Sequoia LISST-HOLO, User Manual

Page: 33 / 73

LISST-
HOLO User’s Guide
33
9 Temperature °C
10 Input Voltage V
11 Exposure N/A
12 Laser Power N/A
13 Laser Photo Diode N/A
14 Brightness N/A
15 Shutter N/A
16 Gain N/A
17 Deployment ID N/A
18 Image Number N/A
19 Number of Particles N/A
20-24 Reserved for Future Use N/A
25 Total Volume
Concentration
µl / l
26-75 Size Distribution µl / l
.MAT file output by HOLO_Batch
If the ‘Save particle statistics (MAT)’ checkbox was selected, a MATLAB .MAT file will be created. The .MAT file can only be
opened up in MATLAB. It contains a structure called PartStats. It has dimensions N

17, where N is the number of particles
detected in the ROI.
The 10 columns have the following information about each particle:
Column # Particle Property Unit
1 Particle Area based on pixel count
μm
2
2 Particle Equivalent Diameter based on pixel count
μm
3 Major Axis Length
μm
4 Minor Axis Length
μm
5 Solidity Dimensionless
6 Eccentricity Dimensionless
7 Filled Area
μm
2
8 Convex Area
1
μm
2
9 Equivalent Convex Area Diameter
μm
10 Particle Volume
μm
3
11 Centroid (X,Y) (from top left of hologram)
2
Pixels
1
The Convex Area is the area, based on pixel count, of all pixels within the convex hull of the particle. The convex hull is the smallest polygon that
can contain the particle.