KR0163917B1 - Electronic still video camera - Google Patents

Abstract

The present invention relates to an electronic still video camera having a built-in bidirectional image reproduction and recording device, wherein the image data shot by an electronic still video camera and recorded on a memory card is outputted using a viewfinder as a display device, Accordingly, the present invention relates to an electronic still video camera incorporating a bidirectional image reproduction and recording apparatus having an effect of deleting unwanted images by re-viewing wrongly shot image data, re-photographing them, and storing them in the deleted portion.

Description

Electronic Still Video Camera with Built-in Bidirectional Image Reproduction and Recording Device and its Control Method

1 is a block diagram of a conventional electronic still video camera,

2 is a block diagram of an electronic still video camera incorporating a bidirectional image reproduction and recording apparatus according to an embodiment of the present invention.

3 is a conceptual diagram of positions of recording / erasing / rewriting of frame images in a memory card according to an embodiment of the present invention;

4 is a flowchart illustrating a recording / erasing / rewriting control method of memory data of an electronic still video camera incorporating a bidirectional image reproduction and recording apparatus according to an embodiment of the present invention.

* Explanation of symbols for main parts of the drawings

1: solid state imaging device 2: analog / digital converter

3: multiplexer 4: tri-state buffer

5: frame memory 6: oversampling filter

7: interpolation circuit 8: memory card

9: video processor 10: digital-to-analog converter

11: electronic viewfinder 12: memory controller

13: Video format converter

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electronic still video camera having a bidirectional image reproducing and recording device and a control method thereof. More particularly, the present invention relates to displaying an image information recorded on a memory card by an external computer or an electronic viewfinder by having a bidirectional structure. The present invention relates to an electronic still video camera having a bidirectional image reproduction and recording device and a control method thereof.

Hereinafter, a conventional electronic still video camera will be described with reference to the accompanying drawings.

1 is a block diagram of a conventional electronic still video camera.

As shown in FIG. 1, the structure of the conventional electronic still video camera includes a solid state imaging device 10 for converting image light input from a subject into analog image data, and sampling of the solid state imaging device 10. As shown in FIG. The analog / digital (A / D) converter 20 which converts analog image data into digital image data at a ratio corresponding to the ratio, and the digitally converted image data which is an output of the analog / digital converter 20 are frame-by-frame. Each of the frame memory 30 stored in the memory, the oversampling filter 4 for oversampling the digital image data of the frame memory 30 by N times, and the pixels of the image data output from the oversampling filter 40. An interpolation circuit 50 for providing output image data having a clock ratio different from the clock ratio of the image data so that the aspect ratio becomes a square lattice, and the oversampling filter 40 And a memory card 60 that stores the result of photographing by a camera with data that has been transformed by the interpolation circuit 50, and digitally converted image data that is an output of the analog-to-digital converter 20. A video processor 70 for outputting data, a digital / analog (D / A) converter 80 for converting the digital signal processed data output from the video processor 70 into an analog signal and outputting the video signal; It consists of an electronic viewfinder 90 capable of displaying captured image data.

The operation of the conventional electronic still video camera by the above configuration is as follows. The solid-state imaging device 10 converts the image light input from the subject into analog image data, and outputs it to the analog / digital converter 20.

In the analog-to-digital converter 20, analog image data output from the solid state imaging device 10 is converted into digital image data at a rate corresponding to the sampling rate of the solid state imaging device 10 to convert the frame memory 30 and the video processor. Output to 70.

The flame memory 30 stores digital image data captured by the solid-state imaging device 10 and then output through the analog / digital converter 20 in units of frames.

The oversampling filter 40 oversamples the digital image data by N times in order to conform the image data to the photo standard.

The interpolation circuit 50 provides output image data having a clock ratio different from the clock ratio of the image data so that the aspect ratio of each pixel becomes a square lattice.

The memory card 60 stores the output of the interpolation circuit 50, and enables an application such as displaying image data from an external computer through constant format conversion.

The video processor 70 outputs image data converted into digital image by the analog-to-digital converter 20 as video image data.

This digital signal processed output can be used as a VCR by being output as a video signal via a digital / analog converter 80 to convert to an analog signal.

