Method and apparatus for resolution improvement in digital capturing
First Claim
1. A method for enhancing the resolution of a digital image captured by a capturing device, wherein the capturing device includes a sensor, the method comprising:
- receiving the digital image from the sensor;
generating a white balanced image from the digital image;
detecting an at least one edge on the white balanced image; and
determining a weight for each of the at least one edge, wherein the sensor operates in Line Addition Off mode, wherein substantially all pixels in the white balanced image are generated by performing mathematical operations, wherein each operation is performed on cells belonging to a single row of the digital image, and wherein the value of green cells is multiplied by a predetermined factor, and the value of each cell is incremented by the average value of its horizontal neighboring cells.
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Abstract
A method and apparatus for enhancing the resolution of digital images. For each image a white balanced image is generated, which takes into account the differences in the colors of the sensor cell upon which the values are generated. Edge detection filters are then activated on the white balanced image and a weight is determined, indicating the probability that a feature which was detected as an edge is indeed an edge. At the last step, each detected edge is multiplied by the probability and is added to the luminance component, thus enhancing the edges. Preferred embodiments of the white balance image generation. Generating the white balanced image, detecting the edges and determining the weights are disclosed for sensors operating in Line Addition On mode and for sensors operating in Line Addition Off mode.
14 Citations
20 Claims
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1. A method for enhancing the resolution of a digital image captured by a capturing device, wherein the capturing device includes a sensor, the method comprising:
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receiving the digital image from the sensor; generating a white balanced image from the digital image; detecting an at least one edge on the white balanced image; and determining a weight for each of the at least one edge, wherein the sensor operates in Line Addition Off mode, wherein substantially all pixels in the white balanced image are generated by performing mathematical operations, wherein each operation is performed on cells belonging to a single row of the digital image, and wherein the value of green cells is multiplied by a predetermined factor, and the value of each cell is incremented by the average value of its horizontal neighboring cells. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A method for enhancing the resolution of a digital image captured by a capturing device, wherein the capturing device includes a sensor, the method comprising:
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receiving the digital image from the sensor; generating a white balanced image from the digital image; detecting an at least one edge on the white balanced image; and determining a weight for each of the at least one edge, wherein the sensor operates in Line Addition Off mode, wherein substantially all pixels in the white balanced image are generated by performing mathematical operations, wherein each operation is performed on pixels belonging to a single column of the digital image, and wherein the value of green cells is multiplied by a predetermined factor, and wherein the value of each cell is either incremented by the average value of its vertical non-immediate neighboring cells or is assigned the average value of its two vertical immediate neighboring cells. - View Dependent Claims (8, 9, 10, 11, 12)
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13. A method for enhancing the resolution of a digital image captured by a digital camera that includes a sensor, the method comprising:
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receiving the digital image from the sensor that includes a CCD sensor or a CMOS sensor; generating a white balanced image from the digital image; detecting an at least one edge on the white balanced image; and determining a weight for each of the at least one edge, wherein the sensor operates in Line Addition Off mode or Line Addition On mode, wherein substantially all pixels in the white balanced image are generated by performing mathematical operations, wherein each operation is performed on pixels belonging to a single column or a single row of the digital image, and wherein the value of green cells is multiplied by a predetermined factor, and wherein the value of each cell is incremented by the average value of its horizontal neighboring cells or its vertical neighboring cells. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20)
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Specification