TW201720364A - Color vision examination method and system for objectively examining color recognition capability of examinee - Google Patents

Abstract

The present invention provides a color vision examination method and system. In the method, a picture storage unit provides a plurality of picture files and the picture files are displayed on a display device, in which the light wavelengths correspondingly displayed in the picture files are different from each other. The method performs a preliminary examination stage to examine if the examinee has color blindness. If the examinee is examined to have color blindness, an advanced examination stage is performed to detect the light wavelengths that the examinee is unable to recognize. The present invention not only examines if the examinee has color blindness, but also examines for specific light wavelengths that the examinee is unable to recognize.

Description

Color vision detection method and system

This creation is about a color vision detection method and system for detecting the color discrimination of a subject.

Ishihara's color blindness test is a common tool for detecting color discrimination, which can be printed on paper or displayed on a computer screen. When performing the test, the subject visually checks the Ishihara's color blindness detection map, and expresses the graphic text presented by the Ishihara's color blindness detection map in a spoken language or other manner (for example, body language) according to the instruction of the tester. When the subject's color discrimination is abnormal, it cannot correctly represent the picture text presented by the Ishihara's color blindness detection map. Therefore, the Ishihara's color blindness detection map can be used to judge the subject's color discrimination abnormality (ie, color blindness).

However, through the Ishihara color blind test chart, it is only possible to check whether there is color blindness, and it is impossible to further detect which color has color blindness. In addition, for those who have poor oral expression ability or have difficulty in expressing, even if their color discrimination is normal, they may not be able to correctly express the graphic text presented by the Ishihara's color blindness test chart, resulting in less objective results. .

In view of this, the main purpose of the present invention is to provide a color vision detection method and system that can objectively detect the color discrimination of the subject.

The color vision detection method is implemented in a color vision detection system. The color vision detection system includes a picture storage unit, a display, an eye image capturing unit and a processing unit. The processing unit connects the picture storage unit, the display and the display unit. The color image capturing unit includes: (a) providing a plurality of image files by the image storage unit, wherein the light wavelengths corresponding to the image files cover the visible light range, and the corresponding light wavelengths are different from each other; a preliminary detection stage: playing, by the display, the image files according to the wavelength of the light, and when displaying the image files, obtaining an eye image of the test subject through the eyeball image capturing unit, so that the processing unit determines the The eyeball image corresponds to whether the motion state of each picture file meets an abnormal condition; (c) an advanced detection phase: when the processing unit determines that the eyeball image is in any of the image files displayed in step (b) When the motion state meets the abnormal condition, the display is controlled to display a plurality of image files whose optical wavelength is lower than and higher than the wavelength of light corresponding to the image file; And (d) when displaying each of the image files described in the step (c), the processing unit acquires the eyeball image of the subject through the eyeball image capturing unit to determine that the eyeball image corresponds to the step (c) It is displayed whether the motion state of each picture file meets the abnormal condition.

The color vision detection system of the present invention comprises: a picture storage unit that stores a plurality of picture files, wherein the light wavelengths corresponding to the image files cover the visible light range, and the corresponding light wavelengths are different from each other; The image capturing device plays the image file; the eyeball image capturing unit is configured to obtain an eyeball image when the test subject views the image files; and a processing unit that connects the image storage unit, the display, and the An eyeball image capturing unit, the processing unit controls the display to play the image files according to the wavelength of the light, and determines whether the eyeball image corresponds to an abnormal condition of the motion state of the image files; when the processing unit determines the eyeball When the motion state of any of the image files meets the abnormal condition, the display controls the display to display a plurality of image files whose optical wavelength is lower than and higher than the wavelength of the light corresponding to the image file, and determines that the eyeball image corresponds to the middle image Whether the motion state of each picture file meets the abnormal condition.

According to the detection method and system of the present invention, firstly, in step (c), the light wavelength of the abnormality of the subject is recognized, and then in step (c) and step (d), the light wavelengths of the test object are further detected. There is a case of abnormal recognition, so compared with the prior art, this creation can not only detect the abnormal color discrimination of the subject, but also detect which light wavelengths the subject has identified to reflect the measured. The person really feels the color of the obstacle. On the other hand, the motion state of the subject's eyeball recognition color is a reflection motion, and the creation is based on the eyeball image to judge the color discrimination of the subject, so it is not necessary to pass the oral or physical expression of the subject, so that the creation is The test results are more objective.

