MSU Super-Precision Filter

Filter for colour-depth enhancing

• Method ideas: Dr. Dmitriy Vatolin
• Implementation: Artem Titarenko

Filter is intended for increasing the colour depth of video (bits per pixel) while preserving details and borders.

Main problem of this method is slow processing speed. But it can be applied with MSU Super-Resolution filter - in this case temporary results of the latter filter will be used by the former, and they will work together slightly slower than each taken separately.

Examples

Filter is applied for colour depth increasing from 5 to 8 bits per channel. All examples are presented as extracted video frames and video sequences. Video codec DivX 4.12 in Quality-based mode was used for compression.

The first example is from “amelie” sequence:

Source frame (5 bits per channel)

Processed with MSU Super-Precision filter (8 bits per channel)

Histogram of source frame

Histogram of processed frame

Video is here (872 KB).

The next example is from “toy” sequence:

Source frame (5 bits per channel)

Processed with MSU Super-Precision filter (8 bits per channel)

Histogram of source frame

Histogram of processed frame

Source frame (5 bits per channel)

Processed with MSU Super-Precision filter (8 bits per channel)

Histogram of source frame

Histogram of processed frame

Video is here (742 KB).

The next example is from “mobile” sequence:

Source frame (5 bits per channel)

Processed with MSU Super-Precision filter (8 bits per channel)

Histogram of source frame

Histogram of processed frame

Source frame (5 bits per channel)

Processed with MSU Super-Precision filter (8 bits per channel)

Histogram of source frame

Histogram of processed frame

Contacts

E-mail: video@graphics.cs.msu.ru

Please read MSU filters FAQ before mailing.