Methods and apparatus for automatically detecting image/video resolution and its color subsampling

An apparatus for detecting a format of image data, comprising:

• a first selector to select a first format;
• compute circuitry to calculate a statistic of at least a portion of the image data based on the first format;
• memory to store the calculated statistic for the first format;
• logic circuitry to cause said first selector, compute circuitry, and memory to operate for a plurality of further formats;
• a comparator to compare the calculated statistic corresponding to each of said formats;
• and,
• a second selector to pick, for further processing of said image, one of said plurality of formats responsive to said comparator.

A method for detecting a format of image data, comprising:

• selecting a first format comprising an image resolution and a subsampling format;
• calculating a statistic of at least a portion of the image data based on the first format;
• storing the calculated statistic for the first format;
• repeating said selecting, calculating, and storing steps for a plurality of further formats;
• comparing the calculated statistic corresponding to each of said formats;
• and,
• selecting for further processing of said image one of said plurality of formats responsive to said comparing step.

An apparatus for detecting a format of image data, comprising:

• a first selector to select a first format comprising an image resolution and a subsampling format;
• compute circuitry to calculate a statistic of at least a portion of the image data based on the first format;
• memory to store the calculated statistic for the first format;
• logic circuitry to cause said first selector, compute circuitry, and memory to operate on said plurality of further formats;
• a comparator to compare the calculated statistic corresponding to each of said formats;
• and,
• a second selector that picks, for further processing of said image, one of said plurality of formats responsive to said comparator.