JPH05316466A - Image recording and reproducing device - Google Patents

Abstract

PURPOSE:To improve the security of image data by making it impossible to display image data excepting for that of an object. CONSTITUTION:At the time of recording image data, a host computer 1 compression-encodes image data fetched into a memory 4 by a compressor 6 and respectively records AC component data in the optical magnetic disk of an optical magnetic disk recording/reproducing device 7 and DC component data in the optical card of an optical card reproducing/recording device 8. At the time of reproducing, the AC/DC component data are put together, decoded by an expandor 9 and developed at a frame buffer 10 to display an original image on CRT 12. At the time of retrieving, after only DC component data is displayed on CRT 12 with a multi-screen as a reduced image to select data of the object, it is put together with corresponding AC component data and decoded to display the original image on CRT 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image recording / reproducing apparatus, and more particularly to image recording / reproducing for recording / reproducing image data on / from an information recording / reproducing medium capable of recording a plurality of image data, or searching recorded image data. Regarding the device.

[0002]

2. Description of the Related Art In recent years, an apparatus for recording / reproducing a large amount of data such as image data has been developed with the increase in density and capacity of information recording / reproducing media. For example, JP-A-62-1
Japanese Patent Laid-Open No. 80835 and Japanese Patent Laid-Open No. 2-193476 disclose an image recording / reproducing apparatus for recording / reproducing a large amount of image data. In such an apparatus, image data is recorded on an information recording / reproducing medium such as a hard disk, an optical disc, an optical card, and the like, and is applied to various systems such as a medical image examination system.

By the way, in an apparatus for recording / reproducing a large amount of image data, in order to extract necessary image data from a plurality of image data recorded on various information recording / reproducing media, a method of designating a file name or a search method is used. , A method of sequentially displaying the stored images on a display or the like, or storing the original image data and its compressed data on the same information recording / reproducing medium, and displaying the compressed data on a multi-screen and displaying the reduced image on the screen. A method of selecting an image is generally used.

However, the conventional apparatus for searching image data as described above has the following problems when searching for image data.

In the method of searching the image data by the file name, it is necessary to associate the file name with the image data so that the image can be imaged from the file name, but there is a limit in expressing the content of the image by the file name. is there. Therefore, in many cases, the image retrieved and displayed by the file name from the information recording / reproducing medium storing a plurality of image data is different from the required image, and the retrieval cannot be performed efficiently. In particular,
Unlike document data, image data has a very large capacity,
Since it takes a very long time to display the information recording / reproducing medium after it is taken out from the information recording / reproducing medium, the retrieval efficiency is extremely deteriorated when the unnecessary data is taken in and displayed. At the same time, there is a problem that the security of the recorded image data is deteriorated because incorrect data can be easily displayed.

On the other hand, in a method of retrieving necessary image data while sequentially displaying images recorded on the information recording / reproducing medium on an image display device such as a display, the image data is sequentially taken out from the information recording / reproducing medium and displayed. Since it takes a very long time, there is a problem that it cannot cope with the case where a large amount of image data is stored. Also in this case, unnecessary image data is sequentially displayed, so that the security of the image data deteriorates.

In addition, in a large number of image data to be recorded, compressed data is created for all original image data, both the original image data and the compressed image data are stored in the same information recording / reproducing medium, and the compressed data is multi-coded. In the method of displaying and displaying the necessary original image data on the screen, if there are thousands or tens of thousands of stored data, it is necessary to configure a hierarchical directory etc. for these many data and search. There is a problem in that the multi-screen display of compressed data for is complicated, the search procedure is complicated and the search efficiency is poor, and incorrect data is displayed, which leads to a search error.

Further, when the information recording / reproducing medium is an optical card, the data reading speed is slower than that of the hard disk, so that it takes about 3 times to read one sheet of image data.
It takes minutes, and displaying incorrect data significantly increases the search time.

