CN105361898A

CN105361898A - Correction parameter determining method, device and equipment

Info

Publication number: CN105361898A
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: 2016-03-02
Anticipated expiration: 2035-12-11
Also published as: CN105361898B

Abstract

The invention discloses a correction parameter determining method, device and equipment, applied to automatic exposure control AEC correction. The method comprises the following steps: acquiring a theoretical correction parameter of a target system, wherein the theoretical correction parameter is a corresponding independent variable value when a dependent variable in a linear fitting function of the target system is a preset target dependent variable parameter, and the linear fitting function is a fitting function that the preset dependent variable parameter is in linear change along with a preset correction parameter; acquiring a first dependent variable parameter of the target system, wherein the first dependent variable parameter is obtained by carrying out AEC correction according to the theoretical correction parameter; and determining the theoretical correction parameter as a target correction parameter which is matched with the target dependent variable parameter when an error between the first dependent variable parameter and the target dependent variable parameter is within a preset error range. According to the embodiment disclosed by the invention, correction times are effectively reduced and the target correction parameter, which is matched with the target dependent variable parameter, is rapidly acquired, so that the correction parameter determining efficiency is improved.

Description

Correction parameter defining method, device and equipment

Technical field

The application relates to parameter correction technical field, particularly relates to correction parameter defining method, device and equipment.

Background technology

Digital radiography (DR, DigitalRadiography) equipment because its radiation dose is little, the quality of image is high, the accuracy of the recall rate of disease and diagnosis is higher and be widely used.The auto-exposure control (AEC, AutomaticExposureControl) of DR system corrects most important in the use procedure of DR system.

Relevant parameter after the exposure of AEC alignment requirements, in preset range, carries out AEC correction to DR system, usually needs repeatedly to arrange parameter to be corrected, exposes for each parameter to be corrected arranged, and judges whether the relevant parameter after exposing is in preset range.

Above-mentioned AEC correcting mode is difficult to determine optimum configurations number of times to be corrected and exposure frequency, and exposure frequency is more, and light exposure and the time of exposure of X-ray are more, and it is lower that AEC corrects efficiency.

Summary of the invention

The application provides correction parameter defining method, device and equipment, corrects the lower problem of efficiency to solve existing AEC.

According to the first aspect of the embodiment of the present application, provide a kind of correction parameter defining method, be applied to auto-exposure control AEC and correct, described method comprises:

Obtain the Theoretical Correction parameter of goal systems, described Theoretical Correction parameter be in the linear fit function of described goal systems dependent variable be default target because of argument value corresponding during variable element, described linear fit function is the fitting function preset because variable element linearly changes with default correction parameter;

Obtain described goal systems and carry out first of AEC correction gained because of variable element according to described Theoretical Correction parameter;

If described first because variable element and described target are because the error between variable element is in the range of error preset, then determine that described Theoretical Correction parameter is the target correction parameter of the described target of coupling because of variable element.

According to the second aspect of the embodiment of the present application, provide a kind of correction parameter determining device, be applied to auto-exposure control AEC and correct, described device comprises:

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

First because of variable element acquisition module, carries out first of AEC correction gained because of variable element for obtaining described goal systems according to described Theoretical Correction parameter;

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

According to the third aspect of the embodiment of the present application, provide a kind of correction parameter determination equipment, be applied to auto-exposure control AEC and correct, comprising:

Processor; For storing the memorizer of described processor executable;

Wherein, described processor is configured to:

Application the embodiment of the present application, the application is by obtaining the Theoretical Correction parameter of goal systems, described goal systems is carried out AEC according to described Theoretical Correction parameter and is corrected first of gained because of variable element, and described first because variable element and described target are because of when the error between variable element is in the range of error preset, determine that described Theoretical Correction parameter is the target correction parameter of the described target of coupling because of variable element, effectively can reduce number of corrections, the target correction parameter that quick acquisition is mated because of variable element with target, improve correction parameter determination efficiency, and then can be applicable to AEC correction to improve AEC correction efficiency.

Should be understood that, it is only exemplary and explanatory that above general description and details hereinafter describe, and can not limit the application.

Accompanying drawing explanation

Accompanying drawing to be herein merged in description and to form the part of this description, shows the embodiment meeting the application, and is used from description one principle explaining the application.

Figure 1A is an embodiment flow chart of the application's correction parameter defining 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 of the linear fit function of the application's correction parameter defining method;

Fig. 2 A is another embodiment flow chart of the application's correction parameter defining method;

Fig. 2 B is the schematic diagram of the second correction parameter of the application's correction parameter defining method;

Fig. 3 A is another embodiment flow chart of the application's correction parameter defining method;

Fig. 3 B is the 3rd correction parameter of the application's correction parameter defining method and the schematic diagram of the 4th correction parameter;

Fig. 4 is the embodiment hardware structure figure of the application's correction parameter determining device;

Fig. 5 is an embodiment block diagram of the application's correction parameter determining device;

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

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

Detailed description of the invention

Only for describing the object of specific embodiment at term used in this application, and not intended to be limiting the application." one ", " described " and " being somebody's turn to do " of the singulative used in the application and appended claims is also intended to comprise most form, unless context clearly represents other implications.It is also understood that term "and/or" used herein refer to and comprise one or more project of listing be associated any or all may combine.

