From d65bc9848a0a8d7ba7f477e188e00ee4ac1abe83 Mon Sep 17 00:00:00 2001
From: Tom Selier <tbj.selier@gmail.com>
Date: Fri, 22 Sep 2023 15:23:22 +0200
Subject: [PATCH] Added histograms

---
 src/suite.py | 44 +++++++++++++++++++++++++++++++++++++++++++-
 1 file changed, 43 insertions(+), 1 deletion(-)

diff --git a/src/suite.py b/src/suite.py
index ab2297d..08a5721 100644
--- a/src/suite.py
+++ b/src/suite.py
@@ -7,6 +7,7 @@ from PIL import ImageTk, Image
 import numpy as np
 import cv2
 import time
+import matplotlib.pyplot as plt
 
 PROJECT_PATH = pathlib.Path(__file__).parent
 PROJECT_UI = "./src/gui/main.ui"
@@ -16,6 +17,7 @@ class MainApp:
         self.builder = builder = pygubu.Builder()
         builder.add_resource_path(PROJECT_PATH)
         builder.add_from_file(PROJECT_UI)
+        
         # Main widget
         self.mainwindow = builder.get_object("main", master)
 
@@ -28,7 +30,11 @@ class MainApp:
         self.img_path = None
         self.img_current = 0
         self.img_max = 0
-        
+
+        # Plots
+        self.axs = self.createPlot(2, 2)
+
+        # UI
         self.blur_rate = None
         self.img_size = None
         self.sobel_select = None
@@ -69,6 +75,24 @@ class MainApp:
         else:
             print("Nothing to export!")
 
+    def createPlot(self, columns, rows):
+        fig, axs = plt.subplots(columns, rows)
+        return axs
+
+    def drawHist(self, image, labels, column, row):
+        self.axs[column, row].clear()
+        for i,lab in enumerate(labels):
+            hist = cv2.calcHist(
+                [image],
+                [i],
+                None,
+                [256],
+                [0, 256],
+            )
+            self.axs[column, row].plot(hist, label=lab)
+            self.axs[column, row].grid()
+            self.axs[column, row].legend()
+
     def update(self, event=None):
         path = self.img_path.get()
         print(path)
@@ -141,6 +165,24 @@ class MainApp:
             # Canny edge
             img_canny = cv2.Canny(image=img_blur,threshold1=ct1,threshold2=ct2)
             output.append(img_canny)
+
+            # BGR
+            output.append(img[:, :, 0]) # B
+            output.append(img[:, :, 1]) # G
+            output.append(img[:, :, 2]) # R
+            if img is not None:
+                self.drawHist(img, ('B', 'G', 'R'), 0, 0)
+            
+            # HSV
+            img_hsv = cv2.cvtColor(img, cv2.COLOR_BGR2HSV)
+            output.append(img_hsv)
+            output.append(img_hsv[:, :, 0]) # H
+            output.append(img_hsv[:, :, 1]) # S
+            output.append(img_hsv[:, :, 2]) # V
+            if img_hsv is not None:
+                self.drawHist(img_hsv, ('H', 'S', 'V'), 0, 1)
+
+            plt.show(block=False)
             
             # Draw all output images
             for idx, data in enumerate(output):