JPH0618997A - Method and device for printing 3d stereoscopic photograph - Google Patents

Abstract

PURPOSE:To produce a stereoscopic photograph excellent in photographic property by incroporating a negative monitoring device so that the difference of the parallax between a foreground object, a background object and a main object is taken into consideration. CONSTITUTION:The negative monitoring device consisting of a CCD camera and a line sensor is incorporated in a 3D stereoscopic photograph printing device, and the deviation of a key subject on the main object of each negative is measured. For example, in the case three frames of negative are arranged at the pitch of 18.5mm, a specified value is set within an allowable range which is the deviation >=18.5+ or -1mm or the deviation <=+ or -0.3mm. In the case of 0.3mm<= ¦(distance in a horizontal direction between the key subject on a reference image frame and the key subject on a comparison image frame)-18.5 ¦ <=1mm, correction is not performed but exposure is performed by aligning the key subjects. When the above absolute value is >1mm, the adjustment of pictures is performed by considering that the expression in parentheses shows 19mm, and when the absolute value is <0.3mm, the adjustment pictures is performed by considering that it is 18.8mm.

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 Conventionally, as a general method for creating a 3D stereoscopic photograph, a plurality of frames of negatives are photographed with a camera having three or more eyes for a deep object 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.

FIG. 1 shows an explanatory view of a method of taking a 3D stereoscopic photograph. The figure shows an example in which a three-lens camera using lenses 11, 12, and 13 is used, and the arrows indicated by L and L'are the distances between viewpoints, and X and Y are the main subject 5 and the background object 4, respectively.
The parallax between the main subject 5 and the foreground object 6 is shown.

Depending on the shooting location, for example, the main subject 5
And the background object 4 are compared, there is a parallax of −X on the first screen, 0 on the second screen, and + X on the third screen. When comparing the main subject and the foreground object, + Y, 2
There is a parallax of 0 on the screen and -Y on the third screen. In this way, a negative in which the positions of the main object, the foreground, and the background image differ depending on the shooting location is created.

The negative obtained by photographing is a photosensitive sheet with a lenticular sheet in which a photosensitizer is applied to the back surface of a sheet which plays a role of a lenticular lens, and from the lenticular lens side, from one frame to the other frame in the order of photographing positions. It is printed one after another.

In printing, a part of the main object is designated as a key subject, and the exposure is performed by aligning the key subjects in the projected images of the respective negatives so that they match each other. When printing is performed by changing the projection angle for each negative, the image of each negative is divided into image bands of a band pattern by the lenticular lens, and image bands of widths corresponding to the projection angle are repeatedly arranged at positions corresponding to the projection direction. It is formed.

FIG. 2 illustrates the formation of a three-dimensional image of a 3D three-dimensional photograph in which three negatives photographed by a three-lens camera are printed once each. As shown in the figure, the image band formed on the photosensitive layer is laterally magnified by the lenticular lens and appears as a restored image, and the right eye and the left eye receive different restored images of the two image bands corresponding to different photographing points. It is considered that an observer can obtain stereoscopic vision by combining different image information of the right eye and the left eye.

Stereoscopic vision changes due to the difference in image information on the screens given to the right and left eyes. The larger the difference in spatial parallax between the images entering the left and right eyes is, the more the stereoscopic effect is improved, but the large difference in image information is perceived as out-of-focus or illusion.

Then, the printing apparatus is set, and the image bands sent to the right eye and the left eye are usually exposed with a band width and a band pattern of a photographing angle so as to be a combination of adjacent negatives having the smallest distance between the viewpoints. . Further, a part of the main subject, which is more important than the background object and the foreground object, is designated as a key subject, and exposure is performed so that the key subject of each negative frame matches.

[0010]

However, the positional relationship among the foreground object, the main subject, and the background object differs depending on the object to be photographed, and the parallax between the main subject and the foreground object or the background object is not constant.

For example, when a composition in which the main subject is arranged in the near view is photographed, the parallax between the main subject and the foreground object is small, but the parallax between the main subject and the background object is extremely large. In a conventional 3D stereoscopic printing device, a part of such a main subject is designated as a key subject,
Since the exposure is performed so that the key subjects always match, the parallax of the background object becomes too large, causing defocus in the distant view.

On the contrary, when a composition in which the main subject is arranged in the distant view is photographed, the parallax between the main subject and the background object is small, but the parallax between the main subject and the foreground object is extremely large. If a part of such a main subject is designated as a key subject and exposure is performed so that the key subjects always match, the parallax of the foreground object becomes too large, causing defocus in the near view.