Below in conjunction with specific embodiment, the application is described in detail.

See Figure 1A, be an embodiment flow chart of the application's correction parameter defining method, be applied to auto-exposure control AEC and correct, comprise the following steps:

Step 101: the Theoretical Correction parameter obtaining goal systems, described Theoretical Correction parameter be in the linear fit function of described goal systems dependent variable be default target because of argument value corresponding during variable element, described linear fit function is the fitting function preset because variable element linearly changes with default correction parameter.

Step 102: obtain described goal systems and carry out first of AEC correction gained because of variable element according to described Theoretical Correction parameter.

Step 103: if described first because variable element and described target are because the error between variable element is in the range of error preset, then determine that described Theoretical Correction parameter is the target correction parameter of the described target of coupling because of variable element.

The present embodiment, by obtaining the Theoretical Correction parameter of goal systems, described goal systems is carried out AEC according to described Theoretical Correction parameter and is corrected first of gained because of variable element, and described first because variable element and described target are because of when the error between variable element is in the range of error preset, determine that described Theoretical Correction parameter is the target correction parameter of the described target of coupling because of variable element, effectively can reduce number of corrections, the target correction parameter that quick acquisition is mated because of variable element with target, improve correction parameter determination efficiency, and then can be applicable to AEC correction to improve AEC correction efficiency.

The correction parameter of the application is determined, can be applicable to digital radiography (DR, in the auto-exposure control trimming process of DigitalRadiography) system, obtain the correction parameter mated because of variable element with the target of DR system fast, without the need to artificial according to different target because of variable element scope, correction parameter is set repeatedly and makes DR system exposure, correction efficiency and the accuracy of auto-exposure control can be improved greatly.

Wherein, for step 101, described goal systems can be DR system, described default correction parameter can be the ionization chamber reference voltage of ionization chamber left field compensation parameter, the right field compensation parameter of ionization chamber or KV breakpoint, KV breakpoint is tube voltage breakpoint, and described presetting can be the mAs feedback quantity of the left field of ionization chamber, the mAs feedback quantity of the right field of ionization chamber or image averaging gray scale because variable element is corresponding.Wherein, mA*ms=mAs, mAs are called for short milliampere-second.

In the present embodiment, the Theoretical Correction parameter obtaining goal systems directly can transfer from default memory area the Theoretical Correction parameter prestored, and also can generate in real time.Described linear fit function can real-time fitting generate, and also can directly transfer from default memory area.

In DR system, under identical X-ray bulb voltage, because being positive correlation between variable element and correction parameter, as shown in Figure 1B, curve g (x) can be because of the actual curve relation between variable element and correction parameter.Goal systems is approximately linear positive correlation because of the relation between variable element and correction parameter by the embodiment of the application, by carrying out linear fit to goal systems because of variable element and correction parameter, the linear fit function that straight line f (x) is as shown in Figure 1 C goal systems can be obtained.

In an optional implementation, before the Theoretical Correction parameter obtaining goal systems, also comprise:

Obtain described linear fit function.

Described target is substituted into described linear fit function because of variable element as dependent variable, calculates described linear fit argument of function value.

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

In another optional implementation, the described linear fit function of described acquisition, comprising:

Within the scope of the correction parameter preset, choose at least two different correction parameters is sampling correcting parameter.

Obtain described goal systems and carry out each sampling of AEC correction gained because of variable element according to each sampling correcting parameter respectively.

To each sampling correcting parameter and each sampling because variable element carries out linear fit, generate the linear fit function of described goal systems.

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

Wherein, when described default correction parameter is the ionization chamber reference voltage of KV breakpoint, described correction parameter scope can be 0 ~ 10 volt, and when described default correction parameter is ionization chamber left field compensation parameter or ionization chamber right field compensation parameter, described correction parameter scope can be-100 ~ 100.

As shown in Figure 1 C, the abscissa of A, B two points is respectively sampling correcting parameter, and vertical coordinate is respectively sampling because of variable element.

In other optional implementations, also by choosing any two coordinate points of described linear fit function on coordinate diagram cathetus, the vertical coordinate difference of two coordinate points that acquisition is chosen and the ratio of abscissa difference are described function slope.

For step 102, described AEC correct comprise KV breakpoint correct and ionization chamber field balance correction at least one correct, described target because of variable element be preset for judge AEC correct whether will correction parameter adjustment to the critical parameter of target correction parameter.Obtain described goal systems to carry out AEC according to described Theoretical Correction parameter and correct first of gained and obtain described goal systems and carry out AEC according to described Theoretical Correction parameter because the mode of variable element can be and expose first of gained because of variable element, comprise: receive described goal systems with described Theoretical Correction parameter by correction parameter carry out exposing one-tenth image corresponding first because of variable element, or, read described goal systems with described Theoretical Correction parameter by correction parameter carry out exposing one-tenth image corresponding first because of variable element.

Obtain described goal systems according to described Theoretical Correction parameter carry out AEC correct gained first because of variable element time, described Theoretical Correction parameter can be sent to the control appliance of described goal systems, be the corresponding parametric values of described goal systems by described Theoretical Correction optimum configurations by described control appliance, and then control exposure.

