CN109302601B - Testing method and testing device for naked eye 3D display screen - Google Patents
Testing method and testing device for naked eye 3D display screen Download PDFInfo
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- CN109302601B CN109302601B CN201811196281.7A CN201811196281A CN109302601B CN 109302601 B CN109302601 B CN 109302601B CN 201811196281 A CN201811196281 A CN 201811196281A CN 109302601 B CN109302601 B CN 109302601B
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Abstract
The invention discloses a method for testing a naked eye 3D display screen, which comprises the following steps: moving the camera to the optimal viewpoint position of the naked eye 3D display screen; setting a naked eye 3D display screen to display a test picture; the test picture and the naked eye 3D display screen have the same length-width ratio, the center of the test picture is overlapped with the center of the naked eye 3D display screen, and the test picture covers part of the naked eye 3D display screen; the test picture is in the visual angle range of the camera; collecting a test picture displayed by a naked eye 3D display screen by using a camera; and calculating the image offset parameter of the naked eye 3D display screen according to the test image acquired by the camera. The method for testing the naked eye 3D display screen can meet the testing requirement when the optimal visual distance of the naked eye 3D display screen is lower, realizes the testing of the naked eye 3D display screen under the condition of different visual distances, improves the testing efficiency and saves the testing cost.
Description
Technical Field
The embodiment of the invention relates to a 3D display technology, in particular to a method and a device for testing a naked eye 3D display screen.
Background
A naked-eye three-dimensional (3D) display screen is widely used in various fields such as advertisement, media, demonstration teaching, exhibition and display, and movie and television. Different from the traditional binocular 3D display technology, the naked eye 3D display has the unique characteristics of the naked eyes, namely, the 3D effect can be viewed without the need of wearing glasses or helmets by audiences, the depth of field and the stereoscopic impression of the naked eyes are vivid, the visual impact and the immersion sense of the audiences during watching experience are greatly improved, and the display is the best display product for product popularization, public propaganda and image playing.
The principle of naked eye 3D display is that an image displayed by a display screen is split by a lens, different display contents are refracted to different places in a space by the lens under the refraction effect of light, the displayed contents are separated when the contents reach human eyes, and the two images with parallax are received by the human eyes, so that a three-dimensional effect is generated. Because the principle of the naked eye 3D display screen is that the left eye and the right eye see images of different viewpoints through light refraction to generate a 3D effect, an optimal visual distance generally exists for the naked eye 3D display screen, and a viewer can obtain a better 3D viewing effect at the optimal visual distance.
The method is characterized in that the naked eye 3D display screen is detected by a mode of interlacing a viewpoint diagram of a red-blue diagram through software, namely, the red-blue light splitting effect is achieved through the refraction effect of a lens on light, a camera head is arranged at the height of a camera corresponding to the optimal visual distance of the naked eye 3D display screen, the red-blue junction area of a product to be detected can be seen, and the visual center point offset of the naked eye 3D display screen and the angle deflection of the jointed 3D optical film can be accurately calculated through a straight line fitting tool of the software. And because during the optical design, receive the resolution ratio of product, screen thickness, technology etc. and the optimum stadia of the bore hole 3D display screen of often actual output is shorter, when doing the product test, original test scheme is because the camera visual angle is less, when falling the camera to the camera height that optimum stadia corresponds, lead to the camera not to gather the red blue picture that whole bore hole 3D shows, the image that detects software collection at this moment is the red blue picture of full screen display, consequently the tester can't accurately counterpoint camera center and bore hole 3D display screen center, has caused the puzzlement of detection.
Disclosure of Invention
The invention provides a method and a device for testing a naked eye 3D display screen, which can align the center of a camera and the center of the naked eye 3D display screen when the optimal visual distance is low, and realize the detection of the naked eye 3D display screen when the optimal visual distance is low.
In a first aspect, an embodiment of the present invention provides a method for testing a naked eye 3D display screen, including:
moving the camera to the optimal viewpoint position of the naked eye 3D display screen;
setting the naked eye 3D display screen to display a test picture; the test picture and the naked eye 3D display screen have the same length-width ratio, the center of the test picture is overlapped with the center of the naked eye 3D display screen, and the test picture covers part of the naked eye 3D display screen; the test picture is in the visual angle range of the camera;
acquiring the test picture displayed by the naked eye 3D display screen by using the camera;
and calculating the image offset parameter of the naked eye 3D display screen according to the test image acquired by the camera.
