Table 1 The structure of 6 sample features in red color channel of RGB color space

0.917462178

0

0.646102982

0.388763198

0.037210395

0.011219957

0.95077049

0.729166667

0.814483693

0.68583878

0.020879577

0.006814895

0.958515455

0.8

0.739801882

0.620409982

0.020998995

0.007895374

0.982178346

0.758064516

0.73183427

0.58650519

0.01840594

0.005266276

0.827557372

0.678571429

0.75861334

0.657806826

0.05960707

0.030835966

0.864271752

0.718954248

0.728798027

0.621372549

0.049980381

0.029246741

0.915465117

0.836336336

0.632675843

0.430287115

0.047567

0.018876

0.945919765

0.814285714

0.807526368

0.664418938

0.0267441

0.006586

0.962351373

0.851351351

0.733075024

0.624977919

0.0252326

0.011284

0.981805885

0.860655738

0.727046308

0.621084798

0.0228896

0.008088

0.83392547

0.752427184

0.749178241

0.669057867

0.0636916

0.03711

0.867737825

0.743902439

0.724178282

0.59988578

0.0519912

0.03114

0.917726394

0.851851852

0.6125184

0.3844201

0.0584022

0.022342

0.940874749

0.869369369

0.7945501

0.6844033

0.035574

0.012485

0.964213332

0.89

0.7227319

0.6172549

0.0319608

0.015831

0.981313393

0.895061728

0.7206711

0.6165988

0.0281256

0.010769

0.83617572

0.776995305

0.7377832

0.6298727

0.0683642

0.042108

0.869423377

0.786195286

0.7208185

0.5804095

0.0534239

0.037574

0.922607817

0.879204893

0.580591

0.438253

0.0750966

0.028403

0.938572886

0.890572391

0.7760676

0.65931

0.0480889

0.016715

0.966216948

0.910967344

0.7085378

0.599849

0.0403343

0.02023

0.975049182

0.917307692

0.7106661

0.640318

0.03465

0.01445

0.840957946

0.802281369

0.7217243

0.633724

0.0756031

0.051994

0.870191024

0.803108808

0.7173696

0.631668

0.0561643

0.040177