Sketch

In image editing, the Sketch function is used to transform photos or images into sketch-like drawings. This effect makes the photo appear as if it were a hand-drawn sketch, and it's often used in artistic creations, design, and enhancing the visual appeal of images.

Here are the common parameters found in the Sketch function and their respective roles:

1. Threshold:

   • Role: The Threshold parameter controls the contrast of the sketch effect. A lower threshold retains more details, while a higher threshold results in a simpler, more contrasted image.
   • Adjustment Effects:
     • Lower threshold: Retains more gray levels and details.
     • Higher threshold: Produces a cleaner, more contrasted image with only the main contours visible.

2. Noise Reduction:

   • Role: The Noise Reduction parameter reduces noise or small specks in the image, making the sketch effect smoother and cleaner.
   • Adjustment Effects:
     • Lower noise reduction: Retains more details but may include more specks and noise.
     • Higher noise reduction: Results in a cleaner, smoother image but might lose some details.

3. Smoothness:

   • Role: The Smoothness parameter controls the smoothness of the sketch lines. It makes the lines more rounded and less sharp.
   • Adjustment Effects:
     • Lower smoothness: Produces sharper lines with clearer edges.
     • Higher smoothness: Creates rounder lines with more natural transitions.

By adjusting these parameters, users can create various styles of sketch effects, from highly detailed artistic pieces to simple and clean sketches.