1. A cell phone comprising: an image sensor portion that outputs frames of image data; a processing system coupled to the image sensor portion, the processing system including plural hardware processing units, including: a first processing unit comprising first circuitry; and a second processing unit different than the first processing unit, the second processing unit comprising second circuitry different than the first circuitry; the processing system including an interconnection arrangement that conveys data from an output of the first processing unit to an input of the second processing unit; a memory containing instructions that cause the processing system to configure a pipelined arrangement in which one of said processing units processes one frame of image data while another of said processing units processes a different frame of image data; a setup module that sends information specifying operations to be performed on a first frame of data by the first and second processing units, before the pipelined arrangement begins processing said first frame of data; and a radio interface coupled to the processing system to enable wireless transmission of one or more frames of processed image data from the cell phone; wherein said instructions and information: cause the first processing unit to process a first frame of data at a first time, applying a first function; cause the same first processing unit to process said same first frame of data at a second, later time, applying a second function different than the first function; and cause the second processing unit to process said same first frame of data between said first and second times, the second processing unit applying a third function different than the first and second functions.