Norimichi TSUMURA, Hideo NATORI, Takayuki KAWAGUCHI, Hideaki HANEISHI, Yoichi MIYAKE
Department of Information and Image Sciences,
Chiba University, 1-33, Yayoi-cho, Inage-ku
263-8522
Journal of The Society of Photographic Science and Technology of Japan, Vol. 61 No. 1, pp.28-32 (1998).[in Japanese]
Abstract
Automatic density correction has been used
to correct density failure in printing color
negatives. The method, however, is not always
significant to correct color balance and
density since the negative density which
is used to calculate the correction coefficient
is only measued in several fixed regions.
In this paper, a new method is introduced
to correct density failure considering the
scene content. The complexity of the image
calculated by using discrete Wavelet transformation
with Haar function was applied to segment
the negative film image dynamically. The
densities of those obtained regions were
measured and various parameters were calculated
to correct printing color negatives. It is
shown that the image manupulation method
proposed in this paper is effective for density
failure correction of 186 sample images.
Full paper ( to appeare )
[PDF] [PDF figures](in Japanese)