US 11,908,116 B2 · Scaled PSNR for image quality assessment

Abstract

The scaled Peak Signal-to-Noise Ratio (PSNR) method scales PSNR to 1.00 or 100% from infinite decibel values. The PSNR describes the ratio between the maximum possible value (power) of a signal and the power of signal's noise. Noise affects the quality of its representation. Signals dynamically fluctuate from the smallest to largest possible quantity. The unsettled range to maximum from minimum values of the noise is unknown. Therefore, the PSNR usually forms on a logarithmic way (log) of describing a ratio, the decibel (dB). The dB is able to gauge the level of power, communication signal (intensity or voltage), sound pressure, and intensity of several other items including images.

Claims12

Dependent claims

A method programmed in a non-transitory memory of a device, the method comprising:

acquiring a first image and a second image;
comparing the first image and the second image using a scaled Peak Signal-to-Noise Ratio (sPSNR) to generate an image quality assessment value;
comparing the image quality assessment value with a threshold, wherein the sPSNR is utilized for computer vision for machine learning, wherein the sPSNR is based on the equation:
sPSNR
=
10
⁢
log
⁡
(
c
0
⁢
MAX
4
1
+
MSE
)
.
wherein c0 is a scale factor, MAX is a maximum possible pixel value, and MSE is a mean squared error;
comparing luminance, contrast and one or more structures in the first image and the second image to generate a structural similarity index;
and
combining the sPSNR and the structural similarity index to determine whether the first image and the second image match.

21 more elements

Dependencies are inferred from the claim text.

Scaled PSNR for image quality assessment

Life of this patent

Scaled PSNR for image quality assessment

Life of this patent

Abstract

Claims12