JP2007122340A - Image display system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an image display system that enables various types of colorblind persons to recognize colors as correctly as possible. <P>SOLUTION: If protanopia/deuteranopia is selected and a captured image includes areas satisfying expressions (1) and (2) (#2, #3: YES), edge areas of the areas are detected, and images are displayed on LCDs in which white lines are added to the edge areas by superposition and data of G (green) in the areas satisfying the expression (1) is replaced by data of B (blue) (#4, #5). If tritanopia is selected (#2: NO, #7: YES) and the captured image includes areas satisfying expressions (3) to (5) (#8: YES), edge areas of the areas are detected, and images are displayed on the LCDs in which white lines are added to the edge areas by superposition (#9, #10). <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an image display system that is attached to a head or a face and allows a color blind person to recognize a correct color.

  2. Description of the Related Art Conventionally, spectacles for correcting colors using a special filter that transmits only a specific color and weakens the transmittance of other colors to a person with color blindness have been proposed.

  On the other hand, in Patent Document 1 below, correction values set in advance for brightness, hue, saturation, perspective, visual field, etc. relating to the vision of the elderly, visually impaired, and visually impaired are stored, and the interior of the building is stored. Alternatively, a technique is disclosed in which when an outdoor image is captured by a CCD camera, the captured image is corrected with the correction value and output to a display.

Patent Document 2 below discloses a color liquid crystal panel for displaying an index, an optical system for guiding an index image from the color liquid crystal panel to the eyes of a subject, and a movement for moving the color liquid crystal panel in the optical axis direction of the optical system. A face-mounted type visual function inspection device having a mirror body composed of a mechanism on the left and right is disclosed. Moreover, this patent document 2 describes that a visual inspection index image formed with spots of a plurality of colors is provided to a subject using this visual function inspection device to perform a color vision inspection.
JP 2001-175158 A Japanese Patent Laid-Open No. 11-244239

  In eyeglasses that correct colors using a special filter that transmits only certain colors and weakens the transmittance of other colors to people with color blindness, the amount of transmitted light decreases, so the brightness of the subject image Decreases as a whole, and the visibility of the subject image decreases. In addition, there are a plurality of types of color blindness, and the method using the filter may be effective for certain types of color blindness but less effective for other types of color blindness.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to realize an image display system that enables various color blind persons to recognize the correct colors as much as possible.

  The invention according to claim 1 is an image display system configured to allow communication between an image display device attached to a head or a face and a control device that controls the operation of the image display device, the control device Is a color vision abnormality input by the input means for an image obtained by an imaging operation of an imaging means for receiving a light image of a subject and performing a photoelectric conversion operation. Image processing means for performing predetermined image processing according to the type of image processing, and display control means for displaying the image after image processing on the image display device, wherein the image display device provides instructions to the display control means. It is characterized by comprising display means for receiving and displaying the image after the image processing.

  According to this invention, the image obtained by the imaging operation of the imaging unit is subjected to predetermined image processing according to the type of color vision abnormality, and the image after the image processing is displayed on the display unit. Regardless of the type of color blindness, it is possible for a color blind person to recognize the correct color as much as possible.

  As the image processing for the image, for example, as in the invention according to claim 2, a region of a predetermined color is detected from an image obtained by an imaging operation of the imaging operation by the imaging unit, and the color of the region is determined. A process of replacing the predetermined color with a color different from the predetermined color may be performed, or the image processing unit may be obtained by an imaging operation of an imaging operation by the imaging unit. A process of detecting a predetermined color area in the obtained image and superimposing a line of a predetermined color different from the predetermined color on the edge portion of the area may be performed.

  According to a fourth aspect of the present invention, in the image display system according to any one of the first to third aspects, the control device has a display luminance for performing an input for adjusting a display luminance when displaying on the display means. Adjusting means, wherein the image processing means detects a predetermined color area in an image obtained by an imaging operation by the imaging means when performing display for a predetermined color vision abnormality, and the display control means The region of the predetermined color detected by the image processing unit is adjusted to the display luminance input by the display luminance adjusting unit.

  According to the present invention, the user (color blind person) of the image display system can adjust the display brightness according to his / her color vision abnormality.

