Table 7 PSNR and RMSE for sample images of turned surfaces.

From: Image-processing-based model for surface roughness evaluation in titanium based alloys using dual tree complex wavelet transform and radial basis function neural networks

Sl no.

Performance metric

DTCWT method

DTCWT image fusion method

DTCWT image fusion with PSO method

1

PSNR

26.9423

26.9441

43.3082

RMSE

0.0155

0.0155

0.0025

2

PSNR

22.6628

28.5809

42.0238

RMSE

0.0164

0.0113

0.0019

3

PSNR

21.8979

21.9115

33.4397

RMSE

0.0194

0.0194

0.0085

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