Use the highest-resolution source image available
Shoot in RAW instead of JPEG
Increase camera resolution settings before shooting
Use proper lighting to reduce noise and blur
Stabilize the camera with a tripod or steady support
Focus accurately on the subject
Avoid digital zoom
Use a higher-quality lens
Clean the lens before taking the photo
Keep the ISO as low as possible
Use a fast shutter speed to reduce motion blur
Edit with AI upscaling tools
Sharpen the image carefully in editing software
Reduce noise before upscaling
Crop less to preserve detail
Export in a high-quality format
Avoid repeated saving in lossy formats
Retake the photo if the original is too low resolution