  According to a fifth aspect of the present invention, in the image display system according to any of the first to fourth aspects, the image display device is configured such that a user can see through the outside world. is there.

  According to the present invention, since the image display device is configured so that the user can see through the outside world, the user can visually recognize both the image of the subject in the outside world and the display image.

  A sixth aspect of the present invention is the image display system according to any one of the first to fifth aspects, wherein the image-processed image is guided to one eyeball of a user.

  According to the present invention, it is possible to provide an image obtained by performing image processing on one eyeball of a color blind person according to the color vision abnormality.

  According to a seventh aspect of the present invention, in the image display system according to any one of the first to fifth aspects, the image-processed image is guided to both eyes of the user.

  According to the present invention, it is possible to provide an image that has been subjected to image processing in accordance with the color vision abnormality on both eyeballs of color blind people.

  According to the first to third aspects of the present invention, it is possible to realize an image display system capable of recognizing various color blind persons as correct colors as possible (colors recognized by persons having normal color vision). Can do.

  According to the fourth aspect of the present invention, the user (color blind person) of the image display system can display on the image display device an image with good visibility according to his / her color vision abnormality.

  According to the fifth aspect of the present invention, in the image display system capable of visually recognizing both the image of the subject in the outside world and the display image, the color blind person can be made to recognize the correct color as much as possible.

  According to the sixth and seventh aspects of the invention, it is possible to provide an image with good visibility to one or both eyes of a color blind person.

  An embodiment of an image display system according to the present invention will be described. As shown in FIG. 1, the image display system 100 includes a head-mounted image display device (head mounted display (HMD)) 1 that is disposed and used near a user's eyeball, and an image display device. A control box 50 that is configured to be communicable with the image display device 1, performs image processing relating to color vision abnormality on a captured image transmitted from the image display device 1, and causes the image display device 1 to display the image. It is prepared for. The control box 50 corresponds to the control device.

  2 is a front view showing a configuration of an embodiment of an image display system according to the present invention, FIG. 3 is a plan view with respect to FIG. 2, and FIG. 4 is a right side view with respect to FIG. It is assumed that a three-dimensional coordinate system is set in which the horizontal direction in FIG. 2 is the X axis, the vertical direction is the Y axis, and the direction orthogonal to the paper surface is the Z axis.

  As shown in FIGS. 2 to 4, the image display device 1 includes first and second transparent substrates 2 and 3, a bridge 4, frames 5 and 6, a camera unit 7, and display housings 8 and 9. It is comprised.

  The first and second transparent substrates 2 and 3 are U-shaped / substantially flat transparent bodies provided corresponding to the left and right eyeballs, respectively. As will be described later, the display housings 8 and 9 are fitted in a space formed by being surrounded by the first and second transparent substrates 2 and 3.

  The bridge 4 is a short rod-like member that spans a predetermined position facing each other of the first and second transparent substrates 2 and 3 that are arranged parallel to the XY plane and arranged in the X-axis direction. 2 and the second transparent substrate 3 are held in a relative positional relationship through a certain gap.

  The frames 5 and 6 are long members made of a flexible elastic material or the like. The frames 5 and 6 are hooked on the user's ears or the temporal region, and are held on the head of the image display device 1. This is for adjusting the mounting position. The frames 5 and 6 are configured to be rotatable in the directions of arrows P and Q in the rotating portions 5a and 6a. When the image display device 1 is not used, the frames 5 and 6 are indicated by the arrows P and It can be made compact by rotating in the Q direction along the first and second transparent substrates 2 and 3.

  The camera unit 7 captures a subject in front of the user's eyes, and is attached to, for example, one frame 5. FIG. 5 is a cross-sectional view showing the internal configuration of the camera unit 7. As shown in FIG. 5, the camera unit 7 takes a lens unit 11 in which a zoom lens optical system is arranged in a cylindrical housing 10 and an optical image of a subject guided by the lens unit 11 (photoelectric sensor). Image sensor 12 to be converted), an image sensor substrate 13 that supports the image sensor 12, and a cable 14 for transmitting a pixel signal obtained by the imaging operation of the image sensor 12 to a control box 50 described later. Has been. The variable power lens group and the focus lens group of the lens unit 11 are configured to be driven in the optical axis direction by a motor (not shown), and the display magnification is changed when the variable power lens group is driven in the optical axis direction. When the focus lens group is driven in the optical axis direction, focus adjustment is performed.

