TIFF Compression Overview |
|
|
Compression algorithms decrease the image file size by grouping same-colored pixels,
averaging color transitions and encoding delta differences
between scan lines. There are two basic classes of
compression algorithms:
-
Lossy
compression averages out differences with an
approximate rendition of the image resulting.
-
Lossless
compression keeps all of the detail of the original
image.
Lossy compression provides smoother
color transitions, which is useful for color photographs. Lossless algorithms are generally better for
line art, images that contain significant areas
of exactly the same color (including background color),
and text.
TIFF supports several compression algorithms:
-
CCITT group 4, 3-2D & 3, popular for
monochrome (black & white) scanned or rasterized
line art or document images
-
PackBits
-
LZW (Lempel-Ziv-Welch), popular for color and
grayscale images
-
JPEG, rarely used in TIFF files
JPEG vs. TIFF |
|
Other TIFF Information Sites
|
