KR100496734B1 - Method for delivering data using network - Google Patents

Abstract

 The present invention relates to a method for transmitting image data through a network, and more particularly, it is possible to transmit image data by using a peer-to-peer (P2P) method and to store, manage, and retrieve the transmitted image. It is about how.

In the method for transmitting image data according to the present invention for transmitting the image in the transmission center terminal combined with the IP relay server and the reception center terminal over the network, receiving the reception center IP address from the IP relay server, After transmitting the folder information request signal to the reception center terminal, the folder information can be received from the reception center terminal. Then, the folder information is displayed on the display device of the transmission center terminal, and after receiving the location information for storing the image file to be transmitted from the input device of the terminal, the transmission file including the location information and the image information is transmitted to the reception center terminal. can do. In addition, the receiving center terminal is characterized in that to extract the location information and store the image file in a location corresponding to the storage location information.

Description

How to send an image over the network {METHOD FOR DELIVERING DATA USING NETWORK}

The present invention relates to an image transmission method through a network, and more particularly, to transmit image data by a peer-to-peer (P2P) method, and to store, manage, and retrieve the transmitted image. Of course, in particular, it is possible to transmit image data from a plurality of terminals to a predetermined terminal. As is well known, newspapers frequently receive photographic images along with terminals from a plurality of remote photo reporters via a terminal and a network. However, such a photo article and a photo image are transmitted in the form of an attachment in an e-mail. Furthermore, in the case of sending a plurality of photographs, there is an inconvenience of manually compressing the photo file and then transmitting it manually.

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In addition, the photo-transmission method of the server-client structure has problems such as communication efficiency degradation and server overload.

In particular, a high cost is required to construct a dedicated line for high-speed image transmission in real time, and even if a dedicated line is established, a large amount of time is consumed in transmitting a large amount of images.

Accordingly, an object of the present invention is to provide a method for transmitting, managing, and retrieving an image using a peer-to-peer (P2P) method.

In addition, an object of the present invention is to provide a method for preventing the deterioration of the image quality while increasing the transmission efficiency by using a compression algorithm with a low loss or low loss rate.

It is also an object of the present invention to provide a method in which a plurality of image files can be compressed and transmitted into a single file through a peer-to-peer (P2P) method between a receiving center terminal and a transmitting center terminal in a transmitting center terminal.

It is also an object of the present invention to provide a method in which a transmitting center terminal can store image data in a designated folder of a storage device in the receiving center terminal.

It is also an object of the present invention to provide a method for storing image data in a category designated in a database coupled to a transmission center terminal.

It is also an object of the present invention to provide a method of adding caption information to an image file and transmitting the same as one file.

Another object of the present invention is to provide a method for searching an image file using the caption information.

In addition, an object of the present invention is to provide a method for transmitting and receiving images while maintaining the network connection method by the existing floating IP method through a transmission and reception program using the floating IP.

According to a first aspect of the present invention for achieving the above objects, in a method for transmitting an image in a transmission center terminal combined with an IP relay server and a reception center terminal through a network, a receiving center IP address is received from an IP relay server. Receiving, transmitting a folder information request signal to the receiving center terminal, receiving folder information from the receiving center terminal, displaying the folder information on a display device of the transmitting center terminal, inputting the terminal Receiving location information for storing an image file to be transmitted from a device; and transmitting a transmission file including the location information and image information to the receiving center terminal, wherein the receiving center terminal extracts the location information. The storage location of the image file The image transmission method over a network that can be stored in corresponding to the beam position and a recording medium with a program to perform these methods are listed, is provided.

According to another embodiment of the present invention, in a method for transmitting an image in a reception center terminal combined with an IP relay server and a transmission center terminal through a network, transmitting an IP address corresponding to the reception center terminal to an IP relay server. Receiving a folder information request signal from the transmitting center terminal, extracting the folder information, transmitting the folder information to the transmitting center terminal, location information for storing an image file from the transmitting center terminal, and Receiving a transmission file containing the image information including the image file by a predetermined method and the image transmission method and system over a network capable of storing the image file in a location corresponding to the location information and the method Number of programs that can run A recorded recording medium is provided.

Here, the folder information may be a directory list or a category list, and the image information may include caption information and image data.

In addition, the caption information may be composed of text, and the image data may be generated including a plurality of image files.

When a plurality of image files are included in the image data, a detailed transmission table may be generated according to the number of the image files.

In addition, the image data may be compressed by a wavelet method, and in the wavelet compression algorithm, the discrete wavelet transform may be performed about four times or less than six times.

The transmission file may be divided and transmitted in block units, and the block unit is preferably 4K bytes. Hereinafter, a preferred embodiment of an image transmission and output method through a network according to the present invention will be described with reference to the accompanying drawings. It will be described in more detail.

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1A is a diagram illustrating an image transmission system through a network according to an exemplary embodiment of the present invention.

Image transmission according to the present invention can be made directly between the transmission center terminal and the reception center terminal without going through the relay server by the P2P method.

1A, an image transmission system according to the present invention includes a transmission center terminal 110, an IP relay server 120, and a reception center terminal 130.