In an optional implementation, when described default correction parameter is ionization chamber left field compensation parameter or ionization chamber right field compensation parameter, the described goal systems of described acquisition is carried out AEC according to described Theoretical Correction parameter and is corrected first of gained because of variable element, comprising:

Obtain described DR systematic evaluation AEC ionization chamber and be respective fields and the mAs feedback quantity carrying out the respective fields of exposure gained with described Theoretical Correction parameter for respective fields compensating parameter.

Wherein, described respective fields is the right field of ionization chamber or the left field of ionization chamber.

Be respective fields and be before respective fields compensating parameter carries out a mAs feedback quantity of the respective fields exposing gained according to described Theoretical Correction parameter obtaining described DR systematic evaluation AEC ionization chamber, field compensation parameter can be set and be 0, switching auto-exposure control ionization chamber is midfield, expose, and record the mAs reference value that mAs feedback quantity is field compensation.

In another optional implementation, when described default correction parameter is the ionization chamber reference voltage of KV breakpoint, the described goal systems of described acquisition is carried out AEC according to described Theoretical Correction parameter and is corrected first of gained because of variable element, comprising:

Obtain described DR system carries out exposing the predeterminable area of the image of gained the first image averaging gray scale with the ionization chamber reference voltage that described Theoretical Correction parameter is corresponding K V breakpoint.

Wherein, described predeterminable area can be picture centre region, and described corresponding breakpoint is other breakpoints except 50KV breakpoint, because need when correcting 50KV breakpoint to regulate potentiometer on high pressure equipment, other KV breakpoints carry out AEC correction based on the potentiometer that adjusted is good.

Carry out the first image averaging gray scale of the predeterminable area of the image exposing gained with the ionization chamber reference voltage that described Theoretical Correction parameter is corresponding K V breakpoint in the described DR system of acquisition before, conditions of exposure and the reference voltage of 50KV breakpoint can be set, expose, and record the image averaging gray scale (average gray of the predeterminable area of image) of image, judge that whether image averaging gray scale is the target average gray of DR system, if, then enter and obtain described DR system carries out exposing the first image averaging gray scale of the predeterminable area of the image of gained operation with the ionization chamber reference voltage that described Theoretical Correction parameter is corresponding K V breakpoint, if not, the potentiometer of adjustment respective channel, repeated exposure again, the image averaging gray scale of record image, until the image averaging gray scale of record is described target average gray.

For step 103, by calculate described target because of variable element and described first because of the difference of variable element, the absolute value of described difference or described difference and described target because the ratio of variable element obtains described error, then more described error and described range of error, judges that described first because variable element and described target are because the error between variable element is whether in described range of error.When error is ratio because of variable element of described difference and described target, described range of error can be 0 to 10, also can be set to other numerical rangies as the case may be.In other optional implementations of the application, also determine that described first because variable element and described target are because the error between variable element is whether in described range of error by other correlation techniques.

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

See another embodiment flow chart that Fig. 2 A, Fig. 2 A is the application's correction parameter defining method, in the method, the step identical with the flow process of Figure 1A example, will simply describe at the present embodiment, specifically can in conjunction with see the detailed description for Figure 1A flow process.

Correction parameter defining method shown in Fig. 2 A can comprise the following steps:

Step 201: the Theoretical Correction parameter obtaining goal systems, described Theoretical Correction parameter be in the linear fit function of described goal systems dependent variable be default target because of argument value corresponding during variable element, described linear fit function is the fitting function preset because variable element linearly changes with default correction parameter.

Step 202: obtain described goal systems and carry out first of AEC correction gained because of variable element according to described Theoretical Correction parameter.

Step 203: if described first because variable element and described target are because the error between variable element is in the range of error preset, then determine that described Theoretical Correction parameter is the target correction parameter of the described target of coupling because of variable element.

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

Step 205: calculate that described Theoretical Correction parameter and the described N approaching step-length are doubly worth and, generate M up-to-date correction parameter, wherein, N is the integer of 1 to M, M be more than or equal to 1 integer.

Step 206: obtain described goal systems and carry out AEC according to described M up-to-date correction parameter respectively to correct M of the described M of correspondence up-to-date correction parameter of gained up-to-date because of variable element.

Step 207: judge that M is up-to-date because variable element and described target are because the error between variable element is whether in described range of error respectively.

Step 208: if at least one is up-to-date because variable element and described target are because the error between variable element is in described range of error, by up-to-date for M because of in variable element with described target because of arbitrary up-to-date because of the variable element corresponding up-to-date correction parameter of the error between variable element in described range of error, be defined as mating the target correction parameter of described target because of variable element.

The present embodiment, described first because of variable element and described target because of the error between variable element not in described range of error time, carry out AEC according to described up-to-date correction parameter correct the up-to-date because of variable element of gained by obtaining up-to-date correction parameter and described goal systems, and described up-to-date because variable element and described target are because of when the error between variable element is in described range of error, determine whether corresponding up-to-date correction parameter is the target correction parameter of the described target of coupling because of variable element, effectively can reduce number of corrections, the target correction parameter that quick acquisition is mated because of variable element with target, improve correction parameter determination efficiency, and then improve AEC correction efficiency.

