CN105657271A - LabVIEW-based EMCCD camera data acquisition driving method - Google Patents

LabVIEW-based EMCCD camera data acquisition driving method Download PDF

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CN105657271A
CN105657271A CN201610067507.8A CN201610067507A CN105657271A CN 105657271 A CN105657271 A CN 105657271A CN 201610067507 A CN201610067507 A CN 201610067507A CN 105657271 A CN105657271 A CN 105657271A
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function
labview
atmcd32d
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CN105657271B (en
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张闻文
李梦颖
陈钱
顾国华
何伟基
路东明
于雪莲
任侃
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Nanjing University of Science and Technology
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
    • H04N23/60—Control of cameras or camera modules
    • H04N23/66—Remote control of cameras or camera parts, e.g. by remote control devices
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
    • H04N23/60—Control of cameras or camera modules
    • H04N23/64—Computer-aided capture of images, e.g. transfer from script file into camera, check of taken image quality, advice or proposal for image composition or decision on when to take image

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  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Studio Devices (AREA)

Abstract

The invention discloses a LabVIEW-based EMCCD camera data acquisition driving method. The LabVIEW-based EMCCD camera data acquisition driving method comprises the steps: firstly invoking a camera internal function to initialize a camera; setting the mode of each module of the camera; computing relative photography parameters of the camera, thereby obtaining the pixel size of a camera detector; developing an image storage array; then, setting a For cycle to perform image acquisition and implement a pausing function; finally, invoking a ShutDown command function to release the memory space. According to the LabVIEW-based EMCCD camera data acquisition driving method, a great deal of unnecessary function invocation is reduced, so that a program is greatly simplified; the camera does not utilize only Solis software of the Andor company any more, but can combine other LabVIEW-driving hardware to achieve different purposes of data acquisition, image processing and the like, thereby overcoming a defect that the Solis software cannot be connected with the LabVIEW in use; the use range is wider; besides, purposes that the number of photographed frames of the camera is freely controlled and details of a current single-frame image can be viewed under the condition that the photography of the camera is not stopped but pauses are achieved.