Optionally, the calculating a picture offset parameter of the naked eye 3D display screen according to the test picture acquired by the camera includes:
fitting a central demarcation line segment displayed in a 3D mode according to the test picture acquired by the camera;
and comparing the central boundary line segment of the 3D display with a standard boundary line, and calculating the picture offset parameter of the naked eye 3D display screen.
Optionally, before the setting of the naked eye 3D display screen to display a test picture, the method further includes:
and judging whether the naked eye 3D display screen is completely positioned in the visual angle of the camera, if so, executing the operation of setting the naked eye 3D display screen to display a test picture.
Optionally, before the setting of the naked eye 3D display screen to display a test picture, the method further includes:
and judging whether the naked eye 3D display screen is located in the visual angle of the camera or not, if not, reducing the test picture with the equal length-width ratio until the test picture is located in the visual angle range of the camera.
Optionally, the scaling ratio of the test picture to the naked eye 3D display screen is smaller than
D is the length of the long edge of the naked eye 3D display screen, H is the optimal visual distance of the naked eye 3D display screen, L is the eye distance, and theta is the visual angle of the camera.
Optionally, the moving the camera to the optimal viewpoint position of the naked eye 3D display screen includes:
moving the camera to an optimal camera plane corresponding to the optimal sight distance of the naked eye 3D display screen;
and adjusting the position of the camera in the optimal camera plane to enable the projection of the center of the camera on the plane where the naked eye 3D display screen is located to coincide with the center of the naked eye 3D display screen.
Optionally, the standard boundary line is a cross hair located at the center of the camera.
Optionally, the fitting a center demarcation line segment for 3D display according to the test picture collected by the camera includes:
extracting pixels of a preset area in a color overlapping area in the test picture acquired by the camera; the test picture acquired by the camera is an overlapped picture with single color in left and right views, and a color overlapped area is formed between the left view and the right view;
and fitting the central boundary line segment of the 3D display according to the pixels of the preset area.
Optionally, the preset region includes a region of preset rows, preset columns, preset interlaced lines, or preset spaced columns.
Optionally, the picture offset parameter includes a center offset parameter and an angle offset parameter.
In a second aspect, an embodiment of the present invention further provides a device for testing a naked eye 3D display screen, including:
the optimal viewpoint position determining module is used for moving the camera to the optimal viewpoint position of the naked eye 3D display screen;
the test picture setting module is used for setting the naked eye 3D display screen to display a test picture;
the acquisition module is used for acquiring the test picture displayed by the naked eye 3D display screen by using the camera;
and the calculation module is used for calculating the image offset parameters of the naked eye 3D display screen according to the test image acquired by the camera.
Optionally, the glasses further comprise a judging module, and the judging module is used for judging whether the naked eye 3D display screen is completely positioned in the visual angle of the camera.
Optionally, the method further includes a scaling module, where the scaling module is configured to, when the determination module determines that the naked-eye 3D display screen is not located in the viewing angle of the camera, scale down the test picture with a long-to-short ratio until the test picture is located in the viewing angle range of the camera.
According to the invention, the camera is moved to the optimal viewpoint position of the naked eye 3D display screen, then the naked eye 3D display screen is arranged to display the test picture, the test picture covers part of the naked eye 3D display screen, the length-width ratio of the test picture is the same as that of the naked eye 3D display screen, the center of the test picture is overlapped, the test picture is ensured to be in the visual angle range of the camera, the test picture is collected by the camera, and the picture offset parameter of the naked eye 3D display screen is calculated through the test picture, so that the problem that when the optimal visual distance of the naked eye 3D display screen is lower, all test pictures cannot be collected due to smaller visual angle of the camera, so that a tester cannot accurately align the center of the camera with the center of the naked eye 3D display screen, and then carries out detection is solved, and expensive wide-angle cameras are not required to be purchased when the detection of. The method for testing the naked eye 3D display screen can meet the testing requirement when the optimal visual distance of the naked eye 3D display screen is lower, realizes the testing of the naked eye 3D display screen under the condition of different visual distances, improves the testing efficiency and saves the testing cost.
