Aspects of calibration of sensors are described. A printing apparatus acquires image data and information concerning a face detection process performed on the image data from an image pickup apparatus. A lower present arm is supported in a manner to provide at least one axis of movement, the lower present arm capable of manipulation in a horizontal plane. A mean circuit produces a mean value of the second signals over a plurality of pictures of the input video signal. Processing modules are registered by class ID, category, whether the application needs a key, the number and types of input data types, and the number and type of output data types to register.