Update pages/7_Unstructured_data.py

pages/7_Unstructured_data.py

@@ -476,6 +476,22 @@ if file_type == "IMAGE":
         cv2.waitKey()
         cv2.destroyAllWindows()
         ''')
+
+        st.subheader('**Rotation**')
+        st.markdown('''
+        - Rotation is a affine transformation matrix which rotates the image at one angle 
+        - Formula:
+            $$
+            I(x,y) \cdot Rotation matrix = I'(x',y') \\
+            x' = x \cdot \cos(θ) - y \cdot \sin(θ) \\
+            y' = x \cdot \sin(θ) + y \cdot \cos(θ)
+            $$
+        - 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
+        - cos(θ) is anti-clockwise
+        - Angle is between choosen pixel values
+        ''')