JPH0998377A - Electronic image pickup system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain the electronic image pickup system in which image data stored in an external FDD device are transferred to an electronic image pickup device and displayed thereon. SOLUTION: An FDD device 80 connects to an interface 67 of a camera 1, and when compressed image data from the interface 67 are fed to the FDD device 8, the compressed image data are stored in an FDD 84 in the lump. When the image data from the FDD 84 are sent from an interface 81 of the FDD device 80 to the camera 1, the data are displayed on an LCD 6 of the camera 1 and also displayed on an external display device such as a home use large sized television screen.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electronic image pickup device comprising a camera section having a taking lens and a main body section having a display device such as a finder and a liquid crystal for a monitor and an external floppy disk drive (hereinafter referred to as FDD). ) An electronic imaging system in which devices are combined.

[0002]

2. Description of the Related Art As one of electronic image pickup devices, a photographing lens and a CCD (Charge Coupled Dev) are used.
ice: a solid-state image sensor, and a liquid crystal display device (Liquid Crystal) that also serves as a viewfinder during image recording and a monitor during image reproduction.
al Display (hereinafter referred to as LCD monitor)
There is known a digital still camera with an LCD.

This digital still camera with an LCD is a CCD that converts a signal from the CCD into a video signal.
Color process processing is executed, and video through display for monitoring a video screen as a viewfinder on an LCD monitor is enabled, and image recording is possible in a storage unit using a flash memory or the like. Note that the viewfinder monitor of the image captured by the CCD on the LCD monitor is called "video through display".

By the way, in such a digital still camera with an LCD, when the user wants to see an imaged screen, the image is reproduced on an LCD monitor which also serves as a finder.
When it is desired to view the image on a larger screen, it is considered to connect a large-screen television for home use for reproduction.

Recently, a personal computer is connected and image data picked up by a digital still camera with an LCD is used for external FDD of the personal computer.
It is also considered to transfer a large amount of image data to an apparatus and store it in an FDD or the like.

[0006]

However, the storage of image data in the external FDD so far is based on the control of the personal computer, and there is no external FDD for storage that can be directly connected to the digital still camera with LCD. It was Further, in order to see the image data recorded on the floppy disk of the external FDD, it was necessary to read the image data from the floppy disk under the control of the personal computer and confirm it on the screen of the personal computer.

The present invention has been made in view of the above circumstances, and an external FDD device is directly connected to a digital still camera with an LCD, and image data recorded on a floppy disk of the external FDD device is displayed on the digital still camera with an LCD. It is an object of the present invention to provide an electronic imaging system that can be easily confirmed by the LCD of the above.

[0008]

In order to solve the above-mentioned problems, the invention according to claim 1 is an electronic image pickup device integrally provided with an image pickup means and an image display means for displaying an image picked up by the image pickup means. In an electronic image pickup system including the electronic image pickup device and an external floppy disk drive device detachably connected to the electronic image pickup device, an image processing means for taking in the image data picked up by the image pickup means and a taken-in image are taken in the electronic image pickup device. A compression / decompression means for compressing / decompressing an image signal, a memory for storing captured image data or compressed image data, a control means for controlling the entire system, and a digital input / output means for digitally inputting / outputting the image data. And an analog output means for analog output of image data, and by the analog output means an external display device. Connected to the external floppy disk drive device by the digital input / output means, and image data recorded on a floppy disk set in the external floppy disk drive device is displayed by the electronic image pickup device. And means for displaying on the means.

According to a second aspect of the present invention, in the first aspect, the image data recorded on the floppy disk set in the external floppy disk drive device is externally output via an analog output means of the electronic image pickup device. It has means for displaying on a display device.

As a result, according to the first aspect of the present invention,
Image data compressed by the digital input / output means of the electronic image pickup device can be transferred to the external floppy disk drive device, and compressed image data from the external floppy disk drive device can be received by the electronic image pickup device. A large amount of data can be collectively recorded in an external floppy disk drive device,
Image data from an external floppy disk drive can be displayed on the image display means of the electronic image pickup device, and the transfer image to the electronic image pickup device is officially determined while checking the image displayed on the image display device. The image display means of the electronic image pickup device can be effectively used for the image data of the external floppy disk drive device.

According to the second aspect of the invention, the image data recorded on the floppy disk of the external floppy disk drive device is displayed on the external display device connected through the analog output means of the electronic image pickup device. Since it is also possible to enjoy it, for example, it can be enjoyed on a large-screen television for home use.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows a digital still camera with an LCD as an example of an electronic image pickup apparatus applied to the system of the present invention.

As shown in the figure, the LC is an electronic camera device.
The digital still camera 1 with D has a main body 2 and a camera 3
It is composed of two blocks divided into and. That is, the LCD 6 is provided in the case 4 of the main body 2, and the LCD 6 is directed to the rear surface side of the case 4.

