CN112130325B - Parallax correction system and method for vehicle-mounted head-up display, storage medium and electronic device - Google Patents

Parallax correction system and method for vehicle-mounted head-up display, storage medium and electronic device Download PDF

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CN112130325B
CN112130325B CN202011025199.5A CN202011025199A CN112130325B CN 112130325 B CN112130325 B CN 112130325B CN 202011025199 A CN202011025199 A CN 202011025199A CN 112130325 B CN112130325 B CN 112130325B
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image
view
preset
content pixel
virtual image
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CN112130325A (en
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李晓健
郑丽
陈小康
农云飞
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Dongfeng Motor Co Ltd
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Dongfeng Motor Co Ltd
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    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/01Head-up displays
    • G02B27/0101Head-up displays characterised by optical features
    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/01Head-up displays
    • G02B27/0101Head-up displays characterised by optical features
    • G02B2027/0132Head-up displays characterised by optical features comprising binocular systems
    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/01Head-up displays
    • G02B27/0101Head-up displays characterised by optical features
    • G02B2027/014Head-up displays characterised by optical features comprising information/image processing systems

Abstract

The invention provides a parallax correction system, a method and a storage medium of a vehicle-mounted head-up display, wherein images formed by odd-numbered columns and even-numbered columns of pixel points of an image generator are separated by an array columnar lens film and then respectively enter the left eye and the right eye of a driver, the position offset of each content pixel point in a virtual image formed by the left eye of the driver watching a windshield glass reflection image and a virtual image formed by the right eye watching the windshield glass reflection image is obtained by simulating the parallax generated by the left eye and the right eye of the driver when observing the windshield glass reflection projection image in advance, the images formed by the odd-numbered columns and the even-numbered columns in the content pixel points are moved in advance to enable the two images to have opposite preset offset values, so that the preset offset values can be offset when the virtual image formed by the subsequent left eye and the right eye have the position offset, and the effect of the virtual images formed by the left eye and the right eye are superposed is realized, and the VAC conflict of the vehicle-mounted HUD is relieved, and the dizzy feeling of the driver is eliminated as much as possible.

Description

Parallax correction system and method for vehicle-mounted head-up display, storage medium and electronic device
Technical Field
The invention relates to the technical field of automobile intelligent control, in particular to a parallax correction system and method for a vehicle-mounted head-up display, a storage medium and electronic equipment.
Background
At present, many vehicles are equipped with a vehicle-mounted HUD (head up display), as shown in fig. 1 and fig. 2, the vehicle-mounted HUD includes an image generator 1, a projection plane of the image generator 1 projects an image onto a windshield and then reflects the image onto human eyes for imaging, a schematic diagram of a position point 2 on the image generator 1 after being amplified (a part in a circle includes the position point 2, and the position point 2 includes a plurality of pixel points) is as shown in fig. 2, and two light beams passing through the same position point 2 are reflected by the windshield 3 and then respectively enter a left eye 7 and a right eye 6 of a driver along a first light path 4 and a second light path 5. Since the shape of the windscreen is irregular, the reflection imaging is not ideal, resulting in the images seen by the left and right eyes respectively being perceived from the positions of the virtual image point 9 and the virtual image point 8. The information of the same location point 2 on the image generator 1 appears to the driver as separate virtual image points 9 and 8. A similar principle is applied to all the pixel points on the image generator 1, and the driver sees two separate images due to non-ideal imaging, resulting in a so-called VAC (convergence of vision) conflict as shown in fig. 3, and the driver feels dizzy when viewing the image displayed on the HUD on the windshield.
Disclosure of Invention
The invention aims to provide a parallax correction system, method, storage medium and electronic equipment for a vehicle-mounted head-up display, so as to relieve VAC conflict of a vehicle-mounted HUD in the prior art and eliminate dizzy feeling of a driver as much as possible.
To this end, a part of embodiments of the present invention provide a parallax correction system for a vehicle-mounted head-up display, including:
an array lenticular lens film disposed on a screen of the image generator; the array columnar lens film is used for refracting light rays emitted by each group of adjacent odd-numbered rows of screen pixel points and even-numbered rows of screen pixel points on the image generator into a first path of light rays and a second path of light rays, the first path of light rays are transmitted along a left light path after being reflected by the windshield glass, and the second path of light rays are transmitted along a right light path after being reflected by the windshield glass; the left light path passes through a preset left eye position, and the right light path passes through a preset right eye position;
the image processor is used for extracting an image formed by odd-column content pixel points in the projected image generated by the image generator as a first image and extracting an image formed by even-column content pixel points in the projected image as a second image; moving the first image to enable the position of a content pixel point of the first image in the screen to generate a first preset deviation value; moving the second image to enable the position of the content pixel point of the second image in the screen to generate a second preset deviation value; the first preset offset value offsets the actual offset value generated when the first image is reflected off the windshield and the second preset offset value offsets the actual offset value generated when the second image is reflected off the windshield.
Optionally, in the parallax correction system of the vehicle-mounted head-up display, the first preset offset value and the second preset offset value are obtained as follows:
the image generator generates a left-view test image only containing odd-numbered columns of content pixel points, and obtains a projection image of the left-view test image at a windshield virtual image field, which is obtained by presetting a left-eye position, as a left-view virtual image; setting the left-view test image at the virtual image field of the windshield glass, and acquiring a left-view test image result obtained at the preset left-eye position as a left-view target image;
the image generator generates a right-view test image only containing even-numbered rows of content pixel points, and obtains a projected image of the right-view test image at a windshield virtual image field, which is obtained at the preset right eye position, as a right-view virtual image; setting the right-view test image at the virtual image field of the windshield glass, and acquiring a right-view test image result obtained at the preset right eye position as a right-view target image;
the image processor acquires the left-view virtual image, the right-view virtual image, the left-view target image and the right-view target image, and obtains the first preset offset value according to an offset value between content pixel points of the left-view target image and content pixel points of the left-view virtual image; and obtaining the second preset offset value according to the offset value between the content pixel point of the right-view target image and the content pixel point of the right-view virtual image.
Optionally, in the parallax correction system of the vehicle-mounted head-up display, the image processor obtains the first preset offset value and the second preset offset value by:
adjusting the left test view: obtaining a first adjustment quantity of content pixel points of a left-view test image according to an offset value between the content pixel points of the left-view target image and the content pixel points of the left-view virtual image; moving the left-view test view according to the first adjustment quantity to obtain an updated left-side test view;
and (3) circularly adjusting the left test view: after the left side test view is updated, the left view virtual image is obtained again; if the deviation value between the content pixel point of the left-view target image and the content pixel point of the left-view virtual image is smaller than a preset threshold value, taking the first adjustment amount as the first preset deviation value, otherwise, repeating the left-side test view adjustment step until the deviation value between the content pixel point of the left-view target image and the content pixel point of the left-view virtual image is smaller than the preset threshold value;
and adjusting the right test view: obtaining a second adjustment quantity of content pixel points of a right-view test image according to an offset value between the content pixel points of the right-view target image and the content pixel points of the right-view virtual image; moving the right-view test view according to the second adjustment quantity to obtain an updated right-view test view;
and (3) circularly adjusting the right test view: after the right side test view is updated, the right view virtual image is obtained again; if the deviation value between the content pixel point of the right-view target image and the content pixel point of the right-view virtual image is smaller than a preset threshold value, taking the second adjustment amount as a second preset deviation value, otherwise, repeating the right-side test view adjustment step until the deviation value between the content pixel point of the right-view target image and the content pixel point of the right-view virtual image is smaller than the preset threshold value;
the first preset deviation value is obtained after the first regulation quantity obtained in the step of regulating the left side test view and the step of circularly regulating each left side test view is measured and summed; and summing the second adjustment values obtained in the right side test view adjustment step and each right side test view cyclic adjustment step to obtain the second preset deviation value.
