Motion adaptive image processing
AssigneeSony United Kingdom Limited
InventorsJames Edward BURNS, Karl James Sharman, Nicholas Ian Saunders, Robert Mark Stefan Porter
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Abstract
A method of image processing for converting interlaced images to progressive scan images comprises the steps of generating a motion dependent mixing value for determining the extent to which a preceding image field should be mixed with a current intra-field interpolated image field at a given pixel position, comparing the generated mixing value with a preceding historical mixing value, and if the comparison indicates an increase in motion, using the generated mixing value; otherwise, if the comparison indicates a decrease in motion, temporally filtering the generated mixing value prior to use.
Claims16
A method of converting interlaced images to progressive scan images, comprising the steps of:
- generating a motion dependent mixing value for determining the extent to which an adjacent image field should be mixed with a current intra-field interpolated image field at a given pixel position;
- comparing the generated motion dependent mixing value with a historical motion dependent mixing value;
- and
- if the comparison indicates an increase in motion, using the generated mixing value, otherwise
- if the comparison indicates a decrease in motion, temporally filtering the generated mixing value prior to use.
A method according to any one of the preceding claims in which the motion dependent mixing value is temporally filtered as:
- α′N=v.αN+w.αN−1,
- where v+w=1, αN is the generated motion dependent mixing value, and αN−1 is the historical mixing value.
Image processing apparatus for converting interlaced images to progressive scan images, comprising:
- mixing means operable to mix an adjacent image field with a current intra-field interpolated image field at a given pixel position;
- value generating means operable to generate a motion dependent mixing value for determining the extent to which the adjacent image field should be mixed with the current image field at a given pixel position;
- and
- comparator means operable to compare the generated motion dependent mixing value with a historical motion dependent mixing value, and in which in operation
- if the comparison indicates an increase in motion, the mixing means uses using the generated mixing value, otherwise
- if the comparison indicates a decrease in motion, the generated mixing value is temporally filtered prior to use by the mixing means.
Dependencies are inferred from the claim text.