The transmission center terminal 110 refers to a terminal on the side of transmitting image data, and the reception center terminal 120 refers to a terminal on the side of receiving image data received from the transmission center terminal.

According to the image transmission method according to the present invention, the terminal may transmit and receive image data, but the terminal is divided into a transmission center terminal and a reception center terminal for the purpose of understanding the present invention. However, the reception center terminal may function as the transmission center terminal, and the transmission center terminal may perform the function of the reception center terminal.

The transmission center terminal 110 may include a mobile phone 112, a PD 114, a notebook 116, a desktop computer 118, and the like.

The reception center terminal 130 may also include a mobile phone 112, a PD 114, a notebook 116, a desktop computer 118, and the like.

In general, since the reception center terminal 130 receives images from the plurality of transmission center terminals 110 and has a capability of managing the images, the reception center terminal 130 is a computer. desirable.

Of course, if the performance of the mobile phone 112 or the PD 114 is improved by the development of the future technology, it is natural that the reception center terminal 130 may be configured as the mobile phone 112 or PD (114).

The IP relay server 120 performs a function of relaying IPs of the transmission center terminal 110 and the reception center terminal 130.

The IP relay server 120 may perform authentication on the reception center terminal 130 and extract and store the IP address of the reception center terminal 130 that has been authenticated.

Thereafter, when the transmission center terminal 110 accesses the IP relay server differently and designates the reception center terminal 130 to transmit the image data, the IP relay server 120 corresponds to the IP address corresponding to the reception center terminal 130. May be extracted and transmitted to the transmission center terminal 110.

That is, the transmission center terminal 110 may directly transmit an image file to the reception center terminal using the IP address of the reception center terminal 130.

1B is a diagram illustrating an image transmission system via a network according to another exemplary embodiment of the present invention.

Referring to FIG. 1B, the image transmission system according to the present invention includes a transmission center terminal 110, an IP relay server 120, and a reception center server 150.

That is, the apparatus of the reception center may be configured as a terminal as shown in FIG. 1A, and is composed of a reception center server 150 and a plurality of terminals 152, 154, and 156 coupled to the reception center server as shown in FIG. 1B. It can also be.

Hereinafter, the reception center server and the reception center terminal will be collectively referred to as a reception center terminal.

Other descriptions are the same as in FIG. 1A and will be omitted.

2 is a flowchart illustrating an image file transfer procedure according to an exemplary embodiment of the present invention.

According to the present invention, a transmission center terminal coupled via a network may transmit image data compressed by a predetermined compression scheme to a reception center terminal.

Hereinafter, an image file transfer procedure according to the present invention will be described with reference to FIG. 2.

In step 200, the reception center terminal accesses the IP relay server through the network. In step 205, the IP relay server performs an authentication procedure with respect to the reception center terminal. In general, the authentication procedure may be performed using an ID and a password.

Via the authentication procedure, in step 210, the IP relay server extracts an IP address corresponding to the reception center terminal and stores the extracted IP address.

In step 215, the transmission center terminal accesses the IP relay server through the network, and in step 220, the IP relay server performs an authentication procedure with respect to the transmission center terminal. The authentication procedure may be performed using an ID and a password as in step 210.

The image file sent in step 225 is designated via an input device coupled to the transmission center terminal. The designation of the image file can be made through a user interface provided by the present invention (see Fig. 3).

In step 230 a receiving center to which the image is to be transmitted is designated via an input device coupled to the transmitting center terminal. The designation of the reception center may also be made through the user interface provided by the present invention.

Then, in step 235, if the IP address corresponding to the reception center designated by the transmission center terminal is requested to the IP relay server, the IP relay server extracts the IP address corresponding to the reception center in step 237. In step 240, the extracted IP address is transmitted to the transmission center terminal.

For example, the process of steps 230 to 240 will be described below.

According to an embodiment of the present invention, if the transmission center terminal designates a 'national daily report', the IP relay server may extract an IP address corresponding to the 'national daily report' and transmit it to the transmission center terminal.

According to another embodiment of the invention, a reception center list corresponding to the transmission center terminal may be provided. That is, if the reception center set corresponding to the transmission center terminal is 'Kookmin Daily' and 'Dong-A Daily', the information on the list may be provided, and the transmission center may designate the reception center by clicking one of the lists. have.

Naturally, the method of designating a transmission center according to the present invention can be variously modified and changed without departing from the spirit of the present invention by those skilled in the art.

In step 245, the transmitting center terminal may request a directory list or a category list of the receiving center terminal using the IP address of the receiving center terminal received from the IP relay server.

In step 250, the transmitting center terminal transmits a directory list or category lease to the receiving center terminal in response to the request signal.

That is, the detailed location in the terminal of the receiving center where the image file to be transmitted from the transmitting center terminal is to be stored can be designated by referring to the directory structure or category structure of the transmitting center terminal.

The directory structure according to the present invention refers to a tree-like hierarchical structure, and is called a tree structure. That is, it refers to the folder structure in the window (see Fig. 8).

The category structure according to the present invention has the same hierarchical structure as the directory structure, but will be defined as referring to a tree structure when a database is constructed.

