[iacircle] [Up] [iacos] Image Creation

iaramp
Create an image with vertical bands of increasing gray values.

Synopsis

g = iaramp( s, n, range )

Implemented in Python.

Input

s	Image. Gray-scale (uint8 or uint16) or binary image (logical). [H W], height and width output image dimensions.
n	Double. Non-negative integer. number of vertical bands.
range	Image. Gray-scale (uint8 or uint16) or binary image (logical). [kmin, kmax], minimum and maximum gray scale values.

Output

g	Image. Gray-scale (uint8 or uint16) or binary image (logical).

Description

Creates a gray scale image with dimensions given by s, with n increasing gray scale bands from left to right with values varying from the specified range.

Examples

>>> F = iaramp([5,7], 3, [4,10])

>>> print F

[[ 4  4  4  7  7 10 10]
 [ 4  4  4  7  7 10 10]
 [ 4  4  4  7  7 10 10]
 [ 4  4  4  7  7 10 10]
 [ 4  4  4  7  7 10 10]]

>>> F = iaramp([200,300], 10, [0,255])

>>> iashow(F)

(200, 300) Min= 0 Max= 255 Mean=127.200 Std=81.37


F

Equation

Source Code
        def iaramp(s, n, range):
    from Numeric import arange
    rows, cols = s[0], s[1]
    x, y = iameshgrid(arange(cols), arange(rows))
    g = x*n/cols * (range[1]-range[0]) / (n-1) + range[0]
    return g
    
      

iaramp Create an image with vertical bands of increasing gray values.