CN108337501B - Method and device for determining naked eye 3D optimal viewing distance - Google Patents
Method and device for determining naked eye 3D optimal viewing distance Download PDFInfo
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Abstract
The embodiment of the invention discloses a method and a device for determining an optimal naked eye 3D viewing distance, wherein the method comprises the following steps: displaying a preset row diagram through a naked eye 3D display device, wherein the preset row diagram comprises: a left-eye monochromatic view and a right-eye monochromatic view, the left-eye monochromatic view and the right-eye monochromatic view being different in color; moving a color camera in a direction perpendicular to a display surface of the naked eye 3D display device, wherein the color camera faces the display surface of the naked eye 3D display device, an optical axis of the color camera is always aligned to the center of the display surface in a moving process, and at least one image displayed by the naked eye 3D display device is acquired through the color camera in the moving process; and determining the optimal viewing distance of the naked eye 3D display device according to the distribution condition of the left eye monochromatic pixels and the right eye monochromatic pixels in the acquired image. Compared with other modes, the naked eye 3D display device does not need to be scanned, the time required for determining the optimal viewing distance can be reduced, and the calculation efficiency for determining the optimal viewing distance is improved.
Description
Technical Field
The invention relates to the technical field of naked eye 3D display, in particular to a method and a device for determining an optimal naked eye 3D viewing distance.
Background
The naked eye 3D display is widely applied to various fields such as advertisements, media, demonstration teaching, exhibition and show, film and television and the like. The three-dimensional display technology is different from the traditional binocular 3D display technology, and the naked eye 3D display has the unique characteristic of naked eyes, namely, the viewer can view the 3D effect without wearing glasses or helmets, and the realistic depth of field and stereoscopic impression of the naked eye 3D display greatly improve the visual impact and immersion of the viewer during viewing experience, so that the three-dimensional display technology becomes an optimal display product for product popularization, public propaganda and image playing.
The principle of naked eye 3D display is generally that an image displayed on a display is split by a lens, different display contents are refracted to different places in a space by the lens through the refraction effect of light, the display contents are separated when reaching human eyes, and the human eyes receive two images containing parallax, so that a stereoscopic effect is generated. Since the principle of the naked eye 3D display is that the left eye and the right eye can see images of different viewpoints through refraction of light to generate a 3D effect, and the distance between the two eyes of a person is usually about 65mm, an optimal viewing distance is usually available for the naked eye 3D display, and a viewer can obtain a better 3D viewing effect at the optimal viewing distance. Thus, for a naked eye 3D display, it is desirable to determine the optimal viewing distance of the naked eye 3D display for the user.
At present, the optimal viewing distance of the naked eye 3D display can be calculated in the following two modes, wherein the first mode is that a 3D test chart is played, the spatial brightness distribution at the front end of the 3D display is scanned, the distribution of spatial 3D crosstalk is calculated, and the position of the optimal viewing distance is found according to the crosstalk distribution condition; and the second mode is to play a 3D test chart, respectively measure two points on the center horizontal line of the naked eye 3D display, which are close to the left side edge and the right side edge, by using a point measurement luminance meter, obtain the distribution condition of the luminance of the two points along with the viewing angle in the horizontal plane, and find the intersection point of the two points in the luminance peak value direction. And calculating the optimal viewing distance according to the intersection point. Although the two methods can determine the optimal viewing distance of the naked eye 3D display, the two methods have the step of point-by-point scanning or rotary scanning, so that the time for determining the optimal viewing distance of the naked eye 3D display is too long.
Disclosure of Invention
In view of this, the embodiment of the invention provides a method and a device for determining an optimal viewing distance of naked eyes 3D, so as to achieve the purpose of quickly determining the optimal viewing distance of naked eyes 3D.
In a first aspect, an embodiment of the present invention provides a method for determining an optimal viewing distance of naked eyes 3D, including:
displaying a preset row diagram through the naked eye 3D display device, wherein the preset row diagram comprises: a left-eye monochromatic view and a right-eye monochromatic view, the colors of the left eye monochromatic view and the right eye monochromatic view are different;
moving a color camera in a direction perpendicular to a display surface of the naked eye 3D display device, wherein the color camera faces the display surface of the naked eye 3D display device, an optical axis of the color camera is always aligned to the center of the display surface in a moving process, and at least one image displayed by the naked eye 3D display device is acquired through the color camera in the moving process;
and determining the optimal viewing distance of the naked eye 3D display device according to the color of the acquired image.
