Which of the following indicates non-uniformity in a digital image?

The presence of stripes on the image signifies non-uniformity because it suggests variations in the image's density or contrast that are not meant to be there. These stripes can arise from several issues, including problems with the imaging system, such as detector malfunction or variations in exposure across the imaging surface. A uniform digital image should possess consistent appearance throughout, lacking any noticeable patterns or artifacts like stripes. Sharp edges, consistent brightness, and crisp details, on the other hand, are characteristics of a well-formed and uniformly captured image, reflecting clarity and proper exposure rather than indicating any form of inconsistency or non-uniformity.