CA1162089A - Stereoscopic image and method of its realization - Google Patents
Stereoscopic image and method of its realizationInfo
- Publication number
- CA1162089A CA1162089A CA000385418A CA385418A CA1162089A CA 1162089 A CA1162089 A CA 1162089A CA 000385418 A CA000385418 A CA 000385418A CA 385418 A CA385418 A CA 385418A CA 1162089 A CA1162089 A CA 1162089A
- Authority
- CA
- Canada
- Prior art keywords
- platelets
- images
- support
- polygraphic
- areas
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
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- Spectrometry And Color Measurement (AREA)
Abstract
ABSTRAC OF THE DISCLOSURE:
A stereoscopic image and method of making same.
The image includes a viewing plane and rigid platelets of non-transparent material fixed to the viewing plane. The platelets are parallel with two mutually perpendicular deirctions, making an angle of 45° with the horizontal.
The platelets in each direction are different both in size and shape and are determined to form one different image in each direction so as to form one different image in each direction through the shadow projected by the platelets.
A stereoscopic image and method of making same.
The image includes a viewing plane and rigid platelets of non-transparent material fixed to the viewing plane. The platelets are parallel with two mutually perpendicular deirctions, making an angle of 45° with the horizontal.
The platelets in each direction are different both in size and shape and are determined to form one different image in each direction so as to form one different image in each direction through the shadow projected by the platelets.
Description
OS~9 This invention relates to a panel for producing two stereoplastic images, and to a method of making same. The -invention finds its application particularly in political posters, propaganda, decoration and advertisement.
There is known a plastic image pan~l,used for creating shadow images by means of space geometrical forms, which panel produces one image.
The disadvantages of these panels lie in their sta-tic nature, the complexity in -the preparation of space geometrical forms and, most of all, the availability of a single image on one and the same viewing plane.
: An object of the present invention is to provide.a panel for stereoplastic images and a method of making it, providing two images on one and the same viewing plane when using relatively simple platelets instead of space geometrical forms.
As claimed hereinj this object is achieved in a panel capable of producing two stereoplastic images, said panel comprising: a planar support intended to stand upright and image components for shadow images fixed to said support, characterized in that said components:
- are platelets made of rigid non-transparent . material;
- are fixed, by one edge thereof as a base, to said support so as to project perpendicularly from said support;
- are distributed on said suppor-t so as to lie in planes extending in mutually perpendicular directions, each direction making an angle of 45 with the horizontal;
- are, in each plane, different in size and shape, and - are arranged in said planes in predetermined compositions suitable, when hit by light coming from one of 08g said directions, to induce shadows defining on said support one of said images and, when hit by light coming from -the other of said directions, to induce shadows defining on said support the other of said.images, The platelets are preferably L-shaped and are attached with one of their sides to the viewing plane.
The invention, as claimed therein, is also a method of making a panel as claimed in claim 1, comprising: making two images on one single plane from two polygraphic originals;
subjecting said polygraphic originals to screening using a poly-graphic screen producing points; separately calcuIating the areas of said screen points and equating each area to that of a square of which the side has the length of said edge base of said platelets; determining the height of said platelets analyt-ically for a given light angle; arranging said platelets according to said polygraphic originals, in planes making an angle of 90 therebetween, whereby the areas of the shadows made by:the platelets in one of said planes correspond to the areas of the screen points of one of said images, and the areas: of the shadows made by the platelets in the other of said planes ~:~ .correspond to the areas of the screen points of the other of said images.
: : The main advantage~ of the stereoplastic image panels ~: are as follows.
i) The panels carry a double amount of information on one and the same viewing plane;
ii) The images are kinetic in their nature and are var:Lable when the variation of the images is not accomplished by mechani-cal or any other devices, but is a result of the Earth's rota-tion around its axis (in sunshine) or o the movement of the observer (in conditions of diffuse light). During the evening hours of the day, the variation of the images is obtained by ~ ~ .
.J ~ 2 -08~
means of a lighting installation, which is switched-on periodically at the ieft and right side of the decorative panel r respectively;
iii) The stereoplastics make it possible to obtain large-scale images of a high duration.
