Consider the $8 \times 8$ image. The seed pixel is shown in boldface. Use the 4 connectivity to segment the image so that the region is to be made of pixels with gray levels less than or equal to 56 .
$$
\left[\begin{array}{llllllll}
65 & 62 & 65 & 61 & 59 & 57 & 56 & 54 \\
58 & 62 & 64 & 62 & 58 & 58 & 54 & 52 \\
71 & 71 & 64 & 63 & 58 & 55 & 54 & 54 \\
71 & 71 & 70 & 70 & 62 & 57 & 54 & 55 \\
71 & 70 & 68 & 69 & 66 & 62 & 59 & 58 \\
69 & 66 & 67 & 67 & 62 & 61 & 60 & 58 \\
65 & 62 & 63 & 65 & 64 & 61 & 60 & 55 \\
66 & 61 & 61 & 61 & 62 & 62 & 60 & 57
\end{array}\right]
$$