A marker dot detecting device for a color image recording apparatus such as a color copying machine, color facsimile, or color printer. The marker dot detecting device includes a marker dot detecting unit for detecting a marker dot by detecting a plane size of binary image data having a preset marker...http://www.google.co.uk/patents/US5363212?utm_source=gb-gplus-sharePatent US5363212 - Marker dot detecting device for color image recording apparatus