That is, a tree structure in which a database searchable by index is constructed is called a category structure (see FIG. 9).

In step 255, the transmitting center terminal designates a location to store the image file to be transmitted by referring to the received directory structure or category structure.

The transmission center terminal receiving the transmission command in step 260 generates a transmission file including the compressed image file and transmits the transmission file generated in step 265 to the reception center terminal.

The transfer file generation method is classified into an individual file generation method or a group file generation method, and the image file included in the transfer file is preferably compressed by the compression method according to the present invention.

That is, in step 220, the terminal of the transmission center compresses the image file by a predetermined method. Conventional JPEG compression technology is a lossy compression method, and through this lossy compression process, it inevitably degrades image clarity.

Accordingly, the present invention can maintain not only transmission efficiency but also image quality by using a lossless compression method according to the wavelet compression method (see FIGS. 6A and 6B).

It is preferable to use a TIFF file as a lossless compression method according to the present invention. TIFF is a standard file format widely used for scanning, storing, or exchanging black and white or halftone still images. The feature is that the attribute of the image data is defined as tag information. For this reason, in the case of the image file in the TIFF format, the application program can recognize the data format by reading the standardized tag information described in hundreds of bytes at the beginning of the image file. The tag portion is provided with a flag corresponding to various types of image data.

Of course, not only the TIFF file but also a JPEG, a BMP file, or any other existing image file can be transferred.

Furthermore, data can be transmitted and received efficiently without burdening the server by exchanging image data between the terminal of the transmission center and the terminal of the reception center according to the predetermined protocol according to the present invention without passing through the server.

Via the above steps, the schematic transmission procedure of the image transmission according to the present invention is completed.

3 is an initial screen of an image transmission program according to an exemplary embodiment of the present invention.

After the terminal is authenticated by the image relay server, the user interface as shown in FIG. 3 is displayed on the display device coupled to the terminal of the transmission center.

Hereinafter, an image designation procedure will be described with reference to a user interface screen according to an embodiment of the present invention with reference to FIG. 3.

The user interface screen according to the present invention may include a directory window 300, an image window 305, a caption window 310, a search window 315, and the like.

The screen is a screen displayed to the user when searching and specifying an image file designated in the transmission center terminal.

In the directory window 300, a folder structure of the transmission center terminal is displayed so that a user of the transmission center terminal can search for an image file stored in the transmission center terminal.

When a folder to search for an image file is designated in the directory window 300, an image file included in the folder is displayed through the search window 315.

That is, if any one of the image files displayed in the search box is designated, an image of the designated file is displayed through the image window 305, and caption information corresponding to the image file is displayed through the caption window 310. .

According to an embodiment of the present invention, the displayed image file may display a thumbnail, a file name, and caption information corresponding to the image file.

Not only the caption information corresponding to the image file may be referred to through the caption window 310, but the caption information corresponding to the image file may be modified and input through the caption window 310.

That is, when one file 320 of the plurality of image files displayed in the search box is selected, an image corresponding to the image file is displayed in the image window 305, and the caption information corresponding to the image file is captioned. It may be displayed in the window 310.

The caption information is text. When the user is a reporter, the caption information may be an article corresponding to the image file.

4A to 4B illustrate a method of generating an image file to be transmitted according to an exemplary embodiment of the present invention.

4A is a diagram illustrating an image file generation method for individual files according to an exemplary embodiment of the present invention.

The image file transmitted by the present invention may be compressed before transmission to increase the transmission efficiency. Hereinafter, an image file structure according to the present invention will be described with reference to FIG. 4A.

The general image file 400 comprises a header 404 and image data 406.

The header 404 includes details of the image file such as the type of image data, company information, and the like.

The image data 406 includes color information, size information, and the like for the image.

According to the present invention, since the header portion is composed of text, the compression efficiency is not great even if compressed. Therefore, the header portion composed of text is not compressed, and only the image data portion can be compressed.

The image data can be compressed by wavelet technology in accordance with the present invention.

In addition, the image file of the JPEG format of the image data is compressed by the compression method according to the present invention, has a size of about 1/3, TIFF files after compression by the wavelet compression method according to the present invention 1 Can be compressed to size / 10.

4B illustrates a method for generating a transmission image file for a group file according to an exemplary embodiment of the present invention.

According to the present invention, not only one image file can be transmitted individually, but also one group file corresponding to the plurality of image files can be generated, thereby allowing the plurality of image files to be transmitted simultaneously.

Of course, even in the case of transmitting to the group file, the image file to be transmitted as shown in Figure 3a can be compressed to increase the transmission efficiency before transmission.

Hereinafter, an image file structure according to the present invention will be described with reference to FIG. 4B.

The individual image files 452, 454, and 456 may be designated and transmitted as one group file 450.

In this case, first, the individual image files 452, 454, and 456 are converted to the compressed image files 472, 474, and 476 via the process of FIG. 4A.

 The group transmission file 480 may be generated by further including header information 482 for the group image file in the converted compressed image files 472, 474, and 476.