A photographing lens 7 is provided in the upper part of the case 5 of the camera unit 3, and the photographing lens 7 is provided.
Are directed to the front side of the case 5. The main body 2 is provided on the upper surface of the case 4 with a power switch 8, a shutter button 9, a delete key 10, a plus key 11, a minus key 12, a mode key 13, and a display key 1.
4, a zoom key 15 and a self-timer key 16 are provided, and an external power supply terminal (not shown) is provided in the opening / closing lid 17.
It has a video output terminal and a digital input / output terminal.

Further, a function switching key 18 is provided on the front surface of the case 4, and a tripod hole (not shown) is provided on the lower surface of the case 4. The case 4 of the main body 2 described above has a grip portion 20 having a grip-shaped portion having a bulging shape so that the right-hand operation side by the photographer can be easily grasped by hand.
An openable battery lid (not shown) is provided on the lower surface corresponding to the grip portion 20. The shutter button 9 is located on the upper surface of the grip portion 20.

The camera section 3 is arranged on the side surface of the main body section 2 on the left hand operation side by the photographer, as shown in FIG.
As shown in FIG. 2, the main body 2 is assembled so as to be rotatable 90 ° forward and 180 ° rearward.

FIG. 3 shows a circuit configuration of the digital still camera with an LCD constructed as described above. The CCD 40 converts an image signal into an electric signal, the A / D converter 52 converts an analog signal into a digital signal, A timing generator 53 that generates a timing signal that controls a drive circuit 54 that drives the CCD 40, and a compression / expansion circuit 5 that compresses / expands a digital image signal by encoding / decoding.
DRA for temporarily recording the captured digital image signal
M56, a CP that operates based on a program stored in a flash memory 57 that stores a compressed image signal and a ROM 58, and that operates based on an input from a key input unit 60 using the RAM 59 as a work RAM
U61, a signal generator 62 for generating a digital video signal by adding a synchronization signal to the digital image signal,
VRAM 63 for recording a digital video signal, D / A converter 64 for converting a digital video signal output from the signal generator 62 into an analog signal, amplifier 6
5, an LCD 6 that drives a liquid crystal based on an analog video signal input via the LCD 6 to display an image, and an interface 67 that inputs and outputs an image signal converted into a serial signal by the CPU 61.

An FDD device 80 is connected to the interface 67. FIG. 4 shows an external view of the FDD device 80. In the figure, 10 is an FDD device body, and this device body 10 has a disc insertion opening 1 on the front side.
1. Eject button 12 for disc ejection operation,
A disk access LED 13 is arranged, and in front of the upper surface, a "save all" key 14 for setting a mode for saving all images in the camera to a floppy disk, and a mode for returning all images in the floppy disk to the camera are set. A "return all" key 15, a stop / No key 151, an execute / Yes key 152 are arranged, and in addition to the LCD 16, a mode for checking the image in the FDD is set at the center of the upper surface. Key 17, “Save” key 1 to set the mode to save the images from the camera one by one
8, "Return" key 19 to set the mode to return the images of the camera to the camera one by one, "Erase" key 30 to set the mode to erase the images in the FDD one by one, to initialize the images in the FDD "Initialize" key 31, which sets the mode,
A page return key 32 and a page feed key 33 are arranged, and a power switch 34 and a serial terminal 35 connected to the above-mentioned interface 81 are arranged on the side surface.

FIG. 5 shows an example of display on the liquid crystal panel 16. 1601 is a "see" mark corresponding to the "view" key 17, and 1602 is a "save all" mark corresponding to the "save all" key 14. , 1603 is "Return all" key 1
"Restore all" mark corresponding to 5, 1604 is "Save"
A “save” mark corresponding to the key 18, 1605 is a “return” mark corresponding to the “return” key 19, 1606 is an “erase” mark corresponding to the “erase” key 30, 1607
Is an "Initialize" mark corresponding to the "Initialize" key 31, 1
Reference numeral 608 denotes a “data direction display” mark that indicates the direction of data flow and whether the transfer is being executed / standby, 1609 is an “error” mark that is turned on when an error occurs, and 1610 is turned on when the camera is connected. "Camera" mark, 1611 is a "camera battery drain" mark that lights up when the camera battery is exhausted, 1612 is a "memory over mark" that lights when a transfer stop occurs due to memory overflow, and 1613 is a disc inserted A "disk" mark that is turned on at some time, 1614 is a disk usage display that sequentially lights according to the disk usage, 1615 is a date display that displays the page number when displaying an image in the disk, and 1616 is a "camera image" Please select "mark,
Reference numeral 1617 is a "delete camera image" mark, 1618 is a "replace disk" mark, and 1619 is an "OK" mark for requesting the user to press either the execute key or the stop key.

