What does JPEG stand for?
AnswerJoint Photographic Experts Group
JPEG is named after the Joint Photographic Experts Group, the committee that created the standard.
Tech · Facts & stats
JPG facts & stats
7 fact-checked facts about JPEG images, each with the reason behind it. 5 more are in today's round and join this page after it closes.
The basics
Which kind of image is JPEG best suited for?
AnswerPhotographs with smooth color changes
JPEG compresses photos with gradual color changes very well, but can blur sharp text and line art.
Going deeper
What is EXIF data in a JPEG photo?
AnswerMetadata such as camera settings and date taken
EXIF stores details like shutter speed, date and camera model inside the image file.
How many bits per color channel does a standard baseline JPEG use?
Answer8
Baseline JPEG uses 8 bits per channel, giving 256 possible levels in each channel.
JPEG keeps more brightness detail than color detail because human eyes are more sensitive to what?
AnswerChanges in brightness
Eyes notice brightness detail more than color detail, so JPEG can store color at lower resolution.
Expert level
Standard JPEG splits an image into blocks of what size before transforming them?
Answer8 by 8 pixels
Baseline JPEG processes the image in 8x8 pixel blocks, which is why heavy compression looks blocky.
In which year was the first JPEG standard published?
Answer1992
The original JPEG standard, ITU-T T.81, was published in 1992.
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