Optionally, the parallax correction system for a vehicle-mounted head-up display further includes:
the left-view camera is arranged at the preset left-eye position; the left-view camera shoots a projection image of the left-view test image at the virtual image field of the windshield glass to obtain a left-view virtual image; the left-view camera shoots a left-view test image at the virtual image field of the windshield glass to obtain a left-view target image;
the right-view camera is arranged at the preset right eye position; the right-view camera shoots a projection image of the right-view test image at the windshield virtual image field to obtain a right-view virtual image; and the right-view camera shoots a right-view test image at the virtual image field of the windshield glass to obtain the right-view target image.
Optionally, the parallax correction system for a vehicle-mounted head-up display further includes:
the target image generator is arranged at the virtual image field of the windshield glass and is used for generating the left-view test image or the right-view test image;
when the target image generator generates the left-view test image, the left-view camera shoots a screen of the target image generator to obtain a left-view target image;
and when the target image generator generates the right-view test image, the right-view camera shoots the screen of the target image generator to obtain the right-view target image.
Optionally, in the above vehicle-mounted head-up display parallax correction system, the thickness T _ len of the array lenticular lens film, the focal length F _ len of the lenticular lens, the radius R _ len of the lenticular lens, and the distance D _ len between central axes of adjacent lenticular lenses are obtained as follows:
T_len=F_len=R_len/(n-1)=(VID×D_pixel)/(Q×B);
D_len=2×D_pixel×(VID-T_len×B^2)/VID;
wherein n is the refracting index of lenticular lens, and Q is for predetermineeing the binocular through-hole interval, and VID is on-vehicle new line display's virtual image width, and B is on-vehicle new line display's horizontal magnification, and D _ pixel is the distance between two adjacent columns of pixel points in the image generator.
Optionally, the parallax correction system of the vehicle-mounted heads-up display further includes an eye tracking module:
the image processor is used for pre-storing a plurality of groups of correction parameters, wherein different groups of correction parameters comprise different preset left eye positions and preset right eye positions, and first preset deviation values and second preset deviation values corresponding to the preset left eye positions and the preset right eye positions;
the human eye tracking module monitors the left eye position and the right eye position of the driver in real time and sends the monitoring result to the image processor;
and the image processor searches for matched correction parameters according to the left eye position and the right eye position so as to determine a first preset deviation value and a second preset deviation value which are matched with the left eye position and the right eye position.
The invention also provides a parallax correction method of the vehicle-mounted head-up display, which comprises the following steps:
acquiring a projection image generated by an image generator;
extracting images formed by odd-numbered columns of content pixel points in the projected image as first images, and extracting images formed by even-numbered columns of content pixel points in the projected image as second images;
moving the first image to enable the position of a content pixel point of the first image in a screen of the image generator to generate a first preset deviation value; moving the second image to enable the position of the content pixel point of the second image in the screen to generate a second preset deviation value; the first preset offset value offsets the actual offset value generated when the first image is reflected off the windshield and the second preset offset value offsets the actual offset value generated when the second image is reflected off the windshield.
Optionally, the parallax correction method for the vehicle-mounted head-up display further includes a step of obtaining the first preset offset value and the second preset offset value, and specifically includes:
acquiring a projection image of the left-view test image at the windshield virtual image field, which is obtained from the preset left eye position, as a left-view virtual image; the left-view test image is an image which is generated by an image generator and only contains odd-numbered rows of content pixel points;
setting the left-view test image at the virtual image field of the windshield glass, and acquiring a left-view test image result obtained at the preset left-eye position as a left-view target image;
acquiring a projection image of the right-view test image at the windshield virtual image field, which is obtained from the preset right eye position, as a right-view virtual image; the right-view test image is an image which is generated by the image generator and only contains even-numbered rows of content pixel points;
setting the right-view test image at the virtual image field of the windshield glass, and acquiring a right-view test image result obtained at the preset right eye position as a right-view target image;
obtaining the first preset offset value according to the offset value between the content pixel point of the left-view target image and the content pixel point of the left-view virtual image; and obtaining the second preset offset value according to the offset value between the content pixel point of the right-view target image and the content pixel point of the right-view virtual image.
Optionally, in the parallax correction method for a vehicle-mounted head-up display, the step of obtaining the first preset offset value and the second preset offset value includes:
the left-view virtual image is obtained by shooting a projection image of the left-view test image at the position of the windshield virtual image field by a left-view camera arranged at the preset left-eye position; the left-view target image is obtained by shooting a left-view test image arranged at a virtual image field of the windshield glass by the left-view camera;
the right-view virtual image is obtained by shooting a projection image of the right-view test image at the virtual image field of the windshield glass by a right-view camera arranged at the preset right eye position; and the right-view target image is obtained by shooting a right-view test image arranged at the virtual image field of the windshield by the right-view camera.
Optionally, the step of obtaining the first preset offset value and the second preset offset value by the parallax correction method for the vehicle-mounted head-up display specifically includes:
adjusting the left test view: obtaining a first adjustment quantity of content pixel points of a left-view test image according to an offset value between the content pixel points of the left-view target image and the content pixel points of the left-view virtual image; moving the left-view test view according to the first adjustment quantity to obtain an updated left-view test view;
and (3) circularly adjusting the left test view: after the left side test view is updated, the left view virtual image is obtained again; if the deviation value between the content pixel point of the left-view target image and the content pixel point of the left-view virtual image is smaller than a preset threshold value, taking the first adjustment amount as the first preset deviation value, otherwise, repeating the left-side test view adjustment step until the deviation value between the content pixel point of the left-view target image and the content pixel point of the left-view virtual image is smaller than the preset threshold value;
adjusting the right test view: obtaining a second adjustment quantity of content pixel points of a right-view test image according to an offset value between the content pixel points of the right-view target image and the content pixel points of the right-view virtual image; moving the right-view test view according to the second adjustment quantity to obtain an updated right-view test view;
and (3) circularly adjusting the right test view: after the right side test view is updated, the right virtual image is obtained again; if the deviation value between the content pixel point of the right-view target image and the content pixel point of the right-view virtual image is smaller than a preset threshold value, taking the second adjustment amount as a second preset deviation value, otherwise, repeating the right-side test view adjustment step until the deviation value between the content pixel point of the right-view target image and the content pixel point of the right-view virtual image is smaller than the preset threshold value;
the first preset deviation value is obtained after the first regulation quantity obtained in the step of regulating the left side test view and the step of circularly regulating each left side test view is measured and summed; and summing the second adjustment values obtained in the right side test view adjustment step and each right side test view cyclic adjustment step to obtain the second preset deviation value.
