1°STL SPCL image
Sous thème :
IMAGES PHOTOGRAPHIQUES
Quelles sont les couleurs de la colorcheker ?
1. Valeurs RVB
Prendre en photo au flash la color cheker : on prendra plusieurs photo avec des exposition différentes jusqu’à ce que patch blanc en bas à droite soit proche de 245
Avec gimp déterminer les valeurs pixel RVB de chaque patch Bluish green
R = V = B =
Orange yellow R =
V = B =
Cyan R = V = B =
Noir 2 R = V = B = Blue flower
R = V = B =
Yellow greeen R =
V = B =
magenta R = V = B =
Gris neutre 3.5 R =
V = B = Foliage
R = V = B =
Purple R = V = B =
Jaune R = V = B =
Gris neutre 5 R =
V = B = Blue sky
R = V = B =
Moderate red R =
V = B =
rouge R = V = B =
Gris neutre 6.5 R =
V = B = Ligth skin
R = V = B =
Purplish blue R =
V = B =
vert R = V = B =
Gris neutre 8 R =
V = B = Dark skin
R = V = B =
Orange R = V = B =
bleu R = V = B =
Blanc 9.5 R = V = B =
2. Diagramme de chromaticité CIE-xy
Utiliser
http://colormine.org/convert/rgb-to-yxy pour obtenir les coordonnées x et y.
x = y =
x = y =
x = y =
x = y = x =
y =
x = y =
x = y =
x = y = x =
y =
x = y =
x = y =
x = y = x =
y =
x = y =
x = y =
x = y = x =
y =
x = y =
x = y =
x = y = x =
y =
x = y =
x = y =
x = y = Placer la couleur obtenue sur le diagramme :
