JP2725533B2 - 3D stereographic printing method and apparatus - 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 an 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 a negative object are photographed using a camera of three or more eyes with respect to a deep object composed of a main object, a foreground, a background, and the like. In addition, an indirect method has been performed in which the projection angle is changed for each negative and the image is superimposed and printed three or more times on a photosensitive sheet with a lenticular sheet.

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

[0004] For example, the main subject 5
Compared with the background object 4, there is a parallax of -X on the first screen, 0 on the second screen, and + X on the third screen. When the main subject and the foreground object are compared, on the first screen, + Y, second
There is a parallax of 0 on the screen and -Y on the third screen. In this manner, a negative in which the positions of the main object, the foreground, and the background are different depending on the shooting location is created.

[0005] The negative obtained by the photographing is transferred from a lenticular lens side to a photosensitive sheet with a lenticular sheet coated with a photosensitive agent on the back surface of the sheet serving as a lenticular lens, from a frame at one end to a frame at the other end in the order of photographing points. It is printed one after another.

In printing, a part of a main object is designated as a key subject, and the exposure is performed by aligning the key subjects in the projection images of the respective negatives so as to match. When the image is printed with different projection angles for each negative, the image of each negative is divided into image bands of a band pattern by a lenticular lens, and image bands of a width 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 stereoscopic image of a 3D stereoscopic photograph in which three negatives shot by a three-lens camera are printed once each. As shown in the figure, the image band formed on the photosensitive layer is expanded in the horizontal direction by the lenticular lens and appears as a restored image, and separate restored images of two image bands corresponding to different photographing points reach the right and left eyes. It is considered that the observer can obtain stereoscopic vision by combining different image information of the right eye and the left eye.

[0008] Stereoscopic vision changes due to the difference in image information of the screen given to the right and left eyes. As the difference between the spatial parallaxes of the images entering the left and right eyes increases, the stereoscopic effect improves, but a large difference in the image information is recognized as out-of-focus or an illusion.

Therefore, a printing apparatus is set up, 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 form a combination of adjacent negatives having the smallest distance between the viewpoints. . Further, a part of a main subject that 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 between 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 photographing a composition in which a main subject is arranged in the foreground, the parallax between the main subject and the foreground object is small, but the parallax between the main subject and the background object becomes extremely large. In a conventional 3D stereographic 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, and the distant view is out of focus.

Conversely, when photographing a composition in which the main subject is arranged in a distant view, the parallax between the main subject and the background object is extremely large, while the parallax between the main subject and the background object is small. 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, and the foreground blurs.

When the parallax becomes extremely large as described above, even when observing the produced three-dimensional photograph, only the vicinity of the key subject of the main subject can be clearly grasped, and the overall photographic properties and three-dimensional appearance are impaired. SUMMARY OF THE INVENTION It is an object of the present invention to provide a 3D stereoscopic photograph printing apparatus in which a difference in parallax between a foreground object, a background object, and a main subject is taken into consideration, and to provide a stereoscopic photograph having excellent photographic properties.

[0014]

In order to solve the above-mentioned problems, according to the present invention, a negative monitoring device including a CCD camera and a line sensor is incorporated in a 3D stereographic printing apparatus.
The shift amount of the key subject on the main subject of each negative is measured. If 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 foreground, and correction is performed so as to suppress the parallax of the background object, alignment is performed, and exposure is performed.

Conversely, if the deviation of the key subject on the main subject is smaller than the threshold value, it is determined that the main subject is in a distant view, and correction is made so as to suppress the parallax of the foreground object. I do. Even when a main subject such as a landscape photograph cannot be specified, the shift amount is measured using an arbitrary position as a key point, and correction is performed.

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

In the initial setting, a threshold value of a shift amount, a coordinate origin, and the like are set, a key sub-position on the reference screen is designated, and image data at the coordinates and the key sub-position is fetched. The image at the key sub position is searched from the comparison screen, and the coordinates of the key sub on the comparison screen are measured. The shift amount is calculated by comparing the coordinates of the key subs on the reference screen and the comparison screen. If the shift amount exceeds the threshold value, an equal correction amount is given to each shift amount, and the exposure position is calculated again. In accordance with the corrected exposure position, the lens, the negative, the exposure table or the like moves, and the exposure is properly performed.

An example of a method of calculating a correction amount used in the 3D stereographic printing apparatus of the present invention will be described. When three negatives 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 regarded as an allowable range. When 0.3 mm ≦ | (key sub-sub on the reference screen−horizontal distance between key subs on the comparison screen) −18.5 | ≦ 1 mm, it is determined that the shift amount is appropriate, and no correction is performed. Exposure together.

| (Horizontal distance between key sub on reference screen-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. | (Key sub on the reference screen-horizontal distance between key subs on the comparison screen) -18.5 | <0.3 mm
In the case of, picture matching is performed on the assumption that the horizontal distance between the key sub on the reference screen and the key sub on the comparison screen is 18.8 mm.

