Importance

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Abstract

An apparatus and method is disclosed for producing a plurality of video signals to be processed by an image processor, where the video signals are representative of light reflected from a source region, such as a segment of an agricultural field. The apparatus includes a light receiving unit for receiving the light reflected from the source region and a multi-spectral sensor coupled to the light receiving unit for converting the light received by the light receiving unit into the video signals. The multi-spectral sensor includes a prism for dividing the light received by the light receiving unit into a plurality of light components, a plurality of light-detecting arrays each having a plurality of pixels for receiving the light components and producing electronic signals in response thereto, and a sensor control circuit for converting the electronic signals into video signals and for controlling the responsiveness of the pixels of the light detecting arrays to the light components. The light may be received by the light receiving unit at a variety of locations, such as on an agricultural vehicle, on an aircraft, or on a satellite. Also disclosed is use of an ambient light sensor to determine an ambient light level based upon which the video signals may be adjusted, and use of a light source to provide additional light to the source region. Further, an apparatus and method is disclosed for producing images of an agricultural field, based upon the video signals, that may be analyzed in real time for characteristics such as the nitrogen content of crops, and for storing such images for later analysis.

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First Claim