Color classification apparatus

A color classification apparatus for classifying color components of target objects, comprising:

• an imaging optical system;
• an image pickup device of an X-Y address scheme which performs storage on an imaging plane of said imaging optical system;
• optical bandpass filters optically arranged upstream said image pickup device and having a plurality of different selectable optical transmission wavelength bands;
• transmission wavelength selection means for selecting one transmission wavelength band from the plurality of transmission wavelength bands;
• read means for performing read access, from said image pickup device, to an area corresponding to said target object in each image information having passed through said optical bandpass filter, having the transmission wavelength selected by said transmission wavelength selection means, and picked up by said image pickup device;
• and
• means for correcting, in accordance with a positional shift of an image of said target object formed on said image pickup device, an address of said image pickup device at which said read means performs read access to the area.

A color classification apparatus for classifying color components of target objects, comprising:

• an imaging optical system;
• an image pickup device arranged on an imaging plane of said imaging optical system;
• a plurality of band-like optical bandpass filters which are optically arranged immediately upstream said image pickup device, formed into band-like shapes, and have optical transmission wavelength bands different from each other;
• means for conveying said target object;
• storage means for storing each image information picked by said image pickup device at a period in which said convey means moves an image of said target object on said image pickup device by a width of each of said band-like optical bandpass filter;
• and
• read means for performing read access to an area corresponding to a specific portion of said target object in each image information from said storage means storing the image information having passed through each band filter.

A color classification apparatus for classifying color components of target objects, comprising:

• an imaging optical system;
• a plurality of line sensors arranged such that a longitudinal direction is substantially parallel to an imaging plane of said imaging optical system;
• a plurality of optical bandpass filters optically arranged upstream said line sensors such that each color corresponds to each line sensor, and having optical transmission wavelength bands different from each other;
• storage means for storing each image information picked up by said line sensor;
• read means for performing read access to an area corresponding to said target object in each image information from said storage means storing the image information having passed through each band filter;
• and
• correction means for correcting, in accordance with a positional shift of each image information of said target object stored in said storage means, the area of each image information to be read by said read means.