| 摘要 |
The present invention relates to a method of forming a representation of a composite biometric image. The method comprises sensing first (136) and second (146) successive partial images of a biometric object with a sensor during relative movement of the biometric object and the sensor, the sensor comprising an array of sensing elements defining an area smaller than an area of the biometric object to be formed as the representation, the first and second successive partial images overlapping each other along a direction of the relative movement. The method also comprises acquiring at least a first image portion (130, 140) and a second image portion (132, 142) from each of the first and second sensed partial images, the first image portion and the second image portion of each comprising different sensed image data along a direction orthogonal to a direction of relative movement of the biometric object and the sensor, the first image portions overlapping with each other, and the second image portions overlapping with each other. The method further comprises: determining first new data of the first image portion of the second partial image absent from the first image portion of the first partial image; and determining second new data of the second image portion of the second partial image absent from the second image portion of the first partial image. The method yet further comprises forming the representation from the image portions in dependence upon the determined new data, the step of forming the representation comprising forming a first image and second columns from data of the first and second image portions respectively of the at least first and second partial images. |