At the same time, the image data picked up through the electronic viewfinder 90 can be displayed.

However, the conventional electronic still video camera has a problem in that image data information stored in a memory card must always be displayed using an external computer in order to check whether the image is taken as the photographer intended. Accordingly, an object of the present invention is to solve the above-described problems, and has a structure that controls the memory card in both directions, thereby displaying the digital image data information stored in the memory card by the electronic viewfinder of the electronic still video camera. By allowing the data to be checked and redisplaying the image data already taken and stored in the memory card, delete unwanted image data from the memory card through the memory card controller and record the re-recorded image data on the spot. To provide an electronic still video camera with a built-in bidirectional image reproduction and recording device.

As a means for achieving the above object, the constitution of the present invention provides a solid state imaging device for converting image light input from a subject into analog image data, and digitally converts analog image data at a rate corresponding to a sampling rate of the solid state imaging device. An analog / digital converter for converting to image data, a multiplexer for selecting one of the image data output from the analog / digital converter and the image data stored in the memory card, and an input data of the frame memory in the image data correction mode in the memory card. A three-state buffer for controlling an input state, a frame memory for storing digitally converted image data, which is an output of the analog / digital converter, in units of frames, and an oversampling filter for oversampling the digital image data of the frame memory by N times. And the oversampling fill An interpolation circuit for providing output image data having a clock ratio different from the clock ratio of the image data so that the aspect ratio of each pixel of the image data output from the data becomes a square lattice, and the format-modified by the oversampling filter and the interpolation circuit. A memory card for storing the result of photographing by a camera with data, a video processor for outputting digitally converted image data, which is output of the analog / digital converter, as video image data, and a digital signal processing output from the video processor. Reads image data of specific address from digital / analog converter which converts data into analog signal and outputs it as video signal, electronic viewfinder which can display captured image data, and image data in frame unit stored in the memory card Memory to be erased or erased Group, comprises a video format converter for converting the video format to identify the image data of the picture stored in the memory card standard as a viewfinder.

Another aspect of the present invention to achieve the above object is to convert an optical image to an electrical video signal during image capturing using a solid-state imaging device, and to convert the format of the still image aspect ratio in order to conform to the specification, such as photographs Changing the data, storing the result of photographing the camera with the format-modified data on the memory card, determining whether information update of the image data recorded on the memory card is required, and the image recorded on the memory card. Performing display or printing by an external computer device when data update is not necessary; reading information from a memory card when updating information of image data recorded on a memory card; Changing the image data format that is a standard such as a read photograph into a video format, Displaying data changed to a video format through an electronic viewfinder, and determining whether information deletion is necessary in an image of a frame displayed by the electronic viewfinder, and determining whether information update is necessary when information deletion is unnecessary. Go to step 2, erase the information on the memory card when information erasing is necessary, and determine whether or not to perform additional shooting by using the space of the memory card secured by the information erasing, and then perform the image shooting step if necessary. If no moving or additional photographing is necessary, the step of moving to display or printing by an external computer device is performed.

With the above configuration, the most preferred embodiment which can be easily carried out by those skilled in the art with reference to the present invention will be described in detail with reference to the accompanying drawings.

2 is a block diagram of an electronic still video camera incorporating a bidirectional image reproduction and recording apparatus according to an embodiment of the present invention.

As shown in FIG. 2, the configuration of an electronic still video camera incorporating a bidirectional image reproduction and recording apparatus according to an embodiment of the present invention is a solid state imaging device that converts image light input from a subject into analog image data. (1), an analog / digital (A / D) converter 2 for converting analog image data into digital image data at a rate corresponding to the sampling rate of the solid state imaging device 1, and the analog / digital (A / D) a multiplexer (MUX) 3 for selecting one of the image data output from the converter 2 and the image data stored in the memory card 8, and the frame memory in the image data correction mode in the memory card 8 ( A three-state buffer 4 for controlling the input state of the input data of 8) and a frame memory for storing image data converted to digital by the analog / digital (A / D) converter 2 in units of frames. (5) and an aspect ratio of the oversampling filter 6 for oversampling the digital image data of the frame memory 5 by N times and the aspect ratio of each pixel of the image data output from the oversampling filter 6 as a square grid. Photographing with an interpolation circuit (7) for providing output image data having a clock ratio different from the clock ratio of the image data, and data modified in format by the oversampling filter (6) and the interpolation circuit (7). A memory card 8 for storing the result, a video processor 9 for outputting digitally converted image data which is an output of the analog / digital (A / D) converter 2 as video image data, and the video A digital / analog (A / D) converter 10 for converting the digital signal processed data output from the processor 9 into an analog signal and outputting the video signal, and to display the captured image data. An electronic viewfinder 11, a memory controller 12 for reading or erasing image data of a specific address from among image data in units of frames stored in the memory card 8, and a photo standard stored in the memory card 8; The video data converter 13 converts the image data into a video format for checking with the electronic viewfinder 11.

