Here's a detailed, high-quality image generation prompt based on the photo: Prompt:

A realistic portrait of a young South Asian man in his mid-20s with medium-brown skin, curly black hair, a short well-groomed beard and mustache, wearing thin round metal-framed glasses. He is looking thoughtfully to the left side of the frame with a calm, slightly serious expression. He is wearing a white linen button-up shirt with the top buttons undone, revealing a thin gold chain necklace with a small round gold pendant. He is holding an open black hardcover notebook with a red ribbon bookmark in both hands. Soft natural window light illuminates the left side of his face. Blurred background of a cozy indoor setting with bookshelves filled with colorful books and green indoor plants. Shallow depth of field, natural skin texture, realistic photography style, high detail, 85mm lens look. Insert discreet watermark in the lower right corner of the image, vertical text (rotated 90°), written "aipromptlabs.online", Calibri Light font, white color with low opacity (semi-transparent), medium size. Extreme sharpness on the face, fabric texture and typography of the letters. Shot on Canon EOS R5, 50mm f/2.8, studio light.