[0009]

As described above, in the conventional image recording / reproducing apparatus, it is necessary to display even unnecessary data at the time of search, or there is a risk of a search error in which incorrect data is displayed. There is a problem that the security of image data deteriorates.

For example, when applied to a medical image examination system, the image data of various patients are stored in the information recording / reproducing medium, and the above-mentioned retrieval error is caused by the image data of other patients other than the retrieval purpose. However, there is a problem that it induces the retrieval and display of the product, which may cause a misdiagnosis, and may lead to privacy invasion when the patient views incorrect data.

The present invention has been made in view of these circumstances, and provides an image recording / reproducing apparatus capable of making image data other than the intended one undisplayable and improving the security of the image data. The purpose is to do.

[0012]

An image recording / reproducing apparatus according to the present invention comprises first information recording / reproducing means for recording / reproducing information on / from a first information recording / reproducing medium and information on a second information recording / reproducing medium. Second information recording / reproducing means for recording / reproducing
Original image data is separately recorded on the first and second information recording / reproducing media, and the original image is displayed by combining the data recorded on the first and second information recording / reproducing media during reproduction. And a control means for controlling recording / reproduction.

[0013]

The control means includes first information recording / reproducing means for recording / reproducing information on / from the first information recording / reproducing medium, and second information recording / reproducing for recording / reproducing information on the second information recording / reproducing medium. Control recording / playback of the means. When recording image data, the data of the original image is recorded separately on the first and second information recording / reproducing media. During playback, the first and second
The original image is displayed by combining the data recorded on the information recording / reproducing medium.

[0014]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 3 relate to an embodiment of the present invention.
2 is a block diagram showing a configuration of an image recording / reproducing apparatus, FIG. 2 is a flowchart showing an operation at the time of recording image data, and FIG. 3 is a flowchart showing an operation at the time of searching and displaying image data.

The image recording / reproducing apparatus of this embodiment is controlled by the host computer 1 as a control means.
In FIG. 1, the control signal is shown by a broken line, and the flow of image data is shown by a solid line.

A scanner 2 for taking in image data recorded on a medium such as an X-ray film and a photograph, and a CC as an image signal source for picking up a subject image to obtain image data.
A D camera 3 and the like are provided, and image data is input from these. The scanner 2 is connected to a memory 4 for storing image data, and the CCD camera 3 is also connected to the memory 4 via the A / D section 5 in the same manner. Image data captured by the scanner 2 as digital data, or Image data captured by the CCD camera 3 and converted into digital data by the A / D unit 5 is stored in the memory 4.

The memory 4 is connected to a compressor 6 for compressing image data, and the stored image data is compression-encoded by orthogonal transform such as discrete cosine transform (DCT). An optical card recording / reproducing device 8 as a first information recording / reproducing device and a magneto-optical disk recording / reproducing device 7 as a second information recording / reproducing device are connected to the compressor 6 for compression encoding. The alternating current component (AC component data) of the image data thus recorded is recorded in the magneto-optical disk recording / reproducing device 7, and the direct current component (DC component data) is recorded in the optical card recording / reproducing device 8. The magneto-optical disk recording / reproducing device 7 and the optical card recording / reproducing device 8 are connected to an expander 9,
AC component, D, which is compression encoded and recorded in each
The image data of the C component is expanded in the frame buffer 10 by the expander 9. The image data in the frame buffer 10 is converted into an analog signal by the D / A unit 11, and the image is displayed on the CRT 12.

The optical card recording / reproducing device 8 is also connected to the frame buffer 10, and the image data of the DC component recorded in the optical card recording / reproducing device 8 is sent to the frame buffer 10 to be D / A. CRT1 via section 11
2 can be displayed as a reduced image.