Description

A kind of EMCCD camera data based on LabVIEW gathers driving method
Technical field
The invention belongs to the acquisition technology of electron multiplication CCD imaging system, particularly a kind of EMCCD camera data based on LabVIEW gathers driving method.
Background technology
Along with developing rapidly of scientific information technology, the world has stepped into the epoch of photon, and people obtain the means of information and extending to broader fields such as different-wavebands. Image information, as the most direct maximally effective information, has obtained extensive attention. How to obtain apparent image information more accurately, become important research contents. Low-light level imaging technology has complied with this development trend just, becomes one of dual-use emerging high-tech that developed country of the world today greatly develops.
Electron multiplication CCD (ElectronMultiplicationChargeCoupledDevice, EMCCD) it is the high-end photodetection product of one that in field of detecting, sensitivity is high, as novel all solid state micro-opto image device, have that volume is little, life-span length, quantum efficiency are high, low in energy consumption, sensitivity advantages of higher compared to tradition low-light level imaging device, there are very big development potentiality and application prospect in low-light level imaging field, are illustrated in figure 1 electron multiplication CCD structural representation. But the existence of existing electron multiplication CCD camera inevitably has the drawback that: data read-out mode is limited, it is impossible to be connected use with other hardware, causes use scope very limited.
LabVIEW is a kind of programming development environment, developed by American National instrument (NI) company, it is similar to C and BASIC development environment, but the significant difference of LabVIEW and other computer languages is: other computer languages are all adopt text based language to produce code, and LabVIEW uses graphical author language G coding, the program of generation is the form of block diagram. LabVIEW development environment is integrated with all instruments needed for engineer and the various application of scientist's rapid build, it is intended to help engineer and scientist to solve problem, increase productivity and constantly bring forth new ideas.But how utilizing LabVIEW software is also a big technical barrier to connect EMCCD camera, the shooting successfully controlling EMCCD camera and data acquisition.
Although Andor company provides Solis software, it is possible to is connected with camera and shoots, but its use scope is only restricted in software itself, it is impossible to combine with follow-up data processing hardware, only capable of taking pictures, acts on single, it does not have real-time. Secondly, when camera breaks down, it is impossible to know failure cause easily. In addition, just cannot be attached thereto when experiment is based on LabVIEW and carry out data acquisition, also just cannot realize controlling shooting frame number and suspending the function checked, and LabVIEW is the bridge connecting imaging system, image processing system hardware, therefore has sizable technological deficiency.
Summary of the invention
It is an object of the invention to provide a kind of EMCCD camera data based on LabVIEW and gather driving method.
The technical solution realizing the object of the invention is: a kind of EMCCD camera data based on LabVIEW gathers driving method, first calls camera internal function, camera is initialized; Secondly, the pattern of each module of camera is set; Then calculate the relevant acquisition parameters of camera, obtain camera detector pixel size; Open up image-storage array; Again, For circulation is set, carries out image acquisition and realize pause function; Finally call ShutDown command functions releasing memory space.
The present invention is compared with prior art, its remarkable advantage: (1) calls initialization function at the very start, initialize and after successfully, carry out work below again, thus simplifying camera initialization times, accelerate response time, there is good real-time, reduce much unnecessary function call, make program obtain great simplification. (2) by arranging the next shooting frame number freely controlling camera of N value of the For circulation being added in the command functions calling collected by camera image and transmission image command function. Obtaining the increase For circulation of image command function by giving, the N parameter of increase For circulation can be implemented in can be suspended when not stopping camera shooting, checks the function of any single-frame images details. (3) utilize LabVIEW software interface, camera each several part duty can be checked at any time, increase controllability, it is simple to be quickly found out mistake and amendment. (4) it is no longer limited by using the Solis software of Andor company, and the hardware that camera can drive with other LabVIEW can be made to combine, reach the different purpose such as data acquisition, image procossing, compensate for Solis and can not be connected the defect used with LabVIEW, use wider, there is higher practical value, reach freely to control the shooting frame number of camera simultaneously, can suspend, when not stopping camera shooting, the purpose checking current single-frame images details.
