Research Article

Multidirectional Gradient Neighbourhood-Weighted Image Sharpness Evaluation Algorithm

Table 1

Quantitative evaluation results of sharpness evaluation algorithm for the image sequence.

Sharpness evaluation algorithmSteepness width Steepness Flat area fluctuation Sensitivity Average calculation time (ms)

Gray variance function4430.00250.052070.020250.744
Brenner930.019050.027480.038291.400
Roberts740.023830.023820.034171.410
Vollath3030.005930.037330.017980.598
Prewitt3370.005320.044040.018051.299
Laplace2480.007150.057640.1480031.619
Tenengrad3370.005330.043940.018224.570
Entropy function4230.004190.059100.006911.240
Fourier transform2360.007620.040890.0202611.418
DCT transformation4600.002740.048690.003441.995
Wavelet transform3400.005260.048830.0192333.875
Proposed method570.031400.016180.245956.209