As chlorophyll reflects strongly in the infrared region, living vegetation is strongly reveals in false colour photography.Īlthough photography is an extremely useful and widely employed method for sensing the resources of the earth its usefulness is limited as a space sensor. Therefore, these films are called false colour films.įalse colour films have the ability to penetrate haze, further they are sensitive to charges of reflectance of vegetation. Green appears blue, red becomes green and photographic infrared is recorded as red. In false colour films also there are three layers but in these the infrared emulsion substitutes the blue emulsion owing to this unusual representation of colours result. These three bands together give rise to true picture because these colours are complimentary colours. These three layers are recorded blue, green and red special bands. The colour films are made up of three layers of emulsions. The red and infrared parts of the spectrum can penetrate haze and clear pictures can be made in wet as dry areas. By using minus blue filters, only red and infrared parts of the spectrum can be recorded. Black and white infrared films are particularly sensitive to visible and infrared rays.
Types of imagery sensors software#