FIG. 6 shows an FDD device 8 constructed as described above.
An example in which 0 is connected to the interface 67 of the digital still camera with LCD 1 via a cable 90 is shown. In this case, the FDD device 80 has an interface 81 connected to the cable 90 from the LCD digital still camera 1, the interface 81 is connected to the control circuit 82, and the CPU 82 is provided with the ROM 83, F.
The LCD 16 and the keyboard 88 having the above-described keys are connected via the DD 84, the image memory 85, and the LCD driver 86.

In such an FDD device 80, RO
According to the program prepared in M83, the control circuit 82 executes the mode corresponding to the operation of each key described above. When the digital image data converted into a serial signal from the interface 67 of the camera 1 is given to the interface 81 through the cable 90, the control circuit 82 instructs the FDD 84 to store the image data and the image data stored in the FDD 84. When read out, it is temporarily stored in the image memory 85 and then displayed on the LCD 16 via the LCD driver 86, or the LCD on the camera 1 side through the cable 90 from the interface 81.
6 or even as a VIDEOOUT on an external display device such as a home large-screen TV.

FIG. 7 shows a transfer state of image data between the camera 1 and the FDD device 80. The image data compressed on the camera 1 side is sent to the FDD device 80, and the compressed image data remains in the FDD 84. Stored in the FD
The compressed image data from D84 is sent to the camera 1 side. In this case, on the camera 1 side, the FDD
Compressed image data from the device 80 to the flash memory 5
7, and is expanded by the compression / expansion circuit 55 and displayed on the LCD 6 or an external display device.

FIG. 8 shows a flow chart when the image data from the FDD 84 of the FDD device 80 is transferred to the camera 1 side. In this case, on the FDD device 80 side,
In step 701, the “see” key 1 on the keyboard 88
7 is operated, the mode for confirming the image in the FDD is set, and after confirming the image, when the transmission mode is set in step 702, the interface 8 is set in step 703.
1, the control data for transmitting the first image is transmitted to the camera 1 through the cable 90, and the corresponding image data is transmitted in step 704.

On the camera 1 side, in step 801, the FD
When the control data from the D device 80 is received, the contents thereof are confirmed, and in step 802, the image data is received. Then, in step 803, it is expanded by the compression / expansion circuit 55, and in step 804, it is displayed on the LCD 6 or, if necessary, displayed on an external display device such as a home large-screen television.

When one image is displayed,
At step 805, the control data is transmitted from the interface 67 to the FDD device 80 through the cable 90. On the FDD device 80 side, when the control data is received in step 705, it is determined in step 705 whether or not the page key, here the page return key 22 or the page feed key 23 is operated, and if the key operation is determined here, Returning to step 703, the control data relating to the transmission of the next one image comes to be transmitted.

Therefore, in this way, when the FDD device 80 is connected to the interface 67 of the camera 1 and the compressed image data is sent from the interface 67 to the FDD device 80, these compressed image data are sent to the FDD 84. It is possible to collectively store a large amount, and by sending the image data from the FDD 84 to the camera 1 side from the interface 81 of the FDD device 80,
It can be displayed on the LCD 6 of the camera 1, and V
It becomes possible to display it as an external output on an external display device such as a home-use large screen television.

Thus, while the image data in the FDD 84 is sent to the camera 1 side and displayed on the LCD 6,
You can check the images in the DD84 one by one, and after making this confirmation, you can select whether to officially transfer the images to the camera 1 side. In contrast, the LCD 6 on the camera side can be effectively used.

Further, since the image data in the FDD 84 can be displayed on an external display device other than the LCD 6 of the camera 1, it is possible to enjoy the image in the FDD 84 on a home-use large screen television or the like.

Next, in such a digital still camera with an LCD as described above, in FIG. 3, a timing signal is output from the timing generator 53 at a predetermined cycle to control the drive circuit 54, and the object image formed by the CCD 40 is handled. The captured image signal is captured, the analog signal is converted into a digital signal by the A / D converter 52, and the digital signal is temporarily stored in the DRAM 56. In this case, DRAM5
The image pickup signal from the CCD 40 stored in 6 is stored in the CCD 4
Those that have passed through the 0 color filter, such as Ye,
It has color components such as Cy and Gr.

Then, the CPU 61 executes the flowchart shown in FIG. 9 based on the image pickup signal stored in the DRAM 56, and executes the image signal for the video through display of the monitor by the image processing in the high speed mode and the image processing in the high image quality mode. An image signal for image recording is generated.