Next, the operation of this embodiment will be described with reference to the flow charts of FIGS. Each unit of the image recording / reproducing apparatus of this embodiment operates according to a control signal (broken line in FIG. 1) from the host computer 1. First,
When recording image data, the data recording is performed according to the flowchart of FIG. Step S1 (hereinafter,
(Steps are omitted), it is determined whether the image signal is a digital signal. If the image signal is an analog signal, the process proceeds to S2 and A / D
After being converted into a digital signal by the unit 5, the image data is loaded into the memory 4 in S3. If the image signal is a digital signal, the process directly proceeds to S3 and the image data is taken into the memory 4.

That is, when recording image data recorded on a film such as an X-ray photograph, the scanner 2
Then, the line scan is optically performed with high resolution to convert it into digital data and record it in the memory 4. Further, when recording an image picked up by the CCD camera 3 or the 8 mm video camera simply, the output of the CCD camera 3 or the 8 mm video camera is a video signal (analog signal). Need to be converted into a digital signal by the A / D section 5, and the signal converted into the digital data is stored in the memory 4
To record.

The image data taken in the memory 4 is S
At 4, the data is compressed and encoded by the compressor 6. For example, one screen of data input to the compressor 6 is divided into a plurality of small blocks (8 × 8 64 pixels), and then compression-encoded for each block. As the compression encoding, for example, orthogonal transform such as discrete cosine transform (DCT) is used. When the image data is compressed and encoded by DCT, the DC component (D
C component data) and an AC component (AC component data) that is correction data used for decoding together with the DC component data.

Then, in step S5, the DC component data is recorded on the optical card by the optical card reproducing / recording device 8, and the AC component data is recorded.
The component data is recorded on the magneto-optical disk by the magneto-optical disk recording / reproducing device 7. At this time, the file name of the AC component data and the file name of the DC component data corresponding to the file name are the same. In this way, the compression-coded image data is divided into AC component data and DC component data and recorded on different recording media.

As described above, the image data to be managed by the host computer 1 is recorded on the magneto-optical disk and the optical card. For example, when used as a medical image data filing system, one image is recorded for each patient. When used in an image data filing system that allocates optical cards or manages images such as picture books, one optical card is used for each volume to manage image data. Since the capacity of the DC component data is several tenths of the original image (1/64 when compression-encoded for each block of 8 × 8 64-pixels), several hundreds of them can be stored in the optical card. It is possible to record the image data of the DC component of.

A floppy disk, an IC card or the like may be used instead of the optical card, and a hard disk or the like may be used instead of the magneto-optical disk.

Next, when retrieving a plurality of image data stored in a plurality of optical cards and a magneto-optical disk, the retrieval is performed according to the flowchart of FIG. First, S11
Then, select the optical card that stores the image data to be searched. As described above, for example, when used as a medical image data filing system, one card is assigned to one patient, and when used in an image data filing system that manages images such as picture books, Since the image data is stored by a method such as using one optical card for each winding, it is possible to easily select the optical card in which the required image is stored. For example, when it is desired to display the image data of a patient to be diagnosed, the optical card of the patient is replaced with the optical card recording / reproducing device 8
You can insert it in.

In step S11, an optical card on which the DC component data of the target image data is recorded is selected, and the optical card is inserted into the optical card recording / reproducing device 8. Then, in step S12, the optical card recording / reproducing device 8 detects the optical card. The plurality of DC component data recorded in 1 is read, and the DC component data read in S13 is expanded in the frame buffer 10. And S14
Then, the plurality of DC component data expanded in the frame buffer 10 are D / A converted by the D / A unit 11, and the plurality of reduced images are output to the CRT 12 as a multi-screen in S15. Here, since the DC component data is the average value data of each block obtained by dividing the data for one screen, the DC component data can be a simple image expressing the characteristics of the original image only by directly expanding it in the frame buffer 10. Further, since its capacity is one tenth of the original image (1/64 when compressed and encoded for each 8 × 8 64 pixel block), 50 to 60 reduced images can be simultaneously multi-displayed on the CRT 12. Can be displayed on screen. Also,
Reading data from an optical card can be performed very quickly because one DC component data file is small.

