JPEG Compression: Quality Settings and Artifacts
Master JPEG compression quality levels, avoid artifacts, and choose optimal settings for photos, thumbnails, and web images.
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Tags: image, jpeg, compression
JPEG Compression Guide: Quality Settings, Artifacts, and Best Practices JPEG has been the dominant format for photographic imagery on the web for over 30 years, and for good reason: it achieves remarkable file size reductions on photographs while keeping visual quality high. But JPEG is also widely misunderstood. Most people adjust a single "quality" slider without knowing what it controls or why certain quality settings produce visible artifacts while others don't. This guide goes deeper. You'll learn how JPEG compression actually works, what the quality scale represents, when artifacts appear and why, and where the sweet spot sits for different use cases — with code examples using ImageMagick and Python Pillow. How JPEG Compression Works JPEG compression happens in several stages: 1.…
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