Which file extension is most common for JPEG images?
Answer.jpg
.jpg and .jpeg are the common JPEG extensions.
Tech · Facts & stats
JPEG facts & stats
7 fact-checked facts about jpeg images, compression and digital photos, each with the reason behind it. 5 more are in today's round and join this page after it closes.
The basics
JPEG is best suited for which kind of image?
AnswerPhotographs
JPEG handles smooth tones in photos well.
Going deeper
In which year was the JPEG standard first published?
Answer1992
The JPEG standard was released in 1992.
Which mathematical transform is at the heart of JPEG compression?
AnswerDiscrete cosine transform
JPEG applies the DCT to image blocks.
What is the metadata that cameras store inside JPEG files called?
AnswerEXIF
EXIF records settings like exposure and date.
Expert level
Which color space does JPEG commonly convert images into?
AnswerYCbCr
Separating brightness from color helps compression.
What is reducing color detail more than brightness detail called?
AnswerChroma subsampling
The eye is less sensitive to color detail.
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