ラスター vs ベクター画像—完全技術ガイド 2026
新着2026-02-011分で読めます1ツール
PNGとJPGはラスター。SVGはベクター。違いを理解して適切な形式を選ぶ。
Raster Images (Pixel-Based)
Raster = grid of pixels. PNG, JPG, WebP. Zooming causes loss of sharpness. Ideal for photographs.
Vector Images (Math-Based)
Vector = mathematical paths. SVG. Zooming doesn't affect sharpness. Ideal for logos and icons.
When to Use Each
Raster: photos, photography. Vector: logos, icons, graphics. Convert SVG to PNG when you need compatibility.
Frequently Asked Questions
- What is the difference between PNG and SVG?
- PNG is raster—pixel-based. SVG is vector—scales without quality loss.