The color vision detection method is implemented in a color vision detection system. Referring to FIG. 1, the color vision detection system includes a picture storage unit 10, a display 20, an eyeball image capturing unit 30, and a processing unit 40.

In an embodiment, please refer to FIG. 2 and FIG. 3 , the display 20 and the eyeball image capturing unit 30 can be disposed in a head mounted housing 50 to form a head mounted detecting device, but not limited thereto. . The head-mounted housing 50 includes an opening 51 and an accommodating space 52 communicating with the opening 51. The opening 51 is curved to conform to the shape of the face of the subject; the eye-catching unit 30 can include one or In the embodiment, the two cameras 31 are exemplified, but the two cameras 31 are oppositely disposed on the top side of the accommodating space 52 of the head mounted housing 50. Corresponding to the position of the left and right eyeballs of the subject, the display 20 can be a light-emitting device such as a liquid crystal display (LCD) or a light-emitting diode (LED), and is disposed in the receiving space of the head-mounted housing 50. The other side of 52 is opposite to the opening 51. Therefore, when the face of the subject is placed on the opening 51 of the head-mounted housing 50, the subject can view the image presented by the display 20, and the eyeball image capturing unit 30 captures the eye movement of the subject. The head mounted housing 50 can isolate external light, allowing the subject to focus on viewing the image of the display 20 from ambient light.

The picture storage unit 10 can be a general hard disk (HDD), a solid state drive (SSD), a cloud hard drive, or other device that can store digital content. The processing unit 40 can be a computer with computing processing capability, such as a notebook computer or a desktop computer. The processing unit 40 can be connected to the image storage unit 10 and the display unit 20 to the eyeball image capturing unit 30 in a wired or wireless manner. Line for data transfer.

Referring to FIG. 4, the method for detecting color vision detection includes the following steps:

Step S101: providing a plurality of image files. The image storage unit 10 stores a plurality of image files, the light wavelengths corresponding to the image files are different from each other, and the image files can be geometrically displayed, and the color display can be displayed in multiple colors in addition to the monochrome display. In an embodiment, the image files are a first image file, a second image file, a third image file, and an n-th image file, and the light wavelength corresponding to the first image file is x. Nano, the wavelength of the light corresponding to the second image file is x+y nanometer, the wavelength of the light corresponding to the third image file is x+2y nanometer, and so on, the light corresponding to the nth image file The wavelength is x+(n-1)y nanometer, and the wavelength of light corresponding to the first image file to the nth image file covers a visible light range (for example, 400 nm to 700 nm), wherein x is a light The wavelength reference value can be used as the starting point of the visible light range, and y is the difference amount of the light wavelength corresponding to the two adjacent image files. For example, the wavelength of the light corresponding to the first image file may be 400 nm (ie, x=400), and when y=5, the wavelength of the light corresponding to the second image file is 405 nm, the third image file. The corresponding wavelength of light is 410 nm, and so on.

Step S102: Preliminary detection phase: detecting whether the subject is color blind. The processing unit 40 controls the display unit 20 to play the image files according to the size of the light wavelength, and when displaying the image files, the eyeball image capturing unit 30 obtains an eyeball image of the subject by the processing unit 40. It is determined whether the eyeball image corresponds to an abnormal condition of the motion state of each of the image files.

In an embodiment, the processing unit 40 controls the display 20 to display backwards from the first picture file according to a range of M nanometers. Taking M=30 as an example, the display 20 sequentially displays corresponding to the light. The first picture file having a wavelength of 400 nm (ie, a full purple picture), the seventh picture file corresponding to a light wavelength of 430 nm, the 13th picture file corresponding to a light wavelength of 460 nm, and so on. Until the last stroke of the picture files in the picture storage unit 10 is displayed. It should be noted that the human eye can have a clear perception of the wavelength change of light above 30 nm, so the M nanometer interval is at least 30 nm.

On the other hand, when the display 20 displays each of the image files of the foregoing step S102, the eyeball image capturing unit 30 captures an eyeball image of the subject and transmits the eyeball image to the processing unit 40. The processing unit 40 The image processing method determines that the eyeball image corresponds to the motion state of each of the image files. For example, if the subject can normally interpret the image presented by the display 20, the eye movement is more active, and the eye image is a dynamic image; otherwise, if the subject has questions about the image displayed by the display 20 or When it is impossible to interpret, the eye movement will be stagnant for a long time, and the eyeball image is a still image.

Therefore, when the processing unit 40 determines that the static time of the eyeball image reaches a threshold time, it can be determined that the abnormal condition is met. For example, when the eye image of the subject is at rest for a threshold time of 10 seconds, it is judged that the abnormal condition is met.

