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Temperatura de Color
La expresión numérica del tono de luz, depende de la fuente de luz.
La unidad estándar para la temperatura de color se mide en Kelvin (K). La luz
solar tiene una temperatura de aprox 5600 K. Una temperatura inferior implica
una luz más cálida luz amarilla/rojiza, mientras que una temperatura mayor
supone luz fría un color azulado
La temperatura de color de la luz Tungsten es de 3200 K.
Exposición.
Es la cantidad de luz que capta el sensor de imagen. La exposición se controla
con la combinación de la apertura y la velocidad.
EV
El Valor de Exposición (EV) es un valor numérico que expresa la cantidad de luz
para la exposición dada, y depende del brillo del sujeto a fotografiar y de la
sensibilidad de la película. Si el sujeto es brillante, este valor numérico será
mayor y si el sujeto es oscuro el valor será inferior.
Histogram
El histograma es una representación gráfica de cómo se distribuye los píxeles
oscuros y claros en la imagen. El histograma le permite una comprobación
precisa de la exposición de la foto.
Sensibilidad ISO
ISOInternational Organization for Standardization; se refiere al nº asignado a
cada película inica la sensibilidad, el nº mayor tendrá mayor fotosensibilidad y
viceversa. Las cámaras digitalkes utilizan un ISO estandarizado.
JPEG
Joint Photographic Experts Group se ha establecido como el método de
compresión y descompresión estándar para imágenes digitalizadas. Si el ratio de
compresión es alto el tamaño de archivo será inferior pero la fotografía estará
más deteriorada
Microdrive
Desarrollado por IBM, las Microdrives son unos discos duros extrememente
pequeños que caben en la ranura de la tarjeta de memoria CompactFlash. Las
Microdrive están incorporadas en una tarjeta CompactFlash tipo II.
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