JPH0564910B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an image file device, and more particularly to an image file creation and display device for compressing and recording image data.

[Conventional technology]

In recent years, with the spread of new media such as videotechs and captain systems and personal computers, many products that are not stocked in stores have images stored in data files.
Search this while looking at the display device,
In the case of products such as eyeglasses, devices are being put into practical use that can display a composite display of the searched product and the user's face to see whether the product suits the user. These devices must be low-cost and able to quickly handle huge numbers of image data files, but large-capacity data recording/playback devices (hard disks, optical disks, etc.) that can be accessed at high speed are extremely expensive. It becomes something. Therefore, conventionally, this type of equipment
Image data compression technology using DCPM (e.g. J/
B/O'Neal: “Predictive quantizing
systemem (differential pulse code
modulation) for the transmission of
television signals;． Bell Syst.Tech, J..
vol. 45, pp. 689-721 (May-June 1966)) and image data compression technology using two-layer block encoding (e.g. "Two-layer encoding method suitable for image databases")
TEBS100-9), Technical Report of the Television Society, published on December 13, 1980, was used. The DPCM method predicts the current value from the pixel value that has already been encoded, and encodes the error from that value.The two-layer block encoding method uses reduced image data for indexing and a normal-sized image. This is a method of encoding such that the file structure is divided into two types of data: data (intra-block two-dimensional predictive encoding) that complements the reduced image data to be obtained.

[Problem that the invention seeks to solve]

Conventional image file creation and display devices using the above-mentioned image data compression technology also file data on background parts that do not need to be filed. Although it has a data compression effect, it is a data compression method for images such as product images where the background part and the file target area are clearly distinguished (the file target area occupies about 1/2 to 1/10 of the entire screen). uses a wasteful compression method, so
The disadvantages are that the amount of files that can be handled is limited, and that expensive large-capacity recording media and large-capacity recording/playback devices must be used.

[Means for solving problems]

The image file creation device of the present invention includes a photographing device that outputs an image signal, and a file target image that is created by binarizing the output image signal or by converting the photographed image into a file object according to positional information input by a person. a key signal generating means for generating a key signal for identifying the image signal and the background; a key signal encoding means for highly efficient encoding the key signal to create key data; and a file receiving the image signal and the key signal. file object data creation means for outputting image data of only the object; a storage device; interface means for appropriately switching between the key data and the image data of only the file object and outputting write data to the storage device; The control means controls the interface means and causes the key data and the image data of only the file object to be recorded in the storage device as write data.

Further, the image file display device of the present invention can display data from a storage device that stores written data consisting of key data in which a key signal for identifying a photographed image as a file object and a background is encoded, and image data of the file object. interface means for separating and outputting written data into read key data and image data of a file object, and controlling the interface means to read the written data reproduced from a storage device and output the key data and file object image data. a key data decoding means for decoding the encoded key data separated and output by the interface means to output a key signal; and a key for temporarily holding the key signal. a memory, an image memory for temporarily holding image data of a file object, and a memory write control means for writing a key signal in the key memory and controlling writing of image data in the image memory by referring to the written key signal. , a photographing device that outputs an image signal, a sync separation circuit that separates a sync signal from the output image signal, and a sync signal that is temporarily held in a key memory and an image memory, respectively, in synchronization with the sync signal from the sync separation circuit. a memory read control means for reading out key data and image data, and a D/A converter for converting the read image data into an image signal and outputting an image signal.
A converter, a synthesizing means for synthesizing the D/A converted image signal and the image signal from the photographing device with reference to the key signal read out by the memory reading control means, and outputting a synthesized image signal; It has a monitor TV that displays the composite image signal on the screen.

Therefore, since a file representing an image is created and displayed using image data excluding the background and key data, the data compression rate becomes extremely high.

〔Example〕

Next, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram showing an embodiment of an image file creation device of the present invention.

This embodiment includes a TV camera 2 that photographs a product 1 (a netsukuresu as an example in the drawing) that is placed on a background object and that is to be input into a product file and outputs an image signal, and a TV camera 2 that outputs an image signal by inputting the image signal. ，
A converter 31 converts the three analog color signals of G and B into three analog color signals, and a comparator 3 compares the level of each of the three analog color signals of R, G, and B with the background color setting value.
A discriminator 35 compares three analog color signals of 2, 33, 34, R, G, and B with a set value, determines whether it is a background or a file target area, and outputs a 1-bit digital key signal. A key signal generation circuit 3, a run length encoder 5 which inputs and encodes a key signal, a clock generation circuit 41 which outputs a clock signal, and a clock gate 4 which controls the transmission of this clock signal by the key signal.
2. A/D converter 43 that converts the input image signal into a digital signal using the clock signal output from the clock gate 42; and the clock gate 4.
a file object data creation circuit 4 consisting of a DPCM encoding circuit 44 which outputs file image data compressed by DPCM from the output of the A/D converter 43 in response to a clock signal output from the CPU 7; and hard disk device 8,
Under the control of the CPU 7, first the key data from the run-length encoding circuit 5 is written to the hard disk device 8 together with the file identification code, and then the file image data from the file object data creation circuit 4 is written to the hard disk device 8. It consists of an interface circuit 6.