An example of printing with the 3D stereographic 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 greatly, and the shift amount increases.

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

When printing is performed with a conventional 3D stereographic printing apparatus, the spatial parallax of the background becomes large as shown in FIG. When printing is performed by the 3D stereographic printing apparatus of the present invention, the entire spatial parallax can be suppressed from becoming extremely large as shown in FIG.
The photographic properties are improved.

When the main subject 15 is in an extremely distant view as shown in FIG. 9, the position of the key sub on each screen does not change and there is almost no shift. 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 is different from the key sub on the reference screen by the threshold value of 18.2-18.8 (| 18). .2-18.5 | <0.
3 mm or | 18.8-18.5 | <0.3 mm, it is determined that correction is necessary.

When printing is performed with a conventional 3D stereographic printing apparatus, the spatial parallax of the foreground becomes large as shown in FIG. 11, causing blurring. When printing is performed by the 3D stereographic printing apparatus of the present invention, as shown in FIG. 12, the overall spatial parallax can be prevented from becoming extremely large, so that photographic properties are improved.

When the main subject cannot be specified, such as a landscape photograph as shown in FIG. 13, the displacement is measured using an arbitrary position as a key sub. Generally, it is preferable 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, a key sub may be provided near the center of the screen.

[0026]

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

When the main subject can be specified, the position of the key subject 6 on the screen is designated by the cursor 3. The image processing unit captures the coordinates and image of the designated key subject, and the CCD camera uses the captured image information to
Scan and detect key subjects 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 stereographic 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 deviated from the near view or the distant view, is suppressed to an appropriate value, and the out-of-focus state is reduced. You can make few photos. Although the photographing target of the 3D stereoscopic photograph tended to be limited to a fixed composition, the 3D stereoscopic photographing device of the present invention enabled the photographing object to be irrespective of the position of the main subject, the background object, and the foreground object.
Landscape photography and the like are also effective in that a good three-dimensional photograph can be produced.

[Brief description of the drawings]

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

FIG. 2 is an explanatory diagram illustrating formation of a stereoscopic image of a 3D stereoscopic photograph taken by a three-lens camera.

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

FIG. 4 is a flowchart of a program for controlling the 3D stereographic printing apparatus of the present invention.

FIG. 5 is an explanatory diagram of an example in which printing is performed by the 3D stereographic printing apparatus of the present invention.

FIG. 6 is an explanatory diagram of an example in which printing is performed by the 3D stereographic printing apparatus of the present invention.

FIG. 7 is an explanatory diagram of an example in which printing is performed by the 3D stereographic printing apparatus of the present invention.

FIG. 8 is an explanatory diagram of an example in which printing is performed by the 3D stereographic printing apparatus of the present invention.

FIG. 9 is an explanatory diagram of an example in which printing is performed by the 3D stereographic printing apparatus of the present invention.

FIG. 10 is an explanatory diagram of an example in which printing is performed by the 3D stereographic printing apparatus of the present invention.

FIG. 11 is an explanatory diagram of an example in which printing is performed by the 3D stereographic printing apparatus of the present invention.

FIG. 12 is an explanatory diagram of an example in which printing is performed by the 3D stereographic printing apparatus of the present invention.

FIG. 13 is an explanatory diagram of an example in which printing is performed by the 3D stereographic printing apparatus of the present invention.

FIG. 14 is an explanatory view showing an embodiment of a 3D stereographic printing apparatus of the present invention.

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

FIG. 16 is an explanatory diagram showing an embodiment of a 3D stereographic printing apparatus of the present invention.

[Description of Signs] 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

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Hajiro Meiraku 579-1 Umehara, Wakayama-shi, Wakayama Noritsu Koki Co., Ltd. (56) References JP-A-3-185438 (JP, A) JP-A-Hei 5-210181 (JP, A)

Claims (2)

(57) [Claims] 1. A 3D stereographic printing method using a lenticular sheet, wherein one 3D stereographic printing method is performed by a negative monitoring device.
The amount of deviation of the key subject on the main subject between a plurality of negatives constituting the stereoscopic photograph is measured. If the deviation of the key subject on the main subject is larger than a threshold value, the main subject is in the foreground. Is corrected so as to suppress the parallax of the background object, and if the deviation amount of the key subject on the main subject is smaller than the threshold, it is determined that the main subject is in a distant view and the parallax of the foreground object is suppressed. A 3D stereographic printing method characterized by performing exposure after correcting. 2. A 3D stereographic printing apparatus using a lenticular sheet, wherein a negative monitoring means for measuring a shift amount of a key subject on a main subject of each negative, and a threshold value between the shift amount of the key subject on the main subject and a threshold value. A 3D stereographic printing apparatus comprising: a comparing unit; and a correcting unit that suppresses parallax of a background object or a near-field object based on a result from the comparing unit.