Only the caption information may be included in the header information 482 included in the group transmission file, and transmission information related to the group transmission file may be included in the transmission table and transmitted (see FIGS. 10A and 10B).

Other descriptions are the same as in FIG. 4A and will be omitted.

5A is a diagram illustrating the structure of a header file according to an embodiment of the present invention.

In a newspaper company or the like, a method of transmitting an image including a plurality of photographs and the like, as well as a description of a plurality of photographs, for example, an article, etc., is very useful. In other words, there is an urgent need for a method of transmitting an image with an article rather than editing an image, and managing the image by linking the article with the article.

However, in the past, there was no way to provide such a function.

According to the present invention, text information such as an article corresponding to the image may be transmitted including caption information corresponding to each image.

Hereinafter, according to an embodiment of the present invention, a method of associating text with an image based on caption information input method for an image file used in Photoshop will be described.

Of course, the present invention is not limited to the Photoshop program, and it is natural that caption information can be inserted according to the header structure provided by the graphic program, and Photoshop is used as an embodiment of the present invention to help the understanding of the present invention. Let's explain.

Referring to FIG. 5A, an image header of Photoshop includes an image file version 500, a Photoshop version 505, a File Info 510, and Photoshop other information and image file data 515.

 The image file version 500 includes version information about the Photoshop image file, and the Photoshop version 505 includes version information of Photoshop.

The file info 510 may include caption information according to the present invention, and the photoshop other information and the image file data 515 include other information and image file data 515 necessary for photoshop. .

According to the present invention, caption information may be inserted into the file info 510.

Hereinafter, the description of the file info will be described in detail with reference to FIG. 5B.

5B is a diagram illustrating a table of a structure of a file info according to an exemplary embodiment of the present invention.

Referring to FIG. 5B, the header type 520 of the file info includes headers such as a caption 530, a caption writer, a head line, a special list, and the like. have.

Among the headers, the caption information according to the present invention can be read (READ) and written (WRITE) using the caption header 530.

The header type may be determined through the header identifier 523. If the header identifier 523 is '$ 02 $ 78', the data following the header identifier 523 is caption information.

The header length 525 that can be inserted into the caption information is 2 bytes, English can input 65536 characters, and Korean can input 32768 characters.

That is, caption information according to the present invention may be inserted corresponding to the header structure of all graphic programs including text information in the header.

A method of reading (READ) and writing (WRITE) caption information using the caption header 530 will be described in detail with reference to FIGS. 5C and 5D.

5C is a flowchart illustrating a process of reading caption information according to an exemplary embodiment of the present invention.

According to the present invention, caption information can be provided through a caption window provided in the user interface screen according to the present invention.

Hereinafter, a process of reading caption information will be described with reference to FIG. 5C.

If the image file is opened in step 550, the opened image file is read in step 553.

In step 557, the type of the read file is determined using the header portion of the file. In other words, it is determined whether the file is a Photoshop file.

As a result of the determination, in the case of the Photoshop file, data is read by the header size preset in Photoshop in step 563.

In step 567, it is determined whether the caption information exists using the header identifier.

If a header identifier exists in step 567, the data following the header identifier, that is, caption information is extracted in step 569.

Through the above steps, the caption information can be read and the process of writing the caption information will be described with reference to FIG. 5D.

5D is a flowchart illustrating a process of writing caption information according to an exemplary embodiment of the present invention.

According to the present invention, caption information may be input through a caption window provided in a user interface screen according to the present invention.

Hereinafter, a process of writing caption information will be described with reference to FIG. 5D.

If the image file is opened in step 580, the opened image file is read in step 583.

In step 587, the type of the read file is determined using the header portion of the file. In other words, it is determined whether the file is a Photoshop file.

As a result of the determination, if it is a Photoshop file, caption information is extracted in step 587, and a new file corresponding to the image file is generated.

In step 595, caption information is recorded in the new file, and in step 597, image data is recorded in the new file in which the caption information is recorded.

In step 599, the existing image file is deleted, and the name of the generated new file is changed to the name of the existing image file, thereby generating an image file in which caption information is recorded.

That is, an existing image file may be generated as an image file in which caption information corresponding to a header structure provided by Photoshop is recorded.

6a to 6b are views for the compression method according to the present invention.

6A illustrates a compression procedure according to an embodiment of the present invention.

Referring to FIG. 6A, the compression scheme according to the present invention consists of a process of image pre-analysis, two-dimensional wavelet transform (DWT), quantization, and encoding.

The biggest impact in image file transfer is the size of the image data. In other words, in order to save the storage space of the storage medium and compress the size of the image data which has an absolute influence on the transmission speed, and to maintain the image quality, a compression method that can eliminate or minimize the damage of the data during the compression process is required. .

The compression scheme by the wavelet algorithm according to the present invention can provide excellent image quality at a high compression ratio. In addition, the compression scheme according to the present invention provides fast compression and decompression speed, and the user can select image compression to allow lossless compression and loss.

That is, the user may be configured to transmit the image of a predetermined size or more after compression by the compression method according to the present invention.

According to the compression method according to the present invention, a JPEG file is compressed to a size of 1/3, and a TIF file can be compressed to 1/10.