First, in step 201, a luminance signal generation process with a reduced amount of information is executed. In this case, the luminance signal is generated by Ye and C of the signal read from the DRAM 56.
Of the y and Gr components, for example, only the Ye component is used for generation, and as shown in FIG.
A part of the image pickup signal stored in the DRAM 56 is selected, and the process proceeds to step 302, where the selected signal is prefiltered. Specifically, as shown in FIG. 12, Ye (n-1), Cy (n-1), and G sent serially are sent.
(N-1), Ye (n), Cy (n), G (n), ... are the corresponding signal Ye (n) and Ye on both sides of the corresponding signal, that is, Ye (n-1), Ye (n), The Ye data of 3 pixels in total from Ye (n + 1) are weighted by 1, 2, and 1 times, respectively, and a pre-filter consisting of an LPF is applied.

Then, in step 303, γ correction (because the brightness and LCD characteristics are not linear, brightness and LCD
The characteristic opposite to the above is corrected so that it becomes linear when displayed on the LCD. ) To generate a luminance signal.

Then, returning to FIG. 9, the process proceeds to step 202, and the color signal generation processing corresponding to the luminance signal with the reduced amount of information is executed. In this case, as shown in FIG. 11, in the generation of the color signal, in step 402, the Ye, Cy, and G component signals read from the DRAM 56 are applied to the corresponding signal and a continuous total of 5 pixels from both sides of the applicable signal. Generate data and apply prefilter. Specifically, as shown in FIG. 12, Ye (n-1) and Cy (n-) sent in serial are sent.
1), G (n-1), Ye (n), Cy (n), G
(N), ... is the corresponding signal Ye (n) and 4 on both sides of the corresponding signal.
Data, namely Cy (n-1), G (n-1),
A total of 5 pixels of data from Ye (n), Cy (n), and G (n) are weighted 1 times, 2 times, 3 times, 2 times, and 1 time, respectively, and pre-filtered.

Then, here, Y is prefiltered.
Step 403 for the e, Cy, and Gr component signals
In step 404, white balance (correction of color signal variations due to color filter variations, which corrects white signals to white) is performed, and color calculation is performed in step 404 to call RY and BY. Generate a color signal.

Next, returning to FIG. 9, the process proceeds to step 203, where the luminance signal and the color signal generated in steps 201 and 202 are transferred to the signal generator, converted into a video signal, and displayed on the LCD 6 as video through on the monitor. Is done.

Next, in FIG. 9, the routine proceeds to step 204, where it is judged whether or not the recording key (shutter button) of the key input section 60 is pressed. If the record key is not pressed, the process returns to step 201 and the above operation is repeated.

As a result, the video through display of the LCD 6 is continued, but the video through display at this time is DRA
Since the image signals read out from M56 are combined to reduce the number of pixels to be processed and the processing procedure is also reduced, high-speed video through display is possible, which allows smooth movement of the monitor screen. Therefore, it is possible to refresh the monitor screen of several frames or more per second, for example.

Next, at step 204 shown in FIG. 9, when it is determined that the record key of the key input unit 60 is pressed,
Proceeding to step 205, high-quality luminance signal generation processing is executed. In this case, for the generation of the luminance signal, for the signal read from the DRAM 56, as shown in FIG. 13, first, in step 501, the corresponding signal and continuous data of 7 pixels in total from both sides of the corresponding signal are generated. Pre-filter is applied, γ correction is applied in step 502, step 50
Balance moiré with 3. The variation in the luminance signal due to the variation in the color filter is corrected by the moiré balance.

Then, in step 504, high-frequency component noise is reduced by applying an LPF, and in step 505, an enhancer process is performed to generate a luminance signal. The enhancer processing in this case is to enhance the resolution by emphasizing the edge portion because the high frequency component becomes dull and the resolution is lowered by applying the LPF.

Then, returning to FIG. 9, the routine proceeds to step 206, where the color signal generation processing corresponding to the luminance signal of high image quality is executed. In this case, as shown in FIG. 14, the generation of the color signal is performed by, in step 601, regarding the Ye, Cy, and Gr component signals read from the DRAM 56, the corresponding signal and a total of 11 consecutive pixels from both sides of the corresponding signal. Pre-filter the data in. Then, with respect to the Ye, Cy, and G component signals that have been prefiltered here, white balance is applied in step 602, and step 603 is performed.
Color calculation is performed to generate color signals RY and BY.

Next, returning to FIG. 9, the process proceeds to step 207, where the luminance signal and the color signal generated in steps 205 and 206 are transferred to the compression / expansion circuit 55, and the compression / expansion circuit 55 causes the luminance signal and the color signal. The signal is encoded to be compressed, and the compressed image signal (luminance signal and color signal) is transferred to the flash memory 57 and recorded.

Then, again returning to step 201,
The above operation is repeated. As a result, in the image recording in the flash memory 57, since fine signal processing is performed without performing pixel blinking, a high quality image can be recorded.

On the other hand, when reproducing the image signal, the key input unit 6
When the reproduction key is operated at 0, a predetermined compressed image signal (compressed luminance signal and color signal) is read from the flash memory 57 and transferred to the compression / expansion circuit 55. Then, the luminance signal and the color signal are expanded, and the signal generator 62
Generate a digital video signal by adding a sync signal with
The data is displayed on the LCD 6 via the / A converter 64 and the amplifier 65.

In this way, the CPU 61 causes the DR
An image signal for video through display on the LCD 6 by image processing in the high speed mode and an image signal for image recording by image processing in the high image quality mode are respectively generated based on the image pickup signal stored in the AM 56, and the image signal for LCD 6 is generated. For video through display, high-speed mode image processing enables DRAM
When the pixels of the image pickup signal stored in 56 are scattered to reduce the number of pixels to be processed to generate a luminance signal and a color signal as an image signal, and when an image is recorded in the flash memory 57, DRAM by image processing in image quality mode
By generating a luminance signal and a chrominance signal by fine signal processing without performing the pixel bleeding of the image pickup signal read out from 56, the video through display on the LCD 6 can be performed at high speed. In order to smooth the movement of the monitor screen, the monitor screen can be refreshed for several frames or more per second, for example, and the image recording in the flash memory is performed with fine signal processing, which results in high image quality. The image of can be recorded and reproduced. Also, there are two color processes for video through display and for creating a recorded image signal.
By adopting different kinds of color processes, it becomes possible to realize these processes by software that has a large time constraint, and thus it is possible to realize a large size reduction and cost reduction of the device.

FIG. 15 is a diagram for more specifically explaining the color process processing by such software. In the figure, 71 is a CCD, and this CCD 71
Is a 1/5 inch 270,000 pixel frame transfer type CCD, and uses a Ye (yellow) Cy (cyan) G (green) stripe filter as a filter.

Here, the frame transfer type CCD is adopted because such a CCD has a separate exposure section and storage section, and is therefore less susceptible to external light when reading data.

A core IC 72 is connected to the CCD 71. The core IC 72 has an analog processing unit 721, an amplifier 722, an A / D converter 723, and a CCD drive signal generator 724.
After the analog processing unit 721 performs CDS (correlation double sampling), the A / D converter 72 is passed through the amplifier 722.
It is A / D converted at 8 bits and digitally output at 3.

A data bus 73 is connected to the core IC 72, and the CPU 74 and D are connected to the data bus 73.
A RAM 75, a compression / expansion circuit 76, and a data encoder 77 are connected, and a VRAM is connected to the data encoder 77.
An LCD 79 is connected via 78.

The CPU 74 uses the DMA in addition to the MPU 741.
It has a C742, a DRAM controller 743, and a bus controller 744, and the DMA data is transferred from the core IC 72 to the DRAM 7 by the DMA controller 743.
I am writing to 5. Further, the CPU 74 has a digital serial input / output terminal to which an external device (not shown) is connected.

The compression / expansion circuit 76 performs compression / expansion processing by encoding / decoding digital image data supplied from the data bus 73. The image data expanded by the compression / expansion circuit 76 can be output from the video output terminal as a digital video signal through the data encoder 77, recorded in the VRAM 78, and displayed on the LCD 79.

On the other hand, since the CCD 71 outputs one data in three clocks, when writing to the DRAM 75, DM
AC742 is set to 3 states. Also CCD
71 is S / unless data for one line is continuously read.
N ratio deteriorates. It takes about 120μ to read one line.
Therefore, this time becomes a problem when the DRAM 75 refresh is set to the CAS before RAS refresh, but the problem is solved by performing the refresh several times before reading.

In this way, the data exposed by the CCD 71 is developed on the DRAM 75 in the order of Ye, Cy, and G. Then, in such a configuration,
The color process is performed by software. In this case, in addition to the color process for creating a recorded image signal, a high-speed color process for video through display is used.
It employs different color processes.

First, in the color process mode for video through display, an LCD that does not require a high resolution is used as an image output destination, and the number of pixels used for calculation is reduced as much as possible to access the DRAM 75 and the number of calculations. Is used to generate image data as quickly as possible.

FIG. 16 shows a flowchart of the Y process (luminance signal generation process) for video through display. In this case, in step 1601, only the most sensitive Ye of the output data Ye, Cy, and Gr of the CCD 71 is used as the luminance original signal, and in step 1602, the gamma-processed one is directly used as the luminance signal. There is.

That is, here, assuming that the number of horizontal effective pixels of the CCD 71 is 480, 160 pixels are processed, and in the vertical direction, only 112 lines out of 240 effective lines of CCD data are processed. I do. That is, the number of data by this processing is 160 × 11
It becomes 2. In this Y process, special processing such as low-pass filter and edge enhancement is not performed because speedup is taken into consideration.