Wherein, for step 204, described Theoretical Correction parameter and described first can be pre-set because of variable element and the corresponding relation approached between step-length or the rule of correspondence, described in obtaining according to corresponding relation or the rule of correspondence, approach step-length.Describedly approaching step-length as shown in Figure 2 B, is the Diff E L between D and C two points _step, C point abscissa is Theoretical Correction parameter.

In an optional implementation, described acquisition and described Theoretical Correction parameter and described first because of variable element corresponding approach step-length, comprising:

Using described first because variable element substitutes into described linear fit function as dependent variable, calculating described linear fit argument of function value is the first correction parameter.

The difference calculating described Theoretical Correction parameter and described first correction parameter for described in approach step-length.

In other optional implementations, by described target because variable element and described first is because the difference of variable element is divided by the slope of described linear fit function, described in obtaining, step-length can also be approached.

For step 206 and step 208, similar with the specific implementation process of step 102 and 103.Only with up-to-date correction parameter and up-to-date because of variable element respectively substitute Theoretical Correction parameter and first because of variable element.

See another embodiment flow chart that Fig. 3 A, Fig. 3 A is the application's correction parameter defining method, in the method, the step identical with the flow process of Fig. 2 A example, will simply describe at the present embodiment, specifically can in conjunction with see the detailed description for Fig. 2 A flow process.

Correction parameter defining method shown in Fig. 3 A can comprise the following steps:

Step 301: the Theoretical Correction parameter obtaining goal systems, described Theoretical Correction parameter be in the linear fit function of described goal systems dependent variable be default target because of argument value corresponding during variable element, described linear fit function is the fitting function preset because variable element linearly changes with default correction parameter.

Step 302: obtain described goal systems and carry out first of AEC correction gained because of variable element according to described Theoretical Correction parameter.

Step 303: if described first because variable element and described target are because the error between variable element is in the range of error preset, then determine that described Theoretical Correction parameter is the target correction parameter of the described target of coupling because of variable element.

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

Step 305: calculate that described Theoretical Correction parameter and the described N approaching step-length are doubly worth and, generate M up-to-date correction parameter, wherein, N is the integer of 1 to M, M be more than or equal to 1 integer.

Step 306: obtain described goal systems and carry out AEC according to described M up-to-date correction parameter respectively to correct M of the described M of correspondence up-to-date correction parameter of gained up-to-date because of variable element.

Step 307: judge that M is up-to-date because variable element and described target are because the error between variable element is whether in described range of error respectively.

Step 308: if at least one is up-to-date because variable element and described target are because the error between variable element is in described range of error, by up-to-date for M because of in variable element with described target because of arbitrary up-to-date because of the variable element corresponding up-to-date correction parameter of the error between variable element in described range of error, be defined as mating the target correction parameter of described target because of variable element.

Step 309: if M is up-to-date because variable element and described target be not because the error between variable element is all in described range of error, up-to-date corresponding to acquisition because of variable element with described target because the difference of variable element is two adjacent up-to-date correction parameters that symbol is contrary.

Step 310: the intermediate value choosing two adjacent up-to-date correction parameters is the 3rd correction parameter.

Step 311: obtain described goal systems and carry out according to described 3rd correction parameter the three categories of etiologic factors variable element that AEC corrects gained.

Step 312: judge that described three categories of etiologic factors variable element and described target are because the error between variable element is whether in described range of error.

Step 313: if described three categories of etiologic factors variable element and described target are because the error between variable element is in described range of error, then determine that described 3rd correction parameter is the target correction parameter of the described target of coupling because of variable element.

The present embodiment, up-to-date because variable element and described target are because of when the error between variable element is all not in described range of error at M, carry out exposing the three categories of etiologic factors variable element of gained with described 3rd correction parameter by obtaining the 3rd correction parameter and described goal systems, and in described three categories of etiologic factors variable element and described target because of when the error between variable element is in described range of error, determine whether described 3rd correction parameter is the target correction parameter of the described target of coupling because of variable element, effectively can reduce number of corrections, the target correction parameter that quick acquisition is mated because of variable element with target, improve correction parameter determination efficiency, and then improve AEC correction efficiency.

For step 309, as shown in Figure 3 B, two adjacent up-to-date correction parameters are the abscissa of D and E.Can determine that target correction parameter is between a D and some E according to monotonic function intermediate value theorem.

For step 310, the 3rd correction parameter is for putting the abscissa of F shown in Fig. 3 B.

For step 311 and step 313, similar with the specific implementation process of step 102 and 103.Only substitute Theoretical Correction parameter and first respectively because of variable element with the 3rd correction parameter and three categories of etiologic factors variable element.

In an optional implementation, described method also comprises:

If described three categories of etiologic factors variable element and described target be not because the error between variable element is in described range of error, when described three categories of etiologic factors variable element is greater than described target because of variable element, the intermediate value choosing the up-to-date correction parameter that numerical value is less in described 3rd correction parameter and adjacent two up-to-date correction parameters is the 4th correction parameter.

When described three categories of etiologic factors variable element is less than described target because of variable element, the intermediate value choosing the up-to-date correction parameter that numerical value is larger in described 3rd correction parameter and adjacent two up-to-date correction parameters is the 4th correction parameter.

