JP2003333608A - Field sequential television camera device for photographing skin - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a field sequential single CCD color television camera device for photographing skin which has as high resolution and color reproducibility as a 3-CCD television camera device while maintaining a compact structure. <P>SOLUTION: A lens 4 for close shot and a light emitting diode illumination block 6 are arranged in a close case, and an image of a subject brought into contact with a photographic window opened in the front end of the case is formed on a black-and-white imaging device 5. Blue, green, and red light emitting diodes are mounted on the light emitting diode illumination block 6 and are made to sequentially emit light for each frame to illuminate the subject. Obtained blue, green, and red image signals are sequentially written in a memory, and they are simultaneously read out to match phases to generate blue, green, and red primary color image signals. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a television camera device for photographing skin which is used for skin care and makeup counseling.

[0002]

2. Description of the Related Art Currently, a wide range of cosmetics are sold in various sales channels and are flooding the market, but it is very difficult for the general public to determine what kind of cosmetics are suitable for them. It's difficult. Also, there are few opportunities to receive advice.

As one method to meet such needs, a skin photographing TV camera is used to photograph the skin of the face, the skin condition is diagnosed, and a skin care method and cosmetics suitable for the person. Counseling for selection is quite common at cosmetic stores and beauty salons.

Most television cameras used for this purpose have a close-up lens, an image sensor, and lighting built into one case, and a counselor monitors a color image by touching the case's shooting window against the skin. While looking at the screen, the skin condition is judged and counseling is performed.

However, most conventional TV cameras for skin photography use a single-plate color image pickup device, and the resolution and color reproducibility are not sufficient. On the other hand, 3
Although the plate type color camera is excellent in resolution and color reproducibility, it is heavy and large in shape and expensive, and is not suitable for a TV camera for skin photography. It is also known that images such as ultraviolet rays and infrared rays are useful for grasping the skin condition and utilizing it for counseling, but it is not possible to take ultraviolet rays and infrared rays images with a normal color camera. Absent. Therefore, most of them are insufficient for accurate analysis of data to diagnose, judge, and counsel skin conditions.

[0006]

Most of the conventional TV cameras for skin photographing use a single-plate color image pickup device, and therefore, neither resolution nor color reproducibility is sufficient.

In addition, the conventional TV camera for skin photography cannot simultaneously capture an image with light other than visible light such as ultraviolet rays or infrared rays.

Therefore, in the present invention, the conventional single-plate color image pickup device is realized by using the blue, green, and red light-emitting diode illumination and the memory to perform the separation operation of the three primary colors on the illumination side and adopting the field sequential image pickup system. With the same size and weight as the TV camera for skin photography used, the resolution and color reproducibility of a three-plate color camera were achieved. In addition, an ultraviolet light emitting diode or an infrared light emitting diode was added, and at the same time color images were exposed to ultraviolet light. The technical task is to obtain an image or an infrared image.

[0009]

[Means for Solving the Problems] Generally, a TV camera for skin photographing is housed in a closed case and has a structure in which external light does not enter at the time of photographing. We make it emit light one frame at a time,
The three primary color video signals of blue, green, and red obtained thereby are sequentially stored in the memory, and the blue, green, and red video signals are read out from the memory in the same phase to form a color video signal. In the same way, ultraviolet light emitting diode illumination or infrared light emitting diode illumination is added to obtain an ultraviolet ray image or an infrared ray image at the same time as a color image.

The frame sequential TV camera device for skin image capturing according to claim 1 is configured to sequentially display blue in each frame period.
It is said that one color video signal is formed at a 3-frame cycle by sequentially emitting light from a light emitting diode having a green and red emission spectrum, writing the obtained video signals into a memory, and reading the same in the same phase from the memory. It features a structure that repeats cycles.

According to a second aspect of the present invention, there is provided a frame sequential television camera device for skin photography, which performs a one-shot operation in which the cycle is performed once in response to a trigger signal sent from a shutter switch for still image photography.

According to a third aspect of the present invention, there is provided a frame sequential television camera device for skin photography, in which a light emitting diode having a blue, green and red emission spectrum is replaced with a white light emitting diode and blue, green and red band pass filters. It is characterized in that three primary color illuminations are performed by a combination of the above and a frame sequential color camera is formed.