FIG. 17 shows a flowchart of the C process (color signal generation process) for video through display. First, in step 1701, processing by a low pass filter is performed. In this case, among the output data of the CCD 71, a certain Ye and two pixels before and after that (Cy (-1), Gr (-1), Ye (0),
Cy (1), Gr (1)) total 5 pixels 1, 2, 3, 2, 1
And the following data Yec, Cyc, Grc for color signal calculation are created.

Yec = (3 * Ye (0)) / 3 Cyc = (Cy (-1) + 2 * Cy (1)) / 3 Grc = (2 * Gr (-1) + Gr (1)) / 3 The low-pass filter is considered to be the minimum necessary to suppress chroma noise and edge noise while suppressing the processing time. Next, in step 1702, chroma calculation is executed. The chroma data RY / BY here is Ye.
The following operations are performed on c, Cyc, and Grc to generate them.

RY = KY1 × Yec + KC1 × Cyc + KG1 × Grc ... (1) BY = KY2 × Yec + KC2 × Cyc + KG2 × Grc ... (2) Coefficients KY1, KC1, KG1, KY2, KC2
KG2 will be described in AWB (auto white balance).

Then, step 170 is performed on this data.
In step 3, high luminance Gr removal and edge false color removal are performed to obtain a final color difference signal. This process is horizontal 8
It is performed for 0 pixels, Ye of vertical 56 pixels and two pixels before and after it. That is, the number of chroma data in the video through mode (viewfinder mode) is 80 × 56.

Next, in the color process mode for creating a recorded image signal, high definition image data for PC (personal computer) transfer and video output is generated. FIG.
8 shows a flowchart of a Y process (luminance signal generation process) for recording image signal generation. In this case, the problem in generating the luminance signal is the difference in sensitivity among the color filters Ye, Cy, and Gr of the CCD. If the CCD data is processed as it is, the image looks dark or the subject looks like stripes. In order to suppress this phenomenon, this system uses the following methods.

First, in step 1801, of the data Ye, Cy, and Gr of the CCD used for the calculation of the luminance signal, C
Multiply y · Gr by 1.2 and 1.5, respectively, and then Cy '· Gr'
(Moire balance), then step 1802
Then, a horizontal 7-tap low-pass filter (coefficients -1, 0, 4, 6, 4, 0, -1) is applied to the data to absorb the sensitivity difference between pixels.

Then, the final luminance signal is the step 1
In step 803 and step 1804, gamma processing and edge enhancement processing are performed on the data generated by the above processing to generate the data. Since the above processing is performed for all CCD effective pixels 480 × 240, the number of luminance signal data is 480 × 240.

FIG. 19 shows a flow chart of the C process (color signal generation process) for producing a recorded image signal. First, in step 1901, processing by a low pass filter is performed. In this case, of the output data of CCD,
A certain Ye and 5 pixels before and after it (Cy (-2), Gr (-2), Ye (-1), Cy
(-1), Gr (-1), Ye (0), Cy (1), Gr (1), Ye (2), Cy (2), Gr (2))
For a total of 11 pixels of 1, 2, 3, 4, 5, 6, 5,
By assigning coefficients of 4, 3, 2, and 1, as in the video-through mode, the color signal calculation data Yec, Cyc,
Make Grc.

Yec = (3 × Ye (-1) + 6 × Ye (0) + 3 × Ye (1)) / 12 Cyc = (Cy (-2) + 4 × Cy (-1) + 5 × Cy (1 ) + 2 × Cy
(1)) / 12 Grc = (2 × Gr (-2) + 5 × Gr (-1) + 4 × Gr (1) + G
r (2)) / 12 In step 1902, this data is subjected to the same calculation as equations (1) and (2), and then in step 1903, a high brightness G
A color difference signal is obtained by performing r removal and edge false color removal processing.

This processing is performed for Ye having 160 horizontal pixels and 120 vertical pixels and 5 pixels before and after it. That is, the final number of chroma data is 160 × 120. By the way, to explain AWB (auto white balance) mentioned in the above-mentioned C process (color signal generation process), the following relationship is established between the three primary colors R, G, and B in a state where white balance is achieved. It is made up.

R = G = B (3) The pixel data handled by this apparatus are three colors of Ye, Cy, and Gr, and R, G, and B are R = rky × Ye + rkc ×, respectively. Cy + rkg × Gr (4) B = bky × Ye + bkc × Cy + bkg × Gr (5) G = gky × Ye + gkc × Cy + gkg × Gr (6)

Here, assuming that rky ··· gkg are independent coefficients and Ye, Cy, and Gr are independent variables that change with time, R, G, and B are satisfied in order to satisfy (3). It is necessary to multiply each by a coefficient.
The coefficients for R, G, and B are RAMP and GA, respectively.
Letting MP and BAMP be Rw, Gw, and Bw where R, G, and B are in a state where white balance is achieved by the coefficients, equations (4), (5), and (6) can be expressed as follows.

