Red/near-infrared filtering for CCD cameras

Details Red/near-infrared filtering for CCD cameras Red/near-infrared filtering for CCD cameras

1995-07-28

1996-09-10

Peng, John K.

Television

Camera, system and detail

With single image scanning device supplying plural color...

348273, 348280, H04N 907

Patent

active

055554644

ABSTRACT:
A CCD camera is adapted for detecting red and near-infrared wavelengths by employing filters that are constructed to allow for the passage of only red light in certain areas and near-infrared light in other areas of the filter. The areas are designed to match the pixel geometry of the lens of a primary color CCD camera that has a predefined pattern of red, blue and green pixels. The match is such that the red bandpass filter areas overlay the red pixels, and the near-infrared bandpass filter areas match the blue and green pixel areas. The red, green and blue output lines of the CCD camera are supplied to a signal processor which uses the signals on these lines to provide combinations of red and near-infrared magnitude that are capable of detecting vegetation from a background. The camera is suitable for full color use again merely by removing the filter that provides R and NIR sensing without otherwise disabling or modifying the camera.

REFERENCES:
patent: 4037048 (1977-07-01), Walker
patent: 4651001 (1987-03-01), Harada et al.
patent: 4663656 (1987-05-01), Elabd et al.
patent: 4688085 (1987-08-01), Imaide
patent: 5132802 (1992-07-01), Osthues et al.
patent: 5350490 (1994-09-01), Lee
E. Franz, M. R. Gebhardt, K. B. Unklesbay, "The Use of Local Spectral Properties of Leaves as an Aid for Identifying Weed Seedlings in Digital Images," Transactions of the ASAE, vol. 34(2): Mar.-Apr. 1991, pp. 682-687.
B. B. Nitsch, K. Von Bargen, G. E. Meyer, "Visible and Near Infrared Plant, Soil and Crop Residue Reflectivity for Weed Sensor Design," ASAE, Paper No. 913006.
Sony brochure for lCCD R.G.B. Primary Color Filter Camera Module XC-711/711P.

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