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 76 .
$$
\left[\begin{array}{rrrrrrrr}
172 & 157 & 115 & 62 & 4 & 4 & 4 & 46 \\
163 & 165 & 118 & 83 & 13 & 6 & 9 & 46 \\
138 & 185 & 128 & 71 & 90 & 24 & 19 & 30 \\
121 & 184 & 126 & 83 & 78 & 51 & 50 & 51 \\
156 & 185 & 136 & 74 & 40 & 42 & 44 & 53 \\
160 & 175 & 121 & 63 & 77 & 81 & 65 & 71 \\
178 & 170 & 128 & 88 & 73 & 61 & 59 & 59 \\
176 & 163 & 133 & 97 & 88 & 35 & 26 & 27
\end{array}\right]
$$