{ "metadata": { "image_type": "摄影作品", "primary_purpose": "社论/肖像摄影" }, "composition": { "rule_applied": "三分法构图与单点透视", "aspect_ratio": "2:3", "layout": "非对称单人主体，具有深度的环境背景", "focal_points": [ "主体被明亮光线照亮的 [subject]" ] } }