JP2689825B2 - Method and apparatus for printing 3D stereoscopic photograph - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and apparatus for printing 3D stereoscopic photographs.

[0002]

2. Description of the Related Art As a general method for creating a 3D stereoscopic photograph, a plurality of negatives are photographed by using a camera with three or more eyes for a subject having a depth composed of a main object, a foreground and a background. In addition, an indirect method is used in which the projection angle is changed for each negative, and the photosensitive sheet with the lenticular sheet is overprinted three times or more.

Each negative is an image of the subject taken from a shooting point located on a line parallel to the subject or on a curve drawn in the center of the subject. A negative in which the positions of the main object, the foreground, and the background image differ depending on the shooting location is created.

A negative is projected from the lenticular lens side onto a photosensitive sheet with a lenticular sheet on the back surface of which serves as a lenticular lens, and the negative is sequentially printed from one frame to the other frame in the order of photographing positions. I do.

When the projection angle is changed for each negative and printing is performed,
The image of each negative is divided into image bands of a band pattern by a lenticular lens, and image bands having a width corresponding to the projection angle are repeatedly arranged at positions corresponding to the projection direction.

[0006] Taking as an example a 3D three-dimensional photograph in which a negative of three frames photographed by a three-lens camera for 3D three-dimensional photograph is printed once,
The formation of a stereoscopic image will be described. FIG. 2 is an explanatory diagram of a conventional 3D stereoscopic photograph.

As shown in the figure, the image band formed on the photosensitive layer appears as an image which is laterally enlarged and restored by the lenticular lens, and the two image bands corresponding to different photographing points are separately restored for the right eye and the left eye. The image arrives. In 3D stereoscopic photography, different image information from the right eye and the left eye is combined by an observer to obtain stereoscopic vision.

In the figure, the right eye has a central image band,
The image band on the right arrives at the left eye. The image band of 9 ° covers the field of view of 9 ° and the image band of 7 ° covers the field of view of 7 °, respectively, and a stereoscopic view can be obtained in the observation range of 23 ° in front of the 3D stereoscopic photograph.

The stereoscopic effect changes depending on which shooting point the negative restored image is given to the right eye and the left eye. When the distance between shooting points is long, that is, when two image bands with a large distance between the viewpoints are combined, the stereoscopic effect is improved, but the spatial parallax of the images entering the left and right eyes becomes large,
A large difference between the image information of the right eye and the image information of the left eye is perceived as out-of-focus or illusion, which deteriorates the quality of the photograph.

Therefore, by setting a printing device, the projection angles are usually fixed so that the image bands sent to the right eye and the left eye are the combination of the adjacent negatives with the smallest distance between the viewpoints, and the band width and band pattern. Have been exposed in.

Further, when four or more negatives are prepared with a large number of photographing points and four or more image bands are burned, the viewing angle covered by one image band becomes small as shown in FIG. Depending on the position, an image band in which the right eye and the left eye are not adjacent to each other may be caught, resulting in defocusing or illusion.

[0012]

Unlike ordinary photographs, 3D stereoscopic photographs are required to have a stereoscopic effect more than photographic characteristics such as color, contrast and sharpness. To get a stereoscopic effect, it is sufficient to increase the distance between the viewpoints, but when an image with a large distance between the viewpoints is in each eye, defocus and illusions are likely to occur.

Therefore, in the conventional printing apparatus for 3D stereoscopic photography, the image band is always formed so that the combination of the negatives having the smallest distance between the viewpoints for observation is in the left and right eyes of the observer.

However, a multi-view 3D having a fixed lens interval
If a person with a small stereoscopic camera, who does not have special technology, shoots, it may not always be possible to shoot with a composition that gives an appropriate depth feeling in the near view and the distant view, and the composition will have poor perspective. There is also.

When the spatial parallax is small as in such a composition with a poor sense of perspective, a sufficient stereoscopic effect cannot be obtained from a 3D stereoscopic photograph produced by a normal printing method. It is an object of the present invention to obtain a method for printing a 3D stereoscopic photograph having a desired spatial parallax, and to provide a stereoscopic photograph having an excellent stereoscopic effect.

[0016]

In order to solve the above-mentioned problems, the present invention measures the spatial parallax of each frame screen of a negative forming a 3D stereoscopic photograph to measure the foreground object due to the change of the parallax depending on the photographing point. The depth of the subject and the background object is grasped, and according to the result, an image band having a band width and a band pattern is formed so that an optimal stereoscopic vision can be obtained by a combination of negatives having different distances between viewpoints.

