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US 6,584,235 B1Granted
Wide dynamic range fusion using memory look-up
AssigneeMicron Technology, Inc.
InventorsEric R. Fossum, Abraham Kotlyar
Life of this patent
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Abstract
An image fusion is carried out using a look-up table. The look-up table is addressed by the different kinds of images that will be used to carry out the fusion. Each address in the look-up table contains a precomputed image fusion between the two different kinds of images.
Claims12
An image processing system, comprising:
- an image sensor, including an array of pixels that have units including rows and columns, arranged logically, each pixel including active pixel sensor, including an in-pixel buffer, and in-pixel selector, each pixel also including a photoreceptor which produces an output signal indicative of image information that is applied thereto;
- a controller element on the same image substrate with said image sensor, and controlling outputs of said pixels;
- first and second register elements, respectively receiving output signals from said pixels, including at least a first register element holding an output of said pixel for a longer period of capture and a second register element holding an output of the same pixel for a shorter period of capture;
- a look-up table memory, storing information indicative of an image fusion between different kinds of results for long and short captures, said look-up table memory being addressed with information from said first and second registers and outputting an image fusion result based on contents of said first and second registers.
1 more element
A method of determining fusion information, comprising:
- obtaining information about two different capture lengths of an image, one which is a shorted capture length and the other of which is a longer capture length;
- converting said information into first and second digital groups of bits in first and second register elements;
- obtaining a look-up table which is prestored with image fusion information based on said predetermined capture lengths;
- and
- using said first and second digital words to address the information in the look-up table to thereby read-out the information in the look-up table.
2 more elements
A method of determining fushion information, comprising:
- obtaining information about two different capture lengths of an image, one of which is shorter capture length and the other of which is a longer capture length;
- converting said information into first and second digital groups of bits in first and second register elements;
- obtaining a look-up table which is prestored with image fushion information based on said predetermined capture lengths;
- and
- using said first and second digital groups to bits to address the information in the look-up table to thereby read-out the information in the look-up table.
2 more elements
Dependencies are inferred from the claim text.