Images
When performing block-based coding for quantization, as in JPEG-compressed images, several types of artifacts can appear.
- Ringing
- Contouring
- Posterizing
- Staircase noise (aliasing) along curving edges
- Blockiness in "busy" regions (sometimes called quilting or checkerboarding)
Read more about this topic: Compression Artifact
Famous quotes containing the word images:
“no images of pastoral will,
But fear, thirst, hunger, and huddled chill.”
—James Vincent Cunningham (1911–1985)
“The base of all artistic genius is the power of conceiving humanity in a new, striking, rejoicing way, of putting a happy world of its own creation in place of the meaner world of common days, of generating around itself an atmosphere with a novel power of refraction, selecting, transforming, recombining the images it transmits, according to the choice of the imaginative intellect. In exercising this power, painting and poetry have a choice of subject almost unlimited.”
—Walter Pater (1839–1894)
“Language, the machine of the poet, is best fitted for his purpose in its rudest state. Nations, like individuals, first perceive, and then abstract. They advance from particular images to general terms. Hence the vocabulary of an enlightened society is philosophical, that of a half-civilised people is poetical.”
—Thomas Babington Macaulay (1800–1859)