The operation of the electronic still video camera and its control method incorporating the bidirectional image reproduction and recording apparatus according to the embodiment of the present invention by the above configuration is as follows.

In the shooting mode, the solid state imaging device 1 converts image light input from a subject into analog image data.

The analog-to-digital (A / D) converter 2 converts the analog image data output from the solid-state imaging device 1 to a ratio corresponding to the sampling rate of the solid-state imaging device 1.

In the photographing mode, the digital image data is passed through the video processor 9 to output the video image data by the photographing / modifying mode selection control signal for controlling the multiplexer 3 and the tri-state buffer 4.

The digital-to-analog (D / A) converter 10 outputs the video signal via the image data signal-processed by the video processor 9.

The electronic viewfinder 11 also displays a video signal output from the digital / analog (D / A) converter 10.

The digital image data which has passed through the analog / digital (A / D) converter 2 is once stored in the frame memory 5 in a frame unit by another path.

The oversampling filter 6 oversamples the digital image data N times to meet the photographic standard.

The interpolation circuit 7 provides output image data having a clock ratio different from the clock ratio of the image data so that the aspect ratio of each pixel becomes a square lattice.

The image data output from the interpolation circuit 7 is sequentially stored in the memory card 8.

In the image data correction mode of the memory card 8, a control signal ACK is generated at a high level. In this case, the image data of a specific address stored in the memory card 8 in units of frames in the memory controller 12 is generated. Read out.

The video format converter 13 converts the image data of the photo standard stored in the memory card 8 into a video format and outputs it to the multiplexer 3.

The multiplexer 3 transfers the image data converted into the video format to the video processor 9.

The image data signal-processed by the video processor 9 is output to the electronic viewfinder 11 via a digital / analog (D / A) converter 10 and displayed.

The image data confirmed through the electronic viewfinder 11 can be determined by the user to delete the image data from the memory card 8 or to store the image data as it is.

3 is a conceptual diagram of position of frame image data in a memory card according to an embodiment of the present invention.

(A) of FIG. 3 is for assuming that image data of the second frame is captured with unwanted image data in the image data of N frames in the shooting mode.

FIG. 3B shows the image data recording position of the memory card 8 after recording N + 1 frames of data at the image data position of the memory card.

4 is a flowchart illustrating a recording / erasing / rewriting control method of an electronic still video camera incorporating a bidirectional image reproduction and recording apparatus according to an embodiment of the present invention.

As shown in FIG. 4, the operation of the recording / erasing / rewriting control method of the electronic still video camera is as follows.

When power is first applied, an operation of an electronic still video camera incorporating a bidirectional image reproduction and recording apparatus according to an embodiment of the present invention is performed.

When the operation is started, the solid-state imaging device 1 is used to convert the optical image into an electrical video signal during image capturing (step1).

The format of the still image aspect ratio is changed in order to convert the converted video signal to a standard such as a photograph (step 2).

The result of photographing the camera with the matrix-modified data is stored in the memory card 8 (step 3).

It is determined whether information update of the image data recorded in the memory card 8 is necessary (step 4).

When it is not necessary to update the information of the image data recorded on the memory card 8, display or printing by an external computer device is performed (step 5).

When the information update of the image data recorded in the memory card 8 is required, the information is read out from the memory card 8 (step 6).

The image data format, which is a standard such as a picture read out from the memory card 8, is changed to a video format (step 7).

