Compression Artifact
Compression Artifact (Visual Distortion)
Compression artifacts are visible distortions introduced by lossy compression algorithms. Common artifacts include blockiness (JPEG macroblocks), ringing around sharp edges, color banding in gradients, and mosquito noise.
Detalhe técnico
JPEG artifacts result from quantization of DCT coefficients, where high-frequency detail is discarded. Artifacts worsen at lower quality settings and accumulate with repeated saves (generation loss).
Exemplo
```javascript
// Image compression via Canvas
canvas.toBlob(
blob => console.log(`Size: ${(blob.size/1024).toFixed(0)} KB`),
'image/jpeg',
0.8 // quality: 0.0 (smallest) to 1.0 (best)
);
// WebP output (25-34% smaller than JPEG)
canvas.toBlob(cb, 'image/webp', 0.8);
```
Formatos relacionados
Ferramentas relacionadas
C
Comprimir Imagem
R
Redimensionar Imagem
R
Recortar Imagem
G
Girar Imagem
E
Espelhar Imagem
C
Converter Imagem
M
Marca d'Água em Imagem
S
SVG para PNG
I
Imagem para Base64
A
Arredondar Cantos
A
Adicionar Borda
F
Filtros de Imagem
A
Ajustar Imagem
D
Desfocar Imagem
N
Nitidez de Imagem
T
Tornar Quadrada
G
Grayscale Image
S
Sepia Image
P
Pixelate Image
S
Strip Image Metadata