Optionally, the parallax correction method for the vehicle-mounted head-up display further includes the following steps:
presetting a plurality of groups of preset left eye positions and preset right eye positions, and obtaining a group of first preset deviation values and a group of second preset deviation values according to each group of preset left eye positions and preset right eye positions; storing the preset left eye position, the preset right eye position, the first preset deviation value and the second preset deviation value which have corresponding relations into a group of correction parameters in an associated mode;
the method comprises the steps of acquiring monitoring results of a left eye position and a right eye position of a driver in real time, and searching matched correction parameters according to the left eye position and the right eye position to determine a first preset deviation value and a second preset deviation value matched with the left eye position and the right eye position.
The invention also provides a storage medium, wherein the storage medium is stored with program information, and a computer reads the program information and then executes the parallax correction method of the vehicle-mounted head-up display.
The invention also provides electronic equipment which comprises at least one processor and at least one memory, wherein program information is stored in the at least one memory, and the at least one processor reads the program information and then executes the parallax correction method of the vehicle-mounted head-up display.
Compared with the prior art, the technical scheme provided by the embodiment of the invention at least has the following beneficial effects: images formed by odd-numbered columns of screen pixel points and even-numbered columns of screen pixel points of an image generator are separated through an array columnar lens film, so that the images formed by the odd-numbered columns of content pixel points and the even-numbered columns of content pixel points of a projected image generated by the image generator are respectively transmitted to the left eye and the right eye of a driver, the images formed by the odd-numbered columns of content pixel points in the projected image are subjected to first preset deviation value movement in advance through an image processor, the images formed by the even-numbered columns of content pixel points in the projected image are subjected to second preset deviation value movement, the odd-numbered columns of content pixel points and the even-numbered columns of content pixel points can counteract actual deviation values generated after being reflected by windshield glass, therefore, a virtual image formed by the left eye and a virtual image formed by the right eye of the driver are kept consistent with an ideal position, the effect of superposition of the virtual images formed by the left eye and the right eye is realized, and VAC conflict of the vehicle-mounted HUD can be relieved, eliminate the dazzling feeling of the driver as much as possible.
Drawings
FIG. 1 is a schematic diagram of a prior art in-vehicle HUD imaging principle;
FIG. 2 is an enlarged schematic view of a circled portion of FIG. 1;
FIG. 3 is a schematic diagram of a prior art in-vehicle HUD showing VAC conflicts;
FIG. 4 is a schematic diagram of the imaging principle of the vehicle-mounted HUD according to one embodiment of the present invention;
FIG. 5a is an enlarged schematic view of a portion of the circle in FIG. 4;
FIG. 5b is a schematic diagram of the structure of the lenticular lens film of FIG. 5 a;
FIG. 6 is a schematic diagram of the imaging principle of a HUD with an array lenticular lens film disposed;
FIG. 7 is a schematic diagram of the effect of eliminating VAC conflicts after setting up the HUD of the array lenticular lens film;
FIG. 8a is a diagram illustrating a display result of the left view target view according to an embodiment of the present invention;
FIG. 8b is a schematic diagram illustrating a display result of the virtual left-view image corresponding to FIG. 8 a;
FIG. 8c is a schematic diagram of a comparison between FIGS. 8a and 8b to obtain a position coordinate offset value of the reference point of the standard in the two figures;
FIG. 8d is a schematic illustration of an updated left-view test view;
FIG. 8e is a diagram illustrating a display result of the virtual left-view image shown in FIG. 8 d;
FIG. 8f is a schematic diagram of the position coordinate offset values of the reference points in the two figures compared between FIG. 8d and FIG. 8 e;
FIG. 8g is a schematic diagram of the virtual left view image and the left view object image being nearly coincident;
FIG. 9a is a schematic diagram of coordinates of four corner positions of an area in a virtual left-view image;
FIG. 9b is a schematic diagram of the position coordinates of four corner points in the left-view target image of the area in FIG. 9 a;
FIG. 10a is a schematic diagram of virtual images with offset values as seen by the left and right eyes;
FIG. 10b is a schematic diagram showing the virtual image effect observed by the left and right eyes after the offset value in FIG. 10a is removed;
fig. 11 is a schematic diagram of a hardware connection relationship of an electronic device executing a parallax correction method for a vehicle-mounted head-up display according to an embodiment of the present invention.
Detailed Description
Embodiments of the present invention will be further described with reference to the accompanying drawings. In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description of the present invention, and do not indicate or imply that the device or assembly referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Wherein the terms "first position" and "second position" are two different positions.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; the two components can be directly connected or indirectly connected through an intermediate medium, and the two components can be communicated with each other. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art. In the following embodiments provided in the present application, unless mutually contradictory, different technical solutions may be mutually combined, and technical features thereof may be mutually replaced.
Some embodiments of the present invention provide a parallax correction system for a vehicle-mounted head-up display, as shown in fig. 4 to 7, including:
an array lenticular lens film 11 disposed on the screen of the image generator 1; the array columnar lens film 11 is used for refracting light emitted by each group of adjacent odd-numbered lines of screen pixel points 21 and even-numbered lines of screen pixel points 22 on the image generator 1 into a first path of light and a second path of light, wherein the first path of light is transmitted along a left light path 41 after being reflected by the windshield 3, and the second path of light is transmitted along a right light path 51 after being reflected by the windshield 3; wherein the left light path 41 passes through a preset left eye position 7, and the right light path 51 passes through a preset right eye position 6; wherein, the thickness of the array lenticular lens film 11 is preferably equal to about 1 mm.
The image processor is a module for processing images in the image generator 1, and extracts images formed by odd-numbered columns of content pixel points in the projected image generated by the image generator 1 as a first image and extracts images formed by even-numbered columns of content pixel points in the projected image as a second image; moving the first image to enable the position of a content pixel point of the first image in the screen to generate a first preset deviation value; moving the second image to enable the position of the content pixel point of the second image in the screen to generate a second preset deviation value; the first preset offset value offsets the actual offset value generated when the first image is reflected off the windshield and the second preset offset value offsets the actual offset value generated when the second image is reflected off the windshield. That is, assuming that the coordinate system where the screen pixel of the image generator is located is the reference coordinate system, the adjacent content pixel P originally located at the same position in the projected image is made to be the reference coordinate system(2i+1)jAnd content pixel point P(2i)jThe position in the reference coordinate system is shifted. The "content pixel point" proposed in the above scheme generates a first preset offset value or a second preset offset value at a position in the screen, where the first preset offset value or the second preset offset value is not a fixed and unchangeable value, and the meaning of the first preset offset value or the second preset offset value refers to a preset offset value generated by a content pixel point at each position in the first image and the second image, and preset offset values of content pixel points at different positions may be the same or different.