In-the appended drawings, an embodiment of the inven-tion is shown, wherein:
Fig. 1 is a fragment of an image, accomplished using a polygraphic screen;
Fig. 2 is the fragment of Fig. 1, implemented using : /
/
- 2a -1 16~08~
the method of shady screen;
Fig. 3 is the direction of orientation oE the decorative panel;
Fig. 4 illustrates the principle involved in the making of the stereoplastic image;
Fig. S illustrates the analytical solution for the determination of the heights of the platelets;
Figs. 6a and 6b are implementations of the stereo-plastic image.
Two ~iack and white graphics or two non-colour photographies, submitted to screening using a polygraphic screen, serve as an original Eor the making of two images on one and the same plane (see Fig. 1).
The transition between the polygraphic screen and shady screen is accomplished as follows (Fig. 2): the area of the screen points of the image shown in Fig. 1 is calcu-lated using the equation F = n d2 where Y denotes the area of the point ~in mm ), d is the mean diameter of the point (in mm). The area F of the point is set equal to the area of a square with side a , wherefrom the side a of the square is obtained, taking into account the equality of the two areas. In fact, a is the length of the base of the platelet, which platelet at a given height would project itself as a shadow of an area adequate to the corresponding point of the image obtained according to the method of polygraphic screen, as it is shown in Fig. 1. The height of the platelet is determined using the equation h= a tg ~, where h denotes the helght of the platelet in mm; a is the side of the square in mm and is equal to the length of the shadow at an angl-e of incldence of the sun~eams ~. With an angle of incidence of the sunbeams as given above and determined using a trigo-nometric dependence, the len~th of the projected shadow is determined at the moment of calculation of the side o~ 20x20mm square and at 7mm height of the edge, thus 7 = 0,3500 -~ = 1919' or, in other words, each screen cell (Fig. l) tu~s into a shady screen cell (Fig. 2) obtained using a platelet of a width B and height h, which are calculated using the approach given here above.
When the sunbeams strike in the direction of arrow D, the platelet AC (Fig. 4) draws a shady screen cell of the first image. The second screen cell is not v:isible because the platelet AB project itself as a thin llne, whose area is negligible in comparison with the area of the shadow thrown by the platelet AC. During the afternoon, when the sunbeams strike in the direction of the arrow L, the shadow thrown by the plateIet AC is in the form of a thin line, which is not visibLe, while the shadow of the platelet AB is of an area
There is known a plastic image pan~l,used for creating shadow images by means of space geometrical forms, which panel produces one image.
The disadvantages of these panels lie in their sta-tic nature, the complexity in -the preparation of space geometrical forms and, most of all, the availability of a single image on one and the same viewing plane.
: An object of the present invention is to provide.a panel for stereoplastic images and a method of making it, providing two images on one and the same viewing plane when using relatively simple platelets instead of space geometrical forms.
As claimed hereinj this object is achieved in a panel capable of producing two stereoplastic images, said panel comprising: a planar support intended to stand upright and image components for shadow images fixed to said support, characterized in that said components:
- are platelets made of rigid non-transparent . material;
- are fixed, by one edge thereof as a base, to said support so as to project perpendicularly from said support;
- are distributed on said suppor-t so as to lie in planes extending in mutually perpendicular directions, each direction making an angle of 45 with the horizontal;
- are, in each plane, different in size and shape, and - are arranged in said planes in predetermined compositions suitable, when hit by light coming from one of 08g said directions, to induce shadows defining on said support one of said images and, when hit by light coming from -the other of said directions, to induce shadows defining on said support the other of said.images, The platelets are preferably L-shaped and are attached with one of their sides to the viewing plane.
The invention, as claimed therein, is also a method of making a panel as claimed in claim 1, comprising: making two images on one single plane from two polygraphic originals;
subjecting said polygraphic originals to screening using a poly-graphic screen producing points; separately calcuIating the areas of said screen points and equating each area to that of a square of which the side has the length of said edge base of said platelets; determining the height of said platelets analyt-ically for a given light angle; arranging said platelets according to said polygraphic originals, in planes making an angle of 90 therebetween, whereby the areas of the shadows made by:the platelets in one of said planes correspond to the areas of the screen points of one of said images, and the areas: of the shadows made by the platelets in the other of said planes ~:~ .correspond to the areas of the screen points of the other of said images.
