4k upscale

Ultra-high-resolution 4K upscaling based on the exact given reference image of Cristiano Ronaldo. Absolute fidelity to the original facial anatomy, proportions, and identity. Maintain expression, gaze, pose, camera angle, framing, and perspective without distortion.
Clothing, hair, skin, and background elements must remain unchanged in structure, placement, and design. Restore fine details with natural realism. Enhance pores, fine lines, hair strands, eyelashes, fabric weaves, seams, and material edges without adding stylization.
Maintain the original color science, white balance, and tonal relationships exactly as captured. Lighting direction, intensity, contrast, and shadow behavior must match the source image exactly, only with increased clarity and expanded dynamic range.
No relighting, no reshaping. Remove noise. Apply controlled sharpening and reconstruct high-frequency details. Eliminate compression artifacts and noise while maintaining authentic textures. No smoothing, no plastic skin, no artificial shine.
Facial features must remain consistent throughout the image with coherent anatomy and clean, stable edges.
Negative constraints:
• No distortion
• No facial shifts
• No addition or subtraction of anatomy