RU2108611C1 - Process of taking of coded images - Google Patents

Abstract

FIELD: recovery of variograms and stereograms. SUBSTANCE: contact copying of photographic image on clear base is conducted through coding contact linear or lens raster with its movement in interval between exposures at angle to its lines by pertain value which are followed by photochemical processing. EFFECT: increased reliability and efficiency of process. 2 dwg

Description

 The invention relates to a technology for obtaining an encoded image, for example, in the form of semivariograms or stereograms, for the production of postcards, paintings, murals, photographs, stained-glass windows and other printing products, allowing the reproduction of several images.

 A known method of obtaining a dashed rasterized image, including the manufacture of negative, its conversion and imprinting on the photographic material obtained as a result of the image [1].

 However, this method is carried out in three stages, which greatly complicates the process of obtaining a dashed rasterized image and increases the complexity of the work.

 A known method of obtaining an encoded image, including contact copying of a photographic image on a transparent basis through an encoding linear raster or lens raster, installation on the registration pins of the raster, its movement and photochemical processing of film [2] - prototype.

 However, this method is based on the movement of the coding linear or lens raster strictly perpendicular to the lines of the raster. Since the width of the coding strips is about 0.02-0.03 mm, high accuracy is required when moving the coding raster. This is achieved by a lot of painstaking preparatory work for the manufacture of negatives, registration pins, holes and their marking or the use of high-precision mechanisms. The first option is complex and time-consuming, and the second is expensive, so the use of this method of obtaining an encoded image is limited and inaccessible to a wide range of users.

 The invention is aimed at simplifying and improving the accuracy of movement of the encoding raster, reducing the complexity of the work when obtaining an encoded image.

,
где
l - величина линейного перемещения кодирующего растра относительно базовой поверхности;
h - ширина кодирующей полосы;
α - угол между направлением перемещения и кодирующей полосой.This is achieved by the fact that the coding linear raster or lens raster is moved at an angle to its lines by an amount whose numerical value is determined from the expression

,
Where
l is the linear displacement of the coding raster relative to the base surface;
h is the width of the coding band;
α is the angle between the direction of movement and the coding strip.

 In FIG. 1 shows a movement pattern of an encoding linear raster upon receipt of an encoded image; in FIG. 2 is a fragment of the circuit of FIG. 1 to encode two plots.

 The method is as follows.

 To obtain an encoded image in which alternating lines of different images correspond to each plot, it is necessary to select the number of plots, the width of the coding strips and prepare the coding linear raster 1. Negatives are obtained from the original, two different negatives will be required to encode two plots (the number of plots may be more two).

где
l - величина линейного перемещения кодирующего растра относительно базовой поверхности;
h - ширина кодирующей полосы;
α - угол между направлением перемещения и кодирующей полосой.Upon receipt of encoded images, for example, by contact in a copy-copy machine, a base surface 3 is mounted on the glass, a negative is laid, then an encoding linear raster 1 and photographic material (photographic film, photographic layer, photographic plate) are installed. From above everything is pressed by a rubber rug, and from below the illuminator turns on. After exposure, the negative changes and the coding linear raster 1 moves at an angle to its lines (coding strips 2) by the value l, the numerical value of which is determined from the expression

Where
l is the linear displacement of the coding raster relative to the base surface;
h is the width of the coding band;
α is the angle between the direction of movement and the coding strip.

 In this case, the coding strip 2 is shifted by its width h, and the coding linear raster 1 moves from position 1 to 11. This corresponds to the movement of the coding linear raster 1 by l, which is directly proportional to the width of the coding strip and inversely proportional to tgα. For small values of the angle α, it is necessary to move the coding linear raster 1 by a significant value of l, which can be performed by simple mechanisms with high accuracy. The accuracy of the movement also depends on the cleanliness class of the base surface 3, along which the coding linear raster 1 moves.

 After repeated exposure and photochemical processing of the photographic material, an image (transparency) is obtained, where two scenes are inserted into each other.

 Similarly, it is possible to obtain an encoded image by using a lens raster that moves at an angle to its lines by l.

 This method can be applied not only in contact, but also in projection and photography production of vario and stereograms using a linear or lens coding raster.

 In some cases, continuous movement of a linear or lens raster is allowed during the entire exposure time of the photographic material.

 The use of this method of obtaining an encoded image greatly simplifies the process of moving an encoding linear raster, improves accuracy when performing this operation, and also reduces the complexity of work when obtaining an encoded image and makes the production of vario and stereograms more accessible for a wide range of users.

Claims (1)

A method of obtaining an encoded image, including copying a photographic image onto a photographic material on a transparent basis through a coding contact linear or lens raster when moving it between the exposure and photochemical processing of the photo material, characterized in that the coding linear or lens raster is moved at an angle to its lines by an amount whose numerical value is determined from the expression

where l is the linear displacement of the coding raster relative to the base surface;
h is the width of the coding band;
α is the angle between the direction of movement and the coding strip.

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