Rw = (rky × Ye + rkc × Cy + rkg × Gr) × RAMP ·· (7) Bw = (bky × Ye + bkc × Cy + bkg × Gr) × BAMP ·· (8) Gw = (gky × Ye + gkc × Cy + gkg × Gr) × GAMP ··· (9) Then, when the color difference signals RY and BY in this state are (RY) (w) and (BY) (w), (RY) (w) = Ir x (Rw-Gw) + Jb x (Bw-Gw) ··· (10) (BY) (w) = Ib x (Bw-Gw) + Jr x (Rw-Gw) · · (11), From the condition, (RY) (w) = 0, (BY) (w) = 0, that is, Ir * (Rw-Gw) + Jb * (Bw-Gw) = 0 ... (12) Ib * ( Rw−Gw) + Jr × (Rw−Gw) = 0 (13) Here, (RY) (w) and (BY) (w) are Y
If it is a function of e, Cy, and Gr, (RY) (w) = KY1 × Ye + KC1 × Cy + KG1 × Gr ·· (14) (BY) (w) = KY2 × Ye + KC2 × Cy + KG2 × Gr · (( When expressed as 15), (7) (8) (9) (12) (13) (1
4) From the equation (15), KY1 = Ir × rky × RAMP + Jb × bky × BA
MP- (Ir + Jb) × gky × GAMP KC1 = Ir × rkc × RAMP + Jb × bkc × BA
MP- (Ir + Jb) × gkc × GAMP KG1 = Ir × rkg × RAMP + Jb × bkg × BA
MP- (Ir + Jb) × gkg × GAMP KY2 = Ib × bky × BAMP + Jr × rky × RA
MP- (Ib + Jr) × gky × GAMP KC2 = Ib × bkc × BAMP + Jr × rkc × BA
MP- (Ib + Jr) × gkc × GAMP KG2 = Ib × bkg × BAMP + Jr × rkg × BA
MP- (Ib + Jr) × gkg × GAMP, and GAMP = “constant” RAMP = Gw × GAMP / Rw BAMP = Gw × GAMP / Bw.

As a result, when the color difference signal is calculated by the C process, only the calculation of the equations (1) and (2) is required, so that the number of calculations can be reduced and the calculation time can be shortened. By the way, when trying to realize such an AWB, if the above white balance calculation is performed without correlation in the time axis direction, in extreme terms, the color of the same subject changes for each viewfinder mode screen. Such a phenomenon occurs. To calculate the white balance, Ye of the whole screen,
Integral values of Cy and Gr INTEG _- Ye, INTEG _- C
If y, INTEG _- Gr is used, for example, there is a subject with a red object in a white background (A) and a subject with a blue object in a white background (B), and the camera is (A).
When it is suddenly swung from (B) to (B), the information of the entire screen changes, and the background white, which should be the same color, changes from blue to red. Therefore, in order to prevent such a phenomenon, this system uses INT to calculate the WB of the nth screen.
Without using EG _- Ye, INTEG _- Cy, INTEG _- Gr, INTEG _- Yen = (ΣINTEG _- Ye (k)) /
_{16 INTEG - Cyn = (Σ INTEG} - Cy (k)) /
16 INTEG _- Grn = (ΣINTEG _- Gr (k)) /
16 is used.

That is, Y for the previous 15 screens is calculated for WB.
By using the data of e, Cy, and Gr, it is possible to prevent the appearance color from being greatly changed. Therefore, by adopting this, by adopting two types of color processes, that is, a color process for video through display and a color process for creating a recorded image signal, these processes can be performed by software that has a large time constraint. It is possible to realize a large size reduction and cost reduction of the device, and by executing these color processes, high-speed video through display and recording / reproduction of high-quality images can be realized. You can also

[0071]

As described above, according to the present invention, the image data compressed by the digital input / output means of the electronic image pickup device can be transferred to the external floppy disk drive device, and the compressed image from the external floppy disk drive device can be transmitted. Since the data can be received by the electronic image pickup device, the image data from the external floppy disk drive device can be displayed on the image display means of the electronic image pickup device, and the image can be transferred to the electronic image pickup device while confirming the image displayed on the image display means. For example, it becomes possible to officially determine the image,
The image display means of the electronic image pickup device can be effectively used for the image data of the external floppy disk drive device.

Further, since the image data recorded on the floppy disk of the external floppy disk drive can be displayed on the external display device connected through the analog output means of the electronic image pickup device, for example, a large screen television for home use. It will be possible to enjoy it.

