New upstream version 0.9.0+dfsg

1 files changed, 149 insertions, 0 deletions

diff --git a/examples/compareImages.py b/examples/compareImages.py
new file mode 100644
index 0000000..94f68a0
--- /dev/null
+++ b/examples/compareImages.py
@@ -0,0 +1,149 @@
+#!/usr/bin/env python
+# coding: utf-8
+# /*##########################################################################
+#
+# Copyright (c) 2016-2017 European Synchrotron Radiation Facility
+#
+# Permission is hereby granted, free of charge, to any person obtaining a copy
+# of this software and associated documentation files (the "Software"), to deal
+# in the Software without restriction, including without limitation the rights
+# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+# copies of the Software, and to permit persons to whom the Software is
+# furnished to do so, subject to the following conditions:
+#
+# The above copyright notice and this permission notice shall be included in
+# all copies or substantial portions of the Software.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+# THE SOFTWARE.
+#
+# ###########################################################################*/
+"""Example demonstrating the use of the widget CompareImages
+"""
+
+import sys
+import logging
+import numpy
+import argparse
+
+import silx.io
+from silx.gui import qt
+import silx.test.utils
+from silx.gui.plot.CompareImages import CompareImages
+
+_logger = logging.getLogger(__name__)
+
+try:
+    import fabio
+except ImportError:
+    _logger.debug("Backtrace", exc_info=True)
+    fabio = None
+
+try:
+    import PIL
+except ImportError:
+    _logger.debug("Backtrace", exc_info=True)
+    PIL = None
+
+
+def createTestData():
+    data = numpy.arange(100 * 100)
+    data = (data % 100) / 5.0
+    data = numpy.sin(data)
+    data1 = data.copy()
+    data1.shape = 100, 100
+    data2 = silx.test.utils.add_gaussian_noise(data, stdev=0.1)
+    data2.shape = 100, 100
+    return data1, data2
+
+
+def loadImage(filename):
+    try:
+        return silx.io.get_data(filename)
+    except Exception:
+        _logger.debug("Error while loading image with silx.io", exc_info=True)
+
+    if fabio is None and PIL is None:
+        raise ImportError("fabio nor PIL are available")
+
+    if fabio is not None:
+        try:
+            return fabio.open(filename).data
+        except Exception:
+            _logger.debug("Error while loading image with fabio", exc_info=True)
+
+    if PIL is not None:
+        try:
+            return numpy.asarray(PIL.Image.open(filename))
+        except Exception:
+            _logger.debug("Error while loading image with PIL", exc_info=True)
+
+    raise Exception("Impossible to load '%s' with the available image libraries" % filename)
+
+
+file_description = """
+Image data to compare (HDF5 file with path, EDF files, JPEG/PNG image files).
+Data from HDF5 files can be accessed using dataset path and slicing as an URL: silx:../my_file.h5?path=/entry/data&slice=10
+EDF file frames also can can be accessed using URL: fabio:../my_file.edf?slice=10
+Using URL in command like usually have to be quoted: "URL".
+"""
+
+
+def createParser():
+    parser = argparse.ArgumentParser(description=__doc__)
+    parser.add_argument(
+        'files',
+        nargs=argparse.ZERO_OR_MORE,
+        help=file_description)
+    parser.add_argument(
+        '--debug',
+        dest="debug",
+        action="store_true",
+        default=False,
+        help='Set logging system in debug mode')
+    parser.add_argument(
+        '--testdata',
+        dest="testdata",
+        action="store_true",
+        default=False,
+        help='Use synthetic images to test the application')
+    parser.add_argument(
+        '--use-opengl-plot',
+        dest="use_opengl_plot",
+        action="store_true",
+        default=False,
+        help='Use OpenGL for plots (instead of matplotlib)')
+    return parser
+
+
+if __name__ == "__main__":
+    parser = createParser()
+    options = parser.parse_args(sys.argv[1:])
+
+    if options.debug:
+        logging.root.setLevel(logging.DEBUG)
+
+    if options.testdata:
+        _logger.info("Generate test data")
+        data1, data2 = createTestData()
+    else:
+        if len(options.files) != 2:
+            raise Exception("Expected 2 images to compare them")
+        data1 = loadImage(options.files[0])
+        data2 = loadImage(options.files[1])
+
+    if options.use_opengl_plot:
+        backend = "gl"
+    else:
+        backend = "mpl"
+
+    app = qt.QApplication([])
+    window = CompareImages(backend=backend)
+    window.setData(data1, data2)
+    window.setVisible(True)
+    app.exec_()