risograph

# Photo Riso Poster Turn the user's input into ONE quiet riso-print poster image, generated by the built-in image generation tool from a **text-only** prompt. Never attach the source photo or any reference image to the generation call: evidence travels through your written analysis, style through the rules below. Work autonomously through all steps without asking questions. Stop only if the image generation tool is unavailable — say so and never draw the poster with code. ## Input - **Photo**: lock its file path, read it visually. If EXIF capture date is readable (e.g. via exiftool or PIL), use it for the date line; otherwise omit the date rather than inventing one. - **Text theme** (no photo): distill the theme into one imageable core idea, then invent modest archive facts (a count, a season, a weather feel) consistent with it. - Aspect: a photo's orientation and ratio decide the poster's — landscape → landscape, portrait → portrait, square → square, nearest ratio the tool supports. A text theme defaults to portrait 3:4 unless the user asks otherwise. ## Abstraction level Default is **standard**. Switch only when the user asks in plain words (抽象一点 / more abstract → minimal; 具象一点、像一点 / more faithful → faithful): - **faithful** — printed-illustration detail: fuller contours and interior texture, like a botanical or object plate from an old book. - **standard** — simplified silhouettes: identity readable, detail dropped. - **minimal** — identity dissolves: subjects become pure geometric marks (dots, short bars, blocks, arcs, hairlines); only counts, positions, size hierarchy, directions, intervals, and occlusion survive. No recognizable silhouettes at all. ## Deconstruct Record observable facts once, briefly: - Primary element and up to two secondary relationships: identity, shape, count, normalized position, scale, direction. - Structure: one dominant axis; rhythm (intervals, clusters, repetition); depth order; occlusion; meaningful empty field. - Color: the photo's LARGE-AREA temperature (cool: blue/gray sky, snow, water, green field → cool paper; warm: dusk, autumn, earth, indoor light → warm paper), plus 2–3 dominant color roles to become ink colors. - Archive facts for typography: season, time-of-day or weather feel, a count worth stating. ## Map facts to marks and type - Every visual mark traces to a named fact; delete decorative marks. One primary motif family, at most two supporting. - Marks are printed-matter forms at the chosen abstraction level — faithful: detailed plate illustration; standard: simplified silhouettes, blocks, hairlines, dots, short bars; minimal: geometric marks only. At every level preserve relational invariants — counts, uneven spacing, size hierarchy, direction, asymmetry, occlusion, reflections and shadows as fainter echoes. Never trace the scene's full layout: the composition is a sparse cluster floating on paper, not a filled scene — no sky region, no ground plane running edge to edge; supporting elements sampled sparsely (3–5 representatives), never a full row. - Human figures become small anonymous silhouettes; animals featureless silhouettes; never faces. - Type is also an evidence outlet: a count mark like `x 002` (append a noun like `x 024 TRUNKS` when it clarifies; use `x 050+` when beyond exact counting), a date line, a weather/time note, a 2–4 word poetic English phrase, an archive number. A place name only when recognized with high confidence; otherwise omit. ## Generate Write one compact image prompt — four short paragraphs: canvas+paper / ink layers+cluster / typography / mood+avoids — then call the image generation tool. The prompt must state: - **Canvas**: the chosen aspect ratio; full-frame scanned flat matte paper with subtle fibers and faint mottling. **Paper color follows the photo's temperature** — state it explicitly: cool photo → `pale blue-gray porcelain paper` or `cool snow-white paper`; warm photo → `warm pale cream paper`. Light, never deep yellow, never stained. No border, mockup, or 3D. - **Riso multi-ink system**: the poster is a 2–3 color risograph print. Assign each sampled color role to one ink layer — e.g. `deep indigo ink`, `leaf-green ink`, `vermilion-orange ink` — printed as grainy silhouettes and fields with slight misregistration where layers overlap. Inks stay saturated and visibly colored; the most vivid ink covers the primary element or a substantial field, not a tiny dot. Gray/black hairlines may support. - **Attention geometry**: 65–85% empty paper; one visual cluster occupying 10–25%, off-center where the source structure suggests; no edge-hugging, no grid alignment, keep the source's uneven spacing. - **Cluster treatment**: shapes drawn as printed matter — photocopy softness, fine risograph grain, ink bleed at edges, slight layer misregistration. - **Typography system**: small typewriter/serif type around the cluster — the poetic phrase in 2–4 stacked lines pressed near the cluster; a tiny archive block set apart like a margin note, using the fixed vocabulary `ARCHIVE NNN` or `NO. NNN` plus the date and weather/time lines; the count mark; one or two tiny scattered dashes or dots. Type may print in one of the ink colors. Slight drift and misregistration welcome; every word short, simple, correctly spelled. - **Mood**: quiet, archival, diary-like, indie riso zine, nostalgic but chromatic. - **Avoid**: full-bleed scene or landscape painting, sky/ground regions filling the canvas, cartoon or children's-book flatness, commercial poster layout, clean UI white, cinematic light, 3D, neon, photorealism, long clean paragraphs, muddy browns. ## Deliver Return the generated image, then: ```text **最终 Prompt** [the exact prompt sent to the tool] **说明** - 证据: [2–3 key source facts and where they landed — marks or type] - 纸色: [cool/warm and why] - 画幅: [ratio and why] ``` Before returning, check once: cluster small and off-center on mostly empty paper; every mark and every typographic fact traceable to the source; 2–3 inks visibly colored; paper temperature matches the photo; words spelled correctly. If ink color is washed out, text is garbled, or the layout collapsed into a filled scene, regenerate once with the failing rule stated more forcefully. ## Examples - "用 $risograph 把这张照片做成海报" (attach photo) - "用 $risograph 做一张关于夏天傍晚的图" (text theme)