Image differencing for analog photocell array
AssigneeIntel Corporation
InventorPhilip E. Mattison
Life of this patent
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Abstract
Under an embodiment, a system includes an array of analog photocells; a first plurality of shift cells, each shift cell in the first plurality of shift cells being coupled to a corresponding analog photocell; and a second plurality of shift cells, each shift cell in the second plurality of shift cells being coupled to a corresponding shift cell in the first plurality of shift cells; and a differential operational amplifier having a first input coupled to a terminating output of the first plurality of shift cells and a second input coupled to a terminating output of the second plurality of shift cells.
Claims18
A system comprising:
- an array of analog photocells;
- a plurality of analog holding registers, an output of each analog photocell in the array of analog photocells being coupled to a corresponding analog holding register;
- and
- a plurality of differential operational amplifiers, a first input of each differential operational amplifier being coupled to an analog photocell, a second input of each differential operational amplifier being coupled to the corresponding analog holding register for the analog photocell that is coupled to the first input.
A method comprising:
- transferring a signal from each analog photocell in an array of analog photocells to a corresponding register in a plurality of registers;
- and
- determining the difference between a signal from each analog photocell in the array of analog photocells and a signal from the corresponding register in the plurality of registers for the analog photocell.
Dependencies are inferred from the claim text.