Image analysis – Applications
Reexamination Certificate
1995-10-12
2002-01-29
Couso, Jose L. (Department: 2621)
Image analysis
Applications
Reexamination Certificate
active
06343137
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a method of processing an image wherein a photographic image is subjected to a desired image conversion process.
2. Related Background Art
An image conversion process for image information signals will be described hereinbelow in connection with a so-called optical “cross screen filter” effect. With the “cross screen filter” effect, bright beams can be generated radially from a high luminance portion of an image.
Conventionally, an optical filter has been used as means for yielding such effect.
Optical filters commonly used in obtaining special effect photographs are those shown in Table 1.
TABLE 1
Type of Optical Filters
Type
Name
Effect
Color
Purple
Hue of entire image is changed to purple
Zoomy
Stream
Normal stream of image center and one-
Spot
directional stream of image periphery
Radial
Radial stream as in zooming
Cyclone
Dynamic swirling stream
Aurora
Stream as of aurora streamers emanat-
ing from one point of image periphery
Soft
Soften II
Soft image effect with clear focus-
Foggy
(B)
sing point
Portrayer
Soft-tone flesh tint
Foggy
Whitish in aggregate as if photo-
graphed in fog
Mist
Coloring image periphery with soft
Circle
color tone
Cross
Cross
4 bright beams from spot in image
Rainbow
Screen
Snow
6 bright beams from spot in image
Cross
Sunny
8 bright beams from spot in image
Cross
Rainbow
18 bright beams of rainbow color
Image 18X
rings about spot in image
Mirage
Mirage
One image is divided into 3 super-
3F
posed images; multi-superposed effect
As seen from Table 1, the snow cross and the sunny cross have a similar effect although they have a different number of radial bright beams, six and eight, respectively. The surface patterns of the cross screen, snow screen and sunny cross are shown in
FIGS. 2
to
4
. These patterns each have fine grooves engraved on the surface thereof. The grooves in a magnified scale are shown in FIG.
5
and the diffraction pattern is shown in FIG.
6
. Bright beams emanate in the direction perpendicular to the groove, with the beam luminance being maximum at the center from which the beam starts and gradually lowering its luminance toward the periphery.
The “cross screen filter” effect can electrically be realized based on simulation of change in beam luminance. Particularly, a spatial filter matrix as shown in
FIG. 7
is considered on an image screen plane constructed of 512×512 pixels, for example. A pixel having a high luminance is disposed at the center of the matrix. The matrix is then added with luminance data to obtain the luminance change in conformity with the function of FIG.
6
. Thus, it is possible to electrically add the cross screen filter effect to a still image after it is photographed.
With the above method, it is possible to have the effect equivalent to that of various optical filters through an electrical process. However, the above method is associated with the following problems.
(1) Generally, the photographer and the operator performing the special effect processing are not the same person.
(2) The intent of the photographer is not reflected at the time (or in the procedure) of the special effect processing.
SUMMARY OR THE INVENTION
In view of the above problems, photographing conditions at the time of photographing and conversion process conditions assigned at the time of photographing are used as parameters for performing the conversion (special effect) process of the present invention, so that the intent of a photographer can be reflected in the special effect processing.
The other objects of the present invention will become apparent from the accompanying drawings and the following detailed description.
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“The Joy of Photography”, Eastman Kodak Co., Apr. 1981.
Katsuma Makoto
Kimura Hiroyuki
Matsumura Susumu
Ohmura Hiroshi
Takahashi Koji
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