In a second aspect, an embodiment of the present invention further provides a device for determining an optimal viewing distance of naked eyes 3D, including:
the fixing piece is used for fixing the naked eye 3D display device;
an alignment axis perpendicular to a display surface of the naked eye 3D display device; the color camera is in sliding connection with the alignment shaft so that the color camera slides along a first direction, the color camera faces a display surface of the naked eye 3D display device, and an optical axis of the color camera is always aligned with the center of the display surface in the sliding process;
the image processing module is used for determining the optimal viewing distance of the naked eye 3D display device according to the image acquired by the color camera in the sliding process when the naked eye 3D display device displays a preset row image.
According to the method and the device for determining the naked eye 3D optimal viewing distance, the preset row diagram is played, the color camera capable of moving in the direction perpendicular to the display surface of the naked eye 3D display device is used for shooting images in the moving process, the optical axis of the color camera is always aligned to the center of the display surface in the moving process, and the optimal viewing distance is determined according to the pixel distribution characteristics in the preset row diagram in the acquired images by utilizing the characteristic of interleaving left and right eye images in the center of the optimal viewing distance optical axis. Compared with other modes, the naked eye 3D display device does not need to be scanned, the time required for determining the optimal viewing distance can be reduced, and the calculation efficiency for determining the optimal viewing distance is improved.
Drawings
Other features, objects and advantages of the present invention will become more apparent upon reading of the detailed description of non-limiting embodiments, made with reference to the accompanying drawings in which:
fig. 1 is a flowchart of a method for determining an optimal viewing distance of naked eyes 3D according to an embodiment of the present invention;
FIG. 2 is a schematic view of left-eye pixel and right-eye pixel ray interleaving for different positions of a naked eye 3D display device;
fig. 3 is a flowchart of a method for determining an optimal viewing distance of naked eyes 3D according to a second embodiment of the present invention;
FIG. 4a is a statistical plot of the number of left and right eye monochrome pixels in an image acquired at point A;
FIG. 4B is a statistical plot of the number of left and right eye monochrome pixels in an image acquired at point B;
FIG. 4C is a statistical plot of the number of left and right eye monochrome pixels in an image acquired at point C;
fig. 5 is a flowchart of a method for determining an optimal viewing distance of naked eyes 3D according to a third embodiment of the present invention;
fig. 6 is a block diagram of a device for determining an optimal viewing distance of naked eyes 3D according to a fourth embodiment of the present invention;
fig. 7 is a block diagram of a device for determining an optimal viewing distance of naked eyes in 3D according to a fifth embodiment of the present invention.
In the figure:
1. an alignment shaft; 2. a color camera; 3. naked eye 3D display device; 4. a carrying platform;
5. a motor; 6. a slide block; 7. a first shaft; 8. and a second shaft.
Detailed Description
The invention is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all, of the structures associated with the present invention are shown in the drawings.
Example 1
Fig. 1 is a flowchart of a method for determining an optimal viewing distance of a naked eye 3D according to an embodiment of the present invention, where the method of the present embodiment is applicable to determining an optimal viewing distance of a naked eye 3D display device. May be performed by means of a naked eye 3D best viewing distance determination device, which may be implemented in hardware and/or software.
Referring to fig. 1, the method for determining the naked eye 3D best viewing distance includes:
s110, displaying a preset row diagram through a naked eye 3D display device, wherein the preset row diagram comprises: a left-eye monochromatic view and a right-eye monochromatic view, the left-eye monochromatic view and the right-eye monochromatic view being different in color.
The naked eye 3D display device realizes the naked eye 3D display effect based on different image contents of left and right eyes. Therefore, the naked eye 3D display device needs to display stereoscopic images, i.e., left-eye images and right-eye images, according to the line map. For example, the display is arranged and displayed on the screen according to preset display contents. In this embodiment, in order to determine an optimal viewing distance of the naked eye 3D display device, the preset line drawing includes: a left eye monochromatic view and a right eye monochromatic view. For example, the left-eye view and the right-eye view display only a single color, i.e., all pixels in the left-eye view are the same color, all pixels in the right-eye view are the same color, and the colors of the left-eye and right-eye monochromatic views are different. Illustratively, all pixels of the left eye view may be black and all pixels of the right eye view may be white; or all pixels of the left eye view may be red, all pixels of the right eye view may be blue, etc.
