1. An image sensor, comprising: a multiplicity of pixel sensor regions each having a plurality of sensor elements; a clocked sigma/delta analog-to-digital converter; and an optical configuration for imaging an image to be recorded onto said multiplicity of pixel sensor regions, during a recording of the image for each of said multiplicity of pixel sensor regions measured values of said plurality of sensors elements are averaged resulting in average values and each of the average values corresponding to a pixel of a recorded image, and within a sampling period of the image to be recorded the measured values of said plurality of sensor elements of at least one of said multiplicity of pixel sensor regions being fed successively to said clocked sigma/delta analog-to-digital converter for averaging.