Validation and Reliability of Sizestream 3D Scanner …
15
200 cm and least count 1.0 mm) was used. A mirror behind the subject was fitted on
the wall to ensure the correct landmark positioning and placement of measuring tape.
The entire exercise of taking manual body measurements was conducted under the
guidance of an observer having more than 20 years of experience in anthropometry
and anthropology.
Anthropometric measurements are automatically collected through the use
of 3D whole-body scanning technology. The technology used was infrared technology by SS14 3D Body scanning Sizestream. The protocol followed while 3D
scanning was as per ISO20685:2005. The scanner was duly calibrated at the start of
the exercise on each day as per the procedure prescribed by the manufacturer. Each
of the subject was measured thrice using 3D Scanning (1 scanner scanned each of
the subject 3 times). To ensure precise 3D body measurement while scanning, each
of the subjects were provided specially designed scan suits made of a material with
enough stretch to avoid any body compression as well as any kind of slackness or
looseness from the body. During 3D scanning process, the subjects were asked to
maintain the posture by holding their breath in an exhaled position as prescribed in
ISO 20685:2010-11.
This resulted in a total of seven (07) data points for each of the body dimension (03
data points from 3D scanning as each of the subject was scanned thrice, and 04 data
points from manual scanning, wherein each of the subject was manually measured
twice by each of the two measurers).
3.2 Data Preparation
Step 1. 3D scans (done thrice) for each of the subject.
Step 2. Manual measurements (done twice by each of the two measurers) for each
of the subject.
Step 3. Recording and storing 3D scan data and manual measurement data of each
subject (for all the prescribed dimensions) in the MS Excel sheet/SPSS file.
3.3 Data Analysis
Step 1. Differences between the 3 measures derived from the scanner and 4 measures
provided by the manual measures were computed. There are 12 combinations of
the same for each measure and for a particular subject. The mean difference was
calculated by averaging all the differences between the scanner measurements and
the average measurements taken manually [1]. The differences were checked using
the test methods given in Clause 5 of ISO 20685:2005 [2, 4].
15
200 cm and least count 1.0 mm) was used. A mirror behind the subject was fitted on
the wall to ensure the correct landmark positioning and placement of measuring tape.
The entire exercise of taking manual body measurements was conducted under the
guidance of an observer having more than 20 years of experience in anthropometry
and anthropology.
Anthropometric measurements are automatically collected through the use
of 3D whole-body scanning technology. The technology used was infrared technology by SS14 3D Body scanning Sizestream. The protocol followed while 3D
scanning was as per ISO20685:2005. The scanner was duly calibrated at the start of
the exercise on each day as per the procedure prescribed by the manufacturer. Each
of the subject was measured thrice using 3D Scanning (1 scanner scanned each of
the subject 3 times). To ensure precise 3D body measurement while scanning, each
of the subjects were provided specially designed scan suits made of a material with
enough stretch to avoid any body compression as well as any kind of slackness or
looseness from the body. During 3D scanning process, the subjects were asked to
maintain the posture by holding their breath in an exhaled position as prescribed in
ISO 20685:2010-11.
This resulted in a total of seven (07) data points for each of the body dimension (03
data points from 3D scanning as each of the subject was scanned thrice, and 04 data
points from manual scanning, wherein each of the subject was manually measured
twice by each of the two measurers).
3.2 Data Preparation
Step 1. 3D scans (done thrice) for each of the subject.
Step 2. Manual measurements (done twice by each of the two measurers) for each
of the subject.
Step 3. Recording and storing 3D scan data and manual measurement data of each
subject (for all the prescribed dimensions) in the MS Excel sheet/SPSS file.
3.3 Data Analysis
Step 1. Differences between the 3 measures derived from the scanner and 4 measures
provided by the manual measures were computed. There are 12 combinations of
the same for each measure and for a particular subject. The mean difference was
calculated by averaging all the differences between the scanner measurements and
the average measurements taken manually [1]. The differences were checked using
the test methods given in Clause 5 of ISO 20685:2005 [2, 4].