真实照片与像素色彩索引对比海报

Use a single real photo as the sole source of content to create a vertical top-and-bottom comparison editorial poster. The upper half completely preserves the real photographic texture, subject identity, quantity, pose, spatial relationship, lighting, and composition of the input photo, without turning the photo into an illustration; the lower half is a stylized re-rendering area of the same photo: on warm white paper, the image is refined into four equal-sized square pixel color block indices, respectively corresponding to the most recognizable subject outline, architectural or object structure, relationship between main colors and light/shadow, and one environmental detail from the photo. Each grid uses hard-edged pixel blocks with a limited number of colors and a low-resolution grid feel, preserving traceable forms instead of random mosaics. The four grids are arranged in a 2×2 layout with ample paper space left around them; use thin black crosshair crop/registration marks to frame the index area, adding a very small amount of small bilingual titles and fields, such as "COLOR INDEX / SCENE STUDY," with restrained and clear text like print proof annotations that do not overshadow the main content. The lower half must look like a designed color index card, rather than a filter, ordinary pixelation, or repeated photo; do not add irrelevant objects or change the theme of the photo. The upper and lower areas each occupy about half, with a clear horizontal boundary; side-by-side layout is prohibited, multi-image collages are prohibited, "original/AI image" corner marks are prohibited, and watermarks and brand logos are prohibited. All colors are extracted and compressed from the input photo, and the content of the four grids changes according to the subject of the photo, applicable to any photo such as people, animals, architecture, street scenes, nature, interiors, food, and objects.