In addition, it provides a function to set the compression ratio to the user, and provides a preview function and a scaled image reproduction function according to the compression ratio. Here, magnification is a method of making a change such as enlarging or reducing the size of an image as a technique of graphics. For example, to enlarge an image six times, the coordinate axis of each data may be six times.

In addition, by using a TIFF image among the existing image formats, the present invention can transmit an image file while maintaining the sharpness of the image compared to a file compression method that basically causes image loss, such as a JPEG file.

Hereinafter, the compression method according to the present invention will be described with reference to FIG. 6A.

As described above, the compression method according to the present invention is an image compression method using wavelet transform.

The compression method using wavelet transform is superior in image quality and compression efficiency than conventional compression (JPEG standard, ITU T.81) based on the existing DCT algorithm. It is also faster to compress than fractal image compression, and the compression scheme can regenerate the entire image in the rest of the data space by randomly using a definite sequence of bits instead of using data positions.

The compression scheme according to the present invention consists of a process of image preliminary analysis 600, two-dimensional wavelet transform (DWT) 606, quantization and encoding 610.

By preparsing the image in step 600, the RGB signal is converted into a YUV signal.

That is, in this step the image data is converted to grayscale on different image types and a series of chromaticities. The above step is a step before the start of the compression is converted from the Algibi (RGB) method to YUBV method, which is the most suitable form for the wavelet conversion step.

The red-green-blue (RGB) method refers to a color model or color display method that defines colors by red, green, and blue. The RGB system that displays colors by mixing red, green, and blue, which are the three primary colors of light, is employed in color televisions and color monitors of many computers (or display devices using light other than print media).

RGB method uses the additive color method that mixes the ratio of red, green and blue to make the desired color. In other words, the color of a point on the screen is made of a combination of three colors.

R is red, G is green, B is blue, R + G = yellow, R + B = red purple (magenta), B + G = cyan (Cyan), R + G + B = white, and none of R, G and B is applied (i.e. If nothing shines), it becomes black. In this way, the color becomes six colors according to the combination of whether R, G, and B are visible or not.

The YUB method means a luminance signal and a subcarrier central axis signal. In other words, the abbreviation used to refer to the analog luminance signal and the chrominance signal in the system, Y means the luminance signal, U, V means the two sub-carrier central axis used in the PAL method, color difference signals of BY, RY is processed U This is used to modulate the PAL subcarriers on the V-axis. This mix occurs because U and V are associated with the color chrominance signal.

In step 605 a two-dimensional wavelet transform (DWT) process is performed.

Correlation of information of each pixel value may be removed through the 2D wavelet transform (DWT or DWT). In other words, information that was originally distributed in the entire image is concentrated and stored in fewer coefficients.

The DWT is very similar to the Discrete Fourier Transform (DFT) method, except that it does not use the trigonal Sine or Cosine function to analyze the image data.

The basic function is scaled and wavelet technology, and it uses both orthogonality and dense representative information representation technology to perform the reconstruction process independently of the conversion process. Compression can be performed.

This method provides the advantage that the image data can be analyzed without generating windowing effects that can occur by applying infinite sine function to the limited image data using the DFT method.

The image signal represented two-dimensionally may be transformed using a two-dimensional transform scheme. In other words, this dimensional transformation is achieved by a one-dimensional transformation applied independently to the columns and rows of the image.

The DWT method divides an image into four new images within the wavelet area. The first image contains low-pass information, the other two contain horizontal and vertical high-pass information, and finally diagonal information.

Then, the transformation is applied repeatedly and repeatedly until the low-pass image finally contains one pixel in the low-pass image.

By quantizing and encoding in step 610, the compression process is completed.

In the quantization and encoding process, a position and an order of image information to be displayed in a stream of data are determined. That is, important information can be placed at the beginning of the data stream and relatively less important data can be left behind or deleted.

Quantization refers to the range that a value takes, divided into several discrete intervals. Each interval may or may not be the same interval and is represented by one value within that interval. Examples are statistical distribution tables, A / D conversions that convert consecutive values into discrete values, and so on.

Unlike the conventional algorithm, the required information in the image data sequence is selected and ordered through quantization and encoding. That is, through quantization, image information may be separated into important information transmitted to a coder and information that is not important and is ignored.

That is, a new encoding strategy using two steps is used, such as the quantization and encoding process according to the present invention. Through the above process, it is possible to improve the compression ratio and maintain the accurate compression quality.

Among them, the quantization step can reduce the number of wavelet coefficient variables required for the operation, and fewer bits for each coefficient due to the smaller representation values in the encoding step. It is necessary. It is desirable to decide how many steps of quantization to use during the encoding process.

Initially, all coefficients are quantized in a dense way, but if there is enough area left in the data sequence, the quantization interval becomes narrower and tighter until there are no errors and no loss of conversion.

6B is a diagram illustrating a two-stage conversion method to which a two-dimensional DWT method is applied according to an exemplary embodiment of the present invention.

Referring to Figure 6b, a two-step transformation example with this dimensional DWT method is shown, and the actual implementation uses four to six transformation steps.