Below in conjunction with accompanying drawing, the present invention is described in further detail.
Accompanying drawing explanation
Fig. 1 is electron multiplication CCD structural representation.
Fig. 2 is the schematic flow sheet of the present invention.
Detailed description of the invention
In conjunction with Fig. 2, the present invention gathers driving method based on the EMCCD camera data of LabVIEW, first calls camera internal function, camera is initialized; Secondly, the pattern of each module of camera is set; Then calculate the relevant acquisition parameters of camera, obtain camera detector pixel size; Open up image-storage array; Again, For circulation is set, carries out image acquisition and realize pause function; Finally call ShutDown command functions releasing memory space.Realize specifically comprising the following steps that of said process
Step one, by USB interface, connects camera and computer, determines camera successful connection by NIMAX.
Step 2, opens LabVIEW, creates built-in function node, calls the Initialize function in atmcd32d.dll library file, camera is initialized.
Step 3, arranges each functions of modules pattern of camera, including shutter mode, aperture pattern, read mode and data acquisition, namely in LabVIEW, set up sequential organization, each sequence is used for arranging a functional mode, arranging sequentially arbitrarily of all patterns, and concrete operations are as follows:
(1) call the SetTriggerMode function setup camera shutter pattern in the library file atmcd32d.dll in SDK, input a constant 0 to SetTriggerMode function, namely apply the internal trigger pattern of camera;
(2) call the SetGateMode function setup camera aperture pattern in the library file atmcd32d.dll in SDK, input a constant 3 to SetGateMode function, even if camera aperture is always on;
(3) calling the SetReadMode function setup camera read mode in the library file atmcd32d.dll in SDK, input a constant 4 to SetReadMode function, namely application camera reads image;
(4) call the obtaining mode of SetAcquisi-tionMode function setup camera in the library file atmcd32d.dll in SDK, input a constant 1 to SetAcquisitionMode function, be i.e. application camera SingleScan pattern.
Step 4, arranges camera relevant parameter, and including time of exposure and gain size, concrete operations are as follows:
(1) calling the time of exposure of SetExposure-Time function setup camera in the library file atmcd32d.dll in SDK, exposure time values is arranged on 0.02 can obtain best shooting effect;
(2) calling the SetEMGainMode function setup camera gain size in the library file atmcd32d.dll in SDK, yield value ranges for 0��300, according to oneself needing to arrange, obtains camera detector pixel information.
Step 5, transmission information-setting by user to camera, calculates camera shooting single frames and requires time for, i.e. the summation of time of exposure, integration time and Kinetic cycle time, and user setup gain time. Concrete operations are as follows:
(1) call the GetEMCCDGain function in the library file atmcd32d.dll in SDK, make camera obtain the gain size of user setup;
(2) the GetAcquisitionTimings function in the library file atmcd32d.dll in SDK is called, camera is made to obtain the time of exposure of user setup, and calculate the total time that shooting one frame needs, wherein total time is the summation of AccumulateCycleTime, KineticcycleTime and time of exposure, and AccumulateCycleTime and KineticcycleTime is all set to 0 under SingleScan pattern.
Step 6, obtains camera detector pixel information, namely calls the GetDetector function in the library file atmcd32d.dll in SDK, obtains detector pixel count horizontally and vertically.
Step 7, uses the initialization matrix functions of LabVIEW to open up one piece of internal memory in advance, arranges the initial memory address obtaining image. The initialization matrix functions using LabVIEW opens up one piece of internal memory in advance, then the SetImage function in the library file atmcd32d.dll in SDK is called, the value arranging parameter Horz.Binning is 1, the value arranging parameter Vert.binning is 1, the value arranging Horz.Start is 1, and the value arranging Vert.start is 1.
Step 8, arranges For circulation, called after FOR1, calls command functions and the transmission image command function of collected by camera image, carry out continuous acquisition, and stored in the array opened up in advance by the image of collection in FOR1 cyclical function. For circulation is set, called after FOR1, FOR1 calls the data transfer function GetAcquiredData function starting shooting order StartAcquisition function and camera of camera, the Transfer-matrix opened up in advance to GetAcquiredData function and is exported by GetAcquiredData function and shows image.
