. Dans-le-menu-image, . Dans-type, R. Sélectionner, and . Color, Ceci permettra d'utiliser certaines fonctionnalités par la suite. 3) Pour obtenir les surfaces projetées de grains en µm 2 il faut indiquer quelle est l'échelle des mesures réalisées (µm/pixels) Pour ce faire, sélectionner l'icône représentant un ligne sous la barre de menu et tracer un

. Ensuite, . Dans-le-menu-analyse, S. Dans, and . Scale, Une fenêtre permettant de fixer l'échelle de la photographie s'ouvre. L'indication Distance in pixels est déjà renseignée et correspond à la longueur en pixel de la barre d'échelle sur votre photographie. Known distance correspond à la valeur en µm correspondant qui faut entrer (500 µm dans notre exemple) Unit of length correspond au nom de l'unité (µm dans notre exemple)

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