Then, in S16, when the necessary image data is selected from the multi-screen displayed on the CRT 12, the host computer 1 selects the selected image in S17 based on the file name of the DC component data. The AC component data recorded on the disc is searched. At this time, the correspondence information between the DC component data and the AC component data is
For example, it is stored in a RAM or the like, and the corresponding AC component data is extracted based on this. Therefore, a person who uses the system can search for the target image data without being conscious of the file name, only by selecting the reduced image displayed on the multi-screen. In addition, the file name is also CRT with the reduced image.
It is also possible to display the image on the screen 12 and select the file name of the desired image data or input it from the keyboard or the like to select the image.

After searching the AC component data corresponding to the selected reduced image from the magneto-optical disk recording / reproducing device 7,
In S18, the decompressor 9 decodes the target image data from the AC component data and the DC component data recorded in the optical card, and in S19, the decoded original image data is expanded in the frame buffer 10. Then, the image data expanded in the frame buffer 10 in S20 is D / A converted by the D / A unit 11, and displayed on the CRT 12 in S21.

As described above, first, the reduced image by the DC component data is displayed on the multi-screen, the target image data is selected from this multi-screen, and the selected DC component data and the corresponding AC component data are selected. By decoding and displaying the data of the original image, the target image data is searched and displayed. Here, without the DC component data recorded on the optical card and the AC component data recorded on the magneto-optical disk corresponding thereto, the image data cannot be decoded and the image cannot be displayed on the CRT 12. ing.

As described above, according to this embodiment, when image data is recorded, the data is compressed by orthogonal transformation, the DC component data is recorded on the optical card, and the AC component data is recorded on the magneto-optical disk. , By managing the optical card storing the DC component data separately for each image type, the optical card is first selected, and then the DC component data recorded on the optical card is selected to be stored on the magneto-optical disk. It is possible to easily and accurately search for a plurality of existing image data. That is, since the DC component data is divided for each image type and recorded on an optical card having a relatively small capacity, the optical card itself has an index function, and for example, it can be searched from tens of thousands of image data. , It is not necessary to search for the target image data from the complicated directory structure, and the search can be performed easily. For example, when used as a medical image data filing system, data can be recorded and managed on one optical card for each patient, so that search errors can be reduced.

When image data is recorded on an optical card, for example, if the image data for one sheet is 750 kbytes, only two or three sheets can be recorded conventionally, but D
Since only the C component data is recorded, about 200
Image data for one sheet can be recorded on one optical card, search,
Easy to manage.

Further, the AC component data of the image data stored in the magneto-optical disk shared by the system cannot be decoded without the DC component data recorded in the optical card and cannot be displayed on the CRT. The security management of image data can be easily performed with an optical card. That is, the original component image data cannot be decoded unless the AC component data and the DC component data that are separated and recorded on different recording media are combined. Can be prevented and the security of image data can be improved.

[0033]

As described above, according to the present invention, it is possible to make image data other than the intended one undisplayable and to improve the security of the image data.

[Brief description of drawings]

1 to 3 relate to an embodiment of the present invention, and FIG. 1 is a block diagram showing a configuration of an image recording / reproducing apparatus.

FIG. 2 is a flowchart showing an operation when recording image data.

FIG. 3 is a flowchart showing an operation when searching for and displaying image data.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Host computer 4 ... Memory 6 ... Compressor 7 ... Magneto-optical disk recording / reproducing apparatus 8 ... Optical card reproducing / recording apparatus 9 ... Expander 10 ... Frame buffer 12 ... CRT

Claims (1)

[Claims] 1. Information is recorded / recorded on a first information recording / reproducing medium.
First information recording / reproducing means for reproducing, second information recording / reproducing means for recording / reproducing information on / from a second information recording / reproducing medium, and original image data on the first and second information recording / reproducing media Control means for separately recording and reproducing, and controlling the recording / reproduction so as to display the original image by combining the data recorded on the first and second information recording / reproducing media respectively. An image recording / reproducing apparatus characterized by.