According to a fourth aspect of the present invention, there is provided a frame sequential television camera device for skin imaging, in which a light shielding plate is arranged on a side surface of the white light emitting diode, and a predetermined portion of each band pass filter of which illumination light is blue, green and red. It is characterized in that it has a structure for preventing the mixing of the illumination light from being radiated only to the other side and leaking to other filters.

According to a fifth aspect of the present invention, there is provided a frame-sequential television camera device for skin image pickup, in which an ultraviolet light emitting diode and an ultraviolet image memory are added.

According to a sixth aspect of the present invention, there is provided a frame-sequential television camera device for skin image capturing, wherein an infrared light emitting diode and an infrared image memory are added.

[0016]

Embodiments of the present invention will be described in detail below with reference to the drawings.

FIG. 1 is a perspective view showing an example of an embodiment of a TV camera device for skin photography of the present invention.

The skin photographing television camera device 1 according to the present example has a photographing window 2, and holds the main body in the hand so that the photographing window 2 is brought into close contact with the skin of the face for photographing. A shutter switch 3 for still image shooting is attached at a position where it can be easily operated with a finger.

FIG. 2 is an explanatory diagram related to the structure of the optical system portion. The image of the subject 7 is formed on the image sensor 5 via the lens 4 and converted into a video signal. As the image sensor, a monochrome image sensor without an on-chip color filter is used. The illumination of the subject is performed by the light emitting diode illumination block 6
Are arranged around the optical axis and are illuminated from inside the case.

FIG. 3 shows a light emitting diode illumination block 6
It is explanatory drawing which shows the structure of. Several sets of blue light emitting diode 8, green light emitting diode 9, and red light emitting diode 10 are arranged on the substrate 11 on the circumference. (A) is a front view seen from the direction of the shooting window,
(B) is a side view. (Corresponding to claims 1 and 2)

FIG. 4 is also an explanatory view showing the structure of the light emitting diode illumination block 6, similarly to the white light emitting diode 1.
It is a figure in the case where three primary color illumination is comprised by the combination of 2, 13, 14 and the blue band pass filter 15, the green band pass filter 16, and the red band pass filter 17. These filters are attached to a support plate 18 having an opening. (Corresponding to claim 3)

FIG. 5 is an explanatory view showing the structure of the light emitting diode illumination block 6 as well, in the case where the light shielding plate 19 is provided on the side surface of the light emitting diode. (Corresponding to claim 4)

FIG. 6 is an explanatory view showing the structure of the light emitting diode illumination block 6 in the same manner.
It is a figure when a is arranged. (Corresponding to claim 5)

FIG. 7 is also an explanatory view showing the structure of the light emitting diode illumination block 6, similarly to the infrared light emitting diode 21.
It is a figure when a is arranged. (Corresponding to claim 6)

FIG. 8 is a block diagram showing an internal circuit of the frame sequential television camera device for skin imaging. The image of the subject is formed on the image sensor 35 through the lens 34 and converted into an image signal. The image sensor output is the video signal processing circuit 3
6, is formed into a television signal, and is recorded in the image memory 37. The signal read from the memory is formed into a television monitor signal by the image display circuit 38 and output. The trigger signal given by the shutter switch 41 for still image shooting is input to the microprocessor circuit 40, and the CCD drive circuit 3 is supplied from the microprocessor circuit.
9. The control signal is sent to the light emitting diode drive circuit 33, the image memory 37, and the image display circuit 38. Power is supplied by the battery 43 and circuit power is produced by the power circuit 42. Although the battery is used as an example of the power source, a cable may be used to supply power from an external power source or a personal computer.

The above is an example configuration of the present invention, and its operation will be described below. When the user holds the television camera unit 1 shown in FIG. 1 to determine the face part to be photographed and then operates the shutter switch 3 for still image photographing,
The light emitting diode illumination block 6 shown in FIG. 2 operates to sequentially turn on blue illumination, green illumination, and red illumination to illuminate the subject, and an image of the subject is formed on the image sensor 5 through the lens 4. The image sensor sequentially outputs a blue image signal, a green image signal, and a red image signal corresponding to blue illumination, green illumination, and red illumination. These video signals are written in the image memory 37 shown in FIG. 8, and then the blue, green, and red video signals are simultaneously read out to become the three primary color video signals, which are sent to the image display circuit 38. It is formed into a television signal and output. This is the basic operation of the present invention.