S120, moving a color camera in the direction perpendicular to the display surface of the naked eye 3D display device, wherein the color camera faces the display surface of the naked eye 3D display device, the optical axis of the color camera is always aligned to the center of the display surface in the moving process, and at least one image displayed by the naked eye 3D display device is acquired through the color camera in the moving process.
In this embodiment, an image displayed by the naked eye 3D display device is captured by a color camera. The image content viewed by the viewer can be simulated with the color camera. The color camera is perpendicular to the display surface of the naked eye 3D display device and can move freely along the direction perpendicular to the display surface of the naked eye 3D display device, and the color camera faces the display surface of the naked eye 3D display device, so that the color camera can capture images displayed by the naked eye 3D display device. In addition, the optical axis of the color camera is always aligned with the center of the display surface during the movement. The optical axis of the color camera may be a line perpendicular to the mirror plane through the center of the lens. Fig. 2 is a schematic view of ray interleaving for left-eye pixels and right-eye pixels at different positions of a naked eye 3D display device. The left light may be a pixel point corresponding to left eye viewing, and the right optical fiber may be a pixel point corresponding to right eye viewing. A is an acquired image point far from the optimal viewing distance, B is an acquired image point of the optimal viewing distance, and C is an acquired image point between the optimal viewing distance and the naked eye 3D display device. As can be seen from fig. 2, for points at different left and right positions on a plane parallel to the display surface at an optimal viewing distance from the display surface, the pixels of the left eye line image and the pixels of the right eye line image do not necessarily have to be interlaced at the points. For points at different positions, the pixels of the left eye line image and the pixels of the right eye line image are not necessarily interlaced at the points. But on a straight line perpendicular to the center of the display surface, the pixels of the left eye line image and the pixels of the right eye line image are interlaced at a point with the optimal viewing distance from the display surface. Therefore, it is necessary to align the optical axis of the color camera with the center of the display surface all the time during the movement. For example, the color camera may be set at a fixed axis perpendicular to one of the display surfaces, and the foot of the fixed axis perpendicular to the display surface is correspondingly disposed with respect to the center of the display surface so that the optical axis of the color camera is aligned with the center of the display surface. And the color camera can slide along the fixed shaft, and can acquire images displayed by at least one naked eye 3D display device in the sliding process. Optionally, the sliding distance of the color camera may be preset, and after the sliding is completed, an image displayed by the naked eye 3D display device is acquired. And the sliding range can be determined according to the optimal viewing distance of other naked eye 3D display devices in the same batch. And determining the step length of each sliding according to the range so as to realize more accurate measurement of the optimal viewing distance of the naked eye 3D display device.
And S130, determining the optimal viewing distance of the naked eye 3D display device according to the distribution condition of the left eye monochromatic pixels and the right eye monochromatic pixels in the acquired image.
As can be seen from fig. 2, for the images acquired by the color camera during the movement, the images acquired by the color camera at different positions during the movement are different due to the different interleaving relations of the left-eye monochromatic line drawing and the right-eye monochromatic line drawing at different distances from the display surface of the naked eye 3D display device. For example: the left-eye monochromatic area is located on the left side of the image and the right-eye monochromatic area is located on the right side of the image at some locations. And the sizes of the left-eye and right-eye monochromatic areas also vary with position. Therefore, the optimal viewing distance of the naked eye 3D display device can be determined according to the distribution condition of the left eye monochromatic pixels and the right eye monochromatic pixels in the images acquired at different distances. For example, it may be determined that a distance between the sliding acquisition position corresponding to the image with the color of uniform mixed color and the naked eye 3D display device is an optimal viewing distance of the naked eye 3D display device. The uniformly mixed color may be a color obtained by an average mixture of left-eye single color and right-eye single color. For example: the uniform mixed color of black and white is gray; the evenly mixed color of blue and purple is purple, and the evenly mixed color of red and yellow is orange. Optionally, the acquisition position of the image can be determined according to the color of the image captured by the color camera, and the position is determined to be the optimal viewing distance of the naked eye 3D display device. For example, when the left eye single color and the right eye single color are white and black, respectively, when the acquired image color is gray, the distance between the acquisition position corresponding to the image and the naked eye 3D display device is used as the optimal viewing distance of the naked eye 3D display device.
In this embodiment, the color of the image may be determined according to the RGB values of the pixels in the acquired image, and the determined color may be compared with the uniformly mixed color to determine whether the color of the acquired image is the uniformly mixed color. Alternatively, the image may be converted to a gray scale map, and the gray scale of the gray scale map is compared with the gray scale of the uniformly mixed color to determine whether the color of the acquired image is the uniformly mixed color.
According to the embodiment, the preset row diagram is played, the color camera capable of moving in the direction perpendicular to the display surface of the naked eye 3D display device is utilized to shoot images in the moving process, the optical axis of the color camera is always aligned to the center of the display surface in the moving process, the characteristic that left and right eye images are interwoven in the position of the center of the optical axis of the optimal viewing distance is utilized, and the optimal viewing distance is determined according to the pixel distribution characteristics in the preset row diagram in the acquired images. Compared with other modes, the naked eye 3D display device does not need to be scanned, the time required for determining the optimal viewing distance can be reduced, and the calculation efficiency for determining the optimal viewing distance is improved.
In a preferred implementation of this embodiment, the left-eye single color may be red or blue, and the right-eye single color may be blue or red. Since the mixed color in the image collected by the color camera is a new color which can be observed by human eyes as two kinds of color light are mixed. Therefore, two kinds of light with larger wavelength difference can be selected as the left eye single color and the right eye single color, so that the mixed new color can be more prominent, and the accuracy of determining the optimal viewing distance can be improved. Wherein, the wavelength of blue is 445-450nm, and the wavelength of red is 650nm. The wavelength difference of the above two lights is large, and therefore, the left-eye monochrome can be set to red or blue, and the right-eye monochrome can be set to blue or red. Accordingly, the homogeneously mixed color may be purple. By setting the left-eye monochrome to red or blue and the right-eye monochrome to blue or red, the accuracy of determining the optimum viewing distance can be improved.
Example two
Fig. 3 is a flowchart of a method for determining an optimal viewing distance of naked eyes 3D according to a second embodiment of the present invention. In this embodiment, the distance between the sliding acquisition position corresponding to the image with the determined color being the uniform mixed color and the naked eye 3D display device is the optimal viewing distance of the naked eye 3D display device, which is specifically optimized as follows: and determining the distance between the sliding acquisition position corresponding to the image with all pixels of the same row of uniform mixed colors and the naked eye 3D display device as the optimal viewing distance of the naked eye 3D display device.
Referring to fig. 3, the method for determining the naked eye 3D best viewing distance includes:
s210, displaying a preset row diagram through a naked eye 3D display device, wherein the preset row diagram comprises: a left-eye monochromatic view and a right-eye monochromatic view, the left-eye monochromatic view and the right-eye monochromatic view being different in color.
S220, moving a color camera in the direction perpendicular to the display surface of the naked eye 3D display device, wherein the color camera faces the display surface of the naked eye 3D display device, the optical axis of the color camera is always aligned to the center of the display surface in the moving process, and at least one image displayed by the naked eye 3D display device is acquired through the color camera in the moving process.
S230, determining that the distance between the sliding acquisition position corresponding to the image with all pixels of the same row of the image being of uniform mixed colors and the naked eye 3D display device is the optimal viewing distance of the naked eye 3D display device.
Fig. 4a is a statistical diagram of the change in the numbers of the left-eye monochrome pixels and the right-eye monochrome pixels in the image acquired at the point a, fig. 4B is a statistical diagram of the change in the numbers of the left-eye monochrome pixels and the right-eye monochrome pixels in the image acquired at the point B, and fig. 4c is a statistical diagram of the change in the numbers of the left-eye monochrome pixels and the right-eye monochrome pixels in the image acquired at the point B. Wherein, the x-axis in the image represents the position coordinates, the y-axis represents the pixel number, the solid line represents the left-eye monochromatic pixel variation curve, and the dotted line represents the right-eye monochromatic pixel variation curve. As can be seen from fig. 4a, 4b and 4c, for images acquired during movement of the color camera, the arrangement of left-eye monochrome pixels and right-eye monochrome pixels of the images acquired at different positions is different due to different interleaving relations of the left-eye monochrome line drawing and the right-eye monochrome line drawing at different distances from the display surface of the naked eye 3D display device. Only all pixels in the image acquired at the optimal line-of-sight position are of the same color, i.e. uniformly mixed. For images acquired at other positions, the same column of pixels in the vertical direction has the same color, which can be left-eye single color or right-eye single color, but the same row of pixels in the horizontal direction has two colors, namely left-eye single color and right-eye single color. Therefore, according to whether all pixels in any row of the image in the acquired image are uniformly mixed, the distance between the position corresponding to the image and the naked eye 3D display device can be determined to be the optimal viewing distance.
According to the embodiment, the distance between the sliding acquisition position corresponding to the image with the determined color being the uniform mixed color and the naked eye 3D display device is the optimal viewing distance of the naked eye 3D display device, and the method is specifically optimized as follows: and determining the distance between the sliding acquisition position corresponding to the image with the uniform mixed color of all pixels in the same row in the image and the naked eye 3D display device as the optimal viewing distance of the naked eye 3D display device. The number of pixels of the image to be analyzed can be reduced, so that the calculation efficiency is improved, and the time for determining the optimal viewing distance of the naked eye 3D display device is saved.
Example III
Fig. 5 is a flowchart of a method for determining an optimal viewing distance of naked eyes 3D according to a third embodiment of the present invention. The present embodiment is optimized based on the foregoing embodiment, and in this embodiment, the moving the color camera in a direction perpendicular to a display surface of the naked eye 3D display device is specifically optimized as follows: when the pixels of the left area of the image are left-eye monochromatic and the pixels of the right area are right-eye monochromatic, the color camera is moved towards the direction approaching to the naked eye 3D display device; and when the pixels of the left area of the image are monochromatic for the right eye, the color camera is moved to the direction away from the naked eye 3D display device.
Referring to fig. 5, the method for determining the naked eye 3D best viewing distance includes:
s310, displaying a preset row diagram through a naked eye 3D display device, wherein the preset row diagram comprises: a left-eye monochromatic view and a right-eye monochromatic view, the left-eye monochromatic view and the right-eye monochromatic view being different in color.
S320, when the left area pixel of the image is left eye monochromatic and the right area pixel is right eye monochromatic, the color camera is moved towards the direction close to the naked eye 3D display device, or when the left area pixel of the image is right eye monochromatic and the right area pixel is left eye monochromatic, the color camera is moved towards the direction far away from the naked eye 3D display device; the color camera faces the display surface of the naked eye 3D display device, and the optical axis of the color camera is always aligned to the center of the display surface in the moving process.
Referring to fig. 2 and fig. 4a, 4b and 4c, as described above, the image acquired by the color camera varies with distance due to the variation of the light interleaving relationship caused by the difference of the distance from the naked eye 3D display device. Illustratively, in the region between the optimal viewing distance and the naked eye 3D display device, the right eye monochrome pixels are in the left region of the captured image, and the left eye monochrome pixels are in the right region of the captured image. And in the process of moving to the optimal visual distance, the right-eye monochromatic pixel area gradually increases along with the increase of the distance, and the left-eye monochromatic pixel area is reduced along with the increase of the distance. Correspondingly, in the region outside the optimal viewing distance, left-eye monochrome pixels are in the right region of the acquired image, and right-eye monochrome pixels are in the left region of the acquired image. And when moving away from the naked eye 3D display device, the left-eye monochromatic pixel area gradually increases along with the increase of the distance, and the right-eye monochromatic pixel area gradually decreases along with the increase of the distance. Therefore, according to the characteristics, the movement mode of the color camera can be set, so that the reduction of the movement distance of the color camera and the determination of the optimal viewing distance duration are realized. For example, the color camera may be moved toward the naked eye 3D display device when the left-side area pixel of the image is a left-eye monochrome and the right-side area pixel is a right-eye monochrome, or moved toward the naked eye 3D display device when the left-side area pixel of the image is a right-eye monochrome and the right-side area pixel is a left-eye monochrome.
S330, in the moving process, at least one image displayed by the naked eye 3D display device is acquired through a color camera.
And S340, determining the optimal viewing distance of the naked eye 3D display device according to the distribution condition of the left eye monochromatic pixels and the right eye monochromatic pixels in the acquired image.