Step S103: Advanced detection phase: detecting the wavelength of light in which the subject feels that the obstacle is recognized. When the processing unit 40 determines that the motion state of any of the picture files displayed in step S102 meets the abnormal condition, the representative unit has a recognition obstacle for the light wavelength corresponding to the image file. In this case, the processing unit 40 controls the display 20 to sequentially display a plurality of image files whose optical wavelength is lower than a wavelength of light corresponding to the optical wavelength corresponding to the image file.

In an embodiment, when the processing unit 40 determines that the motion state of an ith image file in the image file displayed in step S102 meets the abnormal condition, the representative object represents the ith image file. The processing unit 40 controls the display 20 to sequentially display an i-1th image file, an i-1+ (M/y) of the image files in the image storage unit 10. Image file and an i-1+2 (M/y) picture file, and an i+1 picture file, an i+1+(M/y) picture file and an i+1+2 (M) /y) Image file. The optical wavelength of the i-1th image file is lower than the optical wavelength of the ith image file, and the optical wavelength of the (i+1)th image file is lower than the optical wavelength of the ith image file.

For example, when the processing unit 40 determines that the subject has a recognition obstacle for the seventh picture file (i=7), the processing unit 40 controls the display unit 20 to sequentially display the sixth picture file and the twelfth picture file. The 18th picture file, and the eighth picture file, the 14th picture file and the 20th picture file are sequentially displayed. Wherein, the wavelength interval between the sixth picture file, the twelfth picture file and the 18th picture file is 30 nm, and the wavelength interval between the eighth picture file, the 14th picture file and the 20th picture file is 30 nm. .

Step S104: Determine the degree of color vision disorder. When the image file described in step S103 is displayed, the processing unit 40 obtains the eyeball image of the subject through the eyeball image capturing unit 30, to determine that the eyeball image corresponds to each image file displayed in step S103. Whether the motion state meets the abnormal condition. In this way, since the wavelength of the light displayed in step S104 is the wavelength of the light that the subject feels the obstacle in step S102, the determination result of the processing unit 40 in step S104 can reflect the wavelength of the light that the subject actually feels obstructed.

Further, in step S104, when the processing unit 40 determines that the motion state of the eyeball image corresponding to the image file displayed in step S103 still meets the abnormal condition, the processing unit 40 may further control the display 20 to display An image file of a first-order wavelength range, and determines whether the eye image corresponds to whether the image file still conforms to the abnormal condition. For example, an i-2 image file, an i-2+ (M/y) image file, an i-2+2 (M/y) image file, and an i+2 image file are sequentially displayed. An i+2+(M/y) picture file and an i+2+2 (M/y) picture file.

When the processing unit 40 determines that the eyeball image corresponds to the i-th-2, i-2+ (M/y), i-2+2 (M/y), i+2, i+2+ (M/ y) and any one of the i+2+2 (M/y) picture files still meets the abnormal condition, then the display 20 is controlled to display the picture file of the next-order optical wavelength range, that is, the i-th is displayed. 3. i-3+(M/y), i-3+2(M/y), i+3, i+3+(M/y) and i+3+2(M/y) picture files, And determining whether the eyeball image corresponds to any of the image files meets the abnormal condition, and so on, until the processing unit 40 determines that the eyeball image does not meet the abnormal condition, and further determines that the measured object recognizes the abnormal light wavelength.

10‧‧‧ Picture storage unit
20‧‧‧ display
30‧‧‧eyeball imaging unit
31‧‧‧ camera
40‧‧‧Processing unit
50‧‧‧ head mounted housing
51‧‧‧ openings
52‧‧‧ accommodating space

Figure 1: Schematic block diagram of the color vision detection system of the present invention. Figure 2: Schematic view of the stereoscopic appearance of the head-mounted detection device of the present invention. Figure 3: A top plan view of the head-mounted detection device of the present invention. Figure 4: Flow chart of the method for detecting color perception.

