Added an image processing plugin example

Author: PierreRaybaut

plugins/examples/cdl_example_imageproc.py

@@ -0,0 +1,53 @@
+# -*- coding: utf-8 -*-
+
+"""
+Extract blobs (plugin example)
+==============================
+
+This is a simple example of a DataLab image processing plugin.
+
+It adds a new menu entry in "Plugins" menu, with a sub-menu "Extract blobs (example)".
+This sub-menu contains two actions, "Preprocess image" and "Detect blobs".
+
+.. note::
+
+    This plugin is not installed by default. To install it, copy this file to
+    your DataLab plugins directory (see `DataLab documentation
+    <https://cdlapp.readthedocs.io/en/latest/features/general/plugins.html>`_).
+"""
+
+import cdl.param
+import cdl.plugins
+
+
+class ExtractBlobs(cdl.plugins.PluginBase):
+    """DataLab Example Plugin"""
+
+    PLUGIN_INFO = cdl.plugins.PluginInfo(
+        name="Extract blobs (example)",
+        version="1.0.0",
+        description="This is an example plugin",
+    )
+
+    def preprocess(self) -> None:
+        """Preprocess image"""
+        panel = self.imagepanel
+        param = cdl.param.BinningParam.create(binning_x=2, binning_y=2)
+        panel.processor.compute_binning(param)
+        panel.processor.compute_moving_median(cdl.param.MovingMedianParam.create(n=5))
+
+    def detect_blobs(self) -> None:
+        """Detect circular blobs"""
+        panel = self.imagepanel
+        param = cdl.param.BlobOpenCVParam()
+        param.filter_by_circularity = True
+        param.min_circularity = 0.8
+        param.max_circularity = 1.0
+        panel.processor.compute_blob_opencv(param)
+
+    def create_actions(self) -> None:
+        """Create actions"""
+        acth = self.imagepanel.acthandler
+        with acth.new_menu(self.PLUGIN_INFO.name):
+            acth.new_action("Preprocess image", triggered=self.preprocess)
+            acth.new_action("Detect circular blobs", triggered=self.detect_blobs)