[Brief description of drawings]

FIG. 1 is a perspective view showing a digital still camera with an LCD as an example of an electronic image pickup apparatus to which the present invention is applied.

FIG. 2 is a plan view of the main body of the digital still camera with LCD shown in FIG. 1 when the camera is rotated 90 ° forward and viewed from the top side.

FIG. 3 is a diagram showing a circuit configuration of the digital still camera with LCD shown in FIG.

FIG. 4 is a diagram showing the external appearance of an FDD device connected to the LCD digital still camera of FIG. 1.

5 is a diagram showing a display example on an LCD of an FDD device connected to the digital still camera with LCD of FIG.

FIG. 6 is a digital still camera with LCD and FDD of FIG.
The figure which shows the example of a connection of a device.

7 is a digital still camera with LCD and FDD of FIG.
The figure which shows the data transfer state between the apparatuses.

FIG. 8 is a digital still camera with LCD and FDD of FIG.
FIG. 3 is a diagram for explaining data transfer with a device.

9 is a flowchart for explaining the operation of the LCD-equipped digital still camera shown in FIG.

10 is a flowchart for explaining the operation of the LCD-equipped digital still camera shown in FIG.

FIG. 11 is a flowchart for explaining the operation of the LCD-equipped digital still camera shown in FIG.

FIG. 12 is a diagram for explaining a pre-filter of the digital still camera with LCD of FIG.

FIG. 13 is a flowchart for explaining the operation of the LCD-equipped digital still camera shown in FIG. 1.

FIG. 14 is a flowchart for explaining the operation of the LCD-equipped digital still camera shown in FIG.

15 is a diagram showing a more specific circuit configuration of the digital still camera with LCD of FIG.

16 is a flowchart for explaining the operation of a more specific operation of the digital still camera with LCD of FIG.

FIG. 17 is a flowchart for explaining the operation of a more specific operation of the digital still camera with LCD of FIG.

FIG. 18 is a flowchart for explaining a more specific operation of the LCD-equipped digital still camera shown in FIG. 1.

FIG. 19 is a flowchart for explaining a more specific operation of the digital still camera with LCD of FIG.

[Explanation of symbols]

 1 ... Electronic camera device 2 ... Main body part 3 ... Camera part 4,5 ... Case 6 ... LCD 7 ... Shooting lens 8 ... Power switch 9 ... Shutter button 11 ... Disc insertion slot 12 ... Eject button 13 ... Disc access LED 14 ... "Save all" key 15 ... "Restore all" key 16 ... LCD 17 ... "View" key 18 ... "Save" key 19 ... "Restore" key 30 ... "Erase" key 31 ... "Initialize" key 32 ... Page return key 33 ... Page feed key 34 ... Power switch 35 ... Serial terminal 20 ... Grip part 22 ... Focus switch 40 ... CCD 52 ... A / D converter 53 ... Timing generator 54 ... Drive circuit 55 ... Compression / expansion circuit 56 ... DRAM 57 ... Flash memory 58 ... ROM 59 ... RAM 60 ... Key input unit 61 ... CPU 62 ... Signal Generator 63 ... VRAM 64 ... D / A converter 65 ... Amplifier 67 ... I / O port 71 ... CCD 72 ... Core IC 73 ... Data bus 74 ... CPU 75 ... DRAM 76 ... Compression / expansion circuit 77 ... Data encoder 78 ... VRAM 79 ... LCD 80 ... FDD device 81 ... Interface 82 ... Control circuit 83 ... ROM 84 ... FDD 85 ... Image memory 86 ... LCD driver 87 ... LCD 88 ... Keyboard 90 ... Cable

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI Technical display location H04N 5/92 H04N 5/92 H 9/79 9/79 G

Claims (2)

[Claims] 1. An electronic image pickup device integrally provided with image pickup means and image display means for displaying an image picked up by the image pickup means, and an external floppy disk drive device detachably connected to the electronic image pickup device. In the electronic image pickup system, an image processing unit that captures image data captured by the image capturing unit, a compression / expansion unit that compresses / expands the captured image signal, and the captured image data or A memory for storing the image data, a control means for controlling the entire system, a digital input / output means for digitally inputting / outputting the image data, and an analog output means for analog-outputting the image data. It can be connected to an external display device by analog output means, and can be connected to the external display equipment by the digital input / output means. An electronic device which is connected to a floppy disk drive device and has means for displaying image data recorded on a floppy disk set in the external floppy disk drive device on an image display means of the electronic image pickup device. Imaging system. 2. A means for displaying image data recorded on a floppy disk set in the external floppy disk drive device on an external display device via an analog output means of the electronic image pickup device. The electronic imaging system according to claim 1.