Obtain described goal systems and carry out exposing the 4th of gained the because of variable element with described 4th correction parameter;

If the described 4th because variable element and described target are because the error between variable element is in described range of error, then determine that described 4th correction parameter is the target correction parameter of the described target of coupling because of variable element.

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

Further, if the described 4th because variable element and described target be not because the error between variable element is in described range of error, when the described 4th is less than described target because of variable element because of variable element, judge whether the spacing of the 4th correction parameter and the 3rd correction parameter is less than default minimum step, if be less than, stop the determination of target correction parameter, if be not less than, the intermediate value choosing described 4th correction parameter and the 3rd correction parameter is the 5th correction parameter, obtain described goal systems and carry out exposing the 5th of gained the because of variable element with described 5th correction parameter, if the described 5th because variable element and described target are because the error between variable element is in described range of error, then determine that described 5th correction parameter is the target correction parameter of the described target of coupling because of variable element.

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

In other optional implementations, can choose principle according to the correction parameter of above-mentioned embodiment, the intermediate value choosing other numerical intervals is the 5th because of variable element.

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

The embodiment of the application's correction parameter determining device can be applied in the equipment of DR system or other need on the equipment of auto-exposure control.Device embodiment can pass through software simulating, also can be realized by the mode of hardware or software and hardware combining.For software simulating, as the device on a logical meaning, be need the processor of the equipment of auto-exposure control to be read in internal memory to run by computer program instructions corresponding in memorizer and formed by the equipment of its place DR system or other.Say from hardware view, as shown in Figure 4, for the equipment of the application's correction parameter determining device place DR system or other need a kind of hardware structure diagram of the equipment of auto-exposure control, except the processor shown in Fig. 4, internal memory, network interface and memorizer, in embodiment the equipment of the DR system at device place or other need the equipment of auto-exposure control usually according to the actual functional capability of this equipment, other hardware can also be comprised, this is repeated no more.

Wherein, can store logical order corresponding to correction parameter defining method in memorizer, this memorizer can be such as nonvolatile memory (non-volatilememory).Processor can call the logical order of the preservation in execute store, to perform above-mentioned correction parameter defining method.

If the function of the logical order that correction parameter defining method is corresponding using the form of SFU software functional unit realize and as independently production marketing or use time, can be stored in a computer read/write memory medium.Based on such understanding, the part of the part that the technical scheme of the application contributes to prior art in essence in other words or this technical scheme can embody with the form of software product, this computer software product is stored in a storage medium, comprising some instructions in order to make a computer equipment (can be personal computer, server, or the network equipment etc.) perform all or part of step of method described in each embodiment of the present invention.And aforesaid storage medium comprises: USB flash disk, portable hard drive, read only memory (ROM, Read-OnlyMemory), random access memory (RAM, RandomAccessMemory), magnetic disc or CD etc. various can be program code stored medium.

Be the application's correction parameter determining device embodiment block diagram see Fig. 5, Fig. 5:

This device comprises: Theoretical Correction parameter acquisition module 510, first is because of variable element acquisition module 520 and the first parameter determination module 530.

Wherein, Theoretical Correction parameter acquisition module 510, for obtaining the Theoretical Correction parameter of goal systems, described Theoretical Correction parameter be in the linear fit function of described goal systems dependent variable be default target because of argument value corresponding during variable element, described linear fit function is the fitting function preset because variable element linearly changes with default correction parameter.

First because of variable element acquisition module 520, carries out first of AEC correction gained because of variable element for obtaining described goal systems according to described Theoretical Correction parameter.

First parameter determination module 530, for described first because variable element and described target are because of when the error between variable element is in the range of error preset, determine that described Theoretical Correction parameter is the target correction parameter of the described target of coupling because of variable element.

The present embodiment, by obtaining the Theoretical Correction parameter of goal systems, described goal systems carries out first of exposure gained because of variable element with described Theoretical Correction parameter, and described first because variable element and described target are because of when the error between variable element is in the range of error preset, determine that described Theoretical Correction parameter is the target correction parameter of the described target of coupling because of variable element, effectively can reduce number of corrections, the target correction parameter that quick acquisition is mated because of variable element with target, improve correction parameter determination efficiency, and then can be applicable to AEC correction to improve AEC correction efficiency.

In an optional implementation:

Correction parameter determining device also can comprise (not shown in Fig. 5):

Function acquisition module, for obtaining described linear fit function.

Argument value computing module, for described target is substituted into described linear fit function because of variable element as dependent variable, calculates described linear fit argument of function value.

In another optional implementation:

Described function acquisition module also can comprise (not shown in Fig. 5):

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

Sampling, because of variable element acquisition module, carries out each sampling of AEC correction gained because of variable element according to each sampling correcting parameter respectively for obtaining described goal systems.

Linear fit module, for each sampling correcting parameter and each sampling because variable element carries out linear fit, generate the linear fit function of described goal systems.

In another optional implementation, described default correction parameter is the ionization chamber reference voltage of ionization chamber left field compensation parameter, the right field compensation parameter of ionization chamber or KV breakpoint, and described presetting should be the mAs feedback quantity of the left field of ionization chamber, the mAs feedback quantity of the right field of ionization chamber or image averaging gray scale mutually because of variable element.