  The image pickup device 12 performs photoelectric conversion into image signals of R, G, and B components according to the amount of light of the subject light image formed by the lens unit 11. The image sensor 12 has R (red), G (green), and B (blue) color filters in a checkered pattern on the surface of each CCD of an area sensor in which CCDs (Charge Coupled Devices) are two-dimensionally arranged. It is composed of a single-plate type color area sensor that is affixed to a so-called Bayer system. As the image pickup element 12, a CCD image sensor, a CMOS image sensor, a VMIS image sensor, or the like can be employed.

  The display housings 8 and 9 have the same configuration, and display an image (video) taken by the camera unit 7 and provide it to the eyeball. FIG. 6 is a cross-sectional view taken along the line AA in FIG. 2 and mainly shows the internal configuration of the display housings 8 and 9.

  As shown in FIG. 6, the display housings 8 and 9 include a housing portion 15, an LED (Light Emitting Diode) 16, a collimator lens 17, an LCD (Liquid Crystal Display) 18, a prism 19, and a HOE (HOE). Holographic Optical Element) 20, with the LED 16, the collimator lens 17, and the LCD 18 built in the housing portion 15, the housing portion 15 is located obliquely upward at the upper end of the prism 19 (right oblique in FIG. 6). It is attached in a manner that protrudes upward.

  The LED 16 is a point light source composed of a white light emitting diode (LED) including a predetermined wavelength color. The collimator lens 17 makes the light from the LED 16 substantially parallel and projects it onto the LCD 18. The LCD 18 generates video based on the image signal of the camera unit 7 and is, for example, a transmissive liquid crystal display panel.

  The prism 19 is a substantially plate-like transparent member made of glass, transparent resin, or the like, and reflects light from the LCD 18 a plurality of times inside. The upper end portion of the prism 19 is formed with a thick portion 19a whose front side is formed in a wedge shape so as to be thicker upward so that most of the light from the LCD 18 can be collected inside. .

  A tapered surface 19b is formed at the lower end of the prism 19, and the prism 19 is joined to the tapered surfaces 2a and 3a formed on the first and second transparent substrates 2 and 3 via the HOE 20 ( For example, it is bonded. The front and back surfaces of the prism 19 are flush with the front and back surfaces of the first and second transparent substrates 2 and 3. Thus, the prism 19 is integrated with the first and second transparent substrates 2 and 3 in a single plate shape.

  The HOE 20 is a volume phase type hologram optical element having a positive power, which is configured by a so-called free-form surface that is optically axisymmetric, and is supported at a lower end portion of the prism 19 with a predetermined inclination angle. The HOE 20 irradiates the light guided by the prism 19 to provide a hologram image to the eyeball using the light interference phenomenon.

  In the display housings 8 and 9 having the above configuration, the light emitted from the LED 16 illuminates the LCD 18 through the collimator lens 17, and a plurality of subject lights generated by the LCD 18 by this illumination are within the prism 19. After the total reflection is performed once, it is diffracted by the HOE 20 and guided to the user's eyeball as a virtual image.

  Furthermore, the prism 19 guides light incident from the front to the user's eyeball. As a result, the user can see through the outside world (front subject) and can visually recognize the image (video) taken by the camera unit 7 superimposed on the outside world (front subject).

  The tapered surfaces 2a and 3a formed on the first and second transparent substrates 2 and 3 cancel (cancel) light refraction at the tapered surface 19b of the prism 19, that is, due to the prism effect on the tapered surface 19b. In order to prevent the light from the arrow W side from bending upward, the user can observe the external light through the prism 19, the first and second transparent substrates 2, 3 and the HOE 20 without distortion.

  Next, the configuration of the control box 50 will be described. FIG. 7 is an external view of the control box 50.

  As shown in FIG. 7, the control box 50 includes a power ON / OFF input unit 51, a color blindness type input unit 52, a color weak color input unit 53, and a luminance change dial 54.

