machinevisiontoolbox.Image.showpixels

Image.showpixels(textcolors=['yellow', 'blue'], fmt=None, ax=None, windowsize=0, **kwargs)

Display image with pixel values

Parameters:

• textcolors (list, optional) – text color, defaults to [‘yellow’, ‘blue’]

• fmt (str, optional) – format string for displaying pixel values, defaults to None

• ax (axes, optional) – Matplotlb axes to draw into, defaults to None

• windowsize (int, optional) – half side length of superimposed moving window, defaults to 0

Returns:

a moving window

Return type:

Window instance

Display a monochrome image with the pixel values overlaid. This is suitable for small images, of order 10x10, used for pedagogical purposes. For example it can be used to animate the operation of sliding window operations like convolution or morphology.

The first color in textcolors is used for pixels below 50% intensity and the second color for those above 50%.

If windowsize is given then a translucent colored window is superimposed and a Window instance returned. This allows the window position, color and opacity to be changed.

Example:

>>> from machinevisiontoolbox import Image
>>> img = Image.Random(10)
>>> window = img.showpixels(windowsize=1) # with 3x3 window
>>> window.move(2,3) # position window at (2,3)
>>> window.move(4,5, color='blue', alpha=0.7)

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Seealso:

print