbol Two adjacent newest correction parameters；

Third correction parameter obtains module, and the median for choosing two adjacent newest correction parameters is third correction ginseng Number；

Third is exposed resulting because variable element obtains module, for obtaining the goal systems with the third correction parameter Third is because of variable element；

Third is because of variable element judgment module, for judging the third because variable element and the target are because of the error between variable element Whether in the error range；

4th parameter determination module, in the third because variable element and the target are because the error between variable element is described in When in error range, determine that the third correction parameter is target correction parameter of the matching target because of variable element.

14. device described in any one of 0 to 13 according to claim 1, which is characterized in that described device further include:

Function obtains module, for obtaining the linear fit function；

Argument value computing module, for because variable element is as the dependent variable substitution linear fit function, counting the target Calculate the linear fit argument of function value.

15. device according to claim 14, which is characterized in that the function obtains module and includes:

Sampling correcting parameter acquisition module, for choosing at least two different correction parameters within the scope of preset correction parameter For sampling correcting parameter；

Sampling carries out the school AEC according to each sampling correcting parameter respectively because variable element obtains module, for obtaining the goal systems Just resulting each sampling is because of variable element；

Linear fit module, for, because of variable element progress linear fit, generating the mesh to each sampling correcting parameter and each sampling The linear fit function of mark system.

16. device according to claim 14, which is characterized in that the goal systems is DR system, the default correction Parameter is the ionisation chamber reference voltage of the left field compensation parameter of ionisation chamber, the right field compensation parameter of ionisation chamber or KV breakpoint, described default Because variable element mutually should be the mAs feedback quantity or image averaging gray scale of the right field of mAs feedback quantity, ionisation chamber of the left field of ionisation chamber.

17. device according to claim 16, which is characterized in that the default correction parameter is the left field compensation ginseng of ionisation chamber When the right field compensation parameter of several or ionisation chamber, described first includes: because variable element obtains module

First mAs feedback quantity obtains module, for obtaining the DR system switching AEC ionisation chamber for respective fields and with the theory Correction parameter is the first mAs feedback quantity that respective fields compensating parameter is exposed resulting respective fields.

18. device according to claim 16, which is characterized in that the default correction parameter is that the ionisation chamber of KV breakpoint is joined When examining voltage, described first includes: because variable element obtains module

First image averaging gray scale obtains module, for obtaining the DR system using the Theoretical Correction parameter as corresponding K V breakpoint Ionisation chamber reference voltage be exposed resulting image predeterminable area the first image averaging gray scale.

19. a kind of correction parameter determines equipment, it is applied to auto-exposure control AEC and corrects characterized by comprising

Processor；For storing the memory of the processor-executable instruction；

Wherein, the processor is configured to: