TW201342903A - Camera apparatus and image-shooting method thereof - Google Patents

Abstract

A camera apparatus and an image-shooting method thereof are provided. The camera apparatus includes a camera unit, a projection unit and a digital signal processing module. The digital signal processing module outputs a projection control signal, so as to control the projection unit emitting an image light beam as a shooting auxiliary light when the camera unit taking pictures.

Description

Photography device and image capturing method thereof

The present invention relates to a photographing apparatus and an image photographing method thereof, and more particularly to a photographing apparatus having a projection function and an image photographing method thereof.

The projection device is a display device for generating a large-sized screen. The imaging principle of the projection device is to convert the illumination beam generated by the light source into an image beam by a light valve, and then project the image beam through the lens onto the screen or the wall to form an image. With the advancement of projection technology and the reduction of manufacturing costs, the use of projection devices has gradually expanded from commercial use to home use.

The lower-weight, smaller-sized portable projectors are mainly divided into pico projectors and pocket projectors. The pocket projectors are similar to traditional projectors, but they are lighter, thinner and shorter, and can be easily carried by users. The machine is lighter and thinner and can be integrated into mobile devices such as mobile phones and digital cameras. The micro-projection technology currently used by pico projectors is mainly divided into liquid crystal display (LCD) technology, digital light processing (DLP) technology, and liquid crystal on silicon (LCoS) technology. And four types of Micro Electro Mechanical Systems (MEMs) micro scanners (MicroScanner).

As all kinds of electronic products are moving toward high speed, high efficiency, light and short, and the micro projector has the advantages of being portable and has no use restrictions, it can be integrated into handheld electronic devices such as mobile phones and digital cameras. It has gradually become the mainstream of the personal digital market in the future.

The present invention provides a photographing apparatus and an image photographing method thereof, which can greatly improve the usability of the photographing apparatus.

The invention provides a photographing device comprising an image capturing unit, a projection unit and a digital signal processing module. The digital signal processing module is coupled to the camera unit and the projection unit, and outputs a projection control signal for controlling the projection unit to emit an image beam as the auxiliary light for shooting when the camera unit performs shooting.

In an embodiment of the present invention, the photographic device further includes a detecting unit coupled to the digital signal processing module for capturing a picture including the object to output an image signal, and the digital signal processing module The projection control signal is output according to the image signal and a setting signal corresponding to the user setting.

In an embodiment of the invention, the digital signal processing module includes an image processing unit and a light output control unit. The image processing unit performs image processing on the image signal to obtain an environmental information and status information of the object, and outputs a detection result signal accordingly. The light output control unit is coupled to the image processing unit, and outputs a projection control signal according to the detection result signal and the setting signal.

In an embodiment of the invention, the projection control signal includes an activation signal and a projection data signal, and the projection unit is activated by the activation signal, and emits an image beam according to the projection data signal.

In an embodiment of the invention, the projection data signal comprises a data waveform signal.

In an embodiment of the present invention, the camera device further includes a flash coupled to the digital signal processing module, and the light output control unit outputs a flash control signal according to the detection result signal and the setting signal to control the flash. Flashes.

In an embodiment of the invention, the digital signal processing module includes an image processing unit, a light output control unit, and an image output unit. The image processing unit performs image processing on the image signal to obtain an environmental information and status information of the object, and outputs a detection result signal accordingly. The light output control unit is coupled to the image processing unit, and outputs a projection data signal according to the detection result signal and the setting signal. The image output unit is coupled to the light output control unit, and outputs a projection control signal according to the projection data signal.

In an embodiment of the invention, the projection data signal includes a data waveform signal and a color sequence control signal.

The invention also provides an image capturing method for a photographing device, wherein the photographing device comprises a projection unit, and the image capturing method comprises the following steps. Capture a picture of a subject to get an image signal. A projection control signal is generated according to the image signal and a setting signal corresponding to the user setting, so as to control the projection unit to emit an image beam as a shooting auxiliary light.

In an embodiment of the present invention, the step of generating the projection control signal includes: performing image processing on the image signal to obtain an environmental information and state information of the object, and outputting a detection result signal according to the method. And outputting a projection control signal according to the detection result signal and the setting signal.

In an embodiment of the invention, the projection control signal includes an activation signal and a projection data signal, and the projection unit is activated by the activation signal, and emits an image beam according to the projection data signal.

