MultiCam Boards Documentation > MultiCam Documentation > MultiCam User Guide > Channel Class > Understanding Camera Specification > Camera output Structure with Grablink > Camera LinkŪ Tap Geometry

Camera LinkŪ Tap Geometry

Image geometrical properties

The relevant geometrical properties required to reconstruct the image are:

Naming convention

The following proprietary naming convention is used for the values of the MultiCam parameter TapGeometry:

A tap geometry for area-scan camera is designated by: <TapGeometry> - <TapGeometry>

A tap geometry for line-scan or tdi-line-scan camera is designated by : <TapGeometry>

TapGeometryX is designated by <RegionX>X(<TapX>)(<ExtX)>)


For other values, refer to the tabular decription.

TapGeometryY is designated by <RegionY>Y(<TapY>)(<ExtY)>)

Examples:

Allocation of taps to ports

The camera taps are indexed using following conventional sorting rule: first by increasing values of YStart, then by increasing value of XStart. The tap T1 is the camera tap that exhibits the smallest XStart for the smallest YStart.

Restrictions

Tap geometrical properties

X properties – Tabular definitions

The following tables define the geometrical properties along the X direction:

XStart: X-coordinate of the first pixel column

XEnd: X-coordinate of the last pixel column

XStep: the difference of X-coordinates between consecutive pixel columns; X-step is positive when X-coordinates are increasing along a row; it is negative otherwise.

The tables are classified by number of taps along the X-direction:

One tap
1X

 

 

 

 

 

Tap#

X Start

X End

Step X

Tap1

1

W

1

Two taps
1X2

 

 

 

 

 

Tap#

X Start

X End

Step X

Tap1

1

W-1

2

Tap2

2

W

2

2X

 

 

 

 

 

Tap#

X Start

X End

Step X

Tap1

1

W/2

1

Tap2

W/2+1

W

1

2XE

 

 

 

 

 

Tap#

X Start

X End

Step X

Tap1

1

W/2

1

Tap2

W

W/2+1

-1

2XM

 

 

 

 

 

Tap#

X Start

X End

Step X

Tap1

W/2

1

-1

Tap2

W/2+1

W

1

2XR

 

 

 

 

 

Tap#

X Start

X End

Step X

Tap1

W/2

1

-1

Tap2

W

W/2+1

-1

Four taps
1X4

 

 

 

 

 

Tap#

X Start

X End

Step X

Tap1

1

W-3

4

Tap2

2

W-2

4

Tap3

3

W-1

4

Tap4

4

W

4

2X2

 

 

 

 

 

Tap#

X Start

X End

Step X

Tap1

1

W/2-1

2

Tap2

2

W/2

2

Tap3

W/2+1

W-1

2

Tap4

W/2+2

W

2

2X2E

 

 

 

 

 

Tap#

X Start

X End

Step X

Tap1

1

W/2-1

2

Tap2

2

W/2

2

Tap3

W-1

W/2+1

-2

Tap4

W

W/2+2

-2

2X2M

 

 

 

 

 

Tap#

X Start

X End

Step X

Tap1

W/2-1

1

-2

Tap2

W/2

2

-2

Tap3

W/2+1

W-1

2

Tap4

W/2+2

W

2

4X

 

 

 

 

 

Tap#

X Start

X End

Step X

Tap1

1

W/4

1

Tap2

W/4+1

W/2

1

Tap3

W/2+1

3W/4

1

Tap4

3W/4+1

W

1

4XE

 

 

 

 

 

Tap#

X Start

X End

Step X

Tap1

1

W/4

1

Tap2

W/4+1

W/2

1

Tap3

3W/4

W/2+1

-1

Tap4

W

3W/4+1

-1

4XR

 

 

 

 

 

Tap#

X Start

X End

Step X

Tap1

W/4

1

-1

Tap2

W/2

W/4+1

-1

Tap3

3W/4

W/2+1

-1

Tap4

W

3W/4+1

-1

Eight taps
1X8

 

 

 

 

 

Tap#

X Start

X End

Step X

Tap1

1

W-7

8

Tap2

2

W-6

8

Tap3

3

W-5

8

Tap4

4

W-4

8

Tap5

5

W-3

8

Tap6

6

W-2

8

Tap7

7

W-1

8

Tap8

8

W

8

4X2

 

 

 

 

 

Tap#

X Start

X End

Step X

Tap1

1

W/4-1

2

Tap2

2

W/4

2

Tap3

W/4+1

W/2-1

2

Tap4

W/4+2

W/2

2

Tap5

3W/2+1

3W/4-1

2

Tap6

3W/2+2

3W/4

2

Tap7

3W/4+1

W-1

2

Tap8

3W/4+2

W

2

4X2E

 

 

 

 

 

Tap#

X Start

X End

Step X

Tap1

1

W/4-1

2

Tap2

2

W/4

2

Tap3

W/4+1

W/2-1

2

Tap4

W/4+2

W/2

2

Tap5

3W/4-1

W/2+1

-2

Tap6

3W/4

W/2+2

-2

Tap7

W-1

3W/4+1

-2

Tap8

W

3W/4+2

-2

8X

 

 

 

 

 

Tap#

X Start

X End

Step X

Tap1

1

W/8

1

Tap2

W/8+1

2W/8

1

Tap3

2W/8+1

3W/8

1

Tap4

3W/8+1

4W/8

1

Tap5

4W/8+1

5W/8

1

Tap6

5W/8+1

6W/8

1

Tap7

6W/8+1

7W/8

1

Tap8

7W/8+1

W

1

8XR

 

 

 

 

 

Tap#

X Start

X End

Step X

Tap1

W/8

1

-1

Tap2

2W/8

W/8+1

-1

Tap3

3W/8

2W/8+1

-1

Tap4

4W/8

3W/8+1

-1

Tap5

5W/8

4W/8+1

-1

Tap6

6W/8

5W/8+1

-1

Tap7

7W/8

6W/8+1

-1

Tap8

W

7W/8+1

-1

Ten taps
1X10

 

 

 

 

 

 

 

 

Tap#

X Start

X End

Step X

Y Start*

Y End*

Step Y*

Tap1

1

W-9

8

1

H

1

Tap2

2

W-8

8

1

H

1

Tap3

3

W-7

8

1

H

1

Tap4

4

W-6

8

1

H

1

Tap5

5

W-5

8

1

H

1

Tap6

6

W-4

8

1

H

1

Tap7

7

W-3

8

1

H

1

Tap8

8

W-2

8

1

H

1

Tap9

9

W-1

8

1

H

1

Tap10

10

W

8

1

H

1

Y properties – Tabular definitions

The following tables define the geometrical properties along the Y direction:

The tables are classified by number of taps along Y-direction:

One tap
1Y

 

 

 

 

 

Tap#

X Start

X End

Step X

Tap1

1

H

1

Two taps
1Y2

 

 

 

 

 

Tap#

X Start

X End

Step X

Tap1

1

H-1

2

Tap2

2

H

2

2YE

 

 

 

 

 

Tap#

X Start

X End

Step X

Tap1

1

H/2

1

Tap2

H

H/2+1

-1