JPH11317898A - Digital camera - Google Patents

Abstract

PROBLEM TO BE SOLVED: To built up a presentation system with excellent operating convenience without the need for interposing a computer in the case that the presentation is conducted by projecting an image by a digital camera by a projector. SOLUTION: A digital camera connectable to a projector 400 is provided with a display means 10 that displays a photographed image, an entry means 315 that is provided on the display means to enter optional hand-writing data, a display control means that synthesizes the hand-written data entered by the entry means 315 with an image and displays the synthesized image on a display means, and a transmission means that sends contents displayed on the display means to the projector 400.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a digital camera connectable to a projection device such as a liquid crystal projector.

[0002]

2. Description of the Related Art Generally, a digital camera is provided with a display unit for displaying a photographed image at the time of photographing or reproducing. Further, the photographed image is recorded in a recording medium such as a memory card built in or detachable from the digital camera.

On the other hand, for example, in presentations of research results, introduction of exhibits, or discussions at various conferences, an OHP or a liquid crystal projector is used as a presentation system used by a presenter to give an explanation based on a projected image. Is widely used. And recently,
2. Description of the Related Art There has been frequently used a method in which content for presentation (description content) is stored in a computer, for example, a personal computer (hereinafter, referred to as a personal computer) in advance, and a screen of the personal computer is projected on a screen by a projection device.

Therefore, in such a presentation system, there is a case where an image photographed by the digital camera is desired to be used as contents for presentation.

[0005]

However, in the conventional presentation system, when an image from a digital camera is used for presentation, the image is temporarily transferred to a personal computer directly or via a recording medium such as a memory card. After that, it is necessary to perform projection using a projection device, which is not convenient.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and eliminates the need for a computer when performing presentation by projecting an image from a digital camera using a projection device. The objective is to provide a digital camera that can be constructed.

[0007]

An object of the present invention is to provide a digital camera which can be connected to a projection apparatus, wherein a display means for displaying a photographed image, and an arbitrary handwritten data provided on the display means. Input means; display control means for combining the handwritten data input by the input means with an image and displaying the image on a display means; and transmitting means for transmitting the content displayed on the display means to the projection device. It is solved by a digital camera characterized by the above.

According to this digital camera, the photographed image is transmitted directly to the projection device, so that it is not necessary to intervene a computer.

Further, since the photographed image and the handwritten data are synthesized and transmitted to the projection apparatus, the handwritten drawing and the explanatory note are added to the digital camera side, so that the handwritten explanatory note and the like are added to the content image. The projected image is projected on a screen or the like by the projection device.

Further, since the input means capable of inputting the handwritten data is provided on the display means for displaying the photographed image, it is easy to confirm the position of the handwritten data with respect to the photographed image and to combine the handwritten data with the image. Since the contents are displayed on the display means, it is easy to confirm the projected contents.

[0011]

FIG. 1, FIG. 2 and FIG. 3 show a digital camera according to an embodiment of the present invention.

The digital camera 1 comprises a box-shaped camera body 2 and a rectangular parallelepiped imaging section 3. The imaging unit 3 is detachably attached to the right side of the camera body 2 when viewed from the front (the front side in FIG. 1), and is rotatably mounted in a plane parallel to the right side.

The image pickup section 3 includes a photographing lens comprising a macro zoom and a CCD (Charge Coupled D).
device), which converts an optical image of a subject into an image composed of charge signals photoelectrically converted by each pixel of the CCD and captures the image. On the other hand, the camera body 2 is provided with an LCD (Liquid)
d Display (D Crystal Display), a mounting portion 17 for the memory card 8, and a connection terminal 13 to which a Toei device (projector) is externally connected. After the processing, processing such as display on the LCD display unit 10, recording on the memory card 8, transfer to the projector, and the like are performed.

A macro zoom lens 301 is provided inside the image pickup section 3, and an image pickup circuit having a CCD color area sensor 303 is provided at an appropriate position behind the macro zoom lens 301. In addition, a dimming circuit 304 including a dimming sensor 305 that receives the reflected light of the flash light from the subject is provided at an appropriate position in the imaging unit 3.