In an embodiment of the invention, the projection data signal comprises a data waveform signal.

In an embodiment of the invention, the step of generating the projection control signal comprises the following steps. Image processing is performed on the image signal to obtain an environmental information and status information of the object, and a detection result signal is outputted accordingly. A projection data signal is output according to the detection result signal and the setting signal. The projection control signal is output according to the projection data signal.

In an embodiment of the invention, the projection data signal includes a data waveform signal and a color sequence control signal.

In an embodiment of the invention, the environmental information includes the intensity and color tone of the external ambient light, and the state information of the object includes the position of the subject, the facial expression, and the skin color.

Based on the above, the present invention combines a projection unit into a photographing device, and simulates various photographing auxiliary lights of a conventional camera by controlling the characteristics of the image light beam emitted by the projection unit, and gives the user a photograph when performing photographing in accordance with various photographing functions of the photographing device. Shooting tips to improve the ease of use of the camera.

The above described features and advantages of the present invention will be more apparent from the following description.

FIG. 1 is a schematic diagram of a photographing apparatus according to an embodiment of the present invention. Referring to FIG. 1 , the photographing apparatus 100 includes an image capturing unit 102 , a digital signal processing module 104 , and a projection unit 106 . The digital signal processing module 104 is coupled to the imaging unit 102 and the projection unit 106. The digital signal processing module 104 is configured to emit a projection control signal SC1 to the projection unit 106 when the imaging unit 102 performs imaging to control the projection unit 106 to emit an image beam as a shooting auxiliary light. Since the projection unit 106 is different from the LED lamp on the conventional camera, it can emit light of various light intensities or different colors, so the above-mentioned shooting auxiliary light can almost replace all the auxiliary auxiliary lights on the existing camera, such as a flash, a focus light, etc. Wait.

In addition, auxiliary lights that are not available in conventional cameras can also be achieved by using the projection unit 106, such as a spotlight. The color of the image beam emitted by the projection unit 106 is also changed according to the difference of the light of the shooting scene or the difference of the shooting object. For example, when shooting a portrait, the projection unit 106 can be used to emit an image light beam similar to apple light, so that the person who is photographed looks more skin and has a more lustrous color, thereby enhancing the photographing effect of the portrait. For example, under different ambient light conditions such as dusk and early morning, the projection unit 106 can be controlled to emit a suitable image beam to enhance the effect of photographing. In this way, not only can the cost of purchasing the auxiliary light source be saved, but also the auxiliary equipment must be carried when shooting, thereby effectively reducing the burden on the user.

Since the image light beam emitted by the projection unit 106 has the characteristic of being able to change different colors, when the user performs different shooting functions, the control projection unit 106 sequentially changes the image light beams of different colors to assist the user to take a picture, so that the shooting device is enabled. 100 is more convenient to use. For example, when the user performs the countdown automatic photographing function, the conventional camera prompts the start of the automatic photographing with the blinking frequency of a red light. In the present embodiment, the projection unit 106 can be used to convert the image beams of different colors to prompt the time for starting the automatic photographing. For example, when there are 5 seconds remaining, the projection unit 106 emits a yellow image beam, and when it is 3 seconds left, an orange image beam is emitted, and when 0.8 seconds remains, a red image beam is emitted.

In addition to performing a simple indicator function on a conventional camera, the projection unit 106 can also perform an indication function that cannot be achieved by a conventional camera. For example, the photographing device 100 can be set to perform face recognition, and the image light beams corresponding to different colors can be set according to various situations, for example, when the user does not smile, the projection unit 106 is controlled to emit a yellow image light beam (smile recognition), for example, when the user When the eye is closed, the projection unit 106 is controlled to emit a blue image beam (blinking), or the number of people who set the photo is taken. When someone does not enter the shooting range, the projection unit 106 is controlled to emit a red image beam until all the set photo conditions are met. The green light is displayed to take a picture. In this way, when the user performs the function of automatic photographing, the position and the expression of the image can be adjusted according to the indication of the image light beam emitted by the projection unit 106, thereby greatly improving the success rate of the automatic photographing and avoiding repeated remake.

Alternatively, the projection unit 106 can also be used for the purpose of preventing red-eye and auxiliary focus lamps. For example, the projection unit 106 can emit a high-intensity flash before the image is captured by 102 to avoid red-eye phenomenon of the photographer. In addition, the projection unit 106 can also illuminate the object by using the 106 before the image capturing unit 102 captures the image, so that the image capturing unit 102 can easily focus on the object, and then capture the image.