Drawings
Fig. 1 is a flowchart of a method for testing a naked eye 3D display screen according to a first embodiment of the present invention;
fig. 2 is a schematic structural diagram of a physical structure of the naked-eye 3D display screen testing device according to the first embodiment of the present invention;
fig. 3 is a schematic diagram of an optimal viewpoint position of a camera according to an embodiment of the present invention;
fig. 4 is a schematic diagram of a test picture acquired by a camera according to an embodiment of the present invention;
fig. 5 is a flowchart of a method for testing a naked eye 3D display screen according to a second embodiment of the present invention;
fig. 6 is a schematic diagram of a positional relationship between a test picture and a camera according to a second embodiment of the present invention;
fig. 7 is a schematic structural diagram of a testing device for a naked eye 3D display screen according to a third embodiment of the present invention;
fig. 8 is a schematic structural diagram of another naked eye 3D display screen testing device according to a third embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
Example one
Fig. 1 is a flowchart of a method for testing a naked eye 3D display screen according to a first embodiment of the present invention, and fig. 2 is a schematic diagram of a physical structure of a device for testing a naked eye 3D display screen according to a first embodiment of the present invention, and with reference to fig. 1 and fig. 2, the method includes:
s110, moving the camera 10 to the optimal viewpoint position of the naked eye 3D display screen 11;
for the naked eye 3D display screen 11, in the viewing process, the human eyes are required to be placed at the central position of the optimal visual range, so that different views in the display screen can be ensured to enter the left eye and the right eye through the refraction of light, and a better 3D effect is realized; fig. 3 is a schematic diagram of an optimal viewpoint position of a camera according to an embodiment of the present invention, referring to fig. 3, in a testing process, it is also necessary to place the camera 10 for collecting a picture of a naked-eye 3D display screen 11 at the optimal viewpoint position of the camera 10 corresponding to the optimal viewing distance of human eyes, that is, at an intersection point position of two light rays as shown in the figure, so that the camera 10 can collect views corresponding to left and right eyes. Although the position of the camera 10 shown in fig. 3 only shows a side view structure diagram of one viewing angle, the structure diagrams obtained at different lateral viewing angles can be all shown in fig. 3, so that, at the optimal viewpoint position, the center of the projected image of the camera 10 on the naked eye 3D display screen 11 coincides with the center of the naked eye 3D display screen 11, and the center line position of the naked eye 3D display screen 11 also coincides with the center line of the camera 10, so that the center and the center line of the naked eye 3D display screen can be replaced by the center and the center line of the camera 10 to be used as the standard center and the standard center line.
S120, setting a naked eye 3D display screen to display a test picture; the test picture and the naked eye 3D display screen have the same length-width ratio, the center of the test picture is overlapped with the center of the naked eye 3D display screen, and the test picture covers part of the naked eye 3D display screen; the test picture is in the visual angle range of the camera;
the test picture is a 3D display picture, that is, the test picture includes two views corresponding to the left and right eyes, the naked eye 3D display screen 11 refracts light from the two views and focuses the light on the left and right eyes, respectively, and unlike the human eyes, the camera 10 for testing can only acquire a two-dimensional image at an optimal viewpoint position. And for the naked eye 3D display screen 11 with a low optimal viewing distance, when the viewing angle of the camera 10 is small, the test picture in the full screen state cannot be collected, at this time, the test picture can be reduced in an equal proportion to be displayed, the test picture is reduced by the center of the test picture in the full screen state until all the test pictures are within the viewing angle range of the camera 10, and the reduced test picture should be equal to the length-width ratio of the naked eye 3D display screen 11.
S130, collecting a test picture displayed by a naked eye 3D display screen by using a camera;
in the acquisition process of the camera 10, light of a test picture is generally sensed by a Charge Coupled Device (CCD) therein, an optical signal in a two-dimensional plane is converted into an electrical signal, and then the electrical signal is converted into a picture pixel value to form an image of the test picture.
S140, calculating picture offset parameters of the naked eye 3D display screen according to the test pictures collected by the camera.
The center and the center line of the test picture can be calculated through the obtained test picture, and the offset parameter of the test picture can be obtained by comparing the center and the center line of the test picture with the center and the center line of the camera 10.