The structure of the array lenticular lens film 11 is shown in fig. 5b, and it is formed by arranging lenticular lenses 111 with arc-shaped cross sections. The light rays of the odd-numbered columns of screen pixel points 21 and the even-numbered columns of screen pixel points 10 adjacent to the same position on the screen of the image generator are constrained to be only reflected to the left eye position or the right eye position by utilizing the refractive power of the cylindrical lens 111. Thus, images entering left and right eyes of a driver correspond to images formed by odd-numbered columns of content pixel points and even-numbered columns of pixel points of a projection image generated by an image generator respectively, and if the images of the odd-numbered columns of content pixel points and the images of the even-numbered columns of content pixel points seen by the left and right eyes are controlled separately through an image processing function of an image processor, virtual images of the left and right eyes are overlapped visually, so that the imaging result in fig. 3 can be optimized to the result shown in fig. 7.
In the scheme, images formed by odd-numbered columns of screen pixel points and even-numbered columns of screen pixel points of an image generator 1 are separated through an array columnar lens film 11, so that the images formed by the odd-numbered columns of content pixel points and the even-numbered columns of content pixel points of a projected image generated by the image generator 1 are respectively transmitted to the left eye and the right eye of a driver, the images formed by the odd-numbered columns of content pixel points in the projected image are subjected to first preset offset value movement in advance through an image processor, the images formed by the even-numbered columns of content pixel points in the projected image are subjected to second preset offset value movement, the odd-numbered columns of content pixel points and the even-numbered columns of content pixel points can counteract actual offset values generated after being reflected by windshield glass, and therefore virtual images formed by the left eye and the right eye of the driver are consistent with ideal positions, and the effect that the virtual images formed by the left eye and the right eye are coincident is realized, therefore, VAC conflict of the vehicle-mounted HUD can be relieved, and dizzy feeling of a driver can be eliminated as far as possible.
Preferably, in the above scheme, the first preset offset value and the second preset offset value are obtained as follows:
the image generator 1 generates a left-view test image only containing odd-numbered columns of content pixel points, and obtains a projected image of the left-view test image at a windshield virtual image field (i.e. an area for reflecting the projected image on the windshield) obtained at the preset left-eye position as a left-view virtual image; setting the left-view test image at the virtual image field of the windshield glass, and acquiring a left-view test image result obtained at the preset left-eye position as a left-view target image; the image generator 1 generates a right-view test image only containing even-numbered rows of content pixel points, and obtains a projected image of the right-view test image at a windshield virtual image field, which is obtained at the preset right eye position, as a right-view virtual image; setting the right-view test image at the virtual image field of the windshield glass, and acquiring a right-view test image result obtained at the preset right eye position as a right-view target image; the image processor acquires the left-view virtual image, the right-view virtual image, the left-view target image and the right-view target image, and obtains the first preset offset value according to an offset value between content pixel points of the left-view target image and content pixel points of the left-view virtual image; and obtaining the second preset offset value according to the offset value between the content pixel point of the right-view target image and the content pixel point of the right-view virtual image. In the scheme, the test image is used for simulating the projection image generated by the image generator, the image in an ideal state is simulated by directly setting the test image in a windshield virtual image field, if the virtual image of the test image reflected by the windshield is coincident with the ideal image in a preset offset mode, the virtual image of the projection image in the left eye and the right eye of a driver is kept consistent with the ideal image after the preset offset, and when the virtual images formed by the left eye and the right eye of the driver are ideal images, the ghost image can be naturally eliminated.
In addition, when the projected image is reflected by the windshield, the position offset of each content pixel point on the projected image may not be changed linearly, so after the odd-numbered row content pixel points/even-numbered row content pixel points are adjusted by one-time preset offset, the deviation between a virtual image of the projected image reflected by the windshield and entering human eyes and an ideal image may still be very large, and at this time, the step of obtaining the first preset offset value/the second preset offset value and the step of adjusting the odd-numbered row content pixel points/even-numbered row content pixel points according to the first preset offset value/the second preset offset value can be repeated. That is, the image processor obtains the first preset offset value and the second preset offset value by:
adjusting the left test view: obtaining a first regulating quantity of content pixel points of a left-view test image according to an offset value between the content pixel points of the left-view target image and the content pixel points of the left-view virtual image; and moving the left-view test view according to the first adjustment quantity to obtain an updated left-view test view.
And (3) circularly adjusting the left test view: after the left side test view is updated, the left view virtual image is obtained again; and if the deviation value between the content pixel point of the left-view target image and the content pixel point of the left-view virtual image is smaller than a preset threshold value, taking the first adjustment quantity as the first preset deviation value, otherwise, repeating the left-side test view adjustment step until the deviation value between the content pixel point of the left-view target image and the content pixel point of the left-view virtual image is smaller than the preset threshold value.
Adjusting the right test view: obtaining a second adjustment quantity of content pixel points of a right-view test image according to an offset value between the content pixel points of the right-view target image and the content pixel points of the right-view virtual image; and moving the right-view test view according to the second adjustment quantity to obtain an updated right-view test view.
And (3) circularly adjusting the right test view: after the right side test view is updated, the right virtual image is obtained again; and if the deviation value between the content pixel point of the right-view target image and the content pixel point of the right-view virtual image is smaller than a preset threshold value, taking the second adjustment amount as the second preset deviation value, otherwise, repeating the step of adjusting the right-side test view until the deviation value between the content pixel point of the right-view target image and the content pixel point of the right-view virtual image is smaller than the preset threshold value.
The first preset deviation value is obtained after the first regulation quantity obtained in the step of regulating the left side test view and the step of circularly regulating each left side test view is measured and summed; and summing the second adjustment values obtained in the right side test view adjustment step and each right side test view cyclic adjustment step to obtain the second preset deviation value.
The cyclic adjustment step may be performed once or many times, and finally it can be satisfied that an offset value between a content pixel point of the left-view target image and a content pixel point of the left-view virtual image is smaller than a preset threshold value, and an offset value between a content pixel point of the right-view target image and a content pixel point of the right-view virtual image is smaller than a preset threshold value.
Specifically, in the above scheme, the process of observing the image by a person can be simulated by shooting the image by using the camera, so that the above scheme may further include a left-view camera disposed at the preset left-eye position 7; the left-view camera shoots a projection image of the left-view test image at the virtual image field of the windshield glass to obtain a left-view virtual image; the left-view camera shoots a left-view test image at the virtual image field of the windshield glass to obtain a left-view target image; the right-view camera is arranged at the preset right eye position 6; the right-view camera shoots a projection image of the right-view test image at the windshield virtual image field to obtain a right-view virtual image; and the right-view camera shoots a right-view test image at the virtual image field of the windshield glass to obtain the right-view target image. In the above, the images shot by the left-view camera and the right-view camera can be directly sent to the image processor.
