钢笔画风格转换

json 将上传的图片变成钢笔画风格。 🍌 Nano bannana Pro prompt： { "prompt_template": "A detailed ink drawing based on [insert image reference here], isolating the main subject. Rendered in a traditional micron pen sketchbook style. Shading, texture, and patterns are achieved exclusively through dense cross-hatching and fine line work, using high contrast black ink on textured white paper. The subject is centered with vast negative space, completely removing the original photo\'s background." }