The method for testing the naked eye 3D display screen provided by the embodiment of the invention moves the camera to the optimal viewpoint position of the naked eye 3D display screen, then setting a naked eye 3D display screen to display a test picture, covering a part of the naked eye 3D display screen on the test picture, has the same length-width ratio with a naked eye 3D display screen and the center is superposed, and ensures that the test picture is in the visual angle range of the camera, then a test picture is collected by the camera, picture offset parameters of the naked eye 3D display screen are calculated through the test picture, can solve the problem that when the optimal visual distance of the naked eye 3D display screen is lower, the visual angle of the camera is smaller, so that all test pictures can not be acquired, make the tester can't be accurate with camera center and bore hole 3D display screen center counterpoint, then carry out the problem that detects, also need not to purchase expensive wide-angle camera when carrying out the detection of the bore hole 3D display screen that the best visual angle is lower. The method for testing the naked eye 3D display screen provided by the embodiment of the invention can meet the testing requirement when the optimal visual distance of the naked eye 3D display screen is lower, realizes the testing of the naked eye 3D display screen under the condition of different visual distances, improves the testing efficiency and saves the testing cost.
And performing comparison calculation according to the center and the central line of the test picture and the center and the central line of the camera, wherein the obtained offset parameters of the test picture comprise a center offset parameter and an angle offset parameter. Specifically, when the step 140 is performed, and the picture offset parameter of the naked eye 3D display screen is calculated according to the test picture acquired by the camera, the method may include:
s141, fitting a central demarcation line segment displayed in a 3D mode according to a test picture acquired by a camera;
the two-dimensional image is a two-dimensional image of the two views at the optimal viewpoint position, obviously, a boundary of 3D display exists in the two-dimensional image, the boundary is a central line of the test picture, and for the two-dimensional image, a central line segment, namely a central demarcation line segment, located on the boundary can be obtained through collecting pixel values and processing the image, and the central demarcation line segment contains central position information and central line angle information of the test picture.
And S142, comparing the central demarcation line segment displayed in the 3D mode with the standard demarcation mark, and calculating the picture offset parameter of the naked eye 3D display screen.
The standard demarcation mark includes central position information of the camera and angle information of a central line, and specifically, the standard demarcation mark may be a cross wire or a cross line arranged at the center of the camera. By comparing the central demarcation line segment fitted by the test picture with the cross wire or the cross line, the central offset distance and the offset angle of the central demarcation line segment and the cross wire can be calculated, namely the central offset and the angle offset of the test picture.
Further, fig. 4 is a schematic diagram of a test picture acquired by a camera according to an embodiment of the present invention, and referring to fig. 4, a two-dimensional image acquired by the camera is actually a left view and a right view with an overlapping area, where the left view and the right view are determined by a specific test picture, and for this, the step 141 of fitting a central boundary line segment of a 3D display according to the test picture acquired by the camera may include:
s1411, extracting pixels of a preset area of a color overlapping area in a test picture acquired by a camera; the test picture acquired by the camera is an overlapped picture with a left view and a right view being single colors, and a color overlapped area is arranged between the left view and the right view;
the color overlapping area is an area generated by transversely overlapping left and right views in the test picture, the left and right views can be set to be two monochromatic views with different colors, illustratively, the test picture can be set to be two monochromatic views with left red and right blue, and the overlapping area is a color mixed by red and blue.
And S1412, fitting the central boundary line segment of the 3D display according to the pixels of the preset area.
The step of fitting the central boundary line segment for 3D display includes that the overlapping region is located in the middle region of the left view and the right view, so that the center and the center line of the overlapping region are the center and the center line of the test picture, and the central boundary line segment for 3D display is fitted by using part of pixels of the overlapping region, so that the complexity of image processing is reduced and the fitting efficiency is improved under the condition that the fitting result of the center and the center line is not changed.
Optionally, the preset region includes a region of preset rows, preset columns, preset interlaced lines, or preset spaced columns. For example, a pixel region of a preset row may be extracted, for example, pixels adjacent to five rows are extracted from the overlapping region, a central line segment is fitted according to the position information of the 5 rows of pixels, and the central offset and the angle offset of the test picture may be obtained by comparing the central line segment with the cross of the camera. Alternatively, interlaced pixel regions may be extracted, for example, five rows of pixels are extracted, and one row of pixels is separated between the five rows of pixels, so that a central boundary line segment is fitted according to the position information of the separated five rows of pixels. Similarly, a certain number of column pixels may be extracted for fitting the central boundary line segment, which is not described herein again.