The embodiment specifically optimizes the color camera moving in the direction perpendicular to the display surface of the naked eye 3D display device: when the pixels of the left area of the image are left-eye monochromatic and the pixels of the right area are right-eye monochromatic, the color camera is moved towards the direction approaching to the naked eye 3D display device; and when the pixels of the left area of the image are monochromatic for the right eye, the color camera is moved to the direction away from the naked eye 3D display device. The direction of movement of the color camera can be determined from the image characteristics of the different positions,
example IV
Fig. 6 is a schematic structural diagram of a device for determining a naked eye 3D best viewing distance according to a fourth embodiment of the present invention, where the device for determining a naked eye 3D best viewing distance according to the present embodiment may be used to execute the method for determining a naked eye 3D best viewing distance according to the foregoing embodiment. Referring to fig. 5, the device for determining the optimal viewing distance of naked eye 3D includes: the fixing piece is used for fixing the naked eye 3D display device; an alignment axis perpendicular to a display surface of the naked eye 3D display device; the color camera is in sliding connection with the alignment shaft so that the color camera slides along a first direction, the color camera faces a display surface of the naked eye 3D display device, and an optical axis of the color camera is always aligned with the center of the display surface in the sliding process; the image processing module is used for determining the optimal viewing distance of the naked eye 3D display device according to the distribution condition of the left eye monochromatic pixels and the right eye monochromatic pixels in the acquired image when the naked eye 3D display device displays a preset row chart, and the naked eye 3D display device can be fixed on a fixing piece in a hanging or flat-laying mode and the like so as to fix the naked eye 3D display device in the process of determining the optimal viewing distance of the naked eye 3D display device, so that the situation of movement is prevented, and the fixing piece can comprise a hanging fixing frame or a carrying platform. The naked eye 3D display device can be fixed on the hanging fixing frame or the carrying platform in a bolt connection or pasting mode. In this embodiment, the fixing piece adopts the carrying platform, and the naked eye 3D display device can be horizontally placed on the carrying platform and fixed.
The alignment axis needs to be perpendicular to the display surface of the naked eye 3D display device, and the foot hanging position of the alignment axis is arranged corresponding to the display surface of the naked eye 3D display device, so that the optical axis of the color camera mounted on the alignment axis is aligned to the center position of the display surface. Optionally, the distance between the alignment axis and the fixing member may be determined according to the minimum viewing distance of the naked eye 3D display device and the thickness of the naked eye 3D display device, and the length of the alignment axis may be determined according to the optimal viewing distance range of the naked eye 3D display device determined as required
The color camera is used for collecting images displayed by the naked eye 3D display device. The color camera is slidably coupled to the alignment shaft such that the color camera is slidable on the alignment shaft in a first direction. The first direction may be a direction along an alignment axis. The color camera may be fixed on a sliding block, the alignment shaft is provided with a sliding rail, and the sliding block is matched with the sliding rail, so that the color camera may freely slide on the alignment shaft in two directions close to or far from the display surface, and in the sliding process, the optical axis of the color camera may always be aligned with the center of the display surface. The color camera faces the display surface of the naked eye 3D display device, and images displayed by the naked eye 3D display device can be collected at various positions.
The device for determining the naked eye 3D optimal viewing distance further comprises: the image processing module is used for determining the optimal viewing distance of the naked eye 3D display device according to the distribution condition of the left eye monochromatic pixels and the right eye monochromatic pixels in the acquired image when the naked eye 3D display device displays a preset row chart. The image processing module may be implemented in software and/or hardware. The image processing module analyzes pixels in the acquired image, and determines that the distance between the acquisition position corresponding to the image and the naked eye 3D display device is the optimal viewing distance when all pixels in the image are uniform mixed colors formed by left eye single color and right eye single color. Wherein the uniformly mixed color may be a color obtained by uniformly mixing left-eye monochromatic colors and right-eye monochromatic colors.
Optionally, the device for determining the optimal viewing distance of naked eye 3D may further include: the first driving mechanism comprises a motor, a sliding block and a screw rod, wherein the sliding block is in threaded connection with the screw rod, and the motor drives the screw rod to rotate so as to drive the sliding block to linearly move. Illustratively, the screw is threadably coupled to the slider. The motor can drive the screw rod to rotate, and when the screw rod rotates, the sliding block is driven to linearly move. The screw rod can rotate clockwise or anticlockwise so as to drive the sliding block to move forwards or backwards along a straight line, and further drive the sliding block to move on the alignment shaft along the direction far away from or close to the naked eye 3D display device. By adding the first driving mechanism, the movement of the color camera can be conveniently controlled. Furthermore, the motor can adopt a servo motor, so that the speed can be controlled, the position accuracy is very accurate, and the voltage signal can be converted into torque and rotating speed to drive a control object. By adopting the servo motor, the displacement distance and the speed of the sliding block can be accurately controlled, so that the accurate control of the position of the color camera on the alignment shaft is realized.
