Update pages/7_Unstructured_data.py

pages/7_Unstructured_data.py

@@ -440,13 +440,24 @@ if file_type == "IMAGE":
             - I'(x',y') ---> augumented image 
             $$
         ''', unsafe_allow_html=True)
+        
+        st.subheader("Affine Transformation Workflow")
+        st.markdown("""
+        The general steps for performing affine transformation in OpenCV:
+        1. Load the Image
+        2. Define Source and Destination Points
+        3. Calculate the Transformation Matrix
+        4. Apply `cv2.warpAffine()`
+        5. Display or Save the Transformed Image
+        """, unsafe_allow_html=True)
+        
         st.subheader('**Translation**')
         st.markdown('''
         - Translation is a type of affine transformation matrix used to shift the image
         - It shifts the image both in x-axis direction and y-axis direction
+        - I(x,y) \cdot Translation matrix = I'(x',y') 
         - Formula:
             $$
-            I(x,y) \cdot Translation matrix = I'(x',y') \\
             x' = x + t_x \\
             y' = y + t_y
             $$
@@ -480,9 +491,9 @@ if file_type == "IMAGE":
         st.subheader('**Rotation**')
         st.markdown('''
         - Rotation is a affine transformation matrix which rotates the image at one angle 
+        - I(x,y) \cdot Rotation matrix = I'(x',y') 
         - Formula:
             $$
-            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)
             $$
@@ -492,6 +503,17 @@ if file_type == "IMAGE":
         - cos(θ) is anti-clockwise
         - Angle is between choosen pixel values
         ''')
+        st.code('''
+        import cv2
+        ## creation of rotation matrix
+        r_m = cv2.getRotationMatrix2D((800,1280),0,1)
+        r_img = cv2.warpAffine(img,r_m,(2560,1600))
+        ## save and display the image 
+        cv2.imshow("org_img",img)
+        cv2.imshow("rotated_img",r_img)
+        cv2.waitKey()
+        cv2.destroyAllWindows()
+        ''')