When the parallax becomes extremely large as described above, even when the produced stereoscopic photograph is observed, only the vicinity of the key subject of the main subject can be clearly recognized, and the overall photographic quality and stereoscopic effect are impaired. It is an object of the present invention to obtain a 3D stereoscopic printing device that takes into consideration the difference in parallax between a foreground object and a background object and a main subject, and provide a stereoscopic image with excellent photographic properties.

[0014]

In order to solve the above problems, in the present invention, a 3D stereoscopic printing apparatus is incorporated with a negative monitoring device including a CCD camera and a line sensor.
Measure the shift amount of the key subject on the main subject of each negative. When the shift amount of the key subject on the main subject is larger than the threshold value, it is determined that the main subject is in the near view, correction is performed so as to suppress the parallax of the background object, and exposure is performed with alignment.

On the contrary, when the shift amount of the key subject on the main subject is smaller than the threshold value, it is judged that the main subject is in the distant view, the parallax of the foreground object is corrected, the position is adjusted and the exposure is performed. To do. Even when a main subject such as a landscape photograph cannot be specified, the amount of deviation is measured and corrected using an arbitrary position as a key point.

3 and 4 are flow charts of a program for monitoring the negative and controlling the exposure position in the 3D stereoscopic printing apparatus of the present invention. The symbol S in the figure indicates that the flowcharts are connected.

In the initial setting, the threshold value of the shift amount and the coordinate origin are set, the key sub position of the reference screen is designated, and the image data at the coordinate and the key sub position is fetched. The image at the key sub position is searched from the comparison screen, and the key sub coordinates of the comparison screen are measured. The deviation amount is calculated by comparing the coordinates of the key subs on the reference screen and the comparison screen, and when the deviation exceeds the threshold value, an equal correction amount is given to each deviation amount and the exposure position is recalculated. According to the corrected exposure position, the lens, the negative, the exposure table, etc. are moved to perform proper exposure.

An example of a method of calculating the correction amount used in the 3D stereoscopic printing apparatus of the present invention will be described. When the negatives of three frames are arranged at a pitch of 18.5 mm, the specified value is 18.5, and the deviation amount of ± 1 mm or more or the deviation amount of ± 0.3 mm or less is set as the allowable range. 0.3 mm ≦ | (horizontal distance between key subs on the reference screen and key subs on the comparison screen) −18.5 | ≦ 1 mm, it is determined that the deviation amount is appropriate, and the key sub is not corrected. It is also exposed.

[(Horizontal distance between key sub on reference screen and key sub on comparison screen) -18.5 |> 1 mm, horizontal distance between key sub on reference screen and key sub on comparison screen] Picture matching is performed assuming that the distance is 19 mm. | (Horizontal distance between key sub on standard screen-key sub on comparison screen) -18.5 | <0.3 mm
In this case, it is assumed that the horizontal distance between the key sub on the reference screen and the key sub on the comparison screen is 18.8 mm, and picture matching is performed.

An example of printing with the 3D stereoscopic printing apparatus of the present invention will be described. As shown in FIG. 5, when the main subject 15 is in an extremely close view, the position of the key sub on each screen changes significantly, and the amount of deviation increases.

At this time, as shown in FIG. 6, the pitch of each negative frame is 18.5 mm, but the key sub of the comparison screen has a threshold value of 17.5 which is input by default with respect to the key sub of the reference screen. Below (i.e., | 17.5-18.
5 |> 1 mm) or more than 19.5 (that is, | 1
(9.5-18.5 |> 1 mm), it is determined that correction is necessary.

When printing is performed by the conventional 3D stereoscopic printing apparatus, the spatial parallax of the background becomes large as shown in FIG. 7, causing defocusing. When printing is performed by the 3D stereoscopic printing apparatus of the present invention, it is possible to prevent the overall spatial parallax from becoming extremely large as shown in FIG.
The photographic quality is improved.

As shown in FIG. 9, when the main subject 15 is in an extremely distant view, the position of the key sub on each screen does not change, and there is almost no deviation. As shown in FIG. 10, although the pitch of each negative frame is 18.5 cm, the position of the key sub on the comparison screen relative to the key sub on the reference screen is 18.2 to 18.8 (| 18). .2-18.5 | <0.
Since it remains within the range of 3 mm to | 18.8-18.5 | <0.3 mm, it is determined that the correction is necessary.

When printing is performed by a conventional 3D stereoscopic printing apparatus, the spatial parallax of the foreground becomes large as shown in FIG. 11, and defocusing occurs. When printing is performed by the 3D stereoscopic printing apparatus of the present invention, it is possible to prevent the entire spatial parallax from becoming extremely large as shown in FIG. 12, so that the photographic property is improved.

Further, when the main subject cannot be specified such as a landscape photograph as shown in FIG. 13, the shift amount is measured with an arbitrary position as a key sub. In general, it is advisable to take a key sub on the foreground subject of all subjects. Further, the key subject position may be set in advance. In this case, it is advisable to take a key sub near the center of the screen.