In order to grasp the spatial parallax, a negative monitoring device composed of a CCD camera and a line sensor is incorporated in the printing apparatus, each screen of the negative is taken in, and the parallax is measured by designating the coordinate position on the TV monitor.

When the change in the parallax depending on the photographing point is small, the exposure pattern is formed so as to form an image band of a band width and a band pattern so that stereoscopic vision can be obtained by a combination of negatives having a large distance between viewpoints.

When the change in parallax is sufficient, exposure is performed with a normal band width and band pattern that can be observed with a combination of negatives with small distances between viewpoints obtained at adjacent photographing points.

FIG. 4 is an explanatory diagram of parallax of 3D stereoscopic photographs and distance between perspectives. The figure shows 3 with lenses 1, 2, 3
The case where an eye camera is used is taken as an example. L, L'in the figure
The arrow pointed to indicates the distance between viewpoints, and X and Y indicate the parallax between the main subject 5 and the background object 4, and the main subject 5 and the foreground object 6, respectively.

The change in parallax at each photographing point is, for example, -X on the first screen, 0 on the second screen, and + X on the third screen when comparing the parallax between the main subject 5 and the background object 4. The change in parallax is -X. Comparing the parallax between the main subject and the foreground object, + Y on the first screen, 0 on the second screen, -Y on the third screen, and the change in parallax is + Y.

In the figure, since the main subject 5, the foreground object 6 and the background object 4 are points, there is only one position where parallax is obtained, but the parallax is based on an arbitrary position such as the center of the object or the maximum parallax point. Changes can also be measured.

Alternatively, one point of the main subject, foreground, background, or the like, for example, the main subject key subject point may be used as a reference point, and the change in the relative position of that point on each screen may be measured.

FIG. 5 and FIG. 6 show flow charts for explaining a program installed in the printing apparatus for 3D stereoscopic photographs of the present invention. The symbol S in the figure connects the flowcharts of FIGS. 5 and 6. In this example, the parallax is grasped with reference to one point on the main subject.

After initializing the positions of the CCD camera and the exposure table as shown in the figure, one negative image serving as a reference screen is photographed and the coordinates of the reference point are stored. Next, the remaining negative images are photographed as a comparison screen, and the coordinates of the reference points on each negative image are also stored. If the amount of displacement of the reference point is calculated from the coordinates, and if the preset threshold value is exceeded, it is determined that the distance between the viewpoints of the adjacent negatives is large and the spatial parallax is sufficient, and the adjacent shooting points. Printing is performed with an exposure pattern that gives a stereoscopic effect by combining the negatives of.

When the calculated positional deviation amount of the reference point is less than the threshold value, it is determined that the distance between the viewpoints of adjacent negatives is small and the spatial parallax is insufficient. In order to increase the spatial parallax, printing is performed with an exposure pattern that gives a stereoscopic effect by combining the negatives of the shooting points that are located side by side, and a photograph with a good stereoscopic effect is obtained.

FIG. 7 shows a schematic view for explaining an example of a printing apparatus for 3D stereoscopic photographs according to the present invention. The apparatus is generally composed of a light source, a lens, an exposure unit including an exposure table and its driving device, an image processing unit having image pickup, processing, and display functions, a CPU, and an R.
The control computer is composed of an OM and a RAM, and there are other circuits for input / output, I / O, and the like.

The negative 53 is picked up by the CCD camera 11 and displayed on the monitor television 13 through the image processor 12. Further, the position on the TV screen can be designated by moving the cursor on the monitor TV with the trackball 14. The image processing unit 12 sends the coordinate value designated by the cursor to the connected computer, calculates the screen shift of each negative frame, and determines the spatial parallax.

In the example shown in this figure, the exposure lens 54
The CCD camera 11 and the CCD camera 11 are on the same plate, and two lens / camera moving motors 31 and 32 are installed on the plate so that they can be moved in two vertical directions. The exposure table 55 is also movable, and the exposure table moving motor 33 is installed. Both the lens / camera moving motors 31 and 32 and the exposure table moving motor 33 are drive circuits 41 and 42, respectively.
It is connected to the control computer including the CPU 25, the ROM 26, and the RAM 27 via the. Also, a keyboard 23 and a display 2 for operating the computer
4 is the I / O port 3 like the drive circuits 41 and 42
It is connected to the computer via 1, 32.

When the apparatus of the present invention images each negative frame, calculates the coordinate change amount of the reference point on the television screen designated by the cursor, and determines that the change in parallax is small, the distance between viewpoints is large. The projection angle of the negative and the band pattern to be burned are changed so that a stereoscopic view can be obtained by combining the negatives.