In another optional implementation, when described default correction parameter is ionization chamber left field compensation parameter or ionization chamber right field compensation parameter, first can comprise (not shown in Fig. 5) because of variable element acquisition module 520:

One mAs feedback quantity acquisition module, is respective fields and the mAs feedback quantity carrying out the respective fields of exposure gained with described Theoretical Correction parameter for respective fields compensating parameter for obtaining described DR systematic evaluation AEC ionization chamber.

In another optional implementation, when described default correction parameter is the ionization chamber reference voltage of KV breakpoint, first can comprise (not shown in Fig. 5) because of variable element acquisition module 520:

First image averaging gray scale acquisition module, carries out exposing the first image averaging gray scale of predeterminable area of the image of gained with the ionization chamber reference voltage that described Theoretical Correction parameter is corresponding K V breakpoint for obtaining described DR system.

Another embodiment block diagram see Fig. 6, Fig. 6 are the application's correction parameter determining device:

This device comprises: Theoretical Correction parameter acquisition module 610, first because of variable element acquisition module 620, first parameter determination module 630, approach step-length acquisition module 640, up-to-date correction parameter acquisition module 650, up-to-date because of variable element acquisition module 660, up-to-date because of variable element judge module 670 and the 3rd parameter determination module 680.

Wherein, Theoretical Correction parameter acquisition module 610, for obtaining the Theoretical Correction parameter of goal systems, described Theoretical Correction parameter be in the linear fit function of described goal systems dependent variable be default target because of argument value corresponding during variable element, described linear fit function is the fitting function preset because variable element linearly changes with default correction parameter.

First because of variable element acquisition module 620, carries out first of AEC correction gained because of variable element for obtaining described goal systems according to described Theoretical Correction parameter.

First parameter determination module 630, for described first because variable element and described target are because of when the error between variable element is in the range of error preset, determine that described Theoretical Correction parameter is the target correction parameter of the described target of coupling because of variable element.

Approach step-length acquisition module 640, for described first because variable element and described target are because of when the error between variable element is not in described range of error, obtain with described Theoretical Correction parameter and described first because of variable element corresponding approach step-length.

Up-to-date correction parameter computing module 650, for calculate that described Theoretical Correction parameter and the described N approaching step-length are doubly worth and, generate M up-to-date correction parameter, wherein, N is the integer of 1 to M, M be more than or equal to 1 integer.

Up-to-date because of variable element acquisition module 660, carry out AEC according to described M up-to-date correction parameter respectively for obtaining described goal systems to correct M of the described M of correspondence up-to-date correction parameter of gained up-to-date because of variable element.

Up-to-date because of variable element judge module 670, for judging that M is up-to-date because variable element and described target are because the error between variable element is whether in described range of error respectively.

3rd parameter determination module 680, for up-to-date because variable element and described target are because of when the error between variable element is in described range of error at least one, by up-to-date for M because of in variable element with described target because of arbitrary up-to-date because of the variable element corresponding up-to-date correction parameter of the error between variable element in described range of error, be defined as mating the target correction parameter of described target because of variable element.

In an optional implementation:

Approach step-length acquisition module 640 can comprise (not shown in Fig. 6):

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

Approach step-length computing module, for the difference that calculates described Theoretical Correction parameter and described first correction parameter for described in approach step-length.

Another embodiment block diagram see Fig. 7, Fig. 7 are the application's correction parameter determining device:

This device comprises: Theoretical Correction parameter acquisition module 701, first because of variable element acquisition module 702, first parameter determination module 703, approach step-length acquisition module 704, up-to-date correction parameter acquisition module 705, up-to-date because of variable element acquisition module 706, up-to-date because of variable element judge module 707, 3rd parameter determination module 708, adjacent parameter acquisition module 709, 3rd correction parameter acquisition module 710, three categories of etiologic factors variable element acquisition module 711, three categories of etiologic factors variable element judge module 712 and the 4th parameter determination module 713.

Wherein, Theoretical Correction parameter acquisition module 701, for obtaining the Theoretical Correction parameter of goal systems, described Theoretical Correction parameter be in the linear fit function of described goal systems dependent variable be default target because of argument value corresponding during variable element, described linear fit function is the fitting function preset because variable element linearly changes with default correction parameter.

First because of variable element acquisition module 702, carries out first of AEC correction gained because of variable element for obtaining described goal systems according to described Theoretical Correction parameter.

First parameter determination module 703, for described first because variable element and described target are because of when the error between variable element is in the range of error preset, determine that described Theoretical Correction parameter is the target correction parameter of the described target of coupling because of variable element.

Approach step-length acquisition module 704, for described first because variable element and described target are because of when the error between variable element is not in described range of error, obtain with described Theoretical Correction parameter and described first because of variable element corresponding approach step-length.

Up-to-date correction parameter computing module 705, for calculate that described Theoretical Correction parameter and the described N approaching step-length are doubly worth and, generate M up-to-date correction parameter, wherein, N is the integer of 1 to M, M be more than or equal to 1 integer.

Up-to-date because of variable element acquisition module 706, carry out AEC according to described M up-to-date correction parameter respectively for obtaining described goal systems to correct M of the described M of correspondence up-to-date correction parameter of gained up-to-date because of variable element.