Example two
The second embodiment of the present invention further provides a method for testing a naked eye 3D display screen, fig. 5 is a flowchart of a method for testing a naked eye 3D display screen provided by the second embodiment of the present invention, and referring to fig. 5, the method for testing includes:
s211, moving the camera to an optimal camera plane corresponding to the optimal visual range of the naked eye 3D display screen;
referring to fig. 3, the naked eye 3D display screen has an optimal viewing distance for the left and right eyes of a person, and in order to ensure that the camera 10 collects pictures in the same visual direction, the camera 10 needs to be correspondingly placed at an optimal viewpoint position, and first, the distance between the camera 10 and the naked eye 3D display screen needs to be adjusted, that is, the camera is moved to the optimal camera plane.
S212, adjusting the position of the camera in the optimal camera plane to enable the projection of the center of the camera on the plane where the naked eye 3D display screen is located to be overlapped with the center of the naked eye 3D display screen;
in the best camera plane, the distance between the camera and the naked eye 3D display screen can be guaranteed to be the best distance, and the camera and the center of the naked eye 3D display screen are further required to be guaranteed to be aligned, so that the center and the center line on the camera can be used as a standard center and a standard center line in the following process.
S220, judging whether the naked eye 3D display screen is located in the visual angle of the camera or not;
fig. 6 is a schematic diagram of a position relationship between a test picture and a camera provided in the second embodiment of the present invention, and referring to fig. 6, for a naked eye 3D display screen with an optimal viewing distance of h, it is obvious that the camera at the first position can just collect a full-screen test picture of the naked eye 3D display screen; if the optimal visual distance is larger than h, the position of the camera needs to be adjusted upwards, and the coverage range of the corresponding visual angle theta is larger than that of the naked eye 3D display screen, so that the requirement of collecting a full-screen test picture can be met; and when the optimal visual distance of the naked eye 3D display screen is smaller than h, the test picture obviously needs to be zoomed so as to ensure that the test picture is completely covered by the visual angle of the camera, namely the test picture on the 3D display screen is in the visual angle range of the camera.
S230, setting a naked eye 3D display screen to display a test picture; the test picture and the naked eye 3D display screen have the same length-width ratio, the center of the test picture is overlapped with the center of the naked eye 3D display screen, and the test picture covers part of the naked eye 3D display screen; the test picture is in the visual angle range of the camera;
when it is determined in step 220 that the naked eye 3D display screen is located within the viewing angle of the camera, the 3D display screen may be driven to directly display a full-screen test picture, where the test picture is located within the viewing angle of the camera; in step 220, when it is determined that the naked eye 3D display screen is not located within the viewing angle of the camera, the length-to-width ratio can be reduced to reduce the test picture so that the test picture is located within the viewing angle range of the camera.
S240, collecting a test picture displayed by a naked eye 3D display screen by using a camera;
and S250, calculating picture offset parameters of the naked eye 3D display screen according to the test picture collected by the camera.
The method for testing the naked eye 3D display screen provided by the embodiment of the invention comprises the steps of moving the camera to the optimal viewpoint position of the naked eye 3D display screen, judging whether the naked eye 3D display screen can be completely positioned in the camera, setting the naked eye 3D display screen to display a test picture, enabling the test picture to cover a part of the naked eye 3D display screen, have the same length-width ratio and the same center as the naked eye 3D display screen, ensure that the test picture is positioned in the visual angle range of the camera, further collecting the test picture through the camera, calculating the picture offset parameter of the naked eye 3D display screen through the test picture, solving the problem that when the optimal visual distance of the naked eye 3D display screen is lower, the camera cannot collect all the test pictures due to the smaller visual angle, so that a tester cannot accurately align the center of the camera with the naked eye 3D display screen and then perform detection, and an expensive wide-angle camera does not need to be purchased when the detection of the naked eye 3D display screen with the lower optimal visual range is carried out. The method for testing the naked eye 3D display screen provided by the embodiment of the invention can meet the testing requirement when the optimal visual distance of the naked eye 3D display screen is lower, realizes the testing of the naked eye 3D display screen under the condition of different visual distances, improves the testing efficiency and saves the testing cost.
