During the drying process, dredged sludge undergoes the process of shrinkage that typically begins at the surface, followed by the formation of three dimensional networks of planar cracks that break the sludge into fragments (clods) of various sizes. This paper presents the description of the crack networks by the processes of image analysis for describing the sludge response to change in moisture content with the morphological features of the cracks and clods during the drying process. From analysis, all crack features increased with a decrease in sludge moisture content; the clod features, except the number of clods, decreased with a decrease in sludge moisture ; while the crack elongation remain fairly constant with a decreasing sludge moisture content. At 8% d. b, the equilibrium moisture content, the crack area was 0.96 times as large as the clod area ; and the crack-clod ratio had a good logarithmic relationship with the sludge moisture content. The crack pattern was found to depend on the sludge drying rate and the moisture level within the sludge body.