Code and Results for Chapter 7

• Code for General Use Written for this Chapter
  • Second Order Image Features:
    • phi_to_xy_increment.m (returns the column and row steps given phi)
      
    • co_occurrence.m (computes the co-occurrence matrix for input d and phi)
      
    • ASM.m (compute the angular second moment of the image)
      
    • CON.m (computes the image contrast)
      
    • IDF.m (computes the inverse difference moment of the image)
      
    • entropy.m (compute the entropy of the image)
      
  • Run Length Image Features:
    • max_run_length_phi.m (determines the longest run length in a given direction)
      
    • Q_RL.m (computes the Q_RL matrix)
      
    • SRE.m (computes the short run emphasis)
      
    • LRE.m (computes the long run emphasis)
      
    • GLNU.m (computes the gray level non-uniformity)
      
    • RLN.m (computes the run length non-uniformity)
      
    • RP.m (computes the run percentage)
      
  • Geometric Moments:
    • Hu_moments.m (extracts the Hu moments of an image)
      
    • Zernike_moments.m (extracts the Zernike moments of an image)
      
    • Zernike_polynomial.m (evaluates a Zernike polynomial)
      
• Verifications/Duplication of Figures or Results from the Text
  • dup_co_occurrence_example.m (duplicates an example co-occurrence calculation))
    
  • dup_second_order_stats.m (displays calls needed to compute second order image statistics))
    
  • dup_run_length_example.m (duplicates the run length examples)
    
  • gen_local_linear_transformations.m (generates the local feature extraction matrices)
    
  • dup_Hu_moments.m (extracts Hu moments on versions of the petasti image)
    
  • dup_Zernike_moments.m (extracts Zernike moments on versions of the petasti image)
    
• Problem Solutions
  • prob_7_1.m (compute the co-occurrence matrix in different directions)
    
  • prob_7_2.m (compute the run length matrices)
    
  • prob_7_3.m (contrast in different directions)
    
  • prob_7_4.m (features of some images from the book)
    
  • chap_7_prob_15.nb (performs some needed algebra)
    
• Petasti Images
  • petasti_fig_7_5_a.gif (the original petasti image)
    
  • petasti_fig_7_5_b.gif (half the original petasti image)
    
  • petasti_fig_7_5_c.gif (petasti reflected in x axis)
    
  • petasti_fig_7_5_d.gif (petasti rotated 180)
    
  • petasti_fig_7_5_e.gif (petasti rotated 90)
    
  • petasti_fig_7_5_f.gif (petasti rotated)