Since such a key generation circuit 3 has been conventionally used in broadcasting station studio equipment, it is not necessarily 31.
35 may be replaced with other conventionally used circuits. Here, the background color setting value is a hardware that performs interactive settings in which a person inputs the position of the background part using a mouse while monitoring the captured image, and the color of that part becomes the background color setting value. is also possible. Alternatively, the key signal may be generated by inputting the outline of the product from a tablet or the like while looking at a monitor, without using a circuit that automatically generates the key signal. Since the key signal obtained in this way is binary serial data, it is highly efficient run-length encoded by a run-length encoder 5 used in facsimile machines, etc., and then stored as key data on a disk. It is output to the interface circuit 6.

On the other hand, the opening and closing of the clock gate 42 of the file object data creation circuit 4 is controlled by the key signal from the key signal generation circuit 3, and the clock signal of the clock generation circuit 41 is stopped in the background part by the key signal. The A/D is processed by the clock signal processed in this way.
A converter 43 converts the input image signal into a digital signal. As a result, digital data is obtained in which only the file object portion (non-background portion) is extracted from the input image signal.

In this example, this digital data is
The data is further compressed by the DPCM encoding circuit 44, but in the case of a product image such as a net dress, the DPCM encoding circuit 44 is not necessarily necessary because just discarding the background data will result in considerable data compression. The image data of only the file object portion obtained as described above is sent to the disk interface circuit 6 in the same way as the previous key data. In disk interface circuit 6
Under the control of the CPU 7, first the key data from the run-length encoding circuit 5 is written to the hard disk device 8, and then the image data of only the file object part from the file object data creation circuit 4 is written to the hard disk device 8. It's crowded. At this time, a file identification code and the like are also added. These processes can be easily realized using conventional disk peripheral circuits.
Since the writing speed of a hard disk device 8 cannot follow the input image signal, a buffer memory is provided in the interface circuit 6, but if a device capable of high-speed writing such as a digital VTR is used, a buffer memory is not necessarily required.

By doing the above, for example, when handling data of 500 x 500 pixels and 8 bits depth (2M bits),
With normal DPCM, a compression rate of only 1/2 to 1/3 can be obtained, but according to this embodiment, the area of the file target area is 1/5 of the whole, and the compression rate due to run-length encoding is 1/3. 7, even without using DPCM (2
×10 ⁶ ×1/5＋500×500×1/7)／(2× ¹⁰⁶ )≒
A compression ratio of 0.218 is obtained.

FIG. 2 is a block diagram showing an embodiment of the image file display device of the present invention.

In this embodiment, a hard disk device 11 for storing key data and image data, a CPU 14, and a CPU
14, an interface circuit 12 separates and outputs data from the hard disk device 11 into key data and image data; and a key data decode circuit 13, which converts the key data into a key signal.
, an image data decoding circuit 15 that decodes DPCM encoded image data, a TV camera 22 that photographs a person 21 and outputs a person image signal of an NTSC analog signal, and a synchronization circuit that extracts a synchronization signal from the person image signal. Separation circuit 23 and synchronous separation circuit 2
A memory read control circuit 24 generates and outputs a clock signal synchronized with the synchronization signal from the key data decoding circuit 13, a key memory 18 temporarily stores the key signal from the key data decoding circuit 13, and an image data decoding circuit 15. An image memory 16 for temporary storage, a memory write control circuit 17 that controls writing to the key memory 18 and the image memory 16, and a D/A that converts the output from the image memory 16 from D/A.
It has a converter 19, a synthesis circuit 20 that synthesizes the output of the D/A converter 19 and the output of the TV camera 22 using the output of the key memory 18, and a monitor TV 25 that displays the output of the synthesis circuit 20 on a screen. . The disk interface circuit 12 is connected to the CPU 14.
The target file is searched from the hard disk device 11 under the control of
Key data decoding circuit 1 as playback key data
Send to 3. The key data decoding circuit 13 decodes the run-length encoded playback key data, converts it into normal 1-bit serial data, and outputs it as a playback key signal. The reproduced key signals are sequentially written into the key memory 18 by the memory write control circuit 17. When the key signal writing for one screen is completed, the disk interface circuit 12 reads the image data from the hard disk device 11 under the control of the CPU 14, and this image data is sent to the image data decoding circuit 1.
5, the DPCM encoded data is converted into normal digital data and output as reproduced image data of the target portion of the file. This image data decoding circuit 15 is unnecessary if the image data is not DPCM encoded when creating the file. The reproduced image data of this file target portion is written to the image memory 16 in units of one sample under the control of the memory write control circuit 17. Here, the memory write control circuit 17 gives the same address to the key memory 18 and the image memory 16, reads the key signal from the key memory 18, and reads the key signal from the image memory 16.
Control is performed so that the image data from the image data decoding circuit 15 is sequentially written one sample at a time, but when the read key signal has a value indicating the background part, no image data is written. ing. In this way, the input image is reproduced on the image memory 16. Note that reading from the hard disk device 11 is performed using a handshake method in which each time one piece of data is written to the image memory 16, the next data is read, but in order to ensure that the data flows without waste, the disk interface It is sufficient to have FIFO memory in circuit 2.

