Radiation imagery chemistry: process – composition – or product th – Thermographic process – Heat applied after imaging
Reexamination Certificate
1999-09-10
2001-04-17
Le, Hoa Van (Department: 1752)
Radiation imagery chemistry: process, composition, or product th
Thermographic process
Heat applied after imaging
C430S348000, C430S349000, C430S404000, C430S405000, C430S415000, C430S448000
Reexamination Certificate
active
06218088
ABSTRACT:
FIELD OF THE INVENTION
The present invention relates to a method for obtaining excellent color images under wide shooting conditions by development processing and digital image processing of color negative type silver halide shooting materials having the specific relationship between the sensitivity and the gradient under specified conditions.
BACKGROUND OF THE INVENTION
With recent miniaturization (compactness) of cameras, miniaturization of built-in electronic flushes also rapidly proceeds, and the problem of underexposure caused by insufficient quantity of light is pointed out in color shooting materials. Further, with a recent reduction in format as employed in the APS, improvement in image quality also becomes more important than hitherto, so that color negative type shooting materials high in sensitivity and image quality have been eagerly desired.
On the other hand, the spread of lens-mounted film (film with lens) is remarkable, and smallness in size, lightness in weight and simple operation thereof have been supported by consumers. In the case of lens-mounted films, the insufficient quantity of light of electronic flushes particularly introduces a problem because of restrictions of smallness in size and low cost. It has been therefore a very important problem to increase the sensitivity of shooting light-sensitive materials.
For the lens-mounted films having no diaphragm mechanisms, however, the increased sensitivity of shooting light-sensitive materials results in too much exposure under the snow mountain or fine weather conditions in summer, which causes too high density of color negative films of the shooting light-sensitive materials. Accordingly, printing with an automatic printer takes a tremendous period of time. Alternatively, the density exceeds the reading density range of a CCD, so that it can not be read even by a digital printer. As described above, the serious problems have become clear.
For solving these problems, various lens-mounted films having diaphragm mechanisms have been devised. However, they can not be actually used, because they increase costs and impair the simplicity of operation.
Further, a method is also considered in which the gradation of shooting light-sensitive materials is softened to prevent the negative density from increasing too high even by shooting under high illumination. However, in such light-sensitive materials, the contrast becomes extremely low by shooting under normal or low illumination, which introduces a serious problem.
Furthermore, a process of reading the above-mentioned soft (low contrast) light-sensitive materials using a scanner mounted on a digital printer, and treating digitalized signals to adjust the contrast properly has also recently been proposed. However, when this process is actually performed, the granularity is significantly deteriorated at the stage that the contrast is emphasized by image processing, and particularly, a region decreased in exposure does not stand practical use.
SUMMARY OF THE INVENTION
An object of the present invention to provide a color negative type shooting light-sensitive material which invites no failure in shooting due to insufficient exposure in a compact camera or a film with lens, and for forming a color image of high quality.
Another object of the present invention is to provide an image formation method using the above-mentioned shooting light-sensitive material.
The above-mentioned problems have been solved by the following method.
That is to say, the present invention provides:
(1) an image formation method for forming a color image by imagewise exposing a color negative type silver halide photographic material comprising a transparent support having provided thereon at least three kinds of light-sensitive layers, followed by development processing at a temperature of 50° C. or more, which comprises the steps of reading with an image taking apparatus (imaging apparatus) an image obtained from the color negative type silver halide photographic material whose sensitivity and gradient satisfy the following relationship, applying digital image processing thereto, and then, obtaining output signals of three or more colors:
1.0≦(log
10
S
)·&ggr;≦2.5
S≧800
wherein S represents an ISO sensitivity, and &ggr; represents an average gradient of the three kinds of light-sensitive layers; and
(2) the image formation method described in the above (1), wherein the color negative type silver halide photographic material is imagewise exposed using the photographic material and a processing member comprising a support having provided thereon at least a processing layer containing a base and/or a base precursor, water corresponding to 0.1 to 1.0 time an amount necessary for swelling all coated layers except for back layers of both the photographic material and the processing member at their maximum is given to the photographic material and/or the processing member, and then, the photographic material is overlaid with the processing member in the form that the light-sensitive layer and the processing layer face each other, followed by heating at a temperature of 50° C. to 100° C. for 5 seconds to 60 seconds to form a color image.
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patent: 5756275 (1998-05-01), Takizawa et al.
patent: 5851749 (1998-12-01), Okawa et al.
patent: 5965332 (1999-10-01), Kikuchi
patent: 5976771 (1999-11-01), Kosugi et al.
patent: 6001543 (1999-12-01), Asami et al.
patent: 6013421 (2000-01-01), Nakamura et al.
patent: 10-20457 (1998-01-01), None
Burns Doane , Swecker, Mathis LLP
Fuji Photo Film Co. , Ltd.
Le Hoa Van
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