What technique is used by JPEGs for compression?

The correct answer is C. DCT. JPEG images use Discrete Cosine Transform (DCT) as their core compression technique. DCT converts spatial image data (pixel values) into frequency-domain coefficients. High-frequency components (fine details) can then be discarded or reduced with minimal perceptual impact on…

Submitted by weili_xi· Apr 18, 2026Disk Forensics

Question

Options

AZIP
BTCD
CDCT
DTIFF-8

How the community answered

(34 responses)

A
3% (1)
C
94% (32)
D
3% (1)

Explanation

JPEG images use Discrete Cosine Transform (DCT) as their core compression technique. DCT converts spatial image data (pixel values) into frequency-domain coefficients. High-frequency components (fine details) can then be discarded or reduced with minimal perceptual impact on the image, achieving significant compression. This is why JPEG is a lossy format-some data is permanently removed. ZIP is a general-purpose lossless compression algorithm, TIFF-8 is a file format rather than a compression method, and TCD is not a recognized compression standard.

Topics

#JPEG Compression#DCT#Image Formats

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