For example, when making a 3D stereoscopic image in which a negative of three frames with small changes in parallax of each frame is projected three times, printing is performed with an exposure pattern that allows a large band width with the image bands at both ends.

FIG. 1 shows an explanatory view of an example of a photograph printed by the printing apparatus for 3D stereoscopic photographs of the present invention. As shown in the figure, the image bands at both ends cover a large viewing angle, so when viewed from the front, a restored image is obtained that is due to the combination of negatives with a large distance between the viewpoints,
Get good stereoscopic pictures.

As another example, as shown in FIG. 7 described above, in producing a 3D stereoscopic photograph in which a negative of 4 frames is projected 6 times to form 6 image bands, the spatial parallax of each frame is Is appropriate, but when the image bands that are not adjacent to each other by the normal printing method reach both eyes and become out of focus, the exposure pattern is changed to perform exposure.

FIG. 8 is an explanatory view of another example of a photograph printed by the printing apparatus for 3D stereoscopic photographs of the present invention. As the band pattern changes as shown in the figure, a restored image with the image band reaches both eyes of the observer, and a good stereoscopic photograph is obtained.

[0035]

As described above, according to the printing apparatus for 3D stereoscopic photography of the present invention, it is suitable by changing the exposure pattern of the image band width and band pattern which differs depending on the parallax of the screen at each photographing point. It is possible to make a photograph in which a restored image having a large spatial parallax reaches the left and right eyes of the observer.

Defocusing due to too large spatial parallax is eliminated, and the lack of depth in the near view and the distant view can be compensated for, and the stereoscopic effect can be adjusted. Further, the printing apparatus of the present invention has an effect of producing a stereoscopic sensitized photograph in which stereoscopic effect is emphasized.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram showing an example of printing a 3D stereoscopic photograph of the present invention.

FIG. 2 is an explanatory diagram of a photograph printed by a conventional 3D stereoscopic photograph printing method.

FIG. 3 is an explanatory diagram of a photograph printed by a conventional 3D stereoscopic photograph printing method.

FIG. 4 is an explanatory diagram of an example of a photograph printed by the printing apparatus for 3D stereoscopic photographs of the present invention.

FIG. 5 is a flowchart illustrating a program installed in a printing apparatus for 3D stereoscopic photography according to the present invention.

FIG. 6 is a flowchart illustrating a program installed in the printing apparatus for 3D stereoscopic photography according to the present invention.

FIG. 7 is a schematic diagram illustrating an example of a printing apparatus for 3D stereoscopic photography according to the present invention.

FIG. 8: Printing is performed by the printing apparatus for 3D stereoscopic photography of the present invention.
It is explanatory drawing of another example of the taken photograph.

[Explanation of symbols]

 1 lens 2 lens 3 lens 4 background object 5 main subject 6 foreground object 10 screen 11 CCD monitor 12 image processing unit 13 monitor TV 14 trackball 20 screen 21 I / O port 22 I / O port 23 display 24 keyboard 25 CPU 26 ROM 27 RAM 30 screen 31 camera / lens moving motor 32 camera / lens moving motor 33 exposure table moving motor 41 drive circuit 42 drive circuit 50 light source 51 light control filter 52 mirror tunnel 53 negative 54 exposure lens 55 exposure table

Front page continuation (72) Inventor Kazuki Yamamoto, Noritsu Koki Co., Ltd. 579-1 Umehara, Wakayama, Wakayama Prefecture (72) Inventor Hajime Meiraku, 579-1, Umehara, Wakayama City, Wakayama Noritsu Koki Co., Ltd. ( 56) References JP-A-3-185438 (JP, A) JP-A-5-210181 (JP, A) JP-B-45-32039 (JP, B1)

Claims (2)

(57) [Claims] 1. A method of projecting and printing a set of negatives taken for stereoscopic photography as a pattern of an image band on a lenticular sheet-sensitive material, and measuring the parallax of the set of negatives to obtain the value of the parallax. If the value is smaller than a specific value, the observer can see an image of a combination in which the distance between the observation points is not the minimum, and if the value of the parallax is larger than a specific value, the observer can see an image of the combination in which the distance between the observation points is minimum. , A method for printing a three-dimensional photograph, characterized in that an image from each negative is printed as a pattern of an image band. 2. A device for projecting and printing a set of negatives taken for stereoscopic photography as a pattern of an image band on a lenticular sheet-sensitive material, a video camera for taking the set of negatives, and the video camera. A means for measuring the disparity between the negatives based on the captured image, a means for selecting the pattern of the image band of the image from each negative based on the disparity between the negatives Printing device.