Step 9, increases For circulation, called after FOR2 to camera data transmission explicit function, realizes suspending in shooting way by increasing the N parameter of FOR2 circulation, check the details function of current single-frame images. Arranging For circulation, called after FOR2, the N making FOR2 is 1, then be shown as the image being continually changing; Make N >=5000, be then shown as current single-frame images, thus playing the effect of time-out.
All first return values calling function are exported and demonstrate the image clapped in the front panel of LabVIEW by step 10.
Step 11, calls ShutDown command functions releasing memory space, closes camera.
The function that the inventive method is called is all from the software development kit that Andor company provides.
Embodiment
The present invention is with the EMCCD camera of Andor company, if Luca camera is that example illustrates.
1, by USB interface, connect Luca camera and computer, determine camera successful connection by NIMAX.
2, open LabVIEW, create built-in function node, call the Initialize function in the atmcd32d.dll library file that Andor company provides, camera is initialized.
3, camera function pattern is set, including shutter mode, aperture pattern, read mode and data acquisition. That is: setting up sequential organization in LabVIEW, each sequence is used for arranging a functional mode, and arranging of all patterns sequentially can be any. Concrete operations are as follows:
(1) call the SetTriggerMode function setup camera shutter pattern in the library file atmcd32d.dll in Andor company SDK, input a constant 0 to SetTriggerMode function, namely apply the internal trigger pattern of camera.
(2) call the SetGateMode function setup camera aperture pattern in the library file atmcd32d.dll in Andor company SDK, input a constant 3 to SetGateMode function, even if camera aperture is always on.
(3) calling the SetReadMode function setup camera read mode in the library file atmcd32d.dll in Andor company SDK, input a constant 4 to SetReadMode function, namely application camera reads image.
(4) obtaining mode of SetAcquisi-tionMode function setup camera in the library file atmcd32d.dll in Andor company SDK is called, a constant 1, corresponding application camera SingleScan pattern is inputted to SetAcquisitionMode function.
4, camera parameter is set, including time of exposure and gain size. Concrete operations are as follows:
(1) calling the time of exposure of SetExposure-Time function setup camera in the library file atmcd32d.dll in Andor company SDK, exposure time values is arranged on 0.02 can obtain best shooting effect.
(2) calling the SetEMGainMode function setup camera gain size in the library file atmcd32d.dll in Andor company SDK, yield value ranges for 0��300, according to oneself needing to arrange, can obtain camera detector pixel information.
5, transmission information-setting by user is to camera, needs total time and user setup gain time including calculating camera shooting single frames. Concrete operations are as follows:
(1) call the GetEMCCDGain function in the library file atmcd32d.dll in Andor company SDK, make camera obtain the gain size of user setup.
(2) the GetAcquisitionTimings function in the library file atmcd32d.dll in Andor company SDK is called, camera is made to obtain the time of exposure of user setup, and calculate the total time that shooting one frame needs, wherein total time is the summation of AccumulateCycleTime, KineticcycleTime and time of exposure, and AccumulateCycleTime and KineticcycleTime is all set to 0 under SingleScan pattern.
6, camera detector pixel information is obtained. Namely call the GetDetector function in the library file atmcd32d.dll in Andor company SDK, obtain detector pixel count horizontally and vertically.
7, use the initialization matrix functions of LabVIEW to open up one piece of internal memory in advance, the initial memory address obtaining image is set. Concrete operations are as follows:
(1) the SetImage function in the library file atmcd32d.dll in Andor company SDK is called, the value arranging parameter Horz.Binning is 1, the value arranging parameter Vert.binning is 1, and the value arranging Horz.Start is 1, and the value arranging Vert.start is 1.
8, For circulation, called after FOR1 are set. Concrete operations are as follows:
(1) in FOR1, call the data transfer function GetAcquiredData starting to shoot command functions StartAcquisition and camera of camera.
(2) Transfer-matrix opened up in advance to GetAcquiredData function and is exported by GetAcquiredData function and shows image.
9, For circulation, called after FOR2 are increased to camera data transmission explicit function. The N making FOR2 is 1, then be shown as the image being continually changing; Making N is 10000, then be shown as current single-frame images, thus playing the effect of time-out.
10, all first return values calling function are exported and show. All first return values calling function are exported and demonstrate the image clapped in the front panel of LabVIEW.
11, call ShutDown command functions releasing memory space, close camera.