It should be noted that the application examples of the image beam characteristics of the projection unit 106 of the different shooting functions are only exemplary embodiments, and the actual application is not limited thereto. For example, it can also be applied to indicate a focus state or an exposure state, and the like. In addition, the projection unit 106 can display the characteristics of the image on the screen, and can also add other display information, such as the time and place of the photo, to the image content included in the image beam while emitting the image beam as the auxiliary light. , person's name, or other background images, etc. In this way, the imaging unit 102 can capture the subject together with the display information contained in the image beam.

2 is a schematic view of a photographing apparatus according to another embodiment of the present invention. The photographing apparatus 200 of the present embodiment is different from the photographing apparatus 100 in that the photographing apparatus 200 of the present embodiment further includes a detecting unit 206 coupled to the digital signal processing module 104 for detecting The camera unit 102 captures an image signal IM1 outputted from the screen and outputs a detection signal S1. The digital signal processing module 104 is based on the detection signal S1 and corresponding user settings (such as timed automatic photographing or user-set auxiliary light hue, intensity and lighting time to create various shooting situations (for example, using green light to create a strange situation) A setting signal SR1 of the atmosphere)) outputs a projection control signal SC1. Further, the digital signal processing module 104 can further include an image processing unit 202 and a light output control unit 204, wherein the image processing unit 202 is coupled to the image capturing unit 102, the detecting unit 206, and the light output. Control unit 204.

The image processing unit 202 performs image processing on the detection signal S1 to obtain an environmental information and status information of the object, and outputs a detection result signal SD1 accordingly. The environmental information may be, for example, the intensity and color tone of the external ambient light, and the state information of the object may be, for example, the position of the subject, the facial expression, and the skin color. The light output control unit 204 outputs the projection control signal SC1 to the projection unit 106 according to the detection result signal SD1 and the setting signal SR1. The projection control signal SC1 includes an activation signal SON1 and a projection data signal SP1. The projection unit 106 is activated by the activation signal SON1, and emits an image beam according to the projection data signal SP1. In this embodiment, the projection data signal SP1 can be, for example, a data waveform that defines the current intensity and the turn-on time of the LED imaging source used by the projection unit 106. The projection data signal SP1 can include, for example, a data waveform signal and a color sequence control signal. The data waveform signal is used to define the current intensity and the turn-on time of the LED display light source used by the projection unit 106, and the color-sequence control signal is Used to control switches such as Digital Micro-mirror Device (DMD) or Liquid Crystal On Silicon (LCOS) and turn-on duration.

It should be noted that the digital signal processing module 104 is not limited to outputting the projection control signal SC1 according to the detection signal S1 and the setting signal SR1. In some embodiments, the digital signal processing module 104 can also output the projection control signal SC1 according to the detection signal S1 or the setting signal SR1.

For example, FIG. 3 is a schematic diagram of a data waveform signal according to an embodiment of the invention. Referring to FIG. 3, the data waveform signal includes three data waveform signals of red, green, and blue (R, G, B) (in this embodiment, the blue image beam is not applied, so the blue data waveform signal does not appear. Pulse wave), the data waveform signal listed in this embodiment can be applied to the automatic photographing function of the countdown. As shown in FIG. 3, when the user presses the camera button, the light output control unit 204 knows the automatic camera function that will count down according to the setting signal SR1, and activates the startup signal SON1 of the projection unit 106 according to the internal setting output. The data waveform signal shown in Figure 3. The projection unit 106 is activated by the start signal SON1, and emits a green image beam every 0.5 seconds in the first 6 seconds according to the data waveform signal, and then orange for 3 seconds at intervals of 0.3 seconds. The image beam (the red and green data waveform signals appear at the same time), and finally the red image beam is emitted at a frequency of 0.1 second for 1 second.

FIG. 4 is a schematic diagram of a photographing apparatus according to another embodiment of the present invention. Referring to FIG. 4, the photographic device 400 of the present embodiment is different from the photographic device 200 in that the digital signal processing module 104 of the photographic device 400 of the present embodiment further includes an image output unit 402 coupled to the light output. Unit 204. In this embodiment, the image output unit 402 is responsible for controlling the projection unit 106 to emit an image beam. The light output control unit 402 outputs the activation signal SON1 and the projection data signal SP2 to the image output unit 402 according to the detection result signal SD1 and the setting signal SR1. The image output unit 402 outputs the projection control signal SC2 to the projection unit 106 according to the activation signal SON1 and the projection data signal SP2 to control the projection unit 106 to emit a projection beam.