The data changed to the video format is displayed through the electronic viewfinder 911 (step 8).

In this case, it is determined whether information erasing is necessary in the image of the first frame displayed by the electronic viewfinder 11, and when the information erasing is unnecessary, the process proceeds to determining whether information update of the second, third, ... is necessary. (step9).

If the information is to be erased, the information on the memory card is erased (step 10).

Use the memory card space secured by erasing the information to determine whether to take additional shots, and if further shots are required, go to the step of taking images, or if no additional shots are required, go to the step of displaying or printing by an external computer device. (Step11)

By using the space of the memory card 8 secured by the information erasing as described above, it is possible to select whether or not to take additional shots and rewrite the image data in the memory card 8.

As described above, in the embodiment of the present invention, the image data photographed by the electronic still video camera and recorded on the memory card is outputted by using the viewfinder as a display device, whereby the image data photographed incorrectly is reproduced. It is possible to provide an electronic still video camera with a built-in two-way image reproduction and recording device that has the effect of deleting an unwanted image, re-shooting it, and storing the image again in the deleted portion.

This effect of the invention can be used in the field of video cameras.

Claims (6)

A solid state imaging device for converting image light input from a subject into analog image data, an analog / digital converter for converting analog image data into digital image data at a rate corresponding to a sampling rate of the solid state imaging device, and the analog / digital A multiplier for selecting one of the image data output from the converter and the image data stored in the memory card, a three-state buffer for controlling the input state of the input data of the frame memory in the memory card in the image data correction mode, and the analog / A frame memory for storing image-converted image data, which is output of a digital converter, in units of frames, an oversampling filter for oversampling the digital image data of the frame memory by N times, and pixels of the image data output from the oversampling filter. Square each aspect ratio An interpolation circuit for providing output image data having a clock ratio that is different from the clock ratio of the image data, a memory card for storing the result of photographing with a camera having data modified by the oversampling filter and the interpolation circuit; And a processor for outputting image data converted into digital image data, which is an output of the analog / digital converter, and a digital signal for converting the digital signal processed data output from the video processor into an analog signal and outputting the video signal as a video signal. And an analog converter, an electronic viewfinder capable of displaying captured image data, a memory controller for reading or erasing image data of a specific address from among image data in units of frames stored in the memory card, and a photo stored in the memory card. Image data of standard A built-in two-way video reproducing and recording apparatus which comprises a video format converter for converting the video format to verify the electronic still video camera as a viewfinder. 2. The electronic still video camera with a built-in bidirectional image reproduction and recording apparatus according to claim 1, wherein the memory card erases frame images with unwanted image data and rewrites frames with new image data. The electronic still video camera with a built-in bidirectional image reproduction and recording apparatus according to claim 1, wherein the digital-to-analog converter can be applied to a VCR or the like by outputting a video signal. The electronic still video camera with a built-in bidirectional image reproduction and recording apparatus according to claim 1, wherein said electronic viewfinder displays image data in a memory card in image data correction mode. Converting an optical image into an electric video signal when capturing an image using a solid state imaging device, changing a format of a still aspect ratio to convert to a specification such as a photograph, and photographing with a format-modified data Storing the results on a memory card, determining whether information update of image data recorded on the memory card is necessary, and displaying the image data on the memory card by an external computer device when updating the information of image data recorded on the memory card is unnecessary. Or printing information, reading information from the memory card when information on the image data recorded on the memory card is required, and image data format conforming to standards such as photos read from the memory card. Format change, and the data converted to the video format through the electronic viewfinder Determining whether information erasing is necessary in the image of the frame displayed by the electronic viewfinder; erasing information on the memory card when information erasing is necessary; and memory secured by information erasing. Determining whether or not additional shooting is required by using the space of the card, if the additional shooting is required to move to the image shooting step, or if the additional shooting is not necessary to move to the step of displaying or printing by an external computer device Control method of electronic still video camera with built-in interactive image reproduction and recording device 6. The information update method according to claim 5, wherein when information erasing is unnecessary in the image of the first frame in determining whether information erasing is necessary in the image of the frame displayed by the electronic viewfinder. Control method of an electronic still video camera with a built-in two-way image reproduction and recording device, characterized in that it determines whether