As shown in FIG. 1, on the front surface of the camera body 2, a grip 4 is provided at an appropriate position at the left end, and a built-in flash 5 is provided at an appropriate upper portion at the right end. As shown in FIG. 2, on the upper surface of the camera body 2, switches 6 and 7 for frame advance when reproducing a recorded image are provided substantially at the center. The switch 6 is a switch (hereinafter, referred to as an Up key) for advancing the recorded image in the direction in which the frame number increases (the direction of the photographing order). (Hereinafter referred to as Down key). Further, an erasure switch D for erasing an image recorded on the memory card 8 is provided on the left side of the Down key 7 when viewed from the rear side (the front side in FIG. 1).
A shutter button 9 is provided to the right of the p key 6.

As shown in FIG. 2, an LCD for displaying a captured image on a monitor (corresponding to a view finder) and reproducing and displaying a recorded image is provided on the rear surface of the camera body 2, as shown in FIG. A display unit 10 is provided. Also, as shown in FIG. 4, on the LCD display unit 10,
A touch panel 315 is provided. By touching the touch panel 315 with the pen 100, handwriting input of arbitrary characters, figures, and the like is enabled. Also,
A compression rate setting switch 12 composed of a slide switch for switching and setting a compression rate K of image data recorded on the memory card 8 is provided below the display unit 10. Also, on the side surface of the camera body 2 on the side of the imaging unit 3,
A connection terminal 13 to which the projection apparatus is externally connected is provided, and a power switch PS is provided on the upper rear surface.

A pen housing 16 is provided on a side surface of the camera body 2. The pen housing 16 is used to input arbitrary handwritten data on the touch panel provided on the display unit 10. The pen 100 is stored.

The digital camera 1 has a flash mode (hereinafter, flash is sometimes referred to as FL) flash mode, an "automatic flash mode" in which the built-in flash 5 is automatically flashed in accordance with the subject brightness. A "forcible light emission mode" for forcibly emitting light from the built-in flash 5 and a "light emission prohibition mode" for inhibiting light emission from the built-in flash 5 are provided irrespective of the above. FL mode setting key 11
Each time is pressed, each mode of "automatic light emission", "forced light emission" and "light emission inhibition" is cyclically switched, and any one of the modes is selectively set. In the digital camera 1, two compression ratios K of 1/8 and 1/20 can be selected and set. For example, when the compression ratio setting switch 12 is slid to the right, the compression ratio K = 1/8 is set. Slide to the left, the compression ratio K = 1/20 is set. In the present embodiment, two types of compression ratios K can be selected and set, but three or more types of compression ratios K
May be selectively set.

Further, a photographing / playback mode setting switch 14 for switching between a "photographing mode" and a "playback mode" is provided at the upper right end of the rear surface of the camera body 2.
The photographing mode is a mode for photographing, and the reproducing mode is a mode for displaying a photographed image recorded on the memory card 8 on the display unit 1.
This is a mode for reproducing and displaying 0. The shooting / playback mode setting switch 14 also includes a two-contact slide switch. For example, sliding to the right sets the playback mode, and sliding to the left sets the shooting mode.

A battery loading chamber 1 is provided on the bottom of the camera body 2.
8 and a card loading chamber 17 for loading the memory card 8 are provided. The loading openings of both loading chambers 17 and 18 are closed by a clamshell type lid 15. The digital camera 1 according to the present embodiment uses a power supply battery E, which is formed by connecting four AA batteries in series, as a drive source.

FIG. 5 is a block diagram showing a control system of the digital camera 1.

In the image pickup section 3, the CCD 303
Converts the light image of the subject formed by the macro zoom lens 301 into image signals of R (red), G (green), and B (blue) color components (from a signal train of pixel signals received by each pixel). ) And output. The timing generator 314 generates various timing pulses for controlling driving of the CCD 303.

The exposure control in the image pickup unit 3 is performed by adjusting the exposure amount of the CCD 303, that is, the charge accumulation time of the CCD 303 corresponding to the shutter speed, since the stop is a fixed stop. If an appropriate shutter speed cannot be set when the subject brightness is low, the CCD 3
By performing the level adjustment of the image signal output from the device 03, the improper exposure due to the insufficient exposure is corrected. That is, when the luminance is low, the exposure control is performed by combining the shutter speed and the gain adjustment. The level adjustment of the image signal is performed in the gain adjustment of the AGC circuit in the signal processing circuit 313.

The timing generator 314 generates a drive control signal for the CCD 303 based on a reference clock transmitted from the timing control circuit 202.
The timing generator 314 generates clock signals such as integration start / end (exposure start / end) timing signals and light-receiving signal readout control signals (horizontal synchronization signal, vertical synchronization signal, transfer signal, etc.) for each pixel. Output to the CCD 303.

The signal processing circuit 313 performs predetermined analog signal processing on an image signal (analog signal) output from the CCD 303. The signal processing circuit 313
It has a DS (correlated double sampling) circuit and an AGC (auto gain control) circuit. The CDS circuit reduces the noise of the image signal, and the level of the image signal is adjusted by adjusting the gain of the AGC circuit.

The light control circuit 304 controls the light emission amount of the built-in flash 5 in flash photography to a predetermined light emission amount set by the overall control unit 211. In flash photography, the reflected light of flash light from the subject is received by the light control sensor 305 at the same time as the start of exposure, and when the amount of received light reaches a predetermined light emission amount, the light control circuit 3
An emission stop signal is output from 04 to the flash control circuit 214 via the overall control unit 211. The flash control circuit 214 forcibly stops the light emission of the built-in flash 5 in response to the light emission stop signal, whereby the light emission amount of the built-in flash 5 is controlled to a predetermined light emission amount.

In the camera body 2, the A / D converter 205 converts each pixel signal of the image signal into a 10-bit digital signal. The A / D converter 205 is
A / D input from an A / D clock generation circuit (not shown)
Each pixel signal (analog signal) is converted into a 10-bit digital signal based on a clock for D conversion.

In the camera body 2, a timing control circuit 202 for generating a reference clock, a timing generator 314, and a clock for the A / D converter 205 is provided. The timing control circuit 202 is controlled by the overall control unit 211.

The black level correction circuit 206 corrects the black level of the pixel signal (hereinafter, referred to as pixel data) A / D converted by the A / D converter 205 to a reference black level. A white balance circuit (hereinafter, referred to as a WB circuit) 207 performs level conversion of pixel data of each of R, G, and B color components so that the white balance is adjusted after the γ correction. WB circuit 207
Converts the level of the pixel data of each of the R, G, and B color components using the level conversion table input from the overall control unit 211. The conversion coefficient (gradient of the characteristic) of each color component in the level conversion table is set by the overall control unit 211 for each captured image.

The γ correction circuit 208 corrects γ characteristics of pixel data. The γ correction circuit 208 has, for example, six types of γ correction tables having different γ characteristics, and performs γ correction of pixel data using a predetermined γ correction table according to a shooting scene or shooting conditions.

The image memory 209 is a memory for storing pixel data output from the gamma correction circuit 208. The image memory 209 has a storage capacity for one frame. That is, in the image memory 209, the CCD 303
In the case of having pixels in rows and m columns, it has a storage capacity for pixel data of n × m pixels, and each pixel data is stored in a corresponding pixel position.

The VRAM 210 is a buffer memory for image data reproduced and displayed on the display unit 10. VRAM2
Reference numeral 10 has a storage capacity of image data corresponding to the number of pixels of the display unit 10.

In the photographing standby state, each pixel data of the image picked up by the image pickup unit 3 every 1/30 (second) is
After being subjected to predetermined signal processing by the A / D converters 205 to γ correction circuit 208, the signals are stored in the image memory 209, transferred to the VRAM 210 via the overall control unit 211, and displayed on the display unit 10. . Thus, the photographer can visually recognize the subject image from the image displayed on the display unit 10. In the reproduction mode, the image read from the memory card 8 is subjected to predetermined signal processing by the overall control unit 211, and then transferred to the VRAM 210.
It is reproduced and displayed on the display unit 10.