For example, FIG. 5A is a schematic diagram of a data waveform signal according to another embodiment of the present invention. Referring to FIG. 5B, the data waveform signal of the embodiment can be applied to the shooting function of the automatic flash detection. When the user uses the photographing device 400 to take a picture, if the light output control unit 204 knows that the shooting scene is insufficient according to the detection result signal SD1, it determines that the flash is to be turned on, and then outputs the data waveform signal as shown in FIG. 5A according to the internal setting. The image output unit 402 outputs the projection control signal SC2 to the projection unit 106 according to the data waveform signal to control the projection unit 106 to emit a projection beam of the analog flash. As shown in FIG. 5A, the projection unit 106 applies a data waveform signal and a color sequence control signal different from the general projection image, and increases the light intensity of the red data waveform signal by 1.2 times, and the light intensity of the blue data waveform signal. Decrease to 0.6 times, while the light intensity of the green data waveform signal remains the same (the dotted line is the original waveform of the data waveform signal) to emit an image beam that simulates a 1/60 second flash. In addition, the color sequence control signal controls the state of the digital micromirror device or the switch of the twine panel to remain fully open.

It should be noted that the data waveform signal of the above analog flash effect is not limited to the data waveform signal exemplified in the embodiment of FIG. 5A, except that the pulse intensity of the adjusted data waveform signal is used to simulate the effect of the flash, and the data waveform signal can also be adjusted. The pulse width is used to achieve the same effect, that is, as long as the time and intensity integration results are the same, the same effect can be achieved. FIG. 5B is a schematic diagram of a data waveform signal according to another embodiment of the present invention. As shown in Figure B, the pulse width of the red data waveform signal can be increased by 1.2 times, and the pulse width of the blue data waveform signal can be reduced to 0.6 times, while the pulse width of the green data waveform signal remains unchanged (where the dotted line is The original waveform of the data waveform signal, so that it has the same simulation effect as the data waveform signal of Figure 5A.

6 is a schematic diagram of a data waveform signal according to another embodiment of the present invention. The data waveform signal of this embodiment can be applied to the red-eye prevention shooting function. When the user sets the red-eye reduction function to be turned on, the light output control unit 204 knows that the photographing function for red-eye reduction is to be performed according to the setting signal SR1. When the user half-presses the photo button, the light output control unit 204 outputs the data waveform signal shown in FIG. 6 according to the internal setting. The image output unit 402 controls the red image beam continuously emitted by the projection unit 106 according to the data waveform signal output projection control signal SC1, and then immediately emits a white image beam for 0.2 seconds (in this case, red, green and blue). The data waveform signal has a pulse wave at the same time. When the camera is finished, the image beam is stopped. In addition, the color sequence control signal controls the state of the digital micromirror device or the switch of the twine panel to remain fully open.

It should be noted that the projection unit 106 of the above embodiment can simulate the auxiliary illumination lamp of the conventional camera. However, in practical applications, the photographing device can also perform shooting with the conventional photographing auxiliary light. A schematic view of a photographing apparatus of an embodiment of the present invention as shown in Figs. 7 and 8. The difference between the photographic apparatus 700 shown in FIG. 7 and the photographic apparatus 200 of FIG. 2 is that the photographic apparatus 700 further includes a flash 702. Similarly, the photographing device 800 shown in the embodiment of FIG. 8 and the photographing device 400 of FIG. 4 are different in that the photographing device 800 further includes a flash lamp 802. The flash 702 and 802 are both coupled to the light output control unit 204 in the digital signal processing module 104. The light output control unit 204 can output a flash control signal SF1 according to the detection result signal SD1 and the set signal SR1 to control the flashes 702 and 802 to emit a flash.

FIG. 9 is a diagram showing an image capturing method of a photographing apparatus according to an embodiment of the present invention. Referring to FIG. 9, the image capturing method of the above-mentioned photographing apparatus may be summarized as follows. First, a picture of a subject is captured to obtain an image signal (step S902). Then, a projection control signal is generated according to the image signal and a setting signal corresponding to the user setting, and the projection unit is controlled to emit an image light beam as the shooting auxiliary light (step S904). For example, the projection unit can emit an image beam of an analog flash, a spotlight, or other various indicator lights.