The left-view test image and the right-view test image can be realized by adopting a screen display mode, namely, the scheme can also comprise a target image generator which is arranged at the virtual image field of the windshield glass and used for generating the left-view test image or the right-view test image; when the target image generator generates the left-view test image, the left-view camera shoots a screen of the target image generator to obtain a left-view target image; and when the target image generator generates the right-view test image, the right-view camera shoots the screen of the target image generator to obtain the right-view target image. In this scheme, shoot the real image simulation ideal image of directly placing in windshield virtual image field position department through the camera, shoot the virtual image simulation entering people's eye after windshield reflection of test image through the camera. The image processor adjusts the positions of the content pixel points of the test image to enable the positions of the virtual images to be consistent with the positions of the real images, and therefore the effect that the virtual images seen by human eyes are consistent with the ideal images can be achieved.
The above-mentioned preset offset procedure is explained in detail with reference to fig. 8a-8e, wherein the test image may be selected from the 8 × 5 pixel images shown in fig. 8 a. Taking the step of obtaining the first preset offset value as an example, the method includes:
1. left-view target image acquisition step (only once execution is sufficient):
(1.1) place the left view test image shown in figure 8a, including 8 x 5 standard reference points, in the virtual windscreen image field.
(1.2) placing the left-view camera at the preset left-eye position, and shooting the position of each standard reference point in the left-view test image in the figure 8a to obtain a left-view target image M1.
2. A step of acquiring a left-view virtual image:
(2.1) generating a left-view test image in the image 8a by odd-numbered rows of content pixel points of the image generator, reflecting the left-view test image by windshield glass, entering a left-view camera, obtaining a left-view virtual image M2 shown in the image 8b by the left-view camera, and sending the left-view virtual image M2 to an image processor, wherein the left-view virtual image M2 comprises the position of each standard reference point.
3. Calculating a first preset deviation value:
(3.1) taking one of the standard reference points in fig. 8a as an example, as shown in fig. 8c, comparing the left-view target image M1 with the left-view virtual image M2, assuming that the position obtained in step 1 is (Xref, Yref), and the position obtained in fig. 8b is (X, Y), the first adjustment amount E is (X-Xref, Y-Yref); obtaining a first adjustment quantity of each standard reference point according to the same mode; and then, the left-view test image generated by the odd-numbered columns of content pixels of the image generator is moved according to the first adjustment amount to obtain an updated left-view test image M3 shown in fig. 8 d.
(3.2) obtaining the left-view virtual image M4 shown in fig. 8e again by adopting the method in step 2, comparing the newly obtained left-view virtual image M4 with the left-view target image M1 as shown in fig. 8f, judging whether a deviation value between the position of each standard reference point in the left-view virtual image M4 and the position of each standard reference point in the left-view target image M1 in step 1 is smaller than a preset threshold value, if so, exiting the correction, otherwise, performing the next step. The preset threshold value is smaller than the pixel deviation value which can be distinguished by human eyes, and is set according to an empirical value.
(3.3) repeating the steps (3.1) and (3.2) until the deviation value between the position of each standard reference point in the left virtual image M4 and the position of each standard reference point in the left target image M1 in the step 1 is smaller than the preset threshold, as shown in fig. 8g, the left virtual image M5 is almost overlapped with the left target image M1, and at this time, the first adjustment amounts obtained in each cycle are added to obtain a first preset deviation value.
In the above scheme, in order to reduce the amount of computation, instead of calculating the first preset offset value for each pixel point in the image, N × M points are used to divide the entire screen into (N-1) × (M-1) regions, and the first adjustment amount is used to correspond each region in the left-view virtual image to each region in the left-view target image in a coordinate transformation manner. For example, (x)ij,yij1) is the position coordinate of the ith row and jth column content pixel point in the left virtual image, and (x)ij,yxj,tm) The coordinates of the ith row and jth content column pixel points in the left-view target image are obtained, and the projection transformation matrix can be obtained in the following mode:
Figure BDA0002701933940000131
wherein, tm、tkAnd tvAre transform coefficients. Specifically, referring to fig. 9a and 9b, assume that fig. 9a shows a region in the left virtual image, and the coordinates of its four corner points are shown as (x) respectively1,y1,1)、(x2,y2,1)、(x3,y31) and (x)4,y41); if it is transformed into the corresponding region in the left-view target image, the coordinates of the four corner points of the circumscribed quadrangle are converted into (t)1x1’,t1y1’,t1)、(t2x2’,t2y2’,t2)、(t3x3’,t3y3’,t3) And (t)4x4‘,t4y4’,t4) The projective transformation matrix can be solved according to the coordinate corresponding relation of the four corner points, and the preset bias can be carried out on the contents of all the points in the area after the projective transformation matrix is obtainedAnd (6) moving.
According to the scheme, the array lenticular lens film 11 newly added on the physical structure is combined with the image processing method of the image processor, so that the dizzy feeling of a driver when watching the image reflected by the windshield glass of the HUD can be reduced and eliminated to the greatest extent. As shown in fig. 10a, the left-view camera captures a projection result of the projection image in the windshield virtual image field to obtain a left-view virtual image 9; the right-view camera shoots the projection result of the projection image on the windshield virtual image field to obtain a right-view virtual image 8, if the projection result is not processed, the images seen by the left eye and the right eye of a driver have certain deviation, and the image processor processes the projection result by adopting the scheme of the invention, so that each content pixel point in the left-view virtual image moves, each content pixel point in the right-view virtual image moves, and the moving distance just can offset the deviation between the left virtual image and the right virtual image in the image 10a, so that the superposition result shown in the image 10b can be obtained, namely the images seen by the left eye and the right eye can be superposed and then restored to the digital number of 2.
Further, in some aspects, the thickness T _ len of the array lenticular lens film 11, the focal length F _ len of the lenticular lens 111, the radius R _ len of the lenticular lens 111, and the distance D _ len between central axes of adjacent lenticular lenses are obtained as follows:
T_len=F_len=R_len/(n-1)=(VID×D_pixel)/(Q×B);
D_len=2×D_pixel×(VID-T_len×B^2)/VID。
n is the refractive index of the lenticular lens, the refractive index can be determined as long as the material selected by the lenticular lens is determined, Q is a preset binocular through hole distance, VID is the virtual image width of the vehicle-mounted head-up display, B is the transverse magnification of the vehicle-mounted head-up display, and D _ pixel is the distance between two adjacent columns of pixel points in the image generator.
In on-vehicle HUD, can dispose various performance parameters in advance, wherein just include: a standard eyepoint EP position (a position between the left eye and the right eye), a virtual image distance VID (mainly the width in the present embodiment), and a HUD virtual image angle H × V, where H denotes the width of the virtual image field and V denotes the length of the virtual image field. Then, according to the performance parameters of the vehicle-mounted HUD, defining the aperture surface of the vehicle-mounted HUD as a standard eyepoint position, and defining the lateral magnification ratio beta of the vehicle-mounted HUD as virtual image field width/image generator lateral length; therefore, the related parameters are known quantities, the preset binocular through hole distance can be 65mm, and the preset binocular through hole distance is obtained according to the average value of the binocular through hole distances of a large number of adults. After obtaining the relevant parameters of the array lenticular lens film, the relevant parameters can be substituted into optical optimization software such as ZEMAX, LightTools, CodeV and the like for optimization and fine adjustment. And manufacturing a cylindrical lens array film according to the parameters, attaching the cylindrical lens array film to the projection surface of the image generator, and assembling the vehicle-mounted HUD complete machine to a target vehicle.