: : The main advantage~ of the stereoplastic image panels ~: are as follows.
i) The panels carry a double amount of information on one and the same viewing plane;
ii) The images are kinetic in their nature and are var:Lable when the variation of the images is not accomplished by mechani-cal or any other devices, but is a result of the Earth's rota-tion around its axis (in sunshine) or o the movement of the observer (in conditions of diffuse light). During the evening hours of the day, the variation of the images is obtained by ~ ~ .
.J ~ 2 -08~
means of a lighting installation, which is switched-on periodically at the ieft and right side of the decorative panel r respectively;
iii) The stereoplastics make it possible to obtain large-scale images of a high duration.
In-the appended drawings, an embodiment of the inven-tion is shown, wherein:
Fig. 1 is a fragment of an image, accomplished using a polygraphic screen;
Fig. 2 is the fragment of Fig. 1, implemented using : /
/
- 2a -1 16~08~
the method of shady screen;
Fig. 3 is the direction of orientation oE the decorative panel;
Fig. 4 illustrates the principle involved in the making of the stereoplastic image;
Fig. S illustrates the analytical solution for the determination of the heights of the platelets;
Figs. 6a and 6b are implementations of the stereo-plastic image.
Two ~iack and white graphics or two non-colour photographies, submitted to screening using a polygraphic screen, serve as an original Eor the making of two images on one and the same plane (see Fig. 1).
The transition between the polygraphic screen and shady screen is accomplished as follows (Fig. 2): the area of the screen points of the image shown in Fig. 1 is calcu-lated using the equation F = n d2 where Y denotes the area of the point ~in mm ), d is the mean diameter of the point (in mm). The area F of the point is set equal to the area of a square with side a , wherefrom the side a of the square is obtained, taking into account the equality of the two areas. In fact, a is the length of the base of the platelet, which platelet at a given height would project itself as a shadow of an area adequate to the corresponding point of the image obtained according to the method of polygraphic screen, as it is shown in Fig. 1. The height of the platelet is determined using the equation h= a tg ~, where h denotes the helght of the platelet in mm; a is the side of the square in mm and is equal to the length of the shadow at an angl-e of incldence of the sun~eams ~. With an angle of incidence of the sunbeams as given above and determined using a trigo-nometric dependence, the len~th of the projected shadow is determined at the moment of calculation of the side o~ 20x20mm square and at 7mm height of the edge, thus 7 = 0,3500 -~ = 1919' or, in other words, each screen cell (Fig. l) tu~s into a shady screen cell (Fig. 2) obtained using a platelet of a width B and height h, which are calculated using the approach given here above.
When the sunbeams strike in the direction of arrow D, the platelet AC (Fig. 4) draws a shady screen cell of the first image. The second screen cell is not v:isible because the platelet AB project itself as a thin llne, whose area is negligible in comparison with the area of the shadow thrown by the platelet AC. During the afternoon, when the sunbeams strike in the direction of the arrow L, the shadow thrown by the plateIet AC is in the form of a thin line, which is not visibLe, while the shadow of the platelet AB is of an area
2~0 corresponding to the screen cell of the second image.
As it will be~seen from Fig. 1, in polygraphic screening, the images are obtained as points and their mean diameters can be determined by measurement. On this basis, the~analytical dependences are deduced, which enable, when originating only from the mean diameter of the screen points :~: :
of the two screen polygraphic images, both the hei~ht h and w1dth B of the platelets, which draw in a screen manner the images on one and the same plane of the field o vision, to be determined hl n 1 mm; B = 09 d mm; h = n d mm; B = 09 d mm ~ 4 ~
-8 ~
where hl, Bl are the height and width, respecti~ely/ of the ,platelet used for creating the second image.
h2,B2 are the height and width, respectively, of the pLatelet used forcreatip,g the second image.