[0026]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a 3D stereoscopic printing apparatus of the present invention will be described with reference to the drawings. As shown in FIG. 14, the negative 2 inserted in the negative mask 1 is imaged by a CCD camera, and as shown in FIG. 15, the central frame among the three negatives is displayed on the television monitor 5 as a reference screen. In this embodiment, the television monitor 5 is connected to the image processing section and the CPU, and the trackball 4 is used to specify with the cursor 3.

When the main subject can be specified, the key subject 6 on the screen is designated by the cursor 3. The image processing unit takes in the coordinates of the specified key subject and the image, and the CCD camera, based on the taken image information,
Scan and detect the key subject on the comparison screen.

As shown by arrows A and B in FIG. 16, the distance between the key subject on the comparison screen and the key subject on the reference screen is obtained, and the correction amount is determined with reference to the set threshold value.

[0029]

According to the 3D stereoscopic printing apparatus of the present invention, the spatial parallax of the distant view or the near view, which occurs when the main subject is arranged at a position close to the near view or the distant view, is suppressed to an appropriate value. It is possible to make few photographs. Although there has been a tendency that the object of taking a 3D stereoscopic photograph is limited to a certain composition, the 3D stereoscopic image printing apparatus of the present invention allows the main subject, the background object, and the foreground object to be placed in any position
A landscape photograph or the like is also effective in that a good three-dimensional photograph can be produced.

[Brief description of drawings]

FIG. 1 is an explanatory diagram of a 3D stereoscopic photography method.

FIG. 2 is an explanatory diagram of formation of a stereoscopic image of a 3D stereoscopic photograph taken by a trinocular camera.

FIG. 3 is a flowchart of a program for controlling the 3D stereoscopic printing apparatus of the present invention.

FIG. 4 is a flow chart of a program for controlling the 3D stereoscopic printing apparatus of the present invention.

FIG. 5 is an explanatory diagram of an example of printing with the 3D stereoscopic printing apparatus of the present invention.

FIG. 6 is an explanatory diagram of an example of printing with the 3D stereoscopic printing apparatus of the present invention.

FIG. 7 is an explanatory diagram of an example of printing with the 3D stereoscopic printing apparatus of the present invention.

FIG. 8 is an explanatory diagram of an example of printing with the 3D stereoscopic printing apparatus of the present invention.

FIG. 9 is an explanatory diagram of an example of printing with the 3D stereoscopic printing apparatus of the present invention.

FIG. 10 is an explanatory diagram of an example of printing with the 3D stereoscopic printing apparatus of the present invention.

FIG. 11 is an explanatory view of an example of printing with the 3D stereoscopic printing apparatus of the present invention.

FIG. 12 is an explanatory diagram of an example of printing with the 3D stereoscopic printing apparatus of the present invention.

FIG. 13 is an explanatory diagram of an example of printing with the 3D stereoscopic printing apparatus of the present invention.

FIG. 14 is an explanatory diagram showing an example of the 3D stereoscopic printing apparatus of the present invention.

FIG. 15 is an explanatory view showing an embodiment of the 3D stereoscopic printing apparatus of the present invention.

FIG. 16 is an explanatory diagram showing an example of the 3D stereoscopic printing apparatus of the present invention.

[Explanation of symbols]

 1 Negative mask 2 Negative 3 Cursor 4 Trackball 5 TV monitor 6 Key subject 10 Screen 11 Lens 12 Lens 13 Lens 14 Camera 15 Main subject 20 Screen 30 Screen

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Hajiro Meiraku 579-1 Umehara, Wakayama, Wakayama Noritsu Koki Co., Ltd.

Claims (2)

[Claims] 1. A method for printing a 3D three-dimensional photograph using a lenticular sheet, wherein one 3D image is recorded by a negative monitoring device.
The shift amount of the key subject on the main subject is measured between a plurality of negatives which are materials for forming a three-dimensional photograph, and when the shift amount of the key subject on the main subject is larger than a threshold value, the main subject is in the near view. If the amount of shift of the key subject on the main subject is smaller than the threshold, it is determined that the main subject is in the distant view and the parallax of the foreground object is reduced. A method for printing a 3D stereoscopic photograph, which comprises correcting and exposing. 2. In a 3D stereoscopic printing apparatus using a lenticular sheet, a negative monitoring means for measuring a shift amount of a key subject on a main subject of each negative, and a shift amount of the key subject on the main subject and a threshold value. A 3D stereoscopic printing apparatus comprising: a comparing means; and a correcting means for suppressing a parallax of a background object or a near view object according to a result from the comparing means.