add showing peaks with scatterplot

setup.py

@@ -10,6 +10,7 @@ setup(name='situr',
       packages=find_namespace_packages(include=['situr.*']),
       install_requires=[
           'numpy>=1.21.0',
+          'matplotlib>=3.4.0',
           'open3d>=0.13.0',
           'Pillow>=8.3.1',
           'scikit-image>=0.18.2',

situr/registration/peak_finder.py

@@ -3,6 +3,7 @@ from PIL import Image, ImageDraw
 from skimage import img_as_float
 from skimage.feature import blob_dog
 import numpy as np
+from matplotlib import pyplot as plt
 
 from situr.image.situ_image import SituImage
 
@@ -30,6 +31,18 @@ class PeakFinder:
         """
         return self.find_peaks(img.get_data()[channel, focus_level, :, :])
 
+    def scatterplot_channel_peaks(self,
+                                  img: SituImage,
+                                  channel: int,
+                                  focus_level: int = 0,
+                                  color='b'):
+        peaks = self.get_channel_peaks(img, channel, focus_level)
+
+        # TODO: test with non square image if right coordinates
+        plt.xlim(0, img.get_focus_level(0, 0).shape[1])
+        plt.ylim(0, img.get_focus_level(0, 0).shape[0])
+        plt.scatter(peaks[:, 0], peaks[:, 1], color=color)
+
     def show_channel_peaks(self,
                            img: SituImage,
                            channel: int,