Claims (9)

1. the EMCCD camera data based on LabVIEW gathers driving method, it is characterised in that first call camera internal function, camera is initialized; Secondly, the pattern of each module of camera is set; Then calculate the relevant acquisition parameters of camera, obtain camera detector pixel size; Open up image-storage array; Again, For circulation is set, carries out image acquisition and realize pause function; Finally call ShutDown command functions releasing memory space.
2. the EMCCD camera data based on LabVIEW according to claim 1 gathers driving method, it is characterised in that implement step as follows:
Step one, by USB interface, connects camera and computer, determines camera successful connection by NIMAX;
Step 2, opens LabVIEW, creates built-in function node, calls the Initialize function in atmcd32d.dll library file, camera is initialized;
Step 3, arranges each functions of modules pattern of camera, including shutter mode, aperture pattern, read mode and data acquisition;
Step 4, arranges camera relevant parameter, including time of exposure and gain size;
Step 5, transmission information-setting by user to camera, calculates camera shooting single frames and requires time for, i.e. the summation of time of exposure, integration time and Kinetic cycle time, and user setup gain time;
Step 6, obtains camera detector pixel information;
Step 7, uses the initialization matrix functions of LabVIEW to open up one piece of internal memory in advance, arranges the initial memory address obtaining image;
Step 8, arranges For circulation, called after FOR1, calls command functions and the transmission image command function of collected by camera image, carry out continuous acquisition, and stored by the image of collection in the array opened up in advance in FOR1 cyclical function;
Step 9, increases For circulation, called after FOR2 to camera data transmission explicit function, realizes suspending in shooting way by increasing the N parameter of FOR2 circulation, check the details function of current single-frame images;
All first return values calling function are exported and demonstrate the image clapped in the front panel of LabVIEW by step 10;
Step 11, calls ShutDown command functions releasing memory space, closes camera.
3. the EMCCD camera data based on LabVIEW according to claim 2 gathers driving method, it is characterized in that in step 3, camera function pattern is set, including shutter mode, aperture pattern, read mode and data acquisition, namely in LabVIEW, set up sequential organization, each sequence is used for arranging a functional mode, arranging sequentially arbitrarily of all patterns, and concrete operations are as follows:
(1) call the SetTriggerMode function setup camera shutter pattern in the library file atmcd32d.dll in SDK, input a constant 0 to SetTriggerMode function, namely apply the internal trigger pattern of camera;
(2) call the SetGateMode function setup camera aperture pattern in the library file atmcd32d.dll in SDK, input a constant 3 to SetGateMode function, even if camera aperture is always on;
(3) calling the SetReadMode function setup camera read mode in the library file atmcd32d.dll in SDK, input a constant 4 to SetReadMode function, namely application camera reads image;
(4) call the obtaining mode of SetAcquisi-tionMode function setup camera in the library file atmcd32d.dll in SDK, input a constant 1 to SetAcquisitionMode function, be i.e. application camera SingleScan pattern.
4. the EMCCD camera data based on LabVIEW according to claim 2 gathers driving method, it is characterised in that in step 4, arranging camera parameter, including time of exposure and gain size, concrete operations are as follows:
(1) calling the time of exposure of SetExposure-Time function setup camera in the library file atmcd32d.dll in SDK, exposure time values is arranged on 0.02 can obtain best shooting effect;
(2) calling the SetEMGainMode function setup camera gain size in the library file atmcd32d.dll in SDK, yield value ranges for 0��300, according to oneself needing to arrange, obtains camera detector pixel information.
5. the EMCCD camera data based on LabVIEW according to claim 2 gathers driving method, it is characterized in that in step 5, transmission information-setting by user, to camera, needs total time and user setup gain size including calculating camera shooting single frames, and concrete operations are as follows:
(1) call the GetEMCCDGain function in the library file atmcd32d.dll in SDK, make camera obtain the gain size of user setup;
(2) the GetAcquisitionTimings function in the library file atmcd32d.dll in SDK is called, camera is made to obtain the time of exposure of user setup, and calculate the total time that shooting one frame needs, wherein total time is the summation of AccumulateCycleTime, KineticcycleTime and time of exposure, and AccumulateCycleTime and KineticcycleTime is all set to 0 under SingleScan pattern.
6. the EMCCD camera data based on LabVIEW according to claim 2 gathers driving method, it is characterized in that in step 6, obtain camera detector pixel information, namely call the GetDetector function in the library file atmcd32d.dll in SDK, obtain detector pixel count horizontally and vertically.
7. the EMCCD camera data based on LabVIEW according to claim 2 gathers driving method, it is characterized in that in step 7, the initialization matrix functions using LabVIEW opens up one piece of internal memory in advance, then the SetImage function in the library file atmcd32d.dll in SDK is called, the value arranging parameter Horz.Binning is 1, the value arranging parameter Vert.binning is 1, and the value arranging Horz.Start is 1, and the value arranging Vert.start is 1.
8. the EMCCD camera data based on LabVIEW according to claim 2 gathers driving method, it is characterized in that in step 8, For circulation is set, called after FOR1, FOR1 calls the data transfer function GetAcquiredData function starting shooting order StartAcquisition function and camera of camera, the Transfer-matrix opened up in advance to GetAcquiredData function and is exported by GetAcquiredData function and shows image.
9. the EMCCD camera data based on LabVIEW according to claim 2 gathers driving method, it is characterised in that in step 9, arranges For circulation, called after FOR2, and the N making FOR2 is 1, then be shown as the image being continually changing; Make N >=5000, be then shown as current single-frame images, thus playing the effect of time-out.
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