A Visual Perception-Based Method for Measuring Aircraft Cockpit Light Environment

Abstract

This invention discloses a method for measuring the light environment of an aircraft cockpit based on visual perception. The method includes: determining the correspondence between the brightness value of a calibration target and the grayscale value of the target image, i.e., a brightness / grayscale conversion function; determining an image of the aircraft cockpit scene during flight; and determining the brightness of the light environment of the aircraft cockpit during flight based on the image of the aircraft cockpit scene and the brightness / grayscale conversion function. The advantages of this invention are: it measures the brightness of the display screen, control panel and its operating devices, and the overall environment of the aircraft cockpit through visual perception imaging; it can measure both specific areas or points and the entire cockpit.

Description

Technical Field

[0001] This invention relates to automatic light metering in aircraft cockpits, and more particularly, to a method for measuring the light environment in aircraft cockpits based on visual perception. Background Technology

[0002] Current aircraft cockpit automatic metering and dimming systems use light sensors to detect changes in the cabin's lighting environment and adjust the brightness of the cockpit display screen to provide pilots with a comfortable visual experience. Summary of the Invention

[0003] The purpose of this invention is to provide a novel visual perception-based method for measuring the light environment in an aircraft cockpit, which differs from existing light sensor methods.

[0004] To achieve the above objectives, the present invention provides a technical solution: a method for measuring the light environment of an aircraft cockpit, comprising: A ground-based visual perception-based aircraft cockpit light environment calibration system is established. The aircraft cockpit light environment calibration system includes an aircraft simulated cockpit, a sky light simulated light source located outside the aircraft simulated cockpit, and a calibration light environment luminance meter and a calibration light environment acquisition camera located inside the aircraft simulated cockpit. Based on the luminance value of the calibration target measured by the calibration light environment luminance meter and the target image of the calibration target captured by the calibration light environment acquisition camera, the correspondence between the luminance value of the calibration target and the grayscale value of the target image of the calibration target is determined, i.e., the luminance / grayscale conversion function. A visual perception-based aircraft cockpit light environment measurement system is established. The aircraft cockpit light environment measurement system includes an imaging device for measuring the light environment inside the aircraft cockpit. The imaging device is used to capture images of the aircraft cockpit scene during the aircraft flight. Based on the aircraft cockpit scene image during flight, and combined with the brightness / grayscale conversion function, the ambient light level of the aircraft cockpit during flight is determined.

[0005] As a preferred method for measuring the light environment of an aircraft cockpit, the skylight simulation light source is used to simulate different skylight environments in the aircraft cockpit.

[0006] As a preferred method for measuring the light environment in an aircraft cockpit, the sky light environment includes, but is not limited to: extremely dark, starlight, moonlight, full moon, clear sky, cloudy sky, sunlight, extremely bright, and glare.

[0007] Compared with the prior art, the beneficial effects of the present invention are at least as follows: by using a ground-based visual perception-based aircraft cockpit light environment calibration system and an aircraft-based visual perception-based aircraft cockpit light environment measurement system, the brightness of the display screen, control panel and its operating devices, and the overall environment surface of the aircraft cockpit can be measured by visual perception imaging; it can measure a specific area or point, or measure the entire cockpit. Attached Figure Description

[0008] Figure 1 This is a typical flowchart of an embodiment of the present invention.

[0009] Figure 2 This is a schematic diagram illustrating the working principle of an embodiment of the present invention. Detailed Implementation

[0010] The present invention will now be described in further detail with reference to specific embodiments and accompanying drawings. It should be noted that these descriptions of embodiments are intended to aid in understanding the invention and do not constitute a limitation thereof. Furthermore, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0011] The aircraft cockpit light environment measurement method can be used to measure the cockpit light environment of different aircraft types. The aircraft types include, but are not limited to: fighter jets, attack aircraft, transport aircraft, combat drones, and civil aircraft.

[0012] The method for measuring the aircraft cockpit light environment includes: A ground-based, vision-based aircraft cockpit lighting environment calibration system is established. This system includes an aircraft simulated cockpit, a simulated skylight source outside the simulated cockpit, and a calibration lighting environment luminance meter and a calibration lighting environment acquisition camera located inside the simulated cockpit. The simulated skylight source simulates different skylight environments for the simulated cockpit. These environments include, but are not limited to: extremely dark, starlight, moonlight, full moon, clear sky, cloudy sky, sunlight, extremely bright, and glare. The calibration lighting environment luminance meter measures the luminance value of the calibration target. The calibration lighting environment acquisition camera captures a target image of the calibration target. Based on the luminance value of the calibration target measured by the luminance meter and the target image captured by the camera, a correspondence between the luminance value of the calibration target and the grayscale value of the target image is determined, i.e., a luminance / grayscale conversion function.

