JP2001186549A - Measurement device for amount of stereoscopic display crosstalk - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a measurement device for the amount of stereoscopic display crosstalk, that ca measure the crosstalk quantity through visual observation to some degree of accuracy. SOLUTION: A crosstalk amount measurement signal generator (1) generates a pattern signal (2) with a parallax in the horizontal direction and the signal (2) is displayed on an evaluation object stereoscopic display device (3), a viewer (4) uses only one eye in both the eyes to simultaneously view a video image by the one eye and a leaked video image from the video image of the another one eye, adjusts the level of the video image of the one eye, so that the difference between the level of the video image of the one eye and the level of the leaked video image from the video image of the one eye can be eliminated and estimates the level of the leaked video image from the adjusted amount.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for measuring the amount of crosstalk of a stereoscopic display device.

[0002]

2. Description of the Related Art In a device for displaying a stereoscopic image by presenting an image having parallax to both eyes, mutual leakage of a left image and a right image may occur if the left and right images are not well separated. This causes crosstalk.

[0003] The causes of crosstalk differ depending on the stereoscopic display system. In the case of the projection type polarization system, since linear polarization is not maintained and converted into elliptically polarized light due to birefringence caused by the projection screen, it is considered that crosstalk occurs because left and right images cannot be completely separated. Further, in the case of the time-division stereoscopic display device, it is considered that the light blocking rate of the shutter is not sufficient and the afterglow of the CRT is a cause. Further, in the case of the lenticular or image splitter method, crosstalk occurs depending on the optical arrangement of the image display surface and the lens and the like and the viewing position.

Since such crosstalk deteriorates the image quality of a stereoscopic video, it is important to grasp the amount of crosstalk of an actual stereoscopic video display device in providing a high-quality stereoscopic video. Become. Conventionally, in order to measure the amount of crosstalk of a three-dimensional display device, the amount of crosstalk is obtained by actually measuring the amount of leakage between left and right images using an optical measuring device such as a luminance meter.

[0005]

In the case of a glasses-type stereoscopic display device, it is necessary to perform measurement through glasses, and when this measurement is performed using an optical measuring device, the position and orientation of the glasses are not observed during actual observation. In some cases, the measurement was not performed accurately. In addition, an optical measuring device such as a luminance meter was required for the measurement.

Accordingly, an object of the present invention is to provide a crosstalk amount which can be measured by visual measurement without using optical measuring equipment and exhibits a certain degree of accuracy in a site where a stereoscopic display device is actually used, such as an exhibition or at home. It is an object of the present invention to provide a three-dimensional display crosstalk amount measuring device having the measuring capability of the above.

[0007]

To achieve this object, a first aspect of the present invention is a stereoscopic display crosstalk amount measuring apparatus which displays a stereoscopic display crosstalk amount measuring signal on a stereoscopic video display. And a device for measuring the amount of crosstalk by reading it, comprising: comparing the amount of crosstalk from one image to the other with the signal level of the other image to determine the amount of stereoscopic crosstalk. A three-dimensional display to be evaluated; a first signal generator for generating a high-brightness pattern for one of the left and right images having the presented parallax; and an image for another image under external control And a second signal generator having a function of changing the level of the second signal.

According to a second aspect of the present invention, there is provided an apparatus for measuring a crosstalk amount by displaying a stereoscopic display crosstalk amount measurement signal on a stereoscopic image display and reading the signal. G: an evaluation target stereoscopic display that evaluates a stereoscopic display crosstalk amount by comparing a crosstalk amount from one image to the other image with a signal level of the other image; A first signal generator for generating a high-luminance pattern for one of the images; a second signal generator having a function for generating a step-type or lamp-type image for the other image; ; Characterized by having;

A third aspect of the present invention is an apparatus for measuring a crosstalk amount by displaying a stereoscopic display crosstalk amount measurement signal on a stereoscopic image display and reading the signal. Are provided with a crosstalk amount reader which combines stereoscopic image observation glasses and a neutral density filter.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. FIG. 1 shows a configuration example of a measuring device according to the present invention. In the first embodiment of the present invention, the left and right stereoscopic video signals 2 output from the crosstalk amount measurement signal generator 1 are displayed on a stereoscopic display 3 to be evaluated. The left and right stereoscopic video signals 2 at this time are, for example, as shown in FIG.
And a pattern having parallax between the left and right. The left image displays a window image of 0% black and 100% white. The right image displays a window image of x% gray on 0% black.

