Edge Aware ASCII Art Conversion

Apply an ASCII-art rendering effect to the reference image, where the ASCII character density and placement is driven by the underlying tonal contrast and edges of the photo, like a true edge-aware ASCII-art conversion. Dense character clusters follow the natural contours, silhouette lines, and high-detail areas (such as hair strands, fabric folds, and background structure), while flatter, low-contrast areas (such as smooth skin) stay comparatively clean with minimal or no texture. The effect should look like the ASCII characters are tracing the actual shapes and edges present in the photo, not a uniform overlay pasted on top of everything equally. Use a classic {argument name="color scheme" default="green-on-black or grayscale"} terminal character set ({argument name="character set" default="@ # % & * + . :"}), {argument name="density" default="medium"} overall density, with the original photo still legible underneath.