H - Electricity – 04 – N
Patent
H - Electricity
04
N
H04N 5/208 (2006.01) H04N 9/64 (2006.01) H04N 5/14 (2006.01)
Patent
CA 2284923
A contour emphasizing circuit is provided with a number-of-pixels changing circuit (37) which changes the numbers of pixels of digital R, G, and B signals, a gamma correction circuit (39) which performs gamma correction on the output of the circuit (37), a Y-signal generating circuit (36) which generates luminance signals from the output of the circuit (37), an contour extracting circuit (38) which extracts contour components from the output of the circuit (36), a coefficient multiplying circuit (42) which outputs contour components for R, G, and B by multiplying the extracted contour components by coefficients Kr, Kg, and contour adding circuit (34r), (34g), and (34b) which respectively add the outputs of the circuit (39 and 42). Thus, the contour emphasizing circuit makes contour emphasis on the digital R, G, and B signals.
L'invention concerne un circuit d'accentuation de contours comprenant un circuit (37) de modification du nombre de pixels qui modifie le nombre de pixels des signaux numériques R, V et B, un circuit (39) de correction de gamma qui effectue une correction de gamma à la sortie du circuit (37), un circuit (36) générateur de signaux Y qui génère des signaux de luminance à partir de la sortie du circuit (37), un circuit (38) d'extraction de contours qui extrait des composantes de contours à partir de la sortie du circuit (36), un circuit (42) multiplicateur de coefficient qui fournit des composantes de contours pour des signaux R, V et B en multipliant les composantes de contours extraites par les coefficients Kr, Kv et Kb et des circuits (34r, 34g, 34b) d'addition de contours qui additionnent respectivement les sorties des circuits (39 et 42). Par conséquent, ce circuit d'accentuation de contours effectue une accentuation de contours au niveau des signaux numériques R, V et B.
Kurita Masanori
Suzuki Susumu
Fujitsu General Limited
Gowling Lafleur Henderson Llp
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