KR102148575B1 - Hologram HUD evaluation method and system for backlight and illumination - Google Patents

Abstract

The present invention is characterized by consisting of a hologram HUD (head up display) evaluation system for backlight and illuminance, a hologram image measuring unit, a hologram HUD system unit, and a backlight illumination unit,
In addition, the present invention relates to a holographic HUD (head up display) evaluation method for backlight and illuminance. In the holographic HUD (head up display) evaluation method for backlight and illuminance, the viewing window of the HUD is measured using a stereo camera. And
Measures the luminance level according to the luminance and backlight level of the image recorded by the stereo camera,
It measures the brightness and color of a holographic image using a luminance meter,
Holographic HUD evaluation method and system for backlight and illuminance of the present invention perform image evaluation under the influence of backlight and illuminance on an augmented reality HUD image observed through a vehicle glass on which a holographic film is inserted or attached, and inserted or attached to the vehicle glass. There is a remarkable effect of confirming the characteristics of the hologram.

Description

Hologram HUD evaluation method and system for backlight and illumination {Hologram HUD evaluation method and system for backlight and illumination}

The present invention relates to a method and system for evaluating a holographic HUD for backlight and illuminance, and more particularly, for an augmented reality HUD image observed through a vehicle glass to which a holographic film is inserted or attached, an image evaluation under the influence of backlight and illuminance. The present invention relates to a hologram HUD evaluation method and system for backlight and illuminance to check the characteristics of a hologram inserted or attached to a vehicle glass.

Recently, there is a lot of interest in the development of HUD using hologram technology.

The use of a holographic HUD has the advantage of reducing the system volume of the AR HUD. Thus, the holographic HUD can be used by a smaller vehicle installation space and can provide a larger image including all relevant information of the vehicle.

This innovation allows the driver to see all relevant information right in front of his eyes in a very intuitive way that gives quick and easy directions. The technology will also allow drivers to embrace autonomous driving faster. As acceptance of AR HUD increases, drivers will trust the information the vehicle actually sees and perceives. As a result, drivers' confidence in autonomous driving will be greatly improved.

In order to manufacture a holographic HUD, a holographic optical element (HOE) film recorded on an existing vehicle is attached or inserted into the vehicle glass.

The HOE film may be deformed or incorrectly installed in the process of attaching or inserting the hologram on the vehicle glass. In this case, distortion may occur in the holographic HUD image through the vehicle glass.

In addition, there is a problem in that a distorted image can be provided to the driver by being affected by HOE according to backlight and illumination generated by an external vehicle or lighting.

In order to provide a proper holographic HUD system to a vehicle by measuring the distortion of the holographic image according to such backlight and illuminance, a hologram evaluation method according to backlight and illuminance is required, but there is no specific hologram evaluation method yet.

As a prior art, in a vehicle HUD system of Patent Registration No. 10-0820898, in a vehicle head-up display system, a waveguide having a reflective surface for reflecting an image beam input from an external display source from the inside. ; And a diffractive optical element installed at one end of the waveguide and diffracting the image beam reflected through the reflective surface in the direction of a windshield. It is described as a head-up display system for a vehicle.

As another prior art, there is provided a vehicle head-up display system of Patent Publication No. 10-0813493, comprising: a display source for outputting an image; A light output unit for outputting light for reflecting or transmitting the image output by the display source; And a mirror array that sequentially reflects the image reflected or transmitted by the light output unit by changing a reflection angle in a windshield direction.It is described as a head-up display system for a vehicle. .

However, the conventional configuration as described above has a disadvantage in that the hologram film cannot perform image evaluation on the augmented reality HUD image observed through the vehicle glass under the influence of backlight and illuminance, and thus cannot confirm the characteristics of the hologram of the vehicle glass.

Therefore, through the holographic HUD evaluation method and system for backlight and illuminance of the present invention, the augmented reality HUD image observed through the vehicle glass to which the hologram film is inserted or attached is evaluated under the influence of backlight and illuminance to the vehicle glass. It is intended to provide a holographic HUD evaluation method and system for backlight and illuminance to check the characteristics of the inserted or attached hologram.

The present invention is characterized in that it is composed of a hologram HUD (head up display) evaluation system for backlight and illuminance, a hologram image measuring unit, a hologram HUD system unit, and a backlight illumination unit.

In addition, the present invention relates to a holographic HUD (head up display) evaluation method for backlight and illuminance. In the holographic HUD (head up display) evaluation method for backlight and illuminance, the viewing window of the HUD is measured using a stereo camera. And

Measures the luminance level according to the luminance and backlight level of the image recorded by the stereo camera,

It characterized in that the brightness and color of the hologram image are measured using a luminance meter.

Holographic HUD evaluation method and system for backlight and illuminance of the present invention perform image evaluation under the influence of backlight and illuminance on an augmented reality HUD image observed through a vehicle glass on which a holographic film is inserted or attached, and inserted or attached to the vehicle glass. There is a remarkable effect of confirming the characteristics of the hologram.

1 is a conceptual diagram of a HUD using hologram technology
FIG. 2 is a conceptual photograph of an experiment requesting a hologram HOE in a waveguide
3 is a photograph of the actual implementation environment of the present invention
4 and 5 are an implementation concept diagram of a holographic HUD evaluation method and system for backlight and illuminance of the present invention
6 is an exemplary diagram of a spatial luminance image obtained using a luminance meter
7 and 8 are experimental results using a luminance meter

The present invention is characterized in that it is composed of a hologram HUD (head up display) evaluation system for backlight and illuminance, a hologram image measuring unit, a hologram HUD system unit, and a backlight illumination unit.

