Step 1: Read original image (readImage operator in figure 5);
Step 2: Display image (display operator in figure 5 and result in figure 1);
Step 3: Convert to gray scale original image (ConvertToGray operator in figure 5);
Step 4: Display gray image (display #1 operator in figure 5 and result in figure 2);
Step 5: Threshold gray image using 189 as tresh (tresh operator in figure 5);