Method apparatus, and recording medium for smoothing...

Details Method apparatus, and recording medium for smoothing... Method apparatus, and recording medium for smoothing...

2005-01-18

2009-06-23

Kassa, Yosef (Department: 2624)

Image analysis

Image enhancement or restoration

Image filter

C382S274000, C382S275000, C358S003260, C358S003270, C358S463000

Reexamination Certificate

active

07551794

ABSTRACT:
A smoothing calculator determines a smoothed mean luminance value C1×μ(t)+(1−C1)μ′(t−1) based on a mean luminance value μ(t) input at time t and a smoothed mean luminance value μ′(t−1) read at time (t−1) from a buffer, and outputs the smoothed mean luminance value C1×μ(t)+(1−C1)μ′(t−1) as the smoothed mean luminance value μ(t) of the mean luminance value μ(t). Coefficient C1 is greater than 0 but smaller than 1. Gradation conversion responsive to luminance variation from frame to frame in a moving image is thus achieved.

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patent: 10-283470 (1998-10-01), None

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