Film grain simulation technique for use in media playback devices
AssigneeThomson Licensing
InventorsCristina Gomila, Joan Llach, Jeffrey Cooper
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Abstract
Simulation of a block of film grain for addition to a block of an image occurs by first establishing at least one parameter at least in part in accordance with an attribute of the image block At least one at least one block of film grain is simulated from at least one film grain pattern generated in accordance with the at least one parameter. In particular, the film grain pattern is generated using a bit accurate technique.
Claims43
A method for simulating a film grain block, comprising the steps of:
- establishing at least one parameter at least in part in accordance with an attribute of an image block;
- and
- simulating at least one block of film grain from at least one film grain pattern generated in accordance with the at least one parameter.
A method for simulating a film grain block for an image block, comprising the steps of:
- establishing at least one parameter at least in part in accordance with an attribute of the image block;
- simulating at least one block of film grain with bit accuracy in accordance with the at least one parameter;
- and
- blending block of film grain with the image block.
Apparatus for simulating a film grain block for blending with an image block, comprising:
- means for establishing at least one parameter at least in part in accordance with an attribute of the image block;
- and
- means for simulating at least one block of film grain by generating at least one film grain pattern in accordance with the at least one parameter.
A computer readable medium for causing a computer to simulate film grain for blending with an image block, comprising the steps of:
- first means for causing the computer to establish at least one parameter at least in part in accordance with an attribute of the image block;
- and
- second means for causing the computer to simulate at least one block of film grain with bit accuracy in accordance with the at least one parameter.
A method for simulating a film grain block for blending with an image block, comprising the steps of:
- establishing at least one parameter at least in part in accordance with an attribute of the image block;
- and,
- simulating the at least one block of film grain in accordance with the at least parameter by accessing a database of film grain patterns.
A method for randomly generating film grain samples for blending with image samples, comprising the steps of:
- initializing a seed of a pseudo-random number generator upon receipt of at least one film grain parameter;
- and
- generating at least one film grain sample by randomly accessing a database of film grain patterns in accordance with the random number.
Dependencies are inferred from the claim text.