  The power ON / OFF input unit 51 is a two-contact type switch that slides in the horizontal direction, and is used to switch the main power ON / OFF of the control box 50 by sliding the knob 51a in the horizontal direction (left-right direction). Is.

  The color vision abnormality type input unit 52 is for inputting the type of color vision abnormality. In this embodiment, the types of color vision abnormality include the first color vision abnormality, the second color vision abnormality, the third color vision abnormality, and the abnormal three color vision. Is assumed. Here, the color vision abnormality will be briefly described with reference to FIG.

  The human eye (retina) has cone-shaped cells called cones, and colors are identified by the cones. That is, the cones include a red-sensitive cone, a green-sensitive cone, and a blue-sensitive cone, and the color of an object is recognized by light received by each cone. However, if a defect or abnormality occurs in some or all of the cones, an abnormality (color vision abnormality) occurs in color recognition and identification. FIG. 8 is a diagram showing the types of color vision abnormalities and the details of the abnormalities. In FIG. 8, “R”, “G”, and “B” indicate red, green, and blue light, “◯” indicates that the color can be recognized and identified, and “×” indicates the color. “Δ” means that it is difficult to recognize or identify a color.

  As shown in FIG. 8, when it is normal, all colors of R (red), G (green), and B (blue) can be recognized. On the other hand, as shown by the arrow B in FIG. 8, the first color vision abnormality cannot distinguish the color of R (red), and therefore cannot accurately recognize purple, green and red. Further, since the second color vision abnormality cannot distinguish the color of G (green), purple and green cannot be accurately recognized. Since the third color vision abnormality cannot discriminate the color of B (blue), purple, blue, green and yellow cannot be accurately recognized.

  Further, as indicated by an arrow C in FIG. 8, the abnormal three-color vision is an abnormality in which one of R (red), G (green), and B (blue) is difficult to recognize, and the color of R (red) There is a first weak color that is difficult to recognize, a second weak color that is difficult to recognize G (green) color, and a third weak color that is difficult to recognize B (blue) color.

  In the present embodiment, the first color vision abnormality, the second color vision abnormality, the third color vision abnormality, and the abnormal three color vision are targeted, and image processing corresponding to each color vision abnormality is performed on the image captured by the camera unit 7. It is configured. The color vision abnormality type input unit 52 is composed of a three-contact type switch that slides in the horizontal direction. By sliding the knob 52a in the horizontal direction in FIG. 7, one of the color vision abnormality types is selected alternatively. It has become so. Note that the first color vision abnormality and the second color vision abnormality are included in one selection type because they are substantially the same color recognition mode and can be handled by the same display processing.

  In addition to the types shown in FIG. 8, there are color vision abnormalities in which two of the three cones do not function or all of the cones do not function.

  The color weak color input unit 53 is used to input a color that is difficult to recognize (hereinafter referred to as a color weak color) when the user has an abnormal three-color vision. It consists of a three-contact type switch that slides, and by sliding the knob 53a in the horizontal direction, a weak color is selected alternatively from R (red), G (green), and B (blue).

  The brightness change dial 54 is for changing the display brightness of the image display device 1 (LCD 18). For example, when the dial is rotated clockwise, the amount of display light increases in proportion to the amount of rotation, and counterclockwise. When rotated, the amount of display light decreases in proportion to the amount of rotation.

  FIG. 9 is a block diagram showing an electrical configuration of the image display system 100.

  As shown in FIG. 9, the image display system 100 includes a camera unit 7, an LCD 18, a signal processing unit 21, an A / D conversion unit 22, a timing control circuit 23, an image memory 24, a VRAM 25, and an input. An operation unit 29 and a control unit 26 are provided.

  The camera unit 7 corresponds to the camera unit 7 shown in FIGS. 2, 3, and 5, and photographs a subject in front of the user wearing the image display device 1. The LCD 18 corresponds to the LCD 18 shown in FIG. 6 and displays an image based on the image data obtained by the camera unit 7.

  The signal processing unit 21 performs predetermined analog signal processing on the analog image signal output from the image sensor 12. The signal processing unit 21 includes a CDS (correlated double sampling) circuit and an AGC (auto gain control) circuit. The CDS circuit reduces noise of the image signal, and the AGC circuit adjusts the level of the image signal.

