single signal lines and each of the single signal lines may alternatively be buses fig5 illustrates one embodiment of an image sensor implementing the methods and apparatus described herein image sensor 1000 includes an imaging core 1010 and components associated with the operation of the imaging core the imaging core 1010 includes a pixel matrix 1020 having an array of pixels e g pixel 300 and the corresponding driving and sensing circuitry for the pixel matrix 1020 the driving and sensing circuitry may include one or more scanning registers 1035 1030 in the x and y direction in the form of shift registers or addressing registers buffers line drivers for the long reset and select lines column amplifiers 1040 that may also contain fixed pattern noise fpn cancellation and double sampling circuitry and analog multiplexer mux 1045 coupled to an output bus 1046 fpn has the effect that there is non uniformity in the response of the pixels in the array correction of this non uniformity needs some type of calibration for example by multiplying or adding subtracting the pixel 39 s signals with a correction amount that is pixel dependent circuits and methods to cancel fpn may be referred to as correlated double sampling or offset compensation and are known in the art accordingly a detailed description is not provided the pixel matrix 1020 may be arranged in n rows of pixels by n columns of pixels with n u2267 1 with each pixel e g pixel 300 is composed of at least a photosensitive element and a readout switch not shown a pixel matrix is known in the art accordingly a more detailed description is not provided the y addressing scan register s.