픽셀 컬러 인덱스 포스터 (사진을 픽셀화된 컬러 블록 포스터로)

Create a vertical before-and-after editorial poster using a single real photograph as the only content source. The upper half fully preserves the input photo's authentic photographic texture, subject identity, quantity, pose, spatial relationships, lighting, and composition, without turning the photo into an illustration. The lower half is a stylized reinterpretation zone of the same photo: on a warm white paper surface, distill the image into four equal square pixel color block indexes, corresponding respectively to the most recognizable subject silhouette, architectural or object structure, primary color and light-shadow relationship, and one environmental detail. Each cell uses a limited color palette with hard-edged pixel blocks and a low-resolution grid feel, retaining traceable forms without random mosaicking. Arrange the four cells in a 2x2 grid with ample paper margin around them; use thin black crosshair crop/registration marks to frame the index area, and add a minimal amount of small bilingual titles and fields, such as "COLOR INDEX / SCENE STUDY", with restrained, clear text that reads like print proof annotations without overwhelming the design. The lower half must look like a designed color index card, not a filter, ordinary pixelation, or repeated photo; do not add unrelated objects or alter the photo's subject. The upper and lower areas each occupy roughly half, with a clear horizontal boundary; side-by-side layout, multi-image collage, "original/AI image" corner labels, watermarks, and brand logos are all prohibited. All colors are extracted and compressed from the input photo, and the content of the four cells varies with the photo's subject, applicable to any photo including people, animals, architecture, street scenes, nature, interiors, food, and objects.