The card I / F 212 is an interface for writing image data to the memory card 8 and reading image data. Also, the communication I / F 21
Reference numeral 3 denotes an interface compliant with, for example, the IEEE 1394 standard for connecting the digital camera 1 so as to be able to communicate with the outside.

The flash control circuit 214 is a circuit for controlling light emission of the built-in flash 5. The flash control circuit 214 controls the presence / absence of light emission of the built-in flash 5, the amount of light emission, the light emission timing, and the like based on the control signal of the overall control unit 211. Is controlled.

The RTC 219 is a clock circuit for managing the shooting date and time, and is driven by another power source (not shown).

The operation unit 250 is an input / output device for the overall control unit 211. The Up key 6, Down key 7, Shutter button 9, FL mode setting key 11, Compression ratio setting switch 12, A reproduction mode setting switch 14 and the like are included.

As described above, the touch panel 315
Data provided on the CD display unit 10 and input by the touch panel is transmitted to the V through the superimpose unit 316.
The image is synthesized with the image in the RAM 210, displayed on the display unit 10 in real time, and transferred to an external device (projector) via the communication I / F 213.

The overall control section 211 is composed of a microcomputer, and controls the driving of each member in the image pickup section 3 and the camera body section 2 in an organic manner so as to control the photographing operation of the digital camera 1 overall. is there. In addition, as described later, when connected to a projector, a predetermined process is executed or data transmission / reception is controlled.

In the photographing mode, when photographing is instructed by the shutter button 9 in the photographing mode, the overall control unit 211 displays the thumbnail image of the image taken in the image memory 209 after the photographing instruction and the compression ratio set by the compression ratio setting switch 12. A compressed image compressed by the JPEG method using K is generated, and tag information (frame number, exposure value, shutter speed, compression ratio K, shooting date, flash on / off data at shooting, scene information, image ) Are stored in the memory card 8 together with the information such as the judgment result of the above).

The memory card 8 has a compression ratio of 1/20
0 frames of images can be stored, and for each frame, the above-described tag portion, high-resolution image data (640 × 480 pixels) compressed in JPEG format, and image data for thumbnail display (80 × 60 pixels) Is recorded. For example, each frame can be handled as an image file in the EXIF format.

FIG. 6 shows a presentation system using the digital camera 1.

The presentation system includes, but is not limited to, a liquid crystal projector 400, and the digital camera 1 is directly connected to the liquid crystal projector 400. Then, the display unit 10 of the digital camera 1
Are projected on the screen 300 by the liquid crystal projector 400.

Next, data processing in the presentation system shown in FIG. 6 will be described with reference to the flowchart in FIG. In the following description and drawings,
Step is abbreviated as “S”.

First, if the power is on in S1, the digital camera 1 determines in S2 whether the mode is the shooting mode or the reproducing mode. If the mode is the shooting mode, the digital camera 1 performs a shooting process in S3.
If the mode is the reproduction mode, the image recorded on the memory card 8 is displayed on the LCD display unit 10 in S4.

Next, in S5, it is determined whether or not the projector 400 is connected. If it is connected (YES in S5), the displayed image is transmitted to the projector 400 in S6. On the other hand, the projector 40
0 receives an image in S400, performs image processing for projection in S401, and projects the image in S402.

FIG. 8 shows an electrical configuration of the projector 400. In this projector 400, the digital camera 1
The data transmitted from the interface (I
F) The image data is received through the image processing unit 401 and processed for projection by the image processing circuit 402, and then the liquid crystal 404 is displayed by the driver 403.
To display an image. The image displayed on the liquid crystal 404 is illuminated by a light source 405 disposed behind the liquid crystal 404, and the projection optical system 4 disposed in front of the liquid crystal 404.
06 on the screen 300.

Thus, the display unit 10 of the digital camera 1
After projecting the image displayed on the screen 300 on the screen 300, the projector 400 determines whether the reception from the digital camera 1 has been completed in S403, and if not completed (NO in S403), returns to S401 and ends. Image processing and image projection are repeated until the image is processed. If the reception has ended (YES in S403), the process on projector 2000 side ends.

