Póster de Índice de Color de Píxeles (Foto a Póster de Bloques de Color Pixelados)

Use one real photograph as the sole content source to create a vertical before-and-after comparison poster. The upper half fully preserves the real photographic texture, subject identity, quantity, pose, spatial relationships, lighting, and composition of the input photo, without turning the photo into an illustration; the lower half is a stylized re-rendering zone of the same photo: on a warm white paper surface, distill the image into four equal-sized 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 in the photo. Each cell uses a limited color palette of hard-edged pixel blocks and a low-resolution grid feel, retaining traceable forms without random mosaics. Arrange the four cells in a 2x2 grid, leaving ample paper space 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 layouts, multi-image collages, "original/AI image" corner labels, watermarks, and brand logos are 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 such as people, animals, architecture, street scenes, nature, interiors, food, and objects.