The characteristic actions of the first and second aspects of the invention will be described. FIG. 3 shows the structure of the light emitting diode illumination block 6, in which the blue light emitting diode 8, the green light emitting diode 9 and the red light emitting diode 10 are set as one set, and several sets are arranged on the substrate 11. As shown in the timing chart of FIG. 9, when the shutter switch 3 for still image shooting is actuated, a trigger pulse 44 is generated and sent to the microprocessor circuit 40 of FIG. 8, and various control signals are sent from the microprocessor circuit 40. Is output. Upon receiving the one control signal, the blue light emitting diode 8 is turned on as shown by the waveform 45 in FIG. Then, an image of the subject illuminated by blue light is formed on the image sensor, photoelectric conversion is performed, and charges are stored as indicated by 48 in the timing chart. The accumulated charges are read out from the image sensor to become the blue video signal 51 and written in the image memory 37 of FIG. Following the blue light emitting diode, the green light emitting diode 9 is turned on and the same operation is performed, and the green video signal output 52 is written in the memory 37. Then, the red light emitting diode 10 is turned on, the same operation is performed, and the red video signal output 53 is written in the memory 37. From the memory 37,
The blue, green, and red video signals are read out at the same time to become three primary color video signals, which are sent to the image display circuit 38 to be formed into a television signal and output. Each of the blue, green, and red light-emitting diodes has a narrow bandwidth, such as a blue illumination spectrum 22, a green illumination spectrum 23, and a red illumination spectrum 24, as shown in FIG. 10A.
The color rendering property is not always good in general subject photographing, but in the case of skin photographing which is the purpose of use of the present invention, the spectral reflectance characteristic of the subject is gentle as shown by the characteristic curve 30 in FIG. Since the difference is not so large, it can be practically used for color photography.

The characteristic action of the invention of claim 3 will be described. FIG. 4 shows a structure of the light emitting diode illumination block 6, in which a white light emitting diode 12 and a blue band pass filter 15 are combined to form blue illumination, and similarly, a white light emitting diode 13 and a green band pass filter 16 are used for green illumination and white light. The light emitting diode 14 and the red bandpass filter 17 constitute red illumination. These 3
Several sets of color illuminations are arranged on the substrate 11. The operation leading to the generation of the video signal is similar to the above-mentioned process. An example of the wavelength spectrum of the illumination light of this system is shown in FIG. The blue illumination spectrum 25, the green illumination spectrum 26, and the red illumination spectrum 27 shown in the figure can have the same bandwidth as a normal color camera.

The characteristic operation of the invention of claim 4 will be described. FIG. 5 shows the structure of the light emitting diode illumination block 6, which is the same as that described above in that the illumination of each color is constituted by the white light emitting diode and the band pass filter. A light blocking plate 19 is provided between the white light emitting diodes so that the light does not leak to the adjacent filter and the light is not mixed.

The characteristic operation of the invention of claim 5 will be described. FIG. 6 shows a structure in which an ultraviolet light emitting diode 20 is added in addition to the above-described structure and action, and blue light, green light, red light is followed by illumination with ultraviolet light, and an ultraviolet image signal is obtained. . Figure 1 shows an example of the wavelength spectrum of ultraviolet illumination.
It is shown in the ultraviolet illumination spectrum 28 of 0 (C).

The characteristic operation of the invention of claim 6 will be described. FIG. 7 shows a system in which an infrared light emitting diode 21 is used instead of the ultraviolet light emitting diode described above. An example of the wavelength spectrum of infrared illumination is shown in the infrared illumination spectrum 29 of FIG.

[0032]

As described above, the present invention sequentially turns on the light emitting diodes that generate blue light, green light, and red light,
By synchronizing the obtained video signals using a memory, it is possible to realize a TV camera for skin photography that has a resolution and color reproducibility as good as that of a three-panel color camera while maintaining a compact shape. Further, since an ultraviolet ray image or an infrared ray image can be obtained at the same time as a color image, the accuracy of skin diagnosis can be increased, and the television camera for photographing skin can exhibit an extremely excellent function.

