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# -*- coding: utf-8 -*-
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# Copyright © 2009-2010 CEA
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# Licensed under the terms of the CECILL License
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# (see guiqwt/__init__.py for details)
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"""Image filter demo"""
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SHOW = True # Show test in GUI-based test launcher
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from scipy.ndimage import gaussian_filter
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from guiqwt.plot import ImageDialog
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from guiqwt.builder import make
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def imshow(x, y, data, filter_area, yreverse=True):
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win = ImageDialog(edit=False, toolbar=True, wintitle="Image filter demo",
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options=dict(xlabel="x (cm)", ylabel="y (cm)",
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image = make.xyimage(x, y, data)
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xmin, xmax, ymin, ymax = filter_area
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flt = make.imagefilter(xmin, xmax, ymin, ymax, image,
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filter=lambda x, y, data: gaussian_filter(data, 5))
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plot.add_item(flt, z=1)
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# -- Create QApplication
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guidata.qapplication()
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from guiqwt.tests.imagexy import compute_image
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x, y, data = compute_image()
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imshow(x, y, data, filter_area=(-3., -1., 0., 2.), yreverse=False)
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import os.path as osp, numpy as np
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from guiqwt.io import imagefile_to_array
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filename = osp.join(osp.dirname(__file__), "brain.png")
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data = imagefile_to_array(filename)
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x = np.linspace(0, 30., data.shape[1])
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y = np.linspace(0, 30., data.shape[0])
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imshow(x, y, data, filter_area=(10, 20, 5, 15))
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if __name__ == "__main__":
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guiqwt/tests/imagefilter.py
