Table 2 The correlation analysis for the proposed scheme and Ren’s scheme [24]. The experimental images use both the classical binary images and BOSSBase database

Cartoon

Ren’s scheme

0.0252

0.0015

0.0176

Proposed

0.0186

0.0019

0.0084

CAD

Ren’s scheme

0.0266

0.0030

0.0143

Proposed

0.0231

0.0011

0.0120

Texture

Ren’s scheme

0.0110

0.0004

0.0193

Proposed

0.0157

0.0025

0.0087

Mask

Ren’s scheme

0.0256

0.0033

0.0145

Proposed

0.0246

0.0004

0.0104

Handwriting

Ren’s scheme

0.0221

0.0032

0.0155

Proposed

0.0145

0.0034

0.0059

Document

Ren’s scheme

0.0238

0.0025

0.0139

Proposed

0.0178

0.0001

0.0110

BOSSBase

Ren’s scheme

0.0203

0.0027

0.0129

Proposed

0.0140

0.0019

0.0052