 Referring to FIG. 6, a two-step wavelet transformation process of a grayscale image is shown.

In another aspect, the conversion process according to the present invention for calculating DWT may use a very fast algorithm based on integer arithmetic. The algorithm prevents conversion errors caused by rounding, thus enabling perfect lossless compression.

The lossless compression ratio of the present invention is better compared to LZW compression results based on purely entropy encoding algorithms.

Kinds Elapsed time (compression / release) Damage File size after compression Remarks Compression method according to the present invention 25/25 Sec No damage 3.5 MB Ideal for output transmission JPEG Standard 20/15 Sec With damage 1.5 MB It is so damaged that it cannot be used as a file for output. LZW 27/25 Sec No damage 32 MB Compression rate is too low for high speed transfer

Referring to Table 1, the average result of decompressing a 50 MB TIFF image file is shown. Table 1 shows data calculated based on the results of experiments based on the Pentium III 500 MHz.

7 is a diagram illustrating a user interface when designating a storage location of an image file according to an exemplary embodiment of the present invention.

According to the present invention, it is possible to designate a storage location of an image file to be stored in the reception center terminal in the transmission center terminal.

Hereinafter, a storage location designation method of an image file will be described with reference to the user interface illustrated in FIG. 7.

Referring to FIG. 7, a user interface according to the present invention includes a category window 700, a directory window 710, an image window 720, a caption window 720, and a search window 740.

The category window 700 is a window provided when a database is constructed and a search engine can search the index.

When the database is established, the image is preferably stored in the database, not only image data, caption information, but also thumbnails of the image data.

If any one of the arbitrary folders displayed in the category window 705 is designated, thumbnail, file name, and caption information corresponding to the image file belonging to the folder is displayed through the search window 720.

Here, a thumbnail corresponding to the image file is stored in a database in advance, so that when it is displayed in a search window, it does not burden the receiving center terminal.

The directory window 705 displays the directory structure of the reception center terminal so that the transmission center terminal can designate the location of the image file stored in the reception center terminal with reference.

When an arbitrary folder displayed in the directory window 705 is designated, thumbnail, file name, and caption information corresponding to the image file belonging to the folder is displayed through the search window 720.

When the thumbnail is displayed in the search box, a thumbnail is generated in real time in the directory structure, so that a time at which a thumbnail corresponding to the image file included in the category folder is displayed on the screen is displayed. Takes more.

If a folder in which the image file is to be stored is designated in the category window 700 or the directory window 705, the image file included in the folder is displayed through the search window 315.

Therefore, it is possible to designate a location to store the image file to be transmitted through the above user interface.

8 is a flowchart illustrating a method of designating a storage location through a directory window according to an exemplary embodiment of the present invention.

Hereinafter, a method of designating a storage location of an image file through a directory window according to an embodiment of the present invention will be described with reference to FIG. 8.

In step 800, the transmitting center terminal transmits a directory list request signal to the receiving center terminal. In step 803, the receiving center terminal extracts the directory list and transmits the directory list extracted in step 805 to the transmitting center terminal.

In step 810, the receiving center terminal displays the directory list on the screen. In operation 815, directory information for storing an image file to be transmitted from the directory list is received through an input device coupled to the transmission center terminal.

The directory information is extracted in step 820, and when the image file is transmitted in step 825, the directory information is included.

In operation 830, the receiving center terminal extracts the directory information, and stores the received image file in a directory corresponding to the directory information in operation 835.

9 is a flowchart illustrating a method of designating a storage location through a directory window according to an exemplary embodiment of the present invention.

Hereinafter, a method of designating a storage location of an image file through a category window according to an embodiment of the present invention will be described with reference to FIG. 9.

In step 900, the transmitting center terminal transmits a category list request signal to the receiving center terminal. In step 903, the receiving center terminal extracts the category list and transmits the category list extracted in step 905 to the transmitting center terminal.

In step 910, the receiving center terminal displays the category list on the screen. In operation 915, category information for storing an image file to be transmitted from the category list is received through an input device coupled to the transmission center terminal.

The category information is extracted in step 920, and when the image file is transmitted in step 925, the category information is included and transmitted.

In operation 930, the receiving center terminal may extract the category information, and store the received image file in a category corresponding to the category information in operation 935. When storing the image file, a thumbnail corresponding to the image file may be generated and stored.

In order to facilitate understanding of the present invention, the transmission center terminal performs only a transmission process in FIG. 8 to FIG. 9, and the reception center terminal has been described based solely on the reception process of an image file. Naturally, it is possible to send a file and to receive an image file at the transmission center terminal.

10A to 10B are diagrams illustrating a file transfer table according to the present invention.

The file transfer according to the present invention may be transmitted by designating a storage location of an image file using a directory window or a category window. 10A to 10B illustrate the transmission table generated when the image file is transmitted using the category window.

As mentioned above, a category is a file location designation method that can be provided when a database is built.

Hereinafter, a file transfer table generated during file transfer will be described with reference to FIGS. 10A to 10B.

10A is a diagram illustrating a transmission main table according to an embodiment of the present invention.

