Information processing apparatus, information processing method, and program
AssigneeSony Corporation
InventorShogo TAKANASHI
Life of this patent
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Abstract
There is provided an image archiving method for use with a writing target, comprising the steps of receiving a series of captured images of the writing target, detecting difference between first and second candidate received images separated by a predetermined period of time, where additive differences are indicative of writing and subtractive differences are indicative of erasure; upon detecting subtractive difference, temporarily retaining a last candidate image captured prior to the detection, and detecting whether the subtractive difference relative to the retained image exceeds a subtraction threshold amount; and if so, then storing the retained image.
Claims25
An image archiving method for use with a writing target, comprising the steps of:
- receiving a series of captured images of the writing target;
- detecting difference between first and second candidate received images separated by a predetermined period of time, where additive differences are indicative of writing and subtractive differences are indicative of erasure;
- upon detecting subtractive difference,
- temporarily retaining a last candidate image captured prior to the detection, and
- detecting whether the subtractive difference relative to the retained image exceeds a subtraction threshold amount;
- and if so, then
- storing the retained image.
An image archiving method for use with a writing target,
- comprising the steps of:
- receiving a series of captured images of the writing target;
- detecting difference between first and second candidate received images separated by a predetermined period of time, where additive differences are indicative of writing and subtractive differences are indicative of erasure;
- upon detecting additive difference,
- detecting whether an additive difference between candidate received images exceeds a first addition threshold amount;
- and if so, then
- detecting whether an additive difference between candidate received images then falls below a second addition threshold amount;
- and if so, then
- storing the candidate received image corresponding to when the additive difference between candidate received images falls below the second addition threshold amount.
An information processing apparatus adapted to selectively archive images of a writing target, the information processing apparatus comprising:
- an input operable to receive a series of captured images of the writing target;
- a difference detection processor, adapted to detect difference between first and second candidate received images separated by a predetermined period of time, where additive differences are indicative of writing and subtractive differences are indicative of erasure;
- and
- upon detecting a subtractive difference,
- the difference detection processor is adapted to temporarily retain the last candidate image captured prior to the detection;
- detect whether the subtractive difference relative to the retained image exceeds a subtraction threshold amount;
- and if so, then
- the difference detection processor is adapted to store the retained image in a storage unit.
An information processing apparatus adapted to selectively archive images of a writing target, the information processing apparatus comprising:
- an input operable to receive a series of captured images of the writing target;
- a difference detection processor, adapted to detect difference between first and second candidate received images separated by a predetermined period of time, where additive differences are indicative of writing and subtractive differences are indicative of erasure;
- and
- upon detecting an additive difference,
- the difference detection processor is adapted to detect whether an additive difference between candidate received images exceeds a first addition threshold amount;
- and if so, then
- the difference detection processor is adapted to detect whether an additive difference between candidate received images then falls below a second addition threshold amount;
- and if so, then
- the difference detection processor is adapted to store, in a storage unit, the candidate received image corresponding to when the additive difference between candidate received images falls below the second addition threshold amount.
Dependencies are inferred from the claim text.