Smart Meter Data Analytics by Yi Wang & Qixin Chen & Chongqing Kang

Author:Yi Wang & Qixin Chen & Chongqing Kang
Language: eng
Format: epub
ISBN: 9789811526244
Publisher: Springer Singapore

(5.55)

(5.56)

(5.57)

Then the luminance, contrast and structure comparison measurement are given as follows

(5.58)

(5.59)

(5.60)

where , and are small constants given by

(5.61)

respectively. In the formula above, L is the maximum load values, and , are two scalar constants. In this chapter, we set and , which is found to be suitable for a variety of datasets. Then the SSIM index is defined as:

(5.62)

Value of the SSIM is between 0 and 1. When two images are similar, their SSIM is close to 1.

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