The still camera includes an imaging section which forms an image of an object to be photographed and outputs analog image data; an A/D conversion section which performs A/D conversion upon this analog image data; an aperture device which controls the amount of light incident upon the imaging device;...http://www.google.com.au/patents/US6018362?utm_source=gb-gplus-sharePatent US6018362 - Still camera capable of efficiently selecting compression ratio