When this is observed only with the right eye using a three-dimensional display having crosstalk, a leak b from the left image is observed as shown in FIG. Here, by changing x, b
If the brightness and the brightness are the same, the crosstalk amount α of this display device can be obtained by α = K (x) / K (100). Here, K (x) is a conversion function between an electric signal and an optical signal in consideration of the gamma of the display device.

Referring to FIG. 4, a second embodiment of the present invention displays a window image in which the brightness y is changed stepwise on the right image in the first embodiment. Scales from yA to yB are displayed on the window image in accordance with the brightness level. When this is observed only with the right eye using a three-dimensional display device with crosstalk, a leak b from the left image is observed as shown in FIG. Here, when y at which the brightness is the same as b is read, the amount of crosstalk is obtained.

Referring to FIG. 6, a third embodiment of the present invention relates to a crosstalk measuring neutral density filter 8 between a stereoscopic display 5 to be evaluated and, for example, the left side 7 of the stereoscopic video observation glasses.
Place. 10 images on the left image of the stereoscopic display 5 to be evaluated
When 0% white and 0% black are displayed in the right image, the left image is observed through the dimming filter 8 in the left image observation glasses 7, and the left image is observed in the right image observation glasses 6. Crosstalk is observed. this,
The left and right images are observed simultaneously by both eyes, and the dimming filter 8 is adjusted so that the brightness of the left and right images is constant. Assuming that the dimming rate of the dimming filter 8 at this time is P (%), the crosstalk amount is P (%).

Although the embodiments of the present invention have been described with reference to several embodiments, it is obvious that the present invention is not limited to these embodiments and that various modifications and changes can be made within the scope of the invention. There will be.

[0015]

According to the present invention, since the amount of crosstalk can be measured by eye measurement, the crosstalk of the three-dimensional image display device can be measured without using an optical measuring device in a place where the three-dimensional display device is actually used, such as in an exhibition or at home. The quantity can be known to a certain degree of accuracy, and the operational convenience is improved.

[Brief description of the drawings]

FIG. 1 is a diagram showing a configuration example of a measuring device according to the present invention.

FIG. 2 is a diagram showing an example of a left and right image for crosstalk measurement.

FIG. 3 is a diagram showing an image obtained by observing the example of FIG. 2 with only the right eye.

FIG. 4 is a diagram showing another example of the left and right images for crosstalk measurement.

FIG. 5 is a diagram showing an image obtained by observing the example of FIG. 4 with only the right eye.

FIG. 6 is a diagram showing a configuration example of a crosstalk measuring device using a neutral density filter.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Crosstalk amount measurement signal generator 2 Left (L) right (R) stereoscopic video signal 3,5 Evaluation target stereoscopic display 4 Observer 6 Right 3D video observation glasses 7 Left 3D video observation glasses 8 Darkening filter

Claims (3)

[Claims] 1. An apparatus for measuring a crosstalk amount by displaying a stereoscopic display crosstalk amount measurement signal on a stereoscopic image display and reading the signal, the apparatus comprising: a crosstalk from one image to another image. An evaluation target stereoscopic display for evaluating the amount of stereoscopic display crosstalk by comparing the amount with the signal level of the other image; and generating a high-luminance pattern in one of the left and right images having the presented parallax. A three-dimensional display crosstalk amount measuring device, comprising: a first signal generator; and a second signal generator having a function of changing the level of the image for another image by external control. . 2. An apparatus for measuring a crosstalk amount by displaying a stereoscopic display crosstalk amount measurement signal on a stereoscopic image display and reading the signal, the apparatus comprising: a crosstalk from one image to another image. An evaluation target stereoscopic display for evaluating the amount of stereoscopic display crosstalk by comparing the amount with the signal level of the other image; and generating a high-luminance pattern in one of the left and right images having the presented parallax. A three-dimensional display cloth comprising: a first signal generator; and a second signal generator having a function of generating an image of a step-type or lamp-type luminance level for the other image. Talk amount measuring device. 3. An apparatus for measuring a crosstalk amount by displaying a stereoscopic display crosstalk amount measurement signal on a stereoscopic image display and reading the signal, wherein the device combines stereoscopic image observation glasses and a neutral density filter. A three-dimensional display crosstalk amount measuring device comprising a crosstalk amount reader.