Quality Prediction of DWT-Based Compression for Remote Sensing Image Using Multiscale and Multilevel Differences Assessment Metric

Figure 3

Classifying pixels according to gradient magnitudes with different threshold. (a) The original image; (b) 𝛽=0.01; (c) 𝛽=0.02; (d) 𝛽=0.04.

(a)

(b)

(c)

(d)