  The A / D conversion unit 22 converts the analog R, G, and B pixel signals output from the signal processing unit 21 into digital pixel signals composed of a plurality of bits (for example, 10 bits). The signal after the A / D conversion process of the A / D conversion unit 22 is referred to as image data.

  The timing control circuit 23 generates clocks CLK1 and CLK2 based on the reference clock CLK0 output from the control unit 26. The clock CLK1 is supplied to the image sensor 12 (see FIG. 5) in the camera unit 7, and the clock CLK2 is also supplied. The operations of the image sensor 12 and the A / D converter 22 are controlled by outputting them to the A / D converter 22 respectively.

  The image memory 24 is a memory used as a work area for performing various processing on image data by the control unit 26. The VRAM 25 has an image signal recording capacity corresponding to the number of pixels of the LCD 18, and is a pixel signal buffer memory constituting an image reproduced and displayed on the LCD 18.

  The input operation unit 29 includes the power ON / OFF input unit 51, the color vision abnormality type input unit 52, the color weak color input unit 53, and the luminance change dial 54 described above. The color blindness type input unit 52 and the weak color input unit 53 constitute the input unit, and the luminance change dial 54 corresponds to a display luminance adjusting unit.

  The control unit 26 reads a ROM (Read Only Memory) that stores each control program, a RAM (Random Access Memory) that temporarily stores data such as arithmetic processing and control processing, and the control program from the ROM. It comprises a CPU (central processing unit) to be executed, etc., and receives a signal from a shooting start switch (not shown) to control the imaging operation of the camera unit 7 and the display operation of the LCD 18. In the present embodiment, the control unit 26 is mounted on the control box 50.

  In this embodiment, the control unit 26 has functions as an image processing unit 27 and a display control unit 28 as shown in FIG. 9 in order to improve the visibility of the image of the color blind person.

  The image processing unit 27 performs image processing corresponding to the type of color vision abnormality selected by the color vision abnormality type input unit 52 on the image photographed by the camera unit 7. That is, the pixel values of each color of R (red), G (green), and B (blue) output from the A / D conversion unit 22 are represented as P (R), P (G), and P (B). Then, when the color vision abnormality type of the first and second color vision abnormality is selected by the color vision abnormality type input unit 52, the image processing unit 27 performs the pixel values P (R), P (G), and P (B). A region that satisfies the following formula (1) or formula (2) is detected.

P (R) / P (G) ≧ 1.5, P (G)> P (B) (1)
| P (R) −P (B) | ≦ 30, P (R)> P (G), P (B)> P (G)
... (2)
In addition, “30” in the formula (2) is a numerical value expressed in 8 bits (256 tone).

  The region represented by the formula (1) is a region recognized as a color in a range from green to light green by a normal person, and from black to brown for a color blind person having first and second color blindness. It is an area recognized as the color of. The region represented by the formula (2) is a region that is recognized by a normal person as a color ranging from a dark orange color to a red color, and is a brown color to a black color range for a color blind person having first and second color vision abnormalities. Is recognized as a color.

  When the image processing unit 27 detects a region satisfying the expressions (1) and (2), the image processing unit 27 detects an edge (end) of the region and superimposes a white line (line) on the edge region. By performing image processing to be added, an image in which the color of the edge region is approximated to a color recognized by a normal color vision person is generated. Thereby, the area | region where the white line was added among the area | regions recognized by the color blind person who has the 1st, 2nd color vision abnormality as a color of the black to brown range shown by said Formula (2) is dark orange. To a red color range is recognized by a color blind person having first and second color vision abnormalities.

  However, since the color blind person having the first and second color blindness cannot distinguish between green and red, the color blind person having the first and second color blindness shown in the formula (1) is changed from black to brown. Even if a process of adding a white line in a superimposed manner to the edge area of the area recognized as the color of the range, the color blind person can identify whether the edge area is green or red. Can not. Therefore, in the present embodiment, an image is generated by replacing G (green) data in a region satisfying the expression (1) with B (blue) data.