The parts described above are the features of this embodiment, in which the contents of the image memory 16 are read out using the conventional method, converted to D/A by the D/A converter 19, and then monitored.
You can view the contents of the file by displaying it on TV25. However, in this embodiment, the key signals written in the key memory 18 are used to display the person and the product to be filed in a composite manner.
Person 21 was photographed by TV camera 22 and NTSC
The analog signal is used as an image signal by the synchronization separation circuit 23
and is sent to the synthesis circuit 20. Synchronous separation circuit 23
Then, the synchronization signal from the image signal is extracted, and the memory readout control circuit 24 generates a readout clock signal synchronized with the extracted synchronization signal, and the key signal is output from the key memory 18 using this clock signal. , the image signals are read out simultaneously from the image memory 16. The read key signal remains as it is, and the image signal is converted into an analog signal by the D/A converter 19 and sent to the synthesis circuit 2.
Sent to 0. The synthesis circuit 20 is an analog switch, which identifies the background and the file object based on the key signal read from the key memory 18, and converts the signal from the TV camera 22 in the background part and D/A converts the file object part. The signals from the image memory 16 are selected and outputted through the device 19. When the signal thus obtained is displayed on the monitor TV 25, the person and the product image are displayed in a composite manner.

〔Effect of the invention〕

As explained above, the present invention performs high-efficiency encoding such as run-length encoding on a key signal that identifies a background portion or a file object portion, and combines image data excluding the background portion with the encoded key signal. By creating a file that represents the input image, a very high data compression rate can be obtained when creating product files such as eyeglass frames and net dress, making it possible to create equipment that handles large-capacity product files at low cost. There is an effect that can be done.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an embodiment of an image file creation device of the present invention, and FIG. 2 is a block diagram showing an embodiment of an image file display device. 1... Product, 2... TV camera, 3... Key signal generation circuit, 31... Converter, 32, 33, 34
... Comparator, 35 ... Discriminator, 4 ... File object data creation circuit, 41 ... Clock generation circuit, 42 ... Clock gate, 43 ... A/D converter, 44 ... DPCM encoding circuit, 5... Run length encoding circuit, 6, 12... Disk interface circuit, 7, 14... CPU, 8, 1
DESCRIPTION OF SYMBOLS 1... Hard disk device, 13... Key data decoding circuit, 15... Image data decoding circuit, 16... Image memory, 17... Memory write control circuit, 18... Key memory, 19... D/A
Converter, 20... Synthesis circuit, 21... Person, 22
...TV camera, 23...Synchronization separation circuit, 24...
...Memory read control circuit, 25...Monitor
TV.

Claims (1)

[Claims] 1. A key that generates a key signal that binarizes an output image signal or identifies a captured image into a file object and a background based on position information input by a person. a signal generating means; a key signal encoding means for generating key data by highly efficient encoding of the key signal; and a file object for receiving the image signal and the key signal and outputting image data of only the file object. a data creation means; a storage device; an interface means for appropriately switching between the key data and the image data of only the file object and outputting the write data to the storage device; An image file creation device comprising a control means for recording image data of only a file object in a storage device as write data. 2. A patent claim in which a run-length encoding circuit or a boundary differential encoding circuit is used as the key signal encoding means, and a DPCM equalization circuit or block encoding means using two-dimensional prediction is included in the file object data creation means. The image file creation device according to item 1. 3 Read the written data from the storage device that stores the written data consisting of the key data encoded with the key signal that identifies the photographed image as the file object and the background, and the image data of the file object, and write the key data and the file. interface means for separating and outputting the image data of the object; and controlling the interface means to read the written data reproduced from the storage device and output the key data and the image data of the file object separately. a key data decoding means for decoding encoded key data separated and outputted by the interface means and outputting a key signal; a key memory for temporarily holding the key signal; and image data of the file object. an image memory for temporarily holding the image data; a memory write control means for writing a key signal in the key memory and controlling writing of image data in the image memory by referring to the written key signal; and a photographing device for outputting the image signal. a synchronous separation circuit that separates a synchronous signal from the output image signal; and a synchronous separation circuit that reads the key data and image data temporarily held in the key memory and the image memory, respectively, in synchronization with the synchronous signal from the synchronous separation circuit. a memory read control means for outputting the image data; a synthesis means for synthesizing the read image data and an image signal from the photographing device with reference to the key signal read by the memory read control means and outputting a synthesized image signal; An image file display device having a monitor TV that displays a composite image signal on a screen. 4. When the image data of the file object output from the interface means is encoded,
4. The image file display device according to claim 3, further comprising image data decoding means for decoding file object image data and outputting the decoded file object image data to an image memory.