[iabwlp] [Up] [iaramp] Image Creation

iacircle
Create a binary circle image.

Synopsis

g = iacircle( s, r, c )

Implemented in Python.

Input

s	Image. Gray-scale (uint8 or uint16) or binary image (logical). [rows cols], output image dimensions.
r	Double. Non-negative integer. radius.
c	Image. Gray-scale (uint8 or uint16) or binary image (logical). [row0 col0], center of the circle.

Output

g	Image. Binary image (logical).

Description

Creates a binary image with dimensions given by s, radius given by r and center given by c. The pixels inside the circle are one and outside zero.

Examples

>>> F = iacircle([5,7], 2, [2,3])

>>> print F

[[0 0 0 1 0 0 0]
 [0 0 1 1 1 0 0]
 [0 1 1 1 1 1 0]
 [0 0 1 1 1 0 0]
 [0 0 0 1 0 0 0]]

>>> F = iacircle([200,300], 90, [100,150])

>>> iashow(F)

(200, 300) Min= 0 Max= 1 Mean=0.424 Std=0.49


F

Equation

Source Code
        def iacircle(s, r, c):
    rows, cols = s[0], s[1]
    y0, x0 = c[0], c[1]
    x, y = iameshgrid(range(cols), range(rows))
    g = (x - x0)**2 + (y - y0)**2 <= r**2
    return g
    
      

iacircle Create a binary circle image.