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Utilisation des fonctions de visualisation
FR
83
Vous pouvez agrandir une image pour l’examiner de plus près.
zHistogramme
Un histogramme est un graphique de distribution de luminance
indiquant combien de pixels d’une luminosité particulière sont
présents sur l’image. Cet appareil possède quatre affichages
d’histogramme séparés pour la luminance et le RVB, et chacun
indique la luminosité sur l’axe horizontal (le côté gauche est
noir, le côté droit blanc) et le nombre de pixels sur l’axe
vertical. La correction d’exposition change l’histogramme en
conséquence. Un exemple est présenté ci-dessous.
Les deux extrémités de l’histogramme ne comportent que des données à 100 % noires ou blanches*. La
vérification de l’histogramme vous permet de connaître l’état de l’image au préalable.
* En fait, une image couleur est exprimée en RVB. Ainsi le blanc est égal à R255, V255, B255 et le noir
égal à R0, V0, B0.
Agrandissement d’images
Sombre Clair
Nombre de pixels
Utilisez la
correction
d’exposition du
côté positif.
Cette compensation
éclaircit l’ensemble de
l’image, déplaçant tout
l’histogramme vers le
côté lumineux (côté
droit). Une correction
d’exposition du côté
négatif déplace
l’histogramme de
l’autre côté.
Multi-sélecteur
Touche
(Agrandissement) Molette de commande avant
Touche (Lecture)
Molette de commande
arrière
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