Further, the image capturing method of the photographing device can also be as shown in FIG. FIG. 10 is a diagram showing an image capturing method of a photographing apparatus according to another embodiment of the present invention. Referring to FIG. 10, the image capturing method of the photographing apparatus of the present embodiment is different from the image capturing method of the photographing apparatus of the embodiment of FIG. 9 in that the image signal is obtained after capturing the image of the subject (step S902). Step S904 may include the following steps in this embodiment. First, image processing is performed on the image signal to obtain an environmental information and status information of the object, and a detection result signal is output according to the step (step S1002). The environmental information may include, for example, the intensity and hue of the external ambient light, or the shooting settings generated by the detection environment (eg, scene mode, iso value, exposure value, aperture value, shutter speed, focal length, magnification factor, etc.), The status information of the subject may include, for example, the position of the subject, facial expressions, and skin color. Then, a projection control signal is output according to the detection result signal and the setting signal to control the projection unit to emit an image beam as the shooting auxiliary light (step S1004). The projection control signal includes an activation signal and a projection data signal, and the projection unit is activated by the activation signal, and the image light beam is emitted as the auxiliary light according to the projection data signal.

In addition, in some embodiments, if the photographing device has an element (for example, the image output unit 402 of the embodiment of FIG. 4) responsible for controlling the projection unit to emit an image beam. The image capturing method of the photographing device can also be as shown in FIG. FIG. 11 is a diagram showing an image capturing method of a photographing apparatus according to another embodiment of the present invention. Referring to FIG. 11, the image capturing method of the photographing apparatus of the present embodiment is different from the image capturing method of the photographing apparatus of the embodiment of FIG. 9 in that the image signal is obtained after capturing the image of the subject (step S902). Step S904 of the embodiment of FIG. 9 may include the following steps in this embodiment. First, image processing is performed on the image signal to obtain an environmental information and status information of the object, and a detection result signal is output according to the step (step S1102). Then, an activation signal and a projection data signal are output according to the detection result signal and the setting signal (step S1104). The projection data signal includes a data waveform signal and a color sequence control signal. Finally, the projection control signal is output according to the activation signal and the projection data signal to control the projection unit to emit an image light beam as the shooting auxiliary light (step S1106).

In summary, the present invention combines a projection unit into a photographing device, and simulates various photographing auxiliary lights of a conventional camera by controlling characteristics of an image beam emitted by the projection unit, and cooperates with various photographing functions of the photographing device to give a photograph when performing photographing. The user takes a picture. In addition to greatly improving the ease of use of the photographic device, the user can save the cost of purchasing the auxiliary light source, reduce the need to carry the auxiliary device during shooting, and effectively reduce the burden on the user.

Although the present invention has been disclosed in the above embodiments, it is not intended to limit the invention, and any one of ordinary skill in the art can make some modifications and refinements without departing from the spirit and scope of the invention. The scope of the invention is defined by the scope of the appended claims.

100, 200, 400, 700, 800. . . Photography device

102. . . Camera unit

104. . . Digital signal processing module

106. . . Projection unit

202. . . Image processing unit

204. . . Light output control unit

206. . . Detection unit

402. . . Image output unit

702, 802. . . flash

SC1, SC2. . . Projection control signal

S1. . . Detection signal

SR1. . . Setting signal

SD1. . . Detection result signal

SON1. . . Start signal

SP1. . . Projection data signal

SF1. . . Flash control signal

IM1. . . Image signal

S902~S904, S1002~S1004, S1102~S1106. . . Photographing method steps of the photographing device

FIG. 1 is a schematic diagram of a photographing apparatus according to an embodiment of the present invention.

2 is a schematic view of a photographing apparatus according to another embodiment of the present invention.

FIG. 3 is a schematic diagram of a data waveform signal according to an embodiment of the invention.

FIG. 4 is a schematic diagram of a photographing apparatus according to another embodiment of the present invention.

5A, 5B, and 6 are schematic diagrams showing data waveform signals according to an embodiment of the present invention.

7 and 8 are schematic views of a photographing apparatus according to an embodiment of the present invention.

9 to 11 illustrate a method of capturing an image of a photographing apparatus according to an embodiment of the present invention.