  Further, when the third color vision abnormality is selected by the color vision abnormality type input unit 52, the image processing unit 27 performs the following (3) to (3) on the pixel values P (R), P (G), and P (B). An area satisfying any one of 5) is detected.

P (G) / P (B) ≦ 2, P (G)> P (R) (3)
P (B) / P (R) ≧ 2, P (B) / P (G) ≧ 2 (4)
P (R) / P (G) ≧ 2, P (B) / P (G) ≧ 1.5 (5)
The region represented by the expression (3) is a region that is recognized as a color in a range from green to light green by a normal person, and a region that is recognized as light blue by a color blind person having a third color vision abnormality. It is. The region represented by the formula (4) is a region that is recognized as blue by a normal person, and is a region that is recognized as black by a color blind person having a third color vision abnormality. The region indicated by (5) is a region that is recognized as purple by a normal person, and is a region that is recognized as red by a color blind person having a third color vision abnormality.

  When the image processing unit 27 detects a region satisfying the expressions (3) to (5), the image processing unit 27 detects an edge (end) of the region and generates an image in which a white line is added to the edge region. . As a result, among the areas recognized by the color blind person having the third color vision abnormality as light blue shown by the expression (3), the area to which the white line is added is green, and is expressed by the expression (4). Of the regions recognized as black by the color blind person having the third color blindness, the region to which the white line is added is blue, and the color blind handicapped person having the third color blindness represented by the above formula (5) Among the regions recognized as red, the region to which the white line is added is purple and is recognized by the color blind person having the third color vision abnormality.

  The display control unit 28 displays the image generated by the image processing unit 27 on the LCD 18, and when an abnormal 3 color vision is selected by the color vision abnormality type input unit 52, the display is input by the color weak color input unit 53. The color area is changed to a luminance value corresponding to the rotation direction and the rotation amount of the luminance change dial 54.

  Next, image display processing by the control unit 26 will be described. FIG. 10 is a flowchart showing this image display processing.

  As shown in FIG. 10, when the main power is turned on by a power button (not shown) (YES in step # 1), control unit 26 determines the selection content by color blindness type input unit 52 (step # 2). . When the control unit 26 determines that the first and second color blindness abnormalities are selected by the color blindness type input unit 52 (YES in step # 2), the control unit 26 uses the above formulas (1), ( It is determined whether or not there is a region satisfying 2) (step # 3).

  As a result, if the control unit 26 determines that there is a region that satisfies the equation (1) or (2) (YES in step # 3), it detects an edge of the region that satisfies the equation (1) or (2). (Step # 4) A white line is added to the detected edge, and an image in which G (green) data is replaced with B (blue) data in the region satisfying equation (1) is displayed on the LCD 18 (step # 4). # 5). On the other hand, if the control unit 26 determines that there is no region satisfying the above expressions (1) and (2) (NO in step # 3), the control unit 26 takes a picture by the camera unit 7 without performing the process for the color blind person. An image faithful to the image is displayed on the LCD 18 (step # 6).

  If the control unit 26 determines that the third color vision abnormality has been selected by the color vision abnormality type input unit 52 (NO in step # 2 and YES in # 7), the equation (3) is obtained for the image photographed by the camera unit 7. It is determined whether or not there is a region satisfying (5) (step # 8).

  As a result, when the control unit 26 determines that there is a region that satisfies any of the equations (3) to (5) (YES in step # 8), it satisfies any of the equations (3) to (5). An edge of the area is detected (step # 9), and an image with a white line added to the detected edge is displayed on the LCD 18 (step # 10). On the other hand, if control unit 26 determines that there is no region that satisfies the above equations (3) to (5) (NO in step # 8), it performs step # 6.

  When the controller 26 determines that the abnormal color vision is selected by the color vision abnormality type input unit 52 (NO in steps # 2 and # 7), the controller 26 determines whether or not the color weak color is input by the color weak color input unit 53 ( Step # 11). If a weak color is not input, the control unit 26 stands by until a weak color is input (NO in step # 11). If a weak color is input (YES in step # 11), the luminance change dial is displayed. It is determined whether or not operation 54 has been performed (step # 12).

