Abstract A photographic image-processing method which is capable of obtaining, from negative and positive films having an image whose density is in continuous gradation, a linear image representing the contour of that image. This method comprises the step of sandwiching a light scattering film between the negative and positive films in registration, thereby making a mask, and exposing a photographic paper to light at a right angle by way of the mask which is placed on the photographic paper, with a result that the light which passes through the light transmissive portion of the negative film is subjected to course alteration by the scattering film is order to pass through the light transmissive portion of the positive film, with a result that a linear contour image of the original image is formed on the photographic paper.
Inventors
👤 Takashi Yamaguchi
Bibliographic Details
Application Number—
JurisdictionUS
Data Sourcegoogle_patents
Last Synchronized2026-11-08 04:20
CPC Classifications
G; G03; G03C; G03C5/00; G03C5/08
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
70 words
A photographic image-processing method to obtain a contour image comprising the steps of: making positive and negative transparent films; laying up the positive and negative films with a transparent diffusion film therebetween and with the images of the positive and negative films in registration thereby forming a mask; and exposing a photosensitive sheet to electro-magnetic waves from above by way of the mask which is placed on the photosensitive sheet.
Claim 2
Dependent Claim
70 words
A photographic image-processing method to obtain a contour image comprising the steps of: making positive and negative transparent films; laying up the positive and negative films with a transparent diffusion film therebetween and with the images of the positive and negative films in registration thereby forming a mask; and exposing a photosensitive sheet to electro-magnetic waves from above by way of the mask which is placed on the photosensitive sheet.
Claim 3
Dependent Claim
16 words
A method according to claim 1, in which said diffusion film is a light scattering film.
Claim 4
Dependent Claim
16 words
A method according to claim 1, in which said diffusion film is a light refractive film.
Claim 5
Dependent Claim
53 words
A method according to claim 1, in which said diffusion film is a fluorescent material film which, upon receiving light which is selectively transmitted through and absorbed by one of said positive and negative films, emits fluorescence which is selectively transmitted through and absorbed by the other of said positive and negative films.
Claim 6
Dependent Claim
53 words
A method according to claim 1, in which said diffusion film is a phosphorescent material film which, upon receiving light which is selectively transmitted through and absorbed by one of said positive and negative films, emits phosphorescence which is selectively transmitted through and absorbed by the other of said positive and negative films.