Up-to-date because of variable element judge module 707, for judging that M is up-to-date because variable element and described target are because the error between variable element is whether in described range of error respectively.

3rd parameter determination module 708, for up-to-date because variable element and described target are because of when the error between variable element is in described range of error at least one, by up-to-date for M because of in variable element with described target because of arbitrary up-to-date because of the variable element corresponding up-to-date correction parameter of the error between variable element in described range of error, be defined as mating the target correction parameter of described target because of variable element.

Adjacent parameter acquisition module 709, for up-to-date because variable element and described target are because of when the error between variable element is all not in described range of error at M, up-to-date corresponding to acquisition because of variable element with described target because the difference of variable element is two adjacent up-to-date correction parameters that symbol is contrary.

3rd correction parameter acquisition module 710 is the 3rd correction parameter for choosing the intermediate value of two adjacent up-to-date correction parameters.

Three categories of etiologic factors variable element acquisition module 711, carries out according to described 3rd correction parameter the three categories of etiologic factors variable element that AEC corrects gained for obtaining described goal systems.

Three categories of etiologic factors variable element judge module 712, for judging that described three categories of etiologic factors variable element and described target are because the error between variable element is whether in described range of error.

4th parameter determination module 713, in described three categories of etiologic factors variable element and described target because of when the error between variable element is in described range of error, determine that described 3rd correction parameter is the target correction parameter of the described target of coupling because of variable element.

In an optional implementation:

Correction parameter determining device also can comprise (not shown in Fig. 7):

First chooses module, for in described three categories of etiologic factors variable element and described target because the error between variable element is not in described range of error, and described three categories of etiologic factors variable element is when being greater than described target because of variable element, the intermediate value choosing the up-to-date correction parameter that numerical value is less in described 3rd correction parameter and adjacent two up-to-date correction parameters is the 4th correction parameter.

Second chooses module, for in described three categories of etiologic factors variable element and described target because the error between variable element is not in described range of error, and described three categories of etiologic factors variable element is when being less than described target because of variable element, the intermediate value choosing the up-to-date correction parameter that numerical value is larger in described 3rd correction parameter and adjacent two up-to-date correction parameters is the 4th correction parameter.

4th because of variable element acquisition module, carries out exposing the 4th of gained the because of variable element for obtaining described goal systems with described 4th correction parameter.

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

In said apparatus, the implementation procedure of the function and efficacy of modules specifically refers to the implementation procedure of corresponding step in said method, does not repeat them here.

For device embodiment, because it corresponds essentially to embodiment of the method, so relevant part illustrates see the part of embodiment of the method.Device embodiment described above is only schematic, the wherein said module illustrated as separating component can or may not be physically separates, parts as module display can be or may not be physical location, namely can be positioned at a place, or also can be distributed on multiple NE.Some or all of module wherein can be selected according to the actual needs to realize the object of the application's scheme.Those of ordinary skill in the art, when not paying creative work, are namely appreciated that and implement.

Those skilled in the art, in consideration description and after putting into practice invention disclosed herein, will easily expect other embodiment of the application.The application is intended to contain any modification of the application, purposes or adaptations, and these modification, purposes or adaptations are followed the general principle of the application and comprised the undocumented common practise in the art of the application or conventional techniques means.Description and embodiment are only regarded as exemplary, and true scope and the spirit of the application are pointed out by claim below.

Should be understood that, the application is not limited to precision architecture described above and illustrated in the accompanying drawings, and can carry out various amendment and change not departing from its scope.The scope of the application is only limited by appended claim.

Claims

1. a correction parameter defining method, be applied to auto-exposure control AEC and correct, it is characterized in that, described method comprises:

2. method according to claim 1, is characterized in that, described method also comprises:

If described first because variable element and described target be not because the error between variable element is in described range of error, obtain with described Theoretical Correction parameter and described first because of variable element corresponding approach step-length;

Calculate that described Theoretical Correction parameter and the described N approaching step-length are doubly worth and, generate M up-to-date correction parameter, wherein, N is the integer of 1 to M, M be more than or equal to 1 integer;

Obtain described goal systems to carry out AEC according to described M up-to-date correction parameter respectively to correct M of the described M of correspondence up-to-date correction parameter of gained up-to-date because of variable element;

Judge that M is up-to-date because variable element and described target are because the error between variable element is whether in described range of error respectively;

If at least one is up-to-date because variable element and described target are because the error between variable element is in described range of error, by up-to-date for M because of in variable element with described target because of arbitrary up-to-date because of the variable element corresponding up-to-date correction parameter of the error between variable element in described range of error, be defined as mating the target correction parameter of described target because of variable element.

3. method according to claim 2, is characterized in that, described acquisition and described Theoretical Correction parameter and described first because of variable element corresponding approach step-length, comprising:

Using described first because variable element substitutes into described linear fit function as dependent variable, calculating described linear fit argument of function value is the first correction parameter;

4. method according to claim 2, is characterized in that, described method also comprises:

If M is up-to-date because variable element and described target be not because the error between variable element is all in described range of error, up-to-date corresponding to acquisition because of variable element with described target because the difference of variable element is two adjacent up-to-date correction parameters that symbol is contrary;

The intermediate value choosing two adjacent up-to-date correction parameters is the 3rd correction parameter;

Obtain described goal systems and carry out according to described 3rd correction parameter the three categories of etiologic factors variable element that AEC corrects gained;

Judge that described three categories of etiologic factors variable element and described target are because the error between variable element is whether in described range of error;

If described three categories of etiologic factors variable element and described target are because the error between variable element is in described range of error, then determine that described 3rd correction parameter is the target correction parameter of the described target of coupling because of variable element.