Referring to FIG. 10A, the transmission main table may include its own node 1000, a higher node 1005, a transmission number 1010, a transmission title 1015, an ID 1020, a target headquarter ID 1025, and a transmission start time ( 1030, a transmission end time 1040, and the like.

The node 1000 includes directory information of a location where the image file is to be stored.

The upper node 1005 refers to the parent node of the own node 1000.

The transmission number 1010 is a number assigned by the IP relay server according to the transmission order of the image file, and a transmission title 1015 may be assigned to correspond to the transmission number 1010.

The ID 1020 refers to an ID corresponding to the transmitting center terminal, and the target head office ID 1025 refers to an ID corresponding to the receiving center terminal.

Information about the time at which the transmission is started is stored at the transmission start time 1030, and information about the time at which the transmission is finished is stored at the transmission end time 1040.

The transmission table as described above may be generated regardless of the individual image file and the group image file. In addition, a detail information table is generated according to the number of image files included in the file.

Hereinafter, an item of a detailed information table will be described with reference to FIG. 10B.

10B illustrates a detailed information table according to an embodiment of the present invention.

The detail table may correspond to the number of image files to be transmitted, corresponding to the transmission main table.

Referring to FIG. 10B, the detail table includes a transmission number 1050, a serial number 1055, an upper node 1060, a file name 1065, a department code 1070, a file thumbnail 1075, and a file size. 1080, file width and height 1085, file record item 1090, and the like.

The transmission number 1050 stores the same contents as the transmission number 1010 of the transmission main table.

A serial number 1055 is assigned corresponding to the number of image files transmitted corresponding to the transmission main table.

In addition, the detailed information table includes an upper node 1060, a file name 1065, a department code 1070, a file thumbnail 1075, a file size 1080, a file width and height 1085, and a file record. 1090, and the like, and thus detailed description thereof will be omitted.

11A-11B are tables illustrating a file transfer protocol according to one preferred embodiment of the present invention.

The protocol according to the present invention enables the P2P (P2P) image transmission that can be applied to the existing IP. In addition, it is possible to transfer high-capacity image data quickly by compressing more than 90% of data for speedy data transmission. As described above, lossless compression is excluded without loss in compression / decompression such as conventional JPEG for data stability. do.

According to the present invention, the amount of 400MB is compressed to about 40MB through the data loss and compression process without compression loss according to the present invention, and tested through the existing ADSL, about 1 minute 40 seconds to transfer the 40MB It takes time.

According to the present invention, a peer-to-peer (P2P) transmission method that does not go through a server is used, and high-quality and high-capacity images can be compressed up to 1/10 using an image compression method according to the present invention. In addition, it is possible to minimize the load on the network by managing only basic access information in the server by the protocol optimized for the compression method and the ultra-fast transmission method. In addition, it is a transmission method that can be used with confidence because the server manages the information when network exception, PC error or other exception occurs.

The protocol according to the present invention is designed to enable stable transmission between floating IPs such as ADSL while using TCP / IP, and is designed to correspond to the compression scheme provided by the present invention.

In particular, when the transmission speed between the upload and download of ADSL is different, the present invention has the advantage that one reception center terminal can simultaneously receive image files transmitted by 15 transmission center terminals at a speed of 512 KByte.

In other words, the image file can be received at the same speed as the leased line using ADSL without constructing the expensive leased line.

Hereinafter, a protocol according to the present invention will be described with reference to FIG. 11A.

The basic structure of a message according to the present invention consists of a header and content. In addition, it is preferable to use the TCP / IP protocol according to the present invention and transmit using the 80000 and 80001 ports.

The image file according to the present invention is inserted into the contents, and the header 1100 and data 1200 having the structure as shown in FIG. 11A are inserted into the header.

The header 1100 is composed of a header identifier, a file name, a file group name, an actual file size, and a compressed file size. After the header, the actual image data 1200 is divided into 4096 bytes and inserted.

The header identifier will be described with reference to FIG. 11B.

Image files according to the present invention are classified into packets, which are classified as follows according to the present invention.

That is, a packet according to the present invention is identified by a header identifier, and the header identifier is a file information identifier 1150, a data information identifier 1155, and a final data identifier 1160 when in accordance with a preferred embodiment of the present invention. ), A connection completion identifier 1165, a wait completion identifier 1170, a transmission completion identifier 1175, and an error occurrence identifier 1180.

The file information identifier 1150 indicates that the packet is a packet including basic information of a file.

The data information identifier 1155 indicates that the packet is a packet including image data, and according to an exemplary embodiment of the present invention, the image data is divided into 4096 bytes and transmitted.

The final data identifier 1160 indicates that the packet is a packet including the last block fragment of the compressed file when the file is cut into blocks and transmitted, and the data includes the last block fragment of the compressed file.

In addition, the packet identifier in the image transmission protocol through the network according to the present invention may include a connection completion identifier 1165 indicating that the reception connection is completed, and a wait completion identifier 1170 indicating that the waiting state is completed for receiving a file. ), A transfer completion identifier 1175 indicating that the file transfer is completed, an error occurrence identifier 1180 indicating an error occurrence, and the like.

