Update INSTALL.md

INSTALL.md

@@ -7,16 +7,24 @@
 2. LibRaw
    1. MacOS : `brew install libraw libpng libjpeg`
    2. Ubuntu : 
+   
       step 1: download libraw package here: https://www.libraw.org/download
+      
       step 2: extract the pkg using `tar xzvf LibRaw-X.YY.tar.gz`
-      step 3: cd LibRaw-X.YY
+      
+      step 3: ```cd LibRaw-X.YY
                ./configure # with optional args
                make
-      step 4: sudo make install
+               ```
+               
+      step 4: `sudo make install`
+      
       step 5: change the target_link_libraries in cmakelist file to the following:
-      target_link_libraries(${PROJECT_NAME} 
+      
+      ```target_link_libraries(${PROJECT_NAME} 
               ${OpenCV_LIBS}
               ${LIBRAW_LIBRARY})
+              ```
 
 3. Run CMake to build
    ```shell