Sch"after+Kirchhoff SK1024U3PD Manuel d'utilisateur télécharger pdf (Page 4)

GigE+Ethernet_ZK.indd • Page 17

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11-2014 E

Area scan

The SkGEVTool was specially developed for

controlling the line scan cameras. The

oscilloscope display of the signal provides an

intuitive depiction for adjusting the illumination

time, amplification, lens shutter, focus and

orientation of the line scan camera.

The

SkGEVTool can use either of the Pleora

drivers eBus Optimal or eBus Universal, which

can be downloaded from www.pleora.com after

registering online.

Oscilloscope display of the line signal using

the zoom function. Any alterations to the

illumination time or amplification of the line

scan camera are immediately displayed.

Select Area Scan to perform a 2-dimen-

sional scan of an area. The number of lines

per image to be scanned is selected from

the Device Feature List under

Height in the

ca tegory

Image-SizeControl.

Start with Select/Connect

GEV Device Control

reveals all camera features

in the

GEN<i>CAM

table

A C

Camera control enables the selection of

illumination time and trigger mode

Gain control adjusts the gain and offset

Software

The V series of line scan cameras are 100%

compatible with the

GigE Vision

and

GEN<i>CAM

standards and can be controlled

using any program of choice that supports the

GEN<i>CAM standard.*

The

SkGEVTool, for either Windows** or Linux,

is provided by Schäfter+Kirchhoff for the

commissioning and initial parameterization of

the camera and is available for downloading.

Device Feature Table (selection)

Shading Correction with the SkGEVTool

A line signal from a homogeneous white

surface reveals the typical signal loss at the

extremities through lens vignetting

A line signal after shading correction and

reduction of illumination time

The camera always starts with the last-used shading correction status as default. If

shading correction was deselected when the camera was switched off then the came-

ra starts without shading correction using an unscaled line signal.

A description of the trigger mode is provided on

page 18

Shading correction

* e.g. Common Vision Blox from STEMMER, MIL from Matrox,

NIMAX National INstruments, HALCON from IDS, etc.

** Operating systems: Windows 7 / Vista (32/64 bit) and XP

Line scan

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

permanent writing of the SCM in the camera

uses the command

SkSaveScmToFlash from the

GEN<i>CAM custom features.

When shading correction is active then all

images recorded by the camera are corrected

by the content of the SCM and a fully

compensated signal is produced.

SkGEVTool for Windows and Linux

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Sch"after+Kirchhoff SK1024U3PD Manuel d'utilisateur Page 4

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