[Brief description of drawings]

FIG. 1 is a perspective view showing an example of an embodiment of a skin-capturing frame-sequential television camera device of the present invention.

FIG. 2 is an explanatory diagram showing a structure of an optical system portion.

FIG. 3 is an explanatory diagram showing an example of a structure of a light emitting diode illumination block using blue, green, and red light emitting diodes.

FIG. 4 is an explanatory diagram showing an embodiment of a structure of a light emitting diode illumination block in which a white light emitting diode and blue, green, and red bandpass filters are combined.

FIG. 5 is an explanatory diagram showing an example of a structure of a light emitting diode illumination block in which a light shielding plate is provided between white light emitting diodes.

FIG. 6 is an explanatory diagram showing an example of the structure of a light emitting diode illumination block including an ultraviolet light emitting diode.

FIG. 7 is an explanatory diagram showing an example of a structure of a light emitting diode illumination block including an infrared light emitting diode.

FIG. 8 is a block diagram of an internal circuit of the present invention.

FIG. 9 is a timing chart for explaining the operation of the present invention.

FIG. 10 is an explanatory view showing an example of a wavelength spectrum of the light emitting diode illumination which constitutes the present invention.

FIG. 11 is an explanatory diagram showing an average spectral reflectance of skin.

[Explanation of symbols]

1 TV camera device body for skin photography 2 Shooting window 3 Shutter switch for still image shooting 4 lenses 5 Image sensor (for black and white) 6 Light emitting diode lighting block 7 Subject (skin) 8 Blue light emitting diode 9 Green light emitting diode 10 Red light emitting diode 11 board 12 White light emitting diode 13 White light emitting diode 14 White light emitting diode 15 Blue bandpass filter 16 Green bandpass filter 17 Red bandpass filter 18 Filter support plate 19 Light shield 20 UV light emitting diode 21 Infrared light emitting diode

   ─────────────────────────────────────────────────── ─── Continued front page    F term (reference) 5B047 AA30 AB04 BA03 BB04 BC05                       BC07 BC12 BC14 BC20 CA19                       CB16                 5C022 AB15 AC31 AC42 AC52 AC54                       AC55 AC69                 5C065 AA06 BB41 CC01 DD01 DD17                       EE06 EE12 EE18 FF05

Claims (6)

[Claims] 1. A lens disposed inside the case so as to face a photographing window opened in front of the case main body, an image pickup device for photographing an optical image incident through the lens, and the lens provided inside the case. In addition, blue, green, and red light-emitting diode illuminations that illuminate the photographing window side, an illumination drive circuit that independently pulse-lights the light-emitting diode illuminations, and three primary color image signals of blue, green, and red are recorded respectively. The memory and the blue, green, and red light-emitting diode illuminations are sequentially turned on, and the blue obtained from the image sensor,
And a control circuit for generating control signals for sequentially storing the three primary color video signals of green and red in the memory and then simultaneously reading the three primary color video signals of blue, green and red from the memory. A frame sequential TV camera device for skin photography. 2. The frame-sequential TV camera device for skin image pickup is provided with a shutter switch for still image shooting, and the shooting operation is performed one shot by a trigger signal from the shutter switch for still image shooting. The frame sequential television camera device according to claim 1. 3. In the frame sequential television camera device for skin photography, a white light emitting diode and a band pass filter for transmitting light of each of blue, green and red are combined instead of the light emitting diode illumination of blue, green and red. The frame sequential television camera device for skin photographing according to claim 1 or 2, wherein illumination is used. 4. The frame sequential TV camera device for skin imaging according to claim 3, wherein in the frame sequential TV camera device for skin imaging, a light shielding plate is provided on a side surface of the white light emitting diode. 5. The frame-sequential TV camera device for skin photographing includes ultraviolet light emitting diode lighting in addition to blue, green, and red light emitting diode lighting, an illumination driving circuit for the same, and a memory for recording an ultraviolet video signal. The frame sequential television camera device for skin imaging according to claim 1, 2, 3, or 4. 6. In the frame-sequential television camera device for skin photography, in addition to blue, green, and red light emitting diode illuminations, an infrared light emitting diode illumination, an illumination drive circuit thereof, and a memory for recording an infrared image signal. The frame sequential television camera device for skin imaging according to claim 1, 2, 3, or 4.