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A Prototype Optical Tracking System Investigation and Development - page 96 / 170

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82

Field Name

Destination ID Timestamp

Sender ID Packet ID Centroid ID ROI X

ROI Y

X Numerator

Y Numerator

Pixel Sum

Pixel Count

ROI Width ROI Height Max

Communications

Field Description

The Soft Hub’s ID

n integer representing the time that the packet was constructed

The module’s ID ’C’ for centroid unique ID for the centroid

The X co-ordinate of the upper left corner of the ROI

The Y co-ordinate of the upper left corner of the ROI

The numerator in the fraction that describes the X coordinate, i.e., X = X Numerator Pixel Sum

The numerator in the fraction that describes the Y coordinate, i.e., Y = Y Numerator Pixel Sum

The sum of pixel values that are above the signal threshold within the ROI

The number of pixels that are above the signal threshold in the ROI

The ROI width The ROI height

The maximum pixel intensity of the marker image

Integer

8

Character

8

Integer

16

Integer

16

Field

Field

Type

Size in

Bits

Integer

8

Integer

32

Integer

8

Integer

8

Integer

8

Integer

16

Integer

32

Integer

32

Integer

32

Integer

16

Table 6.1 Fields within a centroid packet.

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