Add PictureBox used to show the result of the image
Add ListBox that can choose the result that we want to display
Finish the function to extract the channel of color
The Bitmap has three channel used to represented the image.
The three channels are formed by rad, green and blue.
Add button that executes the RGB Extraction
Mer show_result and RGB_extraction
Let PictureBox show the result of image
Merge branch 'RGB_extraction'