For different naked eye 3D display screens, due to optical design, process and other problems, although the naked eye 3D display screens have the same size, the optimal visual distances of the naked eye 3D display screens are different. For naked eye 3D display screens with different optimal viewing distances, fig. 6 shows two optimal viewpoint positions of a camera, the camera 10 has a fixed viewing angle θ, wherein the range of the viewing angle θ of the camera at the first position just covers the long-side length D of the naked eye 3D display screen, at this time, if the optimal viewing distance of the naked eye 3D display screen is H, the camera 10 just can collect a full-screen test picture of the naked eye 3D display screen, and when the optimal viewing distance of the naked eye 3D display screen is lower than H, it is obvious that the viewing angle of the corresponding camera needs to be larger than θ, and the test picture of the naked eye 3D display screen is reduced to the test long-side length D, the corresponding camera is located at the second position, and at this time, the test picture can be completely collected, and corresponds to the optimal viewing distance H of the naked eye 3D display screen. Obviously, for a naked eye 3D display screen with the optimal visual range of H, only when the length of the long edge of a test picture is smaller than D, the test picture can be completely collected by a camera with the visual angle theta, wherein a mathematical relationship exists
Wherein L is the interpupillary distance of human eyes, about 60cm, thereby obtaining
Alternatively, the test picture should be scaled less than
Therefore, the reduced test picture can be ensured to be positioned in the visual angle of the camera, and the center and the central line of the reduced test picture can be calculated conveniently.
EXAMPLE III
The third embodiment of the present invention provides a testing apparatus for a naked eye 3D display screen, fig. 7 is a schematic structural diagram of the testing apparatus for the naked eye 3D display screen provided by the third embodiment of the present invention, and referring to fig. 7, the testing apparatus includes: the optimal viewpoint position determining module is used for moving the camera to the optimal viewpoint position of the naked eye 3D display screen; the test picture setting module is used for setting a naked eye 3D display screen to display a test picture; the acquisition module is used for acquiring a test picture displayed by the naked eye 3D display screen by using the camera; and the calculation module is used for calculating the image offset parameters of the naked eye 3D display screen according to the test images collected by the camera.
The best viewpoint position determining module in the testing device can be a simple mechanical structure, and position adjustment is performed in a manual mode, so that the camera is guaranteed to move to the best viewpoint position, the motor can also be controlled by a driving program, the motor moves the mechanical structure to enable the camera to move to the best viewpoint position, the best viewpoint position can acquire a testing picture through the camera and display the testing picture on the display screen in real time to serve as visual feedback, and a user determines that the camera moves to the best viewpoint position. In addition, the optimal viewpoint determining module, the test picture setting module, the collecting module and the calculating module can be integrated in a driving program or test software, so that the naked eye 3D display screen can be conveniently measured.
The testing device of the naked eye 3D display screen provided by the third embodiment of the invention moves the camera to the optimal viewpoint position of the naked eye 3D display screen through the optimal viewpoint determining module, then the testing picture setting module sets the naked eye 3D display screen to display the testing picture, so that the testing picture covers part of the naked eye 3D display screen, has the same length-width ratio and the same center as the naked eye 3D display screen, and ensures that the testing picture is in the visual angle range of the camera, the testing picture is collected through the collecting module, the picture offset parameter of the testing picture of the naked eye 3D display screen is calculated through the calculating module, the problem that when the optimal visual distance of the naked eye 3D display screen is lower, all the testing pictures cannot be collected due to the smaller visual angle of the camera, so that a tester cannot accurately align the center of the camera with the center of the naked eye 3D display screen, and then performs detection can be solved, and an expensive wide-angle camera does not need to be purchased when the detection of the naked eye 3D display screen with the lower optimal visual range is carried out. The method for testing the naked eye 3D display screen provided by the embodiment of the invention can meet the testing requirement when the optimal visual distance of the naked eye 3D display screen is lower, realizes the testing of the naked eye 3D display screen under the condition of different visual distances, improves the testing efficiency and saves the testing cost.
Fig. 8 is a schematic structural diagram of another testing device for a naked eye 3D display screen according to a third embodiment of the present invention, and referring to fig. 8, the testing device for a naked eye 3D display screen further includes a determining module, where the determining module is configured to determine whether all the naked eye 3D display screen is located within a viewing angle of a camera.
When the judgment module judges that the naked eye 3D display screen is completely positioned in the visual angle of the camera, the test picture setting module can directly display the test picture, and at the moment, the test picture is positioned in the visual angle range of the camera and can be effectively collected by the collection module.