For different target vehicles, due to different vehicle types, different seat heights, different seat angles and other factors, the positions of left and right eyes of a driver sitting on the seat are different. When the vehicle is designed, the positions of the left eye and the right eye of a driver are simulated by adopting a standard human body model, and the position of the preset left eye and the position of the preset right eye can be obtained according to a simulation result. Standard eye point position can set up between the left and right eyes position that the simulation obtained when on-vehicle HUD is installed, and on-vehicle HUD installation is accomplished from this. When the vehicle-mounted HUD works, each pixel point in an image signal transmitted by the upper computer is subjected to real-time coordinate remapping according to the corresponding preset deviation value, so that a driver can obtain a better image viewing effect.
Further, the parallax correction system of the vehicle-mounted head-up display in the above scheme may further include an eye tracking module, wherein multiple sets of correction parameters are pre-stored in the image processor, and different sets of correction parameters include different preset left eye positions and preset right eye positions, and preset deviation values corresponding to the preset left eye positions and the preset right eye positions; the human eye tracking module monitors the left eye position and the right eye position of the driver in real time and sends the monitoring result to the image processor; and the image processor searches for matched correction parameters according to the left eye position and the right eye position so as to determine a preset deviation value matched with the left eye position and the right eye position.
Because the head of a driver can rotate in the driving process, the deviation between the positions of the left eye and the right eye of the driver and the preset positions of the left eye and the preset positions of the right eye is too large, and in order to avoid dizziness, the scheme provides that the positions of the left eye and the right eye of the driver obtained by human body model simulation are used as the preset positions of the left eye and the preset positions of the right eye in the initial stage, but a plurality of groups of position points are selected in the moving range of the head of the driver to determine the preset deviation value. For example, the head movement range of the driver is limited to a square area, a set of correction parameters can be determined by taking the center of the square area as a standard eyepoint, and four sets of correction parameters can be determined by taking four corner points of the square area as standard eyepoints respectively. In the driving process of a driver, the position of the eyeball of the driver is tracked in real time, the optimal correction parameter is matched, the optimal preset deviation value is obtained, and the situation of VAC can be avoided when the head of the driver moves.
In another embodiment of the present invention, a parallax correction method for a vehicle-mounted head-up display is provided, which may be applied to an image processor in the vehicle-mounted head-up display, and the method may include the following steps:
the method comprises the following steps: a projection image generated by an image generator is acquired.
Step two: and extracting an image formed by odd-numbered rows of content pixel points in the projected image as a first image, and extracting an image formed by even-numbered rows of content pixel points in the projected image as a second image.
Step three: moving the first image to enable the position of a content pixel point of the first image in a screen of the image generator to generate a first preset offset value; moving the second image to enable the position of the content pixel point of the second image in the screen to generate a second preset deviation value; the first preset offset value offsets the actual offset value generated when the first image is reflected off the windshield and the second preset offset value offsets the actual offset value generated when the second image is reflected off the windshield.
Above scheme, with array lenticular lens membrane cooperation back, can slow down or eliminate the VAC effect, comfort level when increasing the driver and using on-vehicle HUD.
Preferably, in the above scheme, the step three includes:
s1.1: acquiring a projection image of the left-view test image at the windshield virtual image field, which is obtained from the preset left eye position, as a left-view virtual image; the left-view test image is an image which is generated by an image generator and only contains odd-numbered rows of content pixel points.
S1.2: and setting the left-view test image at the virtual image field of the windshield glass, and acquiring a left-view test image result obtained by presetting the left-eye position as a left-view target image.
S1.3: acquiring a projection image of the right-view test image at the windshield virtual image field, which is obtained from the preset right eye position, as a right-view virtual image; the right-view test image is an image which is generated by the image generator and only contains even-numbered rows of content pixel points.
S1.4: setting the right-view test image at the virtual image field of the windshield glass, and acquiring a right-view test image result obtained at the preset right eye position as a right-view target image;
s1.5: obtaining the first preset offset value according to the offset value between the content pixel point of the left-view target image and the content pixel point of the left-view virtual image; and obtaining the second preset offset value according to the offset value between the content pixel point of the right-view target image and the content pixel point of the right-view virtual image.
The left-view virtual image is obtained by shooting a projection image of the left-view test image at the virtual image field of the windshield glass by a left-view camera arranged at the preset left-eye position; the left-view target image is obtained by shooting a left-view test image arranged at a virtual image field of the windshield by the left-view camera; the right-view virtual image is obtained by shooting a projection image of the right-view test image at a windshield glass virtual image field by a right-view camera arranged at the preset right eye position; and the right-view target image is obtained by shooting a right-view test image arranged at the virtual image field of the windshield by the right-view camera.
The left-view camera with the right-view camera is equivalent to the left eye and the right eye of a driver, and the left-view camera and the right-view camera obtain ideal images when shooting real images (rather than images obtained by reflection of windshield glass) at a windshield glass virtual image field, so that projected images reflected by the windshield glass in practical application are completely translated to corresponding ideal image positions at virtual images formed by the left-view camera and the right-view camera, and therefore virtual images shot by the left-view camera and the right-view camera can be necessarily called images consistent with ideal results.
Further preferably, the step S1.5 may further include:
s1.51: left side test view adjustment step: obtaining a first regulating quantity of content pixel points of a left-view test image according to an offset value between the content pixel points of the left-view target image and the content pixel points of the left-view virtual image; moving the left-view test view according to the first adjustment quantity to obtain an updated left-view test view;
s1.52: and (3) circularly adjusting the left test view: after the left side test view is updated, the left view virtual image is obtained again; if the deviation value between the content pixel point of the left-view target image and the content pixel point of the left-view virtual image is smaller than a preset threshold value, taking the first adjustment amount as the first preset deviation value, otherwise, repeating the left-side test view adjustment step until the deviation value between the content pixel point of the left-view target image and the content pixel point of the left-view virtual image is smaller than the preset threshold value;
s1.53: adjusting the right test view: obtaining a second adjustment quantity of content pixel points of a right-view test image according to an offset value between the content pixel points of the right-view target image and the content pixel points of the right-view virtual image; moving the right-view test view according to the second adjustment quantity to obtain an updated right-view test view;
s1.54: and (3) circularly adjusting the right test view: after the right side test view is updated, the right virtual image is obtained again; if the deviation value between the content pixel point of the right-view target image and the content pixel point of the right-view virtual image is smaller than a preset threshold value, taking the second adjustment amount as a second preset deviation value, otherwise, repeating the right-side test view adjustment step until the deviation value between the content pixel point of the right-view target image and the content pixel point of the right-view virtual image is smaller than the preset threshold value;
s1.55: the first preset deviation value is obtained after the first regulation quantity obtained in the step of regulating the left side test view and the step of circularly regulating each left side test view is measured and summed; and summing the second adjustment values obtained in the right side test view adjustment step and each right side test view cyclic adjustment step to obtain the second preset deviation value.
