What is edge enhancement?

• A. Sharpens areas of differing brightness
• B. Softens edges
• C. Adjusts gamma
• D. Increases blur

Answer: (A)

Edge enhancement sharpens areas where brightness changes, making edges between light and dark more pronounced. It boosts the contrast at boundaries so neighboring pixels with different brightness stand out more, which gives the image a crisper, more defined look. This is typically done with high-pass filtering or unsharp masking, where small details are amplified and then reintroduced into the image. It doesn’t soften edges, alter gamma, or increase blur, so those options wouldn’t achieve the same effect of making edges stand out.