Claims (10)

A color vision detection method is implemented in a color vision detection system, the color vision detection system includes a picture storage unit, a display, an eye image capturing unit and a processing unit, the processing unit is connected to the picture storage unit, the display And the eye color detecting unit, the color vision detecting method includes: (a) providing, by the image storage unit, a plurality of image files, wherein the light wavelengths corresponding to the image files cover the visible light range, and the corresponding light wavelengths are different from each other; b) preliminary detection stage: the display plays the picture files according to the wavelength of the light, and when displaying each picture file, obtains an eye image of the test subject through the eyeball image capturing unit, to be judged by the processing unit The eyeball image corresponds to whether the motion state of each image file meets an abnormal condition; (c) advanced detection phase: when the processing unit determines that the eyeball image is in any of the image files displayed in step (b) When the motion state meets the abnormal condition, the display is controlled to display a plurality of image files whose optical wavelength is lower than and higher than the wavelength of light corresponding to any of the image files. And (d) when displaying each of the image files described in the step (c), the processing unit acquires the eyeball image of the subject through the eyeball image capturing unit to determine that the eyeball image corresponds to the step (c) It is displayed whether the motion state of each picture file meets the abnormal condition. The color vision detection method of claim 1, wherein: in the step (a), the image files are a first image file, a second image file, a third image file, ..., a In the nth picture file, the wavelength of the light corresponding to the first picture file is x nanometer, and the wavelength of the light corresponding to the second picture file is x+y nanometer, and the wavelength of the light corresponding to the third image file is x+ 2y nano, and so on, where x is the starting point of the visible light range, and y is the difference amount of the wavelength of light corresponding to two adjacent image files; in the step (b), the processing unit controls the The display is displayed from the first picture file at intervals according to a range of M nanometers, and when each picture file is displayed, the eyeball image of the subject is obtained through the eyeball image capturing unit to determine that the eyeball image corresponds to In the step (c), the image file is an ith image file, and the processing unit determines that the movement state of the eye image in the ith image file conforms to the abnormality In the condition, the display is controlled to sequentially display an i-1th image file in the plurality of image files. An i-1+ (M/y) picture file and an i-1+2 (M/y) picture file, and an i+1 picture file, an i+1+ (M/y) picture File and an i+1+2 (M/y) picture file. The color vision detecting method according to claim 2, wherein in the step (d), when each of the image files described in the step (c) is displayed, the processing unit acquires the eyeball image of the subject Determining, by the eyeball image, the motion state of each of the image files described in the step (c), to determine whether the eyeball image corresponds to the motion state of each of the image files displayed in the step (c). The abnormal condition; if the abnormal condition is met, further controlling the display to sequentially display an i-2 image file, an i-2+ (M/y) image file, and an i-2+2 (M/y) ) picture file, and an i+2 picture file, an i+2+ (M/y) picture file and an i+2+2 (M/y) picture file, and determine that the eye image corresponds to Whether the motion state of each of the picture files meets the abnormal condition; and so on, until the processing unit determines that the eyeball image does not meet the abnormal condition. The color vision detecting method according to claim 1, wherein the processing unit determines that the static time of the eyeball image reaches a threshold time, and determines that the abnormal condition is met. The color vision detecting method according to claim 2 or 3, when the processing unit determines that the static time of the eyeball image reaches a threshold time, it is determined that the abnormal condition is met. The color vision detecting method according to claim 2 or 3, wherein x = 400, y = 5, and M = 30. The color vision detecting method according to claim 5, wherein x=400, y=5, and M=30. A color vision detection system, comprising: a picture storage unit, which stores a plurality of picture files, wherein the image wavelengths correspond to a visible light range, and the corresponding light wavelengths are different from each other; a display, which is used to The image player plays the image files; the eyeball image capturing unit is configured to obtain an eyeball image when the test subject views the image files; and a processing unit that connects the image storage unit, the display, and the eyeball An image capturing unit, the processing unit controls the display to play the image files according to the wavelength of the light, and determines whether the eyeball image corresponds to an abnormal condition of the motion state of the image files; when the processing unit determines the eyeball image When the motion state of any of the picture files meets the abnormal condition, controlling the display to display a plurality of picture files whose optical wavelength is lower than and higher than the wavelength of the light corresponding to the image file, and determining that the eye image corresponds to each of the images Whether the motion state of the picture file meets the abnormal condition. The color vision detection system of claim 8, wherein the image files stored by the image storage unit are a first image file, a second image file, a third image file, ..., an n image file. The wavelength of the light corresponding to the first image file is x nanometer, and the wavelength of the light corresponding to the second image file is x+y nanometer, and the wavelength of the light corresponding to the third image file is x+2y nanometer. And so on, where x is the starting point of the visible light range, and y is the difference amount of the wavelength of light corresponding to the two adjacent image files. The color vision detecting system according to claim 8 or 9, when the processing unit determines that the stationary time of the eyeball image reaches a threshold time, it is determined that the abnormal condition is met.