METHOD FOR READING A TWO-DIMENSIONAL MATRIX OF PIXELS AND DEVICE FOR IMPLEMENTING SUCH A METHOD
First Claim
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1. A method for reading a two-dimensional matrix of pixels of an image sensor, said matrix being organized in blocks of pixels forming macropixels, each macropixel being readable independently of one another in high resolution mode and/or low resolution mode, wherein it comprises the steps consisting:
- during the selection of the high resolution readout mode for a macropixel, in reading and storing the values of the pixels thereof, in order to define a reference macropixel;
during the subsequent high resolution readout cycles of this macropixel, in forming the difference between the read values of the pixels thereof and the values of the corresponding pixels of the reference macropixel.
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Abstract
The invention relates to a method for reading a two-dimensional matrix (12) of pixels of an image sensor, said matrix being organized in blocks of pixels (16) forming macropixels, each macropixel being readable independently of one another in high resolution mode and/or in low resolution mode.
According to the invention, this method comprises the steps consisting:
- during the selection (at 50) of the high resolution readout mode for a macropixel, in reading (at 58) and storing (at 60) the values of the pixels thereof, in order to define a reference macropixel;
- during the subsequent high resolution readout cycles of this macropixel (at 62), in forming (at 66) the difference between the read values of the pixels thereof and the values of the corresponding pixels of the reference macropixel.
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Citations
10 Claims
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1. A method for reading a two-dimensional matrix of pixels of an image sensor, said matrix being organized in blocks of pixels forming macropixels, each macropixel being readable independently of one another in high resolution mode and/or low resolution mode, wherein it comprises the steps consisting:
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during the selection of the high resolution readout mode for a macropixel, in reading and storing the values of the pixels thereof, in order to define a reference macropixel; during the subsequent high resolution readout cycles of this macropixel, in forming the difference between the read values of the pixels thereof and the values of the corresponding pixels of the reference macropixel. - View Dependent Claims (2, 3, 4)
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5. A device for reading a two-dimensional matrix of pixels of an image sensor, said matrix being organized in blocks of pixels forming macropixels, the device comprising means for reading each macropixel independently of one another in high resolution mode and/or in low resolution mode, wherein it comprises:
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means for storing the values of the pixels of a macropixel when the high resolution readout mode is selected for it, in order to define a reference macropixel; and means for fonming the difference between the read values of the pixels of this macropixel and the values of the corresponding pixels of the reference macropixel. - View Dependent Claims (6, 7, 8, 9, 10)
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Specification