100. . . Photography device

102. . . Camera unit

104. . . Digital signal processing module

106. . . Projection unit

SC1. . . Projection control signal

Claims (19)

A photographic device includes: a camera unit; a projection unit; and a digital signal processing module coupled to the camera unit and the projection unit to output a projection control signal for controlling the projection when the camera unit performs shooting The unit emits an image beam as a shot auxiliary light. The photographic device of claim 1, further comprising: a detecting unit coupled to the digital signal processing module, detecting an image signal output by the camera unit and detecting the image signal according to the image signal The detection signal is outputted, and the digital signal processing module outputs the projection control signal according to the detection signal and one of the setting signals corresponding to the user or a combination thereof. The photographic device of claim 2, wherein the digital signal processing module comprises: an image processing unit that performs image processing on the image signal to obtain an environmental information and status information of the object, and And outputting a detection result signal; and a light output control unit coupled to the image processing unit, and outputting the projection control signal according to the detection result signal and the setting signal. The photographic device of claim 3, wherein the projection control signal comprises an activation signal and a projection data signal, the projection unit is activated by the activation signal, and the image is emitted according to the projection data signal. beam. The photographic device of claim 4, wherein the projection data signal comprises a data waveform signal and a color sequence control signal. The photographic device of claim 4, wherein the projection data signal comprises one or a combination of a date, a time, and a camera setting parameter. The photographic apparatus of claim 3, wherein the environmental information includes one or a combination of intensity and hue of external ambient light, and the status information of the subject includes a position of the subject, a facial expression, and a skin color. One or a combination thereof. The photographic device of claim 3, further comprising: a flash coupled to the digital signal processing module, the light output control unit further outputting a flash control signal according to the detection result signal and the setting signal. To control the flash to fire. The photographic device of claim 2, wherein the digital signal processing module comprises: an image processing unit that performs image processing on the image signal to obtain an environmental information and status information of the object, and And outputting a detection result signal; a light output control unit coupled to the image processing unit, outputting an activation signal and a projection data signal according to the detection result signal and the setting signal; and an image output unit coupled The light output control unit outputs the projection control signal according to the activation signal and the projection data signal. The photographic device of claim 9, wherein the environmental information includes one or a combination of intensity and hue of external ambient light, and the state information of the subject includes a position of the subject, a facial expression, and a skin color. One or a combination thereof. The photographic device of claim 9, further comprising: a flash coupled to the digital signal processing module, the light output control unit further outputting a flash control signal to control the flash to emit a flash. An image capturing method of a photographing apparatus, wherein the photographing apparatus includes a projection unit, the image capturing method includes: capturing a picture of a subject to obtain an image signal; and determining a setting according to the image signal and a corresponding user setting One or a combination of signals generates a projection control signal to control the projection unit to emit an image beam as a shooting auxiliary light. The image capturing method of the photographic device of claim 12, wherein the step of generating the projection control signal comprises: performing image processing on the image signal to obtain an environmental information and status information of the object, and And outputting a detection result signal; and outputting the projection control signal according to the detection result signal and the setting signal. The image capturing method of the photographic device of claim 13, wherein the projection control signal comprises an activation signal and a projection data signal, and the projection unit is activated by the activation signal, and according to the projection data The signal emits the image beam. The image capturing method of the photographic device of claim 14, wherein the projection data signal comprises a data waveform signal and a color sequence control signal. The image capturing method of the photographic device of claim 14, wherein the projection data signal comprises one or a combination of a date, a time, and a camera setting parameter. The image capturing method of the photographic device according to claim 12, wherein the environmental information includes one or a combination of the intensity and the color of the external ambient light, and the state information of the object includes the position of the subject, One or a combination of facial expressions and skin tones. The image capturing method of the photographic device of claim 12, wherein the step of generating the projection control signal comprises: performing image processing on the image signal to obtain an environmental information and status information of the object, and And outputting a detection result signal; and outputting a start signal and a projection data signal according to the detection result signal and the setting signal, the projection unit is controlled by the activation signal, and is issued according to the projection data signal An image beam; and outputting the projection control signal according to the activation signal and the projection data signal. The image capturing method of the photographic device according to claim 18, wherein the environmental information includes one or a combination of the intensity and the color of the external ambient light, and the state information of the subject includes the position of the subject, One or a combination of facial expressions and skin tones.