Update pages/7_Unstructured_data.py

pages/7_Unstructured_data.py

@@ -441,7 +441,7 @@ if file_type == "IMAGE":
             $$
         ''', unsafe_allow_html=True)
         
-        st.subheader("Affine Transformation Workflow")
+        st.header("Affine Transformation Workflow")
         st.markdown("""
         The general steps for performing affine transformation in OpenCV:
         1. Load the Image
@@ -503,6 +503,9 @@ if file_type == "IMAGE":
             x' = x \cdot \cos(θ) - y \cdot \sin(θ) \\
             y' = x \cdot \sin(θ) + y \cdot \cos(θ)
             $$
+        - **Rotation matrix:**
+        - [cos(θ) sin(θ) Tx=0
+           sin(θ) cos(θ) Ty=0 ]
         - θ is angle between image pixel and x-axis
         - always rotation is in anti-clockwise direction when angle is +ve
         - always rotation is in clockwise direction when angle is -ve
@@ -520,6 +523,16 @@ if file_type == "IMAGE":
         cv2.waitKey()
         cv2.destroyAllWindows()
         ''')
+
+        st.subheader('**Scaling**')
+        st.markdown('''
+        - Scaling is a affine transformation matrix used for zoom-in and zoom-out which is **(compression and expansion)**
+        - Formula:
+            $$
+            I(x,y) \cdot Scaling matrix = I'(x',y') 
+            $$
+        
+        ''')