Sch"after+Kirchhoff SK1024U3PD Manuel d'utilisateur télécharger pdf (Page 2)

GigE+Ethernet_ZK.indd • Page 15

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11-2014 E

SDK for GigE line scan cameras

Initializing the camera

Allocate memory in the user area

Release memory

Set pointer to user buffer

struct sk_interface

Examples from the class library containing more than 60 ways to

control a

GigE line scan camera

Csk – Base class

Communication structure for the driver

::Camera

::AllocBuffer

::FreeBuffer

::SetUserBufferPtr

::SetIntegrationTime

::SetLineFrequency

::SetSyncMode

::SetGain

::SetOffset

Set integration time (ms)

Set line frequency (kHz)

Set synchronization mode

Set camera gain

Set camera offset

Name of current camera

Number of current camera pixels

Current line frequency in kHz

Pointer to data set in user memory

::GetCamType

::GetPixWidth

::GetLineFrequency

::GetUserBufferPtr

::LineScanView

::AreaScanView

CskInit: Csk – Initializing class

CskCtrl: Csk – Control class

::SingleLineScan

::AreaScan

::ContinuousGrab

::GetImage

::StopContinuousGrab

Get a single line scan

Acquire a 2D scan

Start continuous grab

Get single image from a continuous grab

Stop continuous grab

CskRecord: Csk – Acquisition class

CskView: Csk – View class

Display a line scan signal

Display an area scan

CskInfo: Csk – class

The SK91GigE-WIN software package includes

everything needed for a rapid setup of the GigE

camera, the configuration tool

SKGigEconﬁg, as

well as the software development kit (SDK) with

DLLs and class libraries for de ve lopment of

application software. The Windows 7 (x64, x86)

/ Vista (x64, x86) and XP operating systems are

supported.

The

SkLineScan

program recog nizes the

connected line scan cameras automatically

and organizes the camera IDs according to

the increasing values of their individual MAC

addresses

The oscillos cope display

of the line scan

signal, with zoom function

, is an important tool for

aligning the optical sys-

tem. Controls for integra-

tion time, gain and offset

allow the online configu-

ration of the camera.

2-dimensional area scans

can easily be performed

using the

SkLineScan

program

. Simply spe-

cify the number of line

scans to be integrated

into the scan to produce a

desired area scan.

The zoom function allows

the magnification of inte-

resting areas

and full

or partial images can be

stored as bitmaps.

For color line scan came-

ras, a white balance cor-

rection is necessary and

the shading correction

procedure described on

this page provides this

capability.

The various synchroni-

zation procedures allow

images to be acquired

either stepwise per line

(

LineSync) or per area

(

FrameSync) using an ex-

ternal trigger, according

to the particular require-

ments of the customer or

the image aquisition ap-

plication.

GigE SK7500GTO

Flow of camera image acquisition

Start-up and status window of the SkLineScan program

Oscilloscope display of a line scan signal

Zooming to a region of interest (yellow) in the line scan signal

Area Scan using the line scan camera SK6288GKOC-L

Zooming to a particular area of interest

Shading Correction function in the SkLineScan program

Software SK91GigE-WIN, SkLineScan Program

Shading Correction with the SkLineScan program

Shading correction is a procedure used for compensating for the potential sources of variation

in the signal, whether caused by lens vignetting or variations in pixel sensitivity or illumination.

A reference signal for the shading correction is obtained by taking an image of a plain white

surface, so that each individual pixel can be compensated for algorithmically to provide a

maximum overall intensity, depending on the scale (e.g. 4095 for a 12-bit resolution), and

producing an idealized flat signal.

The shading correction

reference values are stored

in the designated shading

correction memory (SCM)

in the camera for future use.

The persistent writing of

the SCM into the camera

memory uses the

GEN<i>CAM command

SkSaveScmToFlash from

the custom feature table.

Shading correction for

color line scan cameras

uses the white balance

method (see

The dialog window for Shading Correction in the

SkLineScan program.

New Reference: Acquisition of a new shading

correction reference set and its storage in the

SCM

Scans: Number of lines for the reference values to

be determined

Minimum: Only the minimum pixel value is used

for scaling

SaveSCM to Flash: Pesistent storage of the

shading correction reference values in the flash

memory of the camera

Save/Load: The shading correction reference

values are written to or read from a file

Create the base class object

pSk = new Csk

Initialize camera

pSkInit = new CskInit, pSkInit->Camera(CamID)

Take control for acquisition of objects

pSkCtrl= new CskCtrl, pSkRecord= new CskRecord

Enter illumination time

pSkCtrl->SetExposureTime((CamID, ms)

Image acquisition

Start acquisition

pSkRecord->ContinuousGrab(CamID, lines)

pSkRecord->WaitForNextImage

ImageProcessing(pSkInfo->GetImagePtr)

Stop acquisition

End

SK91GigE-WIN Order Code

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