On the other hand, on the digital camera 1 side, in S7,
It is determined whether there has been any handwritten input of an arbitrary figure, character, or the like by the operator via the touch panel 315 on the LCD display unit 10. If there is an input (YES in S7), S
At step 8, the input address is detected, and the pixel of the LCD display unit 10 corresponding to the input address is displayed in, for example, black or red. This is shown in FIG. FIG. 9 shows the image A shown in FIG.
FIG. 2 is an enlarged view of a tire portion A1 of a car which is a part of the vehicle. The pixel B1 on the LCD corresponding to the address (X, Y) specified by the touch panel 315 is displayed in black.

The figures, characters, and the like input from the touch panel 315 are combined with the image on the VRAM 210 in S9 and displayed in an overlapped manner.

Next, in S10, it is checked whether or not the projector 400 is connected.
(YES at 0), an image, a figure, etc. are transmitted to the projector 400 in S11, and the image is projected by the projector 400 according to the procedure of S400 to 403 described above. Thus, the image captured by the digital camera 1 and the handwritten data are sent directly to the projector 400 and projected.

Next, in S12, it is checked whether or not the display screen of the display unit 10 has been updated. If there is no handwriting input from the touch panel 315 in S7 (NO in S7),
Also, when the projector 400 is not connected in S10 (NO in S10), the process proceeds to S12.

If the screen has been updated in S12 (YES in S12), a new screen is read in S13, and if the screen has not been updated (NO in S12), Proceeding to S14, it is checked whether the power is off. If it is not off (NO in S14), the process returns to S2 and repeats the above-described processes of S2 to S14. on the other hand,
If the power is off (YES in S14), the process ends.

[0054]

According to the digital camera of the present invention, since a photographed image can be directly transmitted to the projection device, the structure is simpler and very simple as compared with a conventional presentation system which requires a computer. This makes it possible to construct a presentation system that is easy to use.

Furthermore, since the photographed image and the handwritten data are combined and transmitted to the projection device, the digital camera can add the handwritten description and the additional drawing to the content image so that the handwritten description and the like can be added to the content image. In the added mode, the image can be projected on a screen or the like by the projection device, and there is no need to add a handwritten explanation or the like on the screen.

Further, since the input means capable of inputting the handwritten data is provided on the display means for displaying the photographed image, the position of the handwritten data with respect to the photographed image can be easily confirmed. Are combined and displayed on the display means, so that it is easy to confirm the projected content, and the digital camera can be made extremely effective for presentation.

[Brief description of the drawings]

FIG. 1 is a front view showing a digital camera according to an embodiment of the present invention.

FIG. 2 is a rear view showing the digital camera.

FIG. 3 is a bottom view showing the digital camera.

FIG. 4 is a diagram showing a positional relationship between a display unit and a touch panel in the digital camera.

FIG. 5 is a block diagram showing an electrical configuration of the digital camera.

FIG. 6 is a configuration diagram of a presentation system using the digital camera.

FIG. 7 shows the presentation system of FIG.
5 is a flowchart illustrating processing between the digital camera and the projector.

FIG. 8 is a block diagram showing a configuration of the projector shown in FIG.

FIG. 9 is a diagram illustrating a state in which a captured image and handwritten data are being combined;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Digital camera 10 ... Display part (display means) 211 ... General control part 213 ... Communication interface 315 ... Touch panel (input means) 400 ... Projector (projection apparatus) A ... Photographed image B ... Handwriting data

Continued on the front page (51) Int.Cl. ⁶ Identification symbol FI // G03B 13/02 G03B 13/02

Claims (1)

[Claims] 1. A digital camera connectable to a projection device, comprising: display means for displaying a captured image; input means provided on the display means for inputting arbitrary handwritten data; A digital camera, comprising: display control means for combining input handwritten data with an image and displaying it on a display means; and transmission means for transmitting the content displayed on the display means to the projection device. .