Optionally, the device for determining the naked eye 3D optimal viewing distance further comprises an upper computer, wherein the upper computer can send pulse signals to the servo motor according to the moving step length through servo motor control software, so that the color camera can be driven by the servo motor to move to a designated position, and the naked eye 3D optimal viewing distance can be determined more accurately.
According to the naked eye 3D optimal viewing distance determining device provided by the embodiment, the preset row of images is played, the color camera capable of moving in the direction perpendicular to the display surface of the naked eye 3D display device is utilized to shoot images in the moving process, the optical axis of the color camera is always aligned to the center of the display surface in the moving process, and the optimal viewing distance is determined according to the pixel distribution characteristics in the preset row of images in the acquired images by utilizing the characteristic of interleaving left and right eye images at the center of the optical axis of the optimal viewing distance. Compared with other modes, the naked eye 3D display device does not need to be scanned, the time required for determining the optimal viewing distance can be reduced, and the calculation efficiency for determining the optimal viewing distance is improved.
In a preferred implementation of this embodiment, the apparatus further comprises: the alignment structure is used for adjusting the projection position of the alignment shaft on the display surface so that the optical axis of the color camera is always aligned to the center of the display surface in the sliding process; the alignment shaft is in sliding connection with the alignment structure.
Because there are naked eye 3D display devices or color cameras with different specifications, the optical axis of the color camera is not necessarily aligned to the center of the display surface during testing, so that the position of the alignment axis needs to be adjusted according to the actual testing situation, so that the optical axis of the color camera is aligned to the center of the display surface of the naked eye 3D display device. Therefore, an alignment device is needed to be added to align the positions of the alignment axes, so as to achieve the purpose that the optical axis of the color camera is always aligned with the center of the display surface during the sliding process. Illustratively, the alignment structure may include: the first shaft and the second shaft are perpendicular to each other, the second shaft is in sliding connection with the first shaft along a first direction, the alignment shaft is in sliding connection with the second shaft along a second direction relative to the second shaft, and the first direction and the second direction are perpendicular. Fig. 6 is a schematic structural diagram of an alignment structure in a device for determining an optimal viewing distance of naked eyes in a fifth embodiment of the present invention. As can be seen from fig. 6, the alignment structure includes: mutually perpendicular first a shaft and a second shaft. The second shaft can slide along the direction of the first shaft relative to the first shaft, and illustratively, a sliding rail is arranged on the first shaft, the second shaft is fixedly connected with the sliding block, and the second shaft can slide along the direction of the first shaft on the first shaft through the matching of the sliding block and the sliding rail. The alignment shaft can also be slidably connected with the second shaft through a sliding rail and sliding block structure, so that the alignment shaft can move on the second shaft. By setting the alignment structure, the optical axes of the color cameras can freely move on a plane parallel to the display surface of the naked eye 3D display device, so that the optical axes of the color cameras of different types can be aligned with the centers of the display surfaces of the naked eye 3D display devices of different specifications.
Alternatively, the alignment structure may further include a driving member, which may include two sets of motors, sliders, and a transmission mechanism, as an example. Each set of motors, sliders and transmission mechanisms may correspond to a first shaft and a second shaft, respectively. The second shafts are driven to slide in the first shaft direction and the alignment shafts are driven to slide in the second shaft direction. By setting the driving member, free movement of the alignment axis in a plane parallel to the display surface can be achieved. The transmission mechanism may be, for example, a ball screw or the like.
The alignment structure is added, so that the alignment shaft can freely move on a plane parallel to the display surface. According to the naked eye 3D display device or the color camera, the optical axis of the color camera can be aligned to the center of the display surface of the naked eye 3D display device by freely moving on the plane parallel to the display surface, and the measurement accuracy of the optimal viewing distance of the naked eye 3D display device can be further improved.
It should be noted that the above description is only of the preferred embodiments of the present invention and the technical principles applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, while the invention has been described in connection with the above embodiments, the invention is not limited to the embodiments, but may be embodied in many other equivalent forms without departing from the spirit or scope of the invention, which is set forth in the following claims.