That is, when actually obtaining the threshold deviation value, it may be necessary to perform the cyclic adjustment step for multiple times, and finally it can be satisfied that the deviation value between the content pixel point of the left-view target image and the content pixel point of the left-view virtual image is smaller than the preset threshold value, and the correction process is ended after the deviation value between the content pixel point of the right-view target image and the content pixel point of the right-view virtual image is smaller than the preset threshold value.
Preferably, the preset left eye position and the preset right eye position in the above scheme include multiple groups, and a group of preset deviation values is obtained according to each group of preset left eye position and preset right eye position; storing the preset left eye position, the preset right eye position and the preset deviation value which have the corresponding relation into a group of correction parameters in an associated manner; and acquiring monitoring results of the left eye position and the right eye position of the driver in real time, and searching matched correction parameters according to the left eye position and the right eye position to determine a preset deviation value matched with the left eye position and the right eye position. In the driving process of a driver, the optimal correction parameters are matched by tracking the eyeball position of the driver in real time to obtain the optimal preset deviation value, and the situation of VAC can be avoided when the head of the driver moves.
Some embodiments of the present invention provide a storage medium, where program instructions are stored in the storage medium, and a computer reads the program instructions and then executes the parallax correction method of the vehicle-mounted head-up display according to any one of the above aspects.
Another aspect of the present invention also provides an electronic device, as shown in fig. 11, including at least one memory 1102 and at least one processor 1101, where the apparatus may further include: an input device 1103 and an output device 1104. The processor 1101, memory 1102, input device 1103, and output device 1104 may be connected by a bus or other means. The at least one memory 1102 stores program instructions, and the at least one processor 1101 executes the parallax correction method of the on-board heads-up display according to any one of the above embodiments after reading the program instructions.
The product can execute the method provided by the embodiment of the application, and has the corresponding functional modules and beneficial effects of the execution method. For technical details that are not described in detail in this embodiment, reference may be made to the methods provided in the embodiments of the present application.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims (14)

1. A parallax correction system for a vehicle-mounted head-up display, comprising:
an array lenticular lens film disposed on a screen of the image generator; the array columnar lens film is used for refracting light rays emitted by each group of adjacent odd-numbered rows of screen pixel points and even-numbered rows of screen pixel points on the image generator into a first path of light rays and a second path of light rays, the first path of light rays are transmitted along a left light path after being reflected by the windshield glass, and the second path of light rays are transmitted along a right light path after being reflected by the windshield glass; the left light path passes through a preset left eye position, and the right light path passes through a preset right eye position;
the image processor extracts an image formed by odd-numbered columns of content pixel points in the projected image generated by the image generator as a first image and extracts an image formed by even-numbered columns of content pixel points in the projected image as a second image; moving the first image to enable the position of a content pixel point of the first image in the screen to generate a first preset deviation value; moving the second image to enable the position of the content pixel point of the second image in the screen to generate a second preset deviation value; the first preset offset value offsets the actual offset value generated when the first image is reflected off the windshield and the second preset offset value offsets the actual offset value generated when the second image is reflected off the windshield.
2. The on-board heads-up display parallax correction system of claim 1, wherein the first and second preset offset values are obtained by:
the image generator generates a left-view test image only containing odd-numbered rows of content pixel points, and obtains a projected image of the left-view test image at a windshield virtual image field, which is obtained from the preset left-eye position, as a left-view virtual image; setting the left-view test image at the virtual image field of the windshield glass, and acquiring a left-view test image result obtained by presetting a left-eye position as a left-view target image;
the image generator generates a right-view test image only containing even-numbered rows of content pixel points, and obtains a projected image of the right-view test image at a windshield virtual image field, which is obtained at the preset right eye position, as a right-view virtual image; setting the right-view test image at the virtual image field of the windshield glass, and acquiring a right-view test image result obtained at the preset right eye position as a right-view target image;
the image processor acquires the left-view virtual image, the right-view virtual image, the left-view target image and the right-view target image, and obtains the first preset offset value according to an offset value between content pixel points of the left-view target image and content pixel points of the left-view virtual image; and obtaining the second preset offset value according to the offset value between the content pixel point of the right-view target image and the content pixel point of the right-view virtual image.
3. The on-board heads-up display parallax correction system of claim 2, wherein the image processor obtains the first and second preset offset values by:
adjusting a left-view test image: obtaining a first adjustment quantity of content pixel points of a left-view test image according to an offset value between the content pixel points of the left-view target image and the content pixel points of the left-view virtual image; moving the left-view test image according to the first adjustment quantity to obtain an updated left-view test image;
and (3) circularly adjusting the left-view test image: after the left-view test image is updated, the left-view virtual image is obtained again; if the deviation value between the content pixel point of the left-view target image and the content pixel point of the left-view virtual image is smaller than a preset threshold value, taking the first adjustment amount as the first preset deviation value, otherwise, repeating the left-view test image adjustment step until the deviation value between the content pixel point of the left-view target image and the content pixel point of the left-view virtual image is smaller than the preset threshold value;
and adjusting the right-view test image: obtaining a second adjustment quantity of content pixel points of a right-view test image according to an offset value between the content pixel points of the right-view target image and the content pixel points of the right-view virtual image; moving the right-view test image according to the second adjustment quantity to obtain an updated right-view test image;
and a step of circularly adjusting the right-view test image: after the right-view test image is updated, the right-view virtual image is obtained again; if the deviation value between the content pixel point of the right-view target image and the content pixel point of the right-view virtual image is smaller than a preset threshold value, taking the second adjustment amount as the second preset deviation value, otherwise, repeating the right-view test image adjustment step until the deviation value between the content pixel point of the right-view target image and the content pixel point of the right-view virtual image is smaller than the preset threshold value;
the first preset deviation value is obtained after the first regulating quantity obtained in the step of regulating the left-view test image and the step of circularly regulating each left-view test image are summed; and summing the second adjusting quantity obtained in the right-view test image adjusting step and each right-view test image circulation adjusting step to obtain a second preset deviation value.
4. The on-board heads-up display parallax correction system of claim 2, further comprising:
the left-view camera is arranged at the preset left-eye position; the left-view camera shoots a projection image of the left-view test image at the virtual image field of the windshield glass to obtain a left-view virtual image; the left-view camera shoots a left-view test image at the virtual image field of the windshield glass to obtain a left-view target image;
the right-view camera is arranged at the preset right eye position; the right-view camera shoots a projection image of the right-view test image at the windshield virtual image field to obtain a right-view virtual image; and the right-view camera shoots a right-view test image at the virtual image field of the windshield glass to obtain the right-view target image.
