Pôster de Índice de Cores em Pixel (Foto para Pôster de Blocos de Cores Pixelados)

Use one real photo as the only content source to create a vertical before-and-after comparison poster. The top 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 bottom half is a stylized reinterpretation area 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, main color and light-shadow relationship, and one environmental detail in the photo. Each cell uses a limited color palette with hard-edged pixel blocks and a low-resolution grid feel, retaining traceable forms without random mosaics. The four cells are arranged in a 2x2 grid, with ample paper margin around them. Use thin black cross crop/registration marks to frame the index area, and add a very small amount of small bilingual titles and fields, such as "COLOR INDEX / SCENE STUDY", with restrained, clear text that looks like print proof annotations, not overpowering. The bottom area must look like a designed color index card, not a filter, ordinary pixelation, or repeated photo. Do not add unrelated objects or change the photo's subject. The top and bottom areas each take about half, with a clear horizontal boundary. No side-by-side layout, no multi-image collage, no "original/AI image" corner labels, no watermarks, and no brand logos. All colors are extracted and compressed from the input photo, and the content of the four cells varies with the photo subject, applicable to any photo such as people, animals, architecture, street scenes, nature, interiors, food, and objects.