A CMOS Camera is the economical alternative to a CCD Camera. The process by which these sensors are made is one of their most important features. Since the image sensor and image processing circuit are made with the same process, light detection and analog to digital signal processing can be done on the same chip, which cuts down the steps to manufacture, hence making the production faster and cheaper.
CMOS sensors have the ability to read and process an image as efficiently as one single pixel at a time due to the integrated image processing circuitry. Since there is no need to shift electrons (as you would in a CCD camera), the power consumption of these devices is also reduced significantly.