As described above, the image transmission method and system according to the present invention has the effect of transmitting, managing and searching for images using a peer-to-peer (P2P) method.

In addition, the present invention has an effect that can provide a method and system that can improve the transmission efficiency while preventing the degradation of the image by using a compression algorithm with a low loss or loss rate.

In addition, the present invention has an effect that can be transmitted by compressing a plurality of image files into a single file through a peer-to-peer (P2P) method between the reception center terminal and the transmission center terminal in the transmission center terminal.

The present invention also has the effect that the transmission center terminal can store image data in a designated folder of a storage device in the reception center terminal.

The present invention also has the effect of storing image data in a category designated in a database coupled to a transmission center terminal.

In addition, the present invention has the effect that can be transmitted to one file by adding caption information to the image file.

In addition, the present invention has the effect that can be used to search the image file by using the caption information.

In addition, the present invention has the effect of transmitting and receiving images while maintaining the network connection method by the existing floating IP method through the transmission and reception program using the floating IP.

Although the above has been described with reference to a preferred embodiment of the present invention, those skilled in the art to which the present invention pertains without departing from the spirit and scope of the present invention as set forth in the claims below It will be appreciated that modifications and variations can be made.

1A illustrates an image transmission system via a network in accordance with one preferred embodiment of the present invention.

1B illustrates an image transmission system via a network according to another preferred embodiment of the present invention.

2 is a flowchart illustrating an image file transfer procedure according to an exemplary embodiment of the present invention.

3 is an initial screen of an image transmission program according to an exemplary embodiment of the present invention.

4A illustrates an image file generation method for an individual file according to an exemplary embodiment of the present invention.

4B illustrates a method for generating a transmission image file for a group file according to an exemplary embodiment of the present invention.

5A illustrates the structure of a header file according to an embodiment of the present invention.

FIG. 5B illustrates a table of the structure of a file info in accordance with a preferred embodiment of the present invention. FIG.

5C is a flowchart illustrating a process of reading caption information according to an exemplary embodiment of the present invention.

5d is a flowchart illustrating a process of writing caption information according to an exemplary embodiment of the present invention.

6A illustrates a compression procedure according to one preferred embodiment of the present invention.

6B is a diagram illustrating a two-stage conversion method to which a two-dimensional DWT method is applied according to an embodiment of the present invention.

7 illustrates a user interface when designating a storage location of an image file according to an exemplary embodiment of the present invention.

8 is a flowchart illustrating a method of designating a storage location through a directory window according to an exemplary embodiment of the present invention.

9 is a flowchart illustrating a method of designating a storage location through a directory window according to an exemplary embodiment of the present invention.

10A illustrates a transmission main table in accordance with a preferred embodiment of the present invention.

10B illustrates a detail table in accordance with one preferred embodiment of the present invention.

11A-11B illustrate a file transfer protocol in accordance with one preferred embodiment of the present invention.

<Description of the symbols for the main parts of the drawings>

110: transmission center terminal

120: IP relay server

130: reception center terminal

140: network

700: Category window

705 directory window

710: image window

715: caption window

Claims (21)

A method for transmitting an image in a transmission center terminal combined with an IP relay server and a reception center terminal over a network, Receiving, by a transmitting center terminal, a receiving center IP address from an IP relay server; Transmitting, by the transmitting center terminal, a folder information request signal to a receiving center terminal; Receiving, by the transmitting center terminal, folder information from a receiving center terminal; Displaying the folder information on a display device of the transmission center terminal;  Receiving location information for storing image data from a user through an input device of the transmission center terminal; And Transmitting a transmission file including the location information, image data and caption information corresponding to the image data to the receiving center terminal; Including, And the reception center terminal extracts the location information and stores the image data and the caption information in a location corresponding to the location information. The method of claim 1, And the folder information is any one selected from a directory list and a category list. The method of claim 1, The caption information is an image transmission method over a network, characterized in that consisting of text. The method of claim 1, The caption information is identified by a caption information identifier. delete The method of claim 1, And if a plurality of images are included in the image data, a detailed transmission table is generated according to the number of the images. The method of claim 1, And the image data is compressed by a wavelet method. The method of claim 7, wherein In the wavelet compression algorithm, the discrete wavelet transformation is performed about 4 to 6 times. The method of claim 1, The transmission file is an image transmission method through a network, characterized in that the transmission divided into blocks. The method of claim 9, The block unit is an image transmission method over a network, characterized in that 4K bytes. A method for transmitting an image in a reception center terminal combined with an IP relay server and a transmission center terminal over a network, Transmitting, by a reception center terminal, an IP address corresponding to the reception center terminal to an IP relay server; Receiving, by the reception center terminal, a folder information request signal from a transmission center terminal; And extracting this folder information; Transmitting the folder information to the transmission center terminal; Receiving a transmission file including location information and image information for storing image data from the transmission center terminal, the image information including image data and caption information corresponding to the image data, and the location in the transmission file. Extracting the information, the image information, and the caption information; And And storing the image data and the caption information at a location corresponding to the location information. delete delete delete delete delete delete delete delete delete delete