In addition, the holographic image measuring unit is composed of a stereo camera composed of two cameras resembling a human visual structure installed on the moving stage and a luminance device capable of measuring the spectral spectrum of the image to observe the holographic image,

The hologram HUD system unit is configured with a vehicle glass including a HOE film and an image display device showing HUD vehicle information to provide a holographic HUD image.

In addition, the present invention relates to a holographic HUD (head up display) evaluation method for backlight and illuminance. In the holographic HUD (head up display) evaluation method for backlight and illuminance, the viewing window of the HUD is measured using a stereo camera. And

Measures the luminance level according to the luminance and backlight level of the image recorded by the stereo camera,

It characterized in that the brightness and color of the hologram image are measured using a luminance meter.

The present invention will be described in detail with reference to the accompanying drawings as follows.

1 is a conceptual diagram of a HUD using hologram technology, FIG. 2 is a conceptual photograph of an experiment requesting a hologram HOE in a vehicle glass (Waveguide), FIG. 3 is a photograph of an actual implementation environment of the present invention, and FIGS. 4 and 5 are backlight and illuminance of the present invention. An implementation concept diagram of a hologram HUD evaluation method and system for, FIG. 6 is an exemplary diagram of a spatial luminance image obtained using a luminance meter, and FIGS. 7 and 8 are experimental results using a luminance meter.

When describing the present invention in detail, the present invention includes a hologram image measuring unit, a hologram HUD system unit, and a backlighting unit, as shown in FIG. 4.

The holographic image measuring unit observes a holographic image using a stereo camera composed of two cameras resembling a human visual structure installed on a moving stage and a luminance device capable of measuring the spectroscopy of the image.

The hologram HUD system unit includes a vehicle glass including a HOE film and an image display device showing HUD vehicle information, and provides a holographic HUD image.

It is composed of a backlighting unit composed of a light source that is irradiated in a reverse direction from various directions with respect to the holographic image generated through the hologram HUD system unit.

In FIG. 3, a Zed camera is used for the stereo image unit, a CS-1000 for luminance measurement unit, a half mirror for the vehicle glass unit, 15 light bulb stands for the backlighting unit, and a 20-inch display module for the HUD image display unit.

The following holographic image evaluation can be performed using the developed evaluation system.

(1) A stereo camera can be used to measure the HUD's viewing window.

The viewing window is a range in which the hologram can be observed through the vehicle glass to which the hologram is attached.

The range measurement method can be measured using a stage on which a stereo camera is mounted.

(2) It is possible to measure the brightness of an image recorded by a stereo camera and the degree of brightness according to the degree of backlight.

It is possible to measure the degree of uniformity that the holographic image observed by the HOE vehicle glass is visible to the human eye.

The luminance is classified by using the difference in the intensity distribution of the backlight.

The non-uniformity can be determined by calculating the PSNR of the original input image and holographic image to be displayed.

The maximum signal-to-noise ratio (PSNR) is the power of noise relative to the maximum power a signal can have. It is mainly used to evaluate image quality impairment information in video or video.

MAX is the maximum value of the video, and can be obtained by subtracting the minimum value from the maximum value of the channel. For example, in the case of an 8-bit gray scale image, 255-0 = 255.

MSE (Mean Square Error) is obtained by the following method.

1) Find the average. 2) Square the value of each data minus the mean. 3) Add all the values obtained in step 2. 4) Divide the value obtained in step 3 by the total number of data.

(3) Using a luminance meter, the brightness and color of a holographic image can be measured.

Using a luminance meter, the brightness and color of a holographic image according to backlight can be measured.

By changing the degree of backlighting, the luminance meter is measured to extract 3D spatial luminance information.

Accordingly, the method and system for evaluating a holographic HUD for backlight and illuminance of the present invention perform image evaluation under the influence of backlight and illuminance on an augmented reality HUD image observed through a vehicle glass on which a holographic film is inserted or attached, and inserted into the vehicle glass or There is a remarkable effect of confirming the characteristics of the attached hologram.

Claims (3)

delete In the hologram HUD (head up display) evaluation system for backlight and illuminance, which is composed of a hologram image measuring unit, a hologram HUD system unit, and a backlight illumination unit,
The holographic image measuring unit is composed of a stereo camera composed of two cameras resembling a human visual structure installed on a moving stage and a luminance meter capable of measuring the spectral spectrum of the image to observe the holographic image,
The hologram HUD system unit is a holographic HUD (head up display) evaluation system for backlight and illuminance, comprising a vehicle glass including a HOE film and an image display device showing HUD vehicle information to provide a holographic HUD image. It is composed of a hologram image measurement unit, a hologram HUD system unit, and a backlighting unit, and the hologram image measurement unit is composed of a stereo camera composed of two cameras resembling the human visual structure installed on the moving stage and a luminance meter capable of measuring the spectral spectrum of the image. In the holographic HUD (head up display) evaluation method for backlight and illuminance for observing a holographic image,
Measure the viewing window of the HUD using the stereo camera,
Measures the luminance level according to the luminance and backlight level of the image recorded by the stereo camera,
Holographic HUD (head up display) evaluation method for backlight and illuminance characterized by measuring the brightness and color of a holographic image using a luminance meter

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