aopicroi

The aopicroi function returns mean values of the region of interest (ROI) in the field of view defined with a binary mask in an \alpha-opic image data from the \alpha\Omega-meter. The averaging of the radiance values requires the solid angle information per pixel, provided with an omega angle file.

Usage:

[aopicroi,sc,mc,lc,rh,mel,VL] = aopicroi(aoim,mask,omega)

Where:

Parameter	Description
aopicroi	Is a vector containing the \alpha-opic spatial integral values of the region of interest.
sc,mc,lc,rh,mel,VL	Represent the \alpha-opic channels sc, mc, lc, rh, mel and V(\lambda).
aoim	Represents the \alpha\Omega-meter image data.
mask	Is a binary image mask specifying the region of interest.
omega	Is an image matrix specifying the pixel’s solid angles.

Example

Evaluate the spatial integral values from the left eye field of view:

% read ao-meter image data
aoim = readaopic('image.aop');

% load default ao-meter angles
load('aometerangles.mat');

% create left eye field of view mask
mask = fieldofview(theta,rho,'left');

% evaluete spatial integral aopic values
aopic = aopicroi(aoim,mask,omega,rho)

See also: readaopic, fieldofview

Result

aopicroi =

   1.0e+05 *

  0.0013    0.0033    0.0039    0.0032    0.0024    2.3744

Note: the \alpha\Omega-meter example data is not calibrated.

Reference:

Frederic Rudawski, Development of a wearable, low-cost, spatially and α-opic resolving light dosimeter, Dissertation, Technische Universität Berlin, In: DepositOnce, 2024, DOI: 10.14279/depositonce-22010.

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