5. The on-board heads-up display parallax correction system of claim 4, further comprising:
the target image generator is arranged at the virtual image field of the windshield glass and used for generating the left-view test image or the right-view test image;
when the target image generator generates the left-view test image, the left-view camera shoots a screen of the target image generator to obtain a left-view target image;
and when the target image generator generates the right-view test image, the right-view camera shoots the screen of the target image generator to obtain the right-view target image.
6. The vehicle head-up display parallax correction system according to any one of claims 1 to 5, wherein a thickness T _ len of the array lenticular lens film, a focal length F _ len of the lenticular lens, a radius R _ len of the lenticular lens, and a distance D _ len between central axes of adjacent lenticular lenses are obtained by:
T_len=F_len=R_len/(n-1)=(VID×D_pixel)/(Q×B);
D_len=2×D_pixel×(VID-T_len×B^2)/VID;
wherein n is the refracting index of lenticular lens, and Q is for predetermineeing the binocular through-hole interval, and VID is on-vehicle new line display's virtual image width, and B is on-vehicle new line display's horizontal magnification, and D _ pixel is the distance between two adjacent columns of pixel points in the image generator.
7. The vehicle heads-up display parallax correction system of claim 6, further comprising an eye tracking module:
the image processor is used for pre-storing a plurality of groups of correction parameters, wherein different groups of correction parameters comprise different preset left eye positions and preset right eye positions, and first preset deviation values and second preset deviation values corresponding to the preset left eye positions and the preset right eye positions;
the human eye tracking module monitors the left eye position and the right eye position of the driver in real time and sends the monitoring result to the image processor;
and the image processor searches for matched correction parameters according to the left eye position and the right eye position so as to determine a first preset deviation value and a second preset deviation value which are matched with the left eye position and the right eye position.
8. A parallax correction method for a vehicle-mounted head-up display is characterized by comprising the following steps:
acquiring a projection image generated by an image generator;
extracting an image formed by odd-numbered content pixel points in the projected image as a first image, and extracting an image formed by even-numbered content pixel points in the projected image as a second image;
moving the first image to enable the position of a content pixel point of the first image in a screen of the image generator to generate a first preset offset value; moving the second image to enable the position of the content pixel point of the second image in the screen to generate a second preset deviation value; the first preset offset value offsets the actual offset value generated when the first image is reflected off the windshield and the second preset offset value offsets the actual offset value generated when the second image is reflected off the windshield.
9. The parallax correction method for the vehicle-mounted head-up display according to claim 8, further comprising a step of obtaining the first preset offset value and the second preset offset value, specifically comprising:
acquiring a projected image of a left-view test image at a windshield virtual image field, which is obtained by presetting a left eye position, as a left-view virtual image; the left-view test image is an image which is generated by an image generator and only contains odd-numbered rows of content pixel points;
setting the left-view test image at the virtual image field of the windshield glass, and acquiring a left-view test image result obtained by presetting a left-eye position as a left-view target image;
acquiring a projected image of a right-view test image at a windshield virtual image field, which is obtained by presetting a right eye position, as a right-view virtual image; the right-view test image is an image which is generated by the image generator and only contains even-numbered rows of content pixel points;
setting the right-view test image at the virtual image field of the windshield glass, and acquiring a right-view test image result obtained at the preset right eye position as a right-view target image;
obtaining the first preset offset value according to the offset value between the content pixel point of the left-view target image and the content pixel point of the left-view virtual image; and obtaining the second preset offset value according to the offset value between the content pixel point of the right-view target image and the content pixel point of the right-view virtual image.
10. The parallax correction method for the vehicle-mounted head-up display according to claim 9, wherein in the step of obtaining the first preset offset value and the second preset offset value:
the left-view virtual image is obtained by shooting a projection image of the left-view test image at the position of the windshield virtual image field by a left-view camera arranged at the preset left-eye position; the left-view target image is obtained by shooting a left-view test image arranged at a virtual image field of the windshield by the left-view camera;
the right-view virtual image is obtained by shooting a projection image of the right-view test image at a windshield glass virtual image field by a right-view camera arranged at the preset right eye position; and the right-view target image is obtained by shooting a right-view test image arranged at the virtual image field of the windshield by the right-view camera.
11. The parallax correction method for the vehicle-mounted head-up display according to claim 10, wherein the step of obtaining the first preset offset value and the second preset offset value specifically comprises:
adjusting a left-view test image: obtaining a first adjustment quantity of content pixel points of a left-view test image according to an offset value between the content pixel points of the left-view target image and the content pixel points of the left-view virtual image; moving the left-view test image according to the first adjustment quantity to obtain an updated left-side test image;
and (3) circularly adjusting the left-view test image: after the left-view test image is updated, the left-view virtual image is obtained again; if the deviation value between the content pixel point of the left-view target image and the content pixel point of the left-view virtual image is smaller than a preset threshold value, taking the first adjustment amount as the first preset deviation value, otherwise, repeating the left-view test image adjustment step until the deviation value between the content pixel point of the left-view target image and the content pixel point of the left-view virtual image is smaller than the preset threshold value;
and adjusting the right-view test view: obtaining a second adjustment quantity of content pixel points of a right-view test image according to an offset value between the content pixel points of the right-view target image and the content pixel points of the right-view virtual image; moving the right-view test image according to the second adjustment quantity to obtain an updated right-view test image;
and (3) circularly adjusting the right-view test image: after the right-view test image is updated, the right-view virtual image is obtained again; if the deviation value between the content pixel point of the right visual target image and the content pixel point of the right visual virtual image is smaller than a preset threshold value, taking the second adjustment quantity as a second preset deviation value, otherwise, repeating the step of adjusting the right visual test image until the deviation value between the content pixel point of the right visual target image and the content pixel point of the right visual virtual image is smaller than the preset threshold value;
the first preset deviation value is obtained after the first regulating quantity obtained in the step of regulating the left-view test image and the step of circularly regulating each left-view test image are summed; and summing the second adjusting quantity obtained in the step of adjusting the right-view test image and the step of circularly adjusting each right-view test image to obtain the second preset deviation value.
12. The parallax correction method for the vehicle-mounted head-up display according to any one of claims 9 to 11, further comprising the steps of:
presetting a plurality of groups of preset left eye positions and preset right eye positions, and obtaining a group of first preset deviation values and a group of second preset deviation values according to each group of preset left eye positions and preset right eye positions; storing the preset left eye position, the preset right eye position, the first preset deviation value and the second preset deviation value which have corresponding relations into a group of correction parameters in an associated mode;
the method comprises the steps of acquiring monitoring results of a left eye position and a right eye position of a driver in real time, and searching matched correction parameters according to the left eye position and the right eye position to determine a first preset deviation value and a second preset deviation value which are matched with the left eye position and the right eye position.
13. A storage medium having program information stored therein, wherein the program information is read by a computer to execute the parallax correction method of the in-vehicle heads-up display according to any one of claims 8 to 12.
14. An electronic device, comprising at least one processor and at least one memory, wherein at least one of the memories stores program information, and when the program information is read by the at least one processor, the at least one processor performs the parallax correction method for the in-vehicle heads-up display according to any one of claims 8 to 12.
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