Claims (11)
1. The method for determining the optimal viewing distance of the naked eye 3D is characterized by comprising the following steps of:
displaying a preset row diagram through a naked eye 3D display device, wherein the preset row diagram comprises: a left-eye monochromatic view and a right-eye monochromatic view, the left-eye monochromatic view and the right-eye monochromatic view being different in color;
moving a color camera in a direction perpendicular to a display surface of the naked eye 3D display device, wherein the color camera faces the display surface of the naked eye 3D display device, an optical axis of the color camera is always aligned to the center of the display surface in a moving process, and at least one image displayed by the naked eye 3D display device is acquired through the color camera in the moving process;
determining the optimal viewing distance of the naked eye 3D display device according to the distribution condition of the left eye monochromatic pixels and the right eye monochromatic pixels in the acquired image;
the determining the optimal viewing distance of the naked eye 3D display device according to the color of the acquired image comprises the following steps:
and determining that the distance between the sliding acquisition position corresponding to the image with the uniform mixed color and the naked eye 3D display device is the optimal viewing distance of the naked eye 3D display device, wherein the uniform mixed color is obtained by mixing left eye single color and right eye single color.
2. The method according to claim 1, wherein determining that the distance between the slide acquisition position corresponding to the image with the uniformly mixed color in the image and the naked eye 3D display device is the optimal viewing distance of the naked eye 3D display device includes:
and determining the distance between the sliding acquisition position corresponding to the image with all pixels of any row of the image being of uniform mixed colors and the naked eye 3D display device as the optimal viewing distance of the naked eye 3D display device.
3. The method of claim 1, wherein the left-eye single color is red or blue and the right-eye single color is blue or red.
4. The method of claim 1, wherein moving the color camera in a direction perpendicular to a display surface of the naked eye 3D display device comprises:
when the pixels of the left area of the image are left-eye monochromatic and the pixels of the right area are right-eye monochromatic, the color camera is moved towards the direction approaching to the naked eye 3D display device;
and when the pixels of the left area of the image are monochromatic for the right eye, the color camera is moved to the direction away from the naked eye 3D display device.
5. The device for determining the optimal viewing distance of naked eyes 3D is characterized by comprising the following components:
the fixing piece is used for fixing the naked eye 3D display device;
an alignment axis perpendicular to a display surface of the naked eye 3D display device;
the color camera is used for collecting images displayed by the naked eye 3D display device, the color camera is connected with the alignment shaft in a sliding mode, so that the color camera slides along a first direction, the color camera faces to the display surface of the naked eye 3D display device, and the optical axis of the color camera is always aligned to the center of the display surface in the sliding process;
the image processing module is used for determining the optimal viewing distance of the naked eye 3D display device according to the distribution condition of the left eye monochromatic pixels and the right eye monochromatic pixels in the acquired image when the naked eye 3D display device displays a preset row image;
displaying a preset row diagram through the naked eye 3D display device, wherein the preset row diagram comprises: a left-eye monochromatic view and a right-eye monochromatic view, the left-eye monochromatic view and the right-eye monochromatic view being different in color;
the first direction is along the alignment axis;
the determining the optimal viewing distance of the naked eye 3D display device according to the color of the acquired image comprises the following steps:
and determining that the distance between the sliding acquisition position corresponding to the image with the uniform mixed color and the naked eye 3D display device is the optimal viewing distance of the naked eye 3D display device, wherein the uniform mixed color is obtained by mixing left eye single color and right eye single color.
6. The apparatus according to claim 5, characterized in that the device further comprises:
the first driving mechanism comprises a motor, a sliding block and a screw rod, wherein the sliding block is in threaded connection with the screw rod, and the motor drives the screw rod to rotate so as to drive the sliding block to linearly move.
7. The apparatus of claim 6, wherein the motor comprises:
a servo motor.
8. The apparatus of claim 5, wherein the fixture comprises:
and the carrying platform is used for carrying the naked eye 3D display device.
9. The apparatus of claim 5, wherein the apparatus further comprises:
the alignment structure is used for adjusting the projection position of the alignment shaft on the display surface so that the optical axis of the color camera is always aligned to the center of the display surface in the sliding process;
the alignment shaft is in sliding connection with the alignment structure.
10. The apparatus of claim 9, wherein the alignment structure comprises:
the first shaft and the second shaft are perpendicular to each other, the second shaft is in sliding connection with the first shaft along a first direction, the alignment shaft is in sliding connection with the second shaft along a second direction relative to the second shaft, and the first direction and the second direction are perpendicular.
11. The apparatus of claim 7, wherein the apparatus further comprises:
the upper computer is used for controlling the servo motor so that the color camera slides according to the set movement range and movement step length under the drive of the sliding block.
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