[0013] A vision-based aircraft cockpit lighting environment measurement system is established. This system includes an imaging device for measuring the lighting environment inside the aircraft cockpit. This imaging device is used to capture images of the aircraft cockpit scene during flight.

[0014] Based on the aircraft cockpit scene image during flight, and combined with the brightness / grayscale conversion function, the ambient light level of the aircraft cockpit during flight is determined.

[0015] See Figure 1 At box 101, the Sky Light Simulator is used to simulate the cabin lighting environment of an aircraft during flight, including extremely dark, starlight, moonlight, full moon, sunny, cloudy, sunlight, extremely bright, and glare lighting environments.

[0016] See Figure 1 At box 102, the ambient light intensity of the aircraft cockpit was accurately measured on the ground using an ambient light intensity analyzer.

[0017] See Figure 1 At box 103, an ambient light acquisition camera was used to capture an image of the aircraft cockpit scene.

[0018] See Figure 1 At box 104, an embedded processing platform for measuring the ambient light is used to process the aircraft cockpit scene image and calculate the brightness and contrast information of the aircraft cockpit.

[0019] See Figure 1 At box 105, using an aircraft cockpit measurement system calibrated in a ground-based sky light environment simulation laboratory, the system can measure the brightness of the cockpit displays, cockpit control panels and their operating devices, and the overall cockpit environment surface through visual perception imaging; it can measure a specific area or point, or measure the entire cockpit.

[0020] See Figure 2 At box 201, the brightness value of the calibrated target is measured using a brightness analyzer.

[0021] See Figure 2 At box 202, the grayscale information of the calibrated target image is acquired by the light environment acquisition camera.

[0022] See Figure 2 At box 203, adjust the brightness of the calibrated target, and calculate the brightness / grayscale conversion function by fitting the data obtained from the brightness analyzer and the light environment acquisition camera.

[0023] See Figure 2At box 204, the ambient light acquisition camera acquires the grayscale information of the target image.

[0024] See Figure 2 At box 205, the grayscale information of the target being measured, acquired by the ambient light acquisition camera, is used to calculate the brightness value of the target being measured based on the brightness / grayscale conversion function.

[0025] The above description merely illustrates embodiments of the present invention and is quite specific and detailed; however, it should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this invention patent should be determined by the appended claims.

Claims

1. A method for measuring the light environment in an aircraft cockpit, characterized in that, include: Determine the correspondence between the brightness value of the calibration target for the aircraft cockpit and the grayscale value of the target image, i.e., the brightness / grayscale conversion function; Determine the aircraft cockpit scene image during aircraft flight; as well as, Based on the aircraft cockpit scene image and the brightness / grayscale conversion function, the ambient light level of the aircraft cockpit during flight is determined.

2. The method for measuring the light environment of an aircraft cockpit according to claim 1, characterized in that, A ground-based visual perception-based aircraft cockpit light environment calibration system is established. The aircraft cockpit light environment calibration system includes an aircraft simulated cockpit, a sky light simulated light source located outside the aircraft simulated cockpit, and a calibration light environment luminance meter and a calibration light environment acquisition camera located inside the aircraft simulated cockpit. The luminance / grayscale conversion function is determined based on the luminance value of the calibration target measured by the calibration light environment luminance meter and the target image of the calibration target captured by the calibration light environment acquisition camera.

3. The method for measuring the light environment of an aircraft cockpit according to claim 2, characterized in that, The simulated skylight source provides different skylight environments to the aircraft's simulated cockpit.

4. The method for measuring the light environment of an aircraft cockpit according to claim 3, characterized in that, The sky light environment includes, but is not limited to: extremely dark, starlight, moonlight, full moon, sunny, cloudy, sunlight, extremely bright, and dazzling.

5. The method for measuring the light environment of an aircraft cockpit according to claim 1, characterized in that, A visual perception-based aircraft cockpit light environment measurement system is established, which includes an imaging device for measuring the light environment inside the aircraft cockpit.

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