Photography and imagery

BECQUEREL EFFECT, A photographic effect discovered by E, Becquerel (1895). Experimenting with the daguerreotype process. Becquerel found that a plate will produce a direct (positive) image if exposed first to diffuse daylight. See also Photochemistry and Photolysis and Photography and Imagery. 

NOTE Because of their large numbers, general books on photography are not included here. References that support some of tire mote specialized areas of photography and imagery, as reported in this entry, are included. 

Photography of the scene and any key features wiU prove invaluable later, and an imagery plan should be developed at an early stage to ensure that aU the essential points are covered [1]. 

Whereas the final results of traditional photography are usually in the form of prints or transparencies (with attendant problems), electronic imagery can be projected at will on cathode ray tubes and. if desired, combined with computer graphics—or conventional photos can be made from digitized information. 

The quantification of marine Utter is complicated by the size of the oceans and surfaces or volumes to be sampled, seasonal variations in intake and the presence of currents. Observation, trawling, direct coimting and filtration, overflight, video imagery, aerial photography, the use of submersibles and scuba diving are the main... 

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