Ahmed Mohammed Ali Saleh creator Ashraf Nasr Sayed Supervisor Zeinab Abd El ghany Wishahy Supervisor ua Cairo Ahmed Mohammed Ali Saleh 2006 eng Eng 120P : charts ; 30cm The errors in area calculation from digital image take place essentially within the boundary pixels at the edges of the shape It is the result of the difference between the pixel fraction , actually covered by the object , and its total area considered in the computer calculations Ahmed Mohammed Ali Saleh ; Supervised Zeinab Abd El ghany Wishahy , Ashraf Nasr Sayed Thesis (M.Sc.) - Cairo University - Faculty Of Engineering - Department Of Civil Engineering Issued also as CD Areas Matching Pixel http://172.23.153.220/th.pdf http://172.23.153.220/th.pdf EG-GICUC 070225 20250223031721.0 eng