| Résumé | This report discusses the technique of ratio mapping as applied to headlamp intensity and illuminance maps and its use during the headlamp investigations currently being undertaken at the National Research Council of Canada.
In the first section of this report, the concept of the ratio map is discussed and the development of a ratio mapping procedure is described, while the following two sections describe two particular ratio mapping programs and their use. The first program, module ISC of the RATIO program library, constructs the ratio map for given pairs of headlamp intensity maps. The second program, module MAIN3 of the VIEW program library, constructs the ratio map for given pairs of headlamp illuminance maps, where the illuminance was mapped over a vertical plane situated at a fixed distance ahead of the vehicle in which the headlamps reside.
Two appendices have been included to provide source listings for the computer programs and their associated modules and to demonstrate typical output from a saaple program in each case. A brief comparison of the two sample mappings is offered in order to illustrate the interpretation of the ratio map. |
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