Further, referring to fig. 8, the testing device for the naked eye 3D display screen further includes a scaling module, where the scaling module is configured to, when the determining module determines that the naked eye 3D display screen is not located in the viewing angle of the camera, scale down the test picture with an equal length-to-width ratio until the test picture is located in the viewing angle range of the camera, so as to meet the requirement that the collecting module effectively collects all the test pictures, and then the calculating module obtains the picture offset parameter of the naked eye 3D display screen.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. 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, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (13)
1. The testing method of the naked eye 3D display screen is characterized by comprising the following steps:
moving the camera to the optimal viewpoint position of the naked eye 3D display screen;
setting the naked eye 3D display screen to display a test picture; the test picture and the naked eye 3D display screen have the same length-width ratio, the center of the test picture is overlapped with the center of the naked eye 3D display screen, and the test picture covers part of the naked eye 3D display screen; the test picture is in the visual angle range of the camera;
acquiring the test picture displayed by the naked eye 3D display screen by using the camera;
and calculating the image offset parameter of the naked eye 3D display screen according to the test image acquired by the camera.
2. The testing method according to claim 1, wherein the calculating of the frame offset parameter of the naked-eye 3D display screen according to the test frame acquired by the camera comprises:
fitting a central demarcation line segment displayed in a 3D mode according to the test picture acquired by the camera;
and comparing the central boundary line segment of the 3D display with a standard boundary line, and calculating the picture offset parameter of the naked eye 3D display screen.
3. The testing method according to claim 1, wherein before the setting of the naked-eye 3D display screen to display the testing picture, the method further comprises:
and judging whether the naked eye 3D display screen is completely positioned in the visual angle of the camera, if so, executing the operation of setting the naked eye 3D display screen to display a test picture.
4. The testing method according to claim 1, wherein before the setting of the naked-eye 3D display screen to display the testing picture, the method further comprises:
and judging whether the naked eye 3D display screen is located in the visual angle of the camera or not, if not, reducing the test picture with the equal length-width ratio until the test picture is located in the visual angle range of the camera.
5. The test method according to claim 1, wherein the ratio of the test picture to the naked-eye 3D display screen is smaller than
D is the length of the long edge of the naked eye 3D display screen, H is the optimal visual distance of the naked eye 3D display screen, L is the eye distance, and theta is the visual angle of the camera.
6. The testing method according to claim 1, wherein the moving the camera to the optimal viewpoint position of the naked eye 3D display screen comprises:
moving the camera to an optimal camera plane corresponding to the optimal sight distance of the naked eye 3D display screen;
and adjusting the position of the camera in the optimal camera plane to enable the projection of the center of the camera on the plane where the naked eye 3D display screen is located to coincide with the center of the naked eye 3D display screen.
7. The method of claim 2, wherein the standard demarcation line is a cross hair centered on the camera.
8. The method according to claim 2, wherein the fitting a center boundary line segment of a 3D display according to the test picture collected by the camera comprises:
extracting pixels of a preset area in a color overlapping area in the test picture acquired by the camera; the test picture acquired by the camera is an overlapped picture with single color in left and right views, and a color overlapped area is formed between the left view and the right view;
and fitting the central boundary line segment of the 3D display according to the pixels of the preset area.
9. The method according to claim 8, wherein the predetermined area comprises an area of predetermined rows, predetermined columns, predetermined interlaced lines, or predetermined spaced columns.
10. The testing method of claim 1, wherein the frame offset parameters comprise a center offset parameter and an angle offset parameter.
11. The utility model provides a bore hole 3D display screen's testing arrangement which characterized in that includes:
the optimal viewpoint position determining module is used for moving the camera to the optimal viewpoint position of the naked eye 3D display screen;
the test picture setting module is used for setting the naked eye 3D display screen to display a test picture;
the test picture and the naked eye 3D display screen have the same length-width ratio, the center of the test picture is overlapped with the center of the naked eye 3D display screen, and the test picture covers part of the naked eye 3D display screen; the test picture is in the visual angle range of the camera;
the acquisition module is used for acquiring the test picture displayed by the naked eye 3D display screen by using the camera;
and the calculation module is used for calculating the image offset parameters of the naked eye 3D display screen according to the test image acquired by the camera.
12. The device for testing the naked eye 3D display screen according to claim 11, further comprising a judging module, wherein the judging module is used for judging whether the naked eye 3D display screen is completely positioned in the visual angle of the camera.
13. The apparatus according to claim 12, further comprising a scaling module, where the scaling module is configured to reduce the test picture to a length-to-width ratio until the test picture is within a viewing angle range of the camera when the determination module determines that the naked eye 3D display screen is not entirely within the viewing angle range of the camera.
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