Tool Name	Universal Image Quality Index
Tool ID	13
Library ID	imagery_tools
Version	1.0
Author(s)	M.Ambrosi (c) 2017

Description

The Universal Image Quality Index compares two grids (greyscale images) using the three parameters luminance, contrast and structure. This is done for each pixel using a moving window as specified by the kernel radius.

References

Lasaponara, R. & Masini, N. (2012): Image Enhancement, Feature Extraction and Geospatial Analysis in an Archaeological Perspective. In: Lasaponara, R. & Masini, N. [Eds.]: Satellite Remote Sensing - A New Tool for Archaeology, S. 17-64. Springer Link

Wang, Z. & Bovik, A.C. (2002): A universal image quality index. IEEE Signal Processing Letters, vol.9, no.3, pp.81-84. IEEE-Xplore

Parameters

Name	Type	Identifier	Description	Constraints
Input
First Grid	grid, input	GRID_A
Second Grid	grid, input	GRID_B
Output
Universal Image Quality Index	grid, output	QUALITY	The product of correlation, luminance and contrast similarity.
Correlation	grid, output, optional	CORRELATION	The correlation coefficient.
Luminance	grid, output, optional	LUMINANCE	The similarity of mean luminance.
Contrast	grid, output, optional	CONTRAST	The similarity of contrast.
Options
k1	floating point number	K1		Minimum: 0.000000 Maximum: 1.000000 Default: 0.010000
k2	floating point number	K2		Minimum: 0.000000 Maximum: 1.000000 Default: 0.030000
L	integer number	L	The dynamic range for the image pixel, i.e. the number of different grey values.	Minimum: 1 Default: 255
Kernel Type	choice	KERNEL_TYPE	The kernel's shape.	Available Choices: [0] Square [1] Circle Default: 1
Radius	integer number	KERNEL_RADIUS	cells	Minimum: 0 Default: 2