مشاهده نسخه کامل : 2-7 مسئله کتاب گنزالس

26-05-15, 20:00
بسم الله الرحمن الرحیم
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سوال کتاب گنزالس
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و جواب اون مطابق زیر است:
The image in question is given by
(f (x,y ) = i (x,y )r (x,y
= 255e −[(x−x0)2+(y−y0)2] ×1.0
= 255e −[(x−x0)2+(y−y0)2]
A cross section of the image is shown in Fig. P2.7(a). If the intensity is quantized
using m bits, then we have the situation shown in Fig. P2.7(b), where
G = (255 +1)/2m. Since an abrupt change of 8 intensity levels is assumed to
be detectable by the eye, it follows that G = 8 = 256/2m, or m = 5. In other
words, 32, or fewer, intensity levels will produce visible false contouring.

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