照片转黑白铅笔线稿肖像

将上传的照片转换为细节丰富的黑白铅笔线描肖像。保留主体易于辨认的面部结构、发型、表情、姿势、服装轮廓和比例。使用干净的轮廓线、细腻的铅笔笔触、轻柔的交叉排线和克制的明暗塑造。背景保持简洁，呈现为在洁白纸张上由专业人士手绘完成的插画。

Convert the uploaded photograph into a detailed black-and-white pencil line-art portrait. Preserve the subject's recognizable facial structure, hairstyle, expression, pose, clothing outlines, and proportions. Use clean contour lines, delicate pencil strokes, subtle cross-hatching, and controlled shading. Keep the background minimal and create the appearance of a professionally hand-drawn illustration on clean white paper.