Open main menu
Home
Random
Recent changes
Special pages
Community portal
Preferences
About Wikipedia
Disclaimers
Incubator escapee wiki
Search
User menu
Talk
Dark mode
Contributions
Create account
Log in
Editing
Lossy compression
(section)
Warning:
You are not logged in. Your IP address will be publicly visible if you make any edits. If you
log in
or
create an account
, your edits will be attributed to your username, along with other benefits.
Anti-spam check. Do
not
fill this in!
== Lowering resolution == A general kind of lossy compression is to lower the resolution of an image, as in [[image scaling]], particularly [[Decimation (signal processing)|decimation]]. One may also remove less "lower information" parts of an image, such as by [[seam carving]]. Many media transforms, such as [[Gaussian blur]], are, like lossy compression, irreversible: the original signal cannot be reconstructed from the transformed signal. However, in general these will have the same size as the original, and are not a form of compression. Lowering resolution has practical uses, as the [[NASA]] [[New Horizons]] craft transmitted [[thumbnail]]s of its encounter with Pluto-Charon before it sent the higher resolution images. Another solution for slow connections is the usage of [[Interlacing (bitmaps)|Image interlacing]] which progressively defines the image. Thus a partial transmission is enough to preview the final image, in a lower resolution version, without creating a scaled and a full version too.{{citation needed|date=November 2019}}
Edit summary
(Briefly describe your changes)
By publishing changes, you agree to the
Terms of Use
, and you irrevocably agree to release your contribution under the
CC BY-SA 4.0 License
and the
GFDL
. You agree that a hyperlink or URL is sufficient attribution under the Creative Commons license.
Cancel
Editing help
(opens in new window)