Voici le texte anglais :

Pictures of charts, can be converted, and used.

Generally chart pictures in gif, jpeg, pdf, png, tif, bmp and other formats can be used, when properly geo-referenced, to generate kap files. For the details about this process read the Chart Conversion Manual. Also, make sure to browse around the forum as there are a handful of interesting chart related threads.
The Zoomify image tiling format, can also be converted to bsb charts.