:: :
:~ , :
. ~ 5 -
As it will be~seen from Fig. 1, in polygraphic screening, the images are obtained as points and their mean diameters can be determined by measurement. On this basis, the~analytical dependences are deduced, which enable, when originating only from the mean diameter of the screen points :~: :
of the two screen polygraphic images, both the hei~ht h and w1dth B of the platelets, which draw in a screen manner the images on one and the same plane of the field o vision, to be determined hl n 1 mm; B = 09 d mm; h = n d mm; B = 09 d mm ~ 4 ~
-8 ~
where hl, Bl are the height and width, respecti~ely/ of the ,platelet used for creating the second image.
h2,B2 are the height and width, respectively, of the pLatelet used forcreatip,g the second image.
:: :
:~ , :
. ~ 5 -
Claims (6)
1. A panel capable of producing two stereoplastic images, said panel comprising: a planar support intended to stand upright and image components for shadow images fixed to said support, characterized in that said components:
- are platelets made of rigid non-transparent material;
- are fixed, by one edge thereof as a base, to said support so as to project perpendicularly from said support;
- are distributed on said support so as to lie in planes extending in mutually perpendicular directions, each direction making an angle of 45° with the horizontal;
- are, in each plane, different in size and shape, and - are arranged in said planes in predetermined compositions suitable, when hit by light coming from one of said directions, to induce shadows defining on said support one of said images and, when hit by light coming from the other of said directions, to induce shadows defining on said support the other of said images.
- are platelets made of rigid non-transparent material;
- are fixed, by one edge thereof as a base, to said support so as to project perpendicularly from said support;
- are distributed on said support so as to lie in planes extending in mutually perpendicular directions, each direction making an angle of 45° with the horizontal;
- are, in each plane, different in size and shape, and - are arranged in said planes in predetermined compositions suitable, when hit by light coming from one of said directions, to induce shadows defining on said support one of said images and, when hit by light coming from the other of said directions, to induce shadows defining on said support the other of said images.
2. A panel as claimed in claim 1, wherein said platelets are L-shaped with one leg thereof secured to said planar support.
3. A method of making a panel as claimed in claim 1, comprising: making two images on one single plane from two polygraphic originals; subjecting said polygraphic originals to screening using a polygraphic screen producing points;
separately calculating the areas of said screen points and equating each area to that of a square of which the side has the length of said edge base of said platelets; determining the height of said platelets analytically for a given light angle; arranging said platelets according to said polygraphic originals, in planes making an angle of 90° therebetween, whereby the areas of the shadows made by the platelets in one of said planes correspond to the areas of the screen points of one of said images, and the areas of the shadows made by the platelets in the other of said planes correspond to the areas of the screen points of the other of said images.
separately calculating the areas of said screen points and equating each area to that of a square of which the side has the length of said edge base of said platelets; determining the height of said platelets analytically for a given light angle; arranging said platelets according to said polygraphic originals, in planes making an angle of 90° therebetween, whereby the areas of the shadows made by the platelets in one of said planes correspond to the areas of the screen points of one of said images, and the areas of the shadows made by the platelets in the other of said planes correspond to the areas of the screen points of the other of said images.
4. A method according to claim 3, wherein said given angle is between 20 and 25°.
5. A method according to claims 3 or 4, wherein said polygraphic originals are draw graphics.
6. A method according to claims 3 or 4, wherein said polygraphic originals are non-colour photographies.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000385418A CA1162089A (en) | 1981-09-08 | 1981-09-08 | Stereoscopic image and method of its realization |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000385418A CA1162089A (en) | 1981-09-08 | 1981-09-08 | Stereoscopic image and method of its realization |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1162089A true CA1162089A (en) | 1984-02-14 |
Family
ID=4120899
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000385418A Expired CA1162089A (en) | 1981-09-08 | 1981-09-08 | Stereoscopic image and method of its realization |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1162089A (en) |
-
1981
- 1981-09-08 CA CA000385418A patent/CA1162089A/en not_active Expired
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry | ||
| MKEX | Expiry |
Effective date: 20010214 |