  When the brightness change dial 54 is operated (YES in Step # 12), the control unit 26 changes the display brightness of the image to a brightness value corresponding to the rotation direction and the rotation amount of the brightness change dial 54 (Step S12). # 13) On the other hand, when the operation of the brightness change dial 54 is not performed (NO in step # 12), an image faithful to the image photographed by the camera unit 7 without performing the process for the color blind person Is displayed on the LCD 18 (step # 14).

  Steps # 2 to # 14 are repeated until the main power is turned off by the power button (NO in step # 15). When the main power is turned off by the power button (YES in step # 15). A series of processing ends.

  In this way, a region of a specific color is displayed in accordance with the type of color blindness, such as displaying an image in which G (green) data is replaced with B (blue) data among regions satisfying Expression (1). By detecting and replacing the area with another color for display, or by detecting the edge area of the area and performing image processing to add a white line to the edge area, the color of the edge area Is approximated to a color recognized by a person with normal color vision, so that a person with color blindness can recognize the correct color as much as possible.

  In addition, since a brightness change dial 54 for changing the brightness is provided for a user who has an abnormal 3-color vision, the user can adjust the display brightness according to his / her own color vision abnormality. In addition, it is possible to make a user having an abnormal three-color vision abnormality recognize the correct color as much as possible.

  Note that this case is not limited to the image display device that provides images to both eyes as in the above-described embodiment, but includes an image display device that provides images to one eyeball.

It is a figure which shows the structure of the image display system which concerns on this invention. It is a front view which shows the structure of one Embodiment of an image display apparatus. FIG. 3 is a plan view with respect to FIG. 2. It is a right view with respect to FIG. It is sectional drawing which shows the internal structure of a camera unit. It is arrow sectional drawing seen from the arrow AA line of FIG. It is an external view of a control box. It is explanatory drawing of color vision abnormality. It is a block diagram which shows the electrical structure of an image display apparatus. It is a flowchart which shows a display process.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Image display apparatus 2 Transparent substrate 2a Tapered surface 3 Transparent substrate 7 Camera unit 8 Display housing | casing 12 Image pick-up element 15 Housing | casing part 16 LED
17 Collimator lens 18 LCD
DESCRIPTION OF SYMBOLS 19 Prism 19a Thick part 19b Tapered surface 26 Control part 27 Image processing part 28 Display control part 29 Input operation part 50 Control box 51 Input part 52 Color blindness type input part 53 Color weak color input part 54 Brightness change dial 100 Image display system

Claims (7)

An image display system configured to allow communication between an image display device attached to a head or a face and a control device that controls the operation of the image display device,
The controller is
Input means for inputting the type of color blindness;
Image processing means for performing predetermined image processing according to the type of color vision abnormality input by the input means on an image obtained by an imaging operation of an imaging means for receiving a light image of a subject and performing a photoelectric conversion operation; ,
Display control means for displaying the image after the image processing on the image display device,
The image display device includes:
An image display system comprising display means for receiving an image from the display control means and displaying the image after the image processing.   The image processing unit detects a region of a predetermined color from an image obtained by the imaging operation of the imaging operation by the imaging unit, and performs a process of replacing the color of the region with a color different from the predetermined color The image display system according to claim 1, wherein the image display system is one.   The image processing unit detects a region of a predetermined color from an image obtained by an imaging operation of the imaging operation by the imaging unit, and a line of a predetermined color different from the predetermined color is formed on an edge portion of the region. The image display system according to claim 1, wherein the process of superimposing and adding is performed. The control device includes display luminance adjusting means for performing input for adjusting display luminance when displaying on the display means,
The image processing means detects a predetermined color area in the image obtained by the imaging operation of the imaging operation by the imaging means when performing display for a predetermined color vision abnormality, and the display control means 4. The image display system according to claim 1, wherein the predetermined color area detected by the means is adjusted to the display brightness input by the display brightness adjusting means.   The image display system according to any one of claims 1 to 4, wherein the image display device is configured such that a user can see through the outside world.   6. The image display system according to claim 1, wherein the image after image processing is guided to one eyeball of a user.   The image display system according to claim 1, wherein the image-processed image is guided to both eyes of the user.

Images