5. method according to any one of claim 1 to 4, is characterized in that, before the Theoretical Correction parameter obtaining goal systems, also comprises:

Obtain described linear fit function;

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

Within the scope of the correction parameter preset, choose at least two different correction parameters is sampling correcting parameter;

Obtain described goal systems and carry out each sampling of AEC correction gained because of variable element according to each sampling correcting parameter respectively;

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

8. method according to claim 7, it is characterized in that, when described default correction parameter is ionization chamber left field compensation parameter or ionization chamber right field compensation parameter, the described goal systems of described acquisition is carried out AEC according to described Theoretical Correction parameter and is corrected first of gained because of variable element, comprising:

9. method according to claim 7, is characterized in that, when described default correction parameter is the ionization chamber reference voltage of KV breakpoint, the described goal systems of described acquisition is carried out AEC according to described Theoretical Correction parameter and corrected first of gained because of variable element, comprising:

10. a correction parameter determining device, be applied to auto-exposure control AEC and correct, it is characterized in that, described device comprises:

11. devices according to claim 10, is characterized in that, described device also comprises:

Approach step-length acquisition module, for described first because variable element and described target are because of when the error between variable element is not in described range of error, obtain with described Theoretical Correction parameter and described first because of variable element corresponding approach step-length;

Up-to-date correction parameter computing module, for calculate that described Theoretical Correction parameter and the described N approaching step-length are doubly worth and, generate M up-to-date correction parameter, wherein, N is the integer of 1 to M, M be more than or equal to 1 integer;

Up-to-date because of variable element acquisition module, carry out AEC according to described M up-to-date correction parameter respectively for obtaining described goal systems to correct M of the described M of correspondence up-to-date correction parameter of gained up-to-date because of variable element;

Up-to-date because of variable element judge module, for judging that M is up-to-date because variable element and described target are because the error between variable element is whether in described range of error respectively;

3rd parameter determination module, for up-to-date because variable element and described target are because of when the error between variable element is in described range of error at least one, by up-to-date for M because of in variable element with described target because of arbitrary up-to-date because of the variable element corresponding up-to-date correction parameter of the error between variable element in described range of error, be defined as mating the target correction parameter of described target because of variable element.

12. devices according to claim 11, is characterized in that, described in approach step-length acquisition module and comprise:

First correction parameter computing module, for using described first because variable element substitutes into described linear fit function as dependent variable, calculating described linear fit argument of function value is the first correction parameter;

13. devices according to claim 11, is characterized in that, described device also comprises:

Adjacent parameter acquisition module, for up-to-date because variable element and described target are because of when the error between variable element is all not in described range of error at M, up-to-date corresponding to acquisition because of variable element with described target because the difference of variable element is two adjacent up-to-date correction parameters that symbol is contrary;

3rd correction parameter acquisition module is the 3rd correction parameter for choosing the intermediate value of two adjacent up-to-date correction parameters;

Three categories of etiologic factors variable element acquisition module, carries out exposing the three categories of etiologic factors variable element of gained with described 3rd correction parameter for obtaining described goal systems;

Three categories of etiologic factors variable element judge module, for judging that described three categories of etiologic factors variable element and described target are because the error between variable element is whether in described range of error;

4th parameter determination module, in described three categories of etiologic factors variable element and described target because of when the error between variable element is in described range of error, determine that described 3rd correction parameter is the target correction parameter of the described target of coupling because of variable element.

14., according to claim 10 to the device according to any one of 13, is characterized in that, described device also comprises:

Function acquisition module, for obtaining described linear fit function;

15. devices according to claim 14, is characterized in that, described function acquisition module comprises:

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

Sampling, because of variable element acquisition module, carries out each sampling of AEC correction gained because of variable element according to each sampling correcting parameter respectively for obtaining described goal systems;

16. devices according to claim 14, it is characterized in that, described goal systems is DR system, described default correction parameter is the ionization chamber reference voltage of ionization chamber left field compensation parameter, the right field compensation parameter of ionization chamber or KV breakpoint, and described presetting should be the mAs feedback quantity of the left field of ionization chamber, the mAs feedback quantity of the right field of ionization chamber or image averaging gray scale mutually because of variable element.

17. devices according to claim 16, is characterized in that, when described default correction parameter is ionization chamber left field compensation parameter or ionization chamber right field compensation parameter, described first comprises because of variable element acquisition module:

18. devices according to claim 16, is characterized in that, when described default correction parameter is the ionization chamber reference voltage of KV breakpoint, described first comprises because of variable element acquisition module:

19. 1 kinds of correction parameter determination equipment, are applied to auto-exposure control AEC and correct, it is characterized in that, comprising:

Processor; For storing the memorizer of described processor executable;

Wherein, described processor is configured to: