Mobile device equipped with digital image sensor
First Claim
Patent Images
1. A mobile device comprising:
- an image sensor producing digital signals representing a target when the image sensor is activated, the image sensor including an array of pixel elements, each of the pixel elements including a photodetector and an analog-to-digital conversion circuit, the photodetector producing an analog signal, the analog signal being converted to one of the digital signals;
a data memory to receive and store the digital signals, wherein memory cells in the data memory can be accessed randomly through a readout mechanism so that the digital signals can be selectively read out of the data memory;
a switching mechanism, the switching mechanism controlling the readout mechanism so that the digital signals is read out of the data memory in one of a plurality of predefined ways, a first one of the plurality of predefined ways comprising reading out only one or a few of the bit planes representing the digital signals so that a resultant image is a density reduced image and a second one of the plurality of predefined ways comprising reading the digital signals out in a decimation fashion so that a resultant image is a spatially reduced image; and
a data transmission circuit coupled to the data memory and receiving the digital signals therefrom, the digital signals being converted to data that are transmitted over a network.
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Abstract
A mobile device with the capability of imaging a natural scene or a document and transmitting the image over a network is presented. The mobile device includes a digital pixel sensor so that over-sampling of an image of a target is possible. The target may be a scene or a document and output images can be set for the appropriate target.
150 Citations
15 Claims
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1. A mobile device comprising:
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an image sensor producing digital signals representing a target when the image sensor is activated, the image sensor including an array of pixel elements, each of the pixel elements including a photodetector and an analog-to-digital conversion circuit, the photodetector producing an analog signal, the analog signal being converted to one of the digital signals; a data memory to receive and store the digital signals, wherein memory cells in the data memory can be accessed randomly through a readout mechanism so that the digital signals can be selectively read out of the data memory; a switching mechanism, the switching mechanism controlling the readout mechanism so that the digital signals is read out of the data memory in one of a plurality of predefined ways, a first one of the plurality of predefined ways comprising reading out only one or a few of the bit planes representing the digital signals so that a resultant image is a density reduced image and a second one of the plurality of predefined ways comprising reading the digital signals out in a decimation fashion so that a resultant image is a spatially reduced image; and a data transmission circuit coupled to the data memory and receiving the digital signals therefrom, the digital signals being converted to data that are transmitted over a network. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A mobile device comprising:
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an image sensor including digital pixel elements and a data memory, the digital pixel elements coupled to the data memory and producing a predefined number of frames of digital signals when the image sensor is activated to expose to a target for a predefined time; wherein each of the frames is read out of the digital pixel elements respectively and pixel values in each of the frames are selectively written into the data memory; a switching mechanism, the switching mechanism controlling the read out operation of the data memory so that the digital signals is read out of the data memory in one of a plurality of predefined ways, a first one of the plurality of predefined ways comprising reading out only one or a few of the bit planes representing the digital signals so That a resultant image is a density reduced image, and a second one of the plurality of predefined ways comprising reading the digital signals out in a decimation fashion so that a resultant image is a spatially reduced image; and a data transmission circuit coupled to the data memory and converting the pixel values in the data memory to data packets for data transmission transmitted over a network. - View Dependent Claims (12, 13, 14, 15)
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Specification