JPH09200500A - Device for embedding identification data in digital images - Google Patents

Abstract

(57) An object of the present invention is to provide an apparatus capable of embedding identification data whose source is known in an image which is copied in whole or in part in trimming copy. SOLUTION: Of the R plane 1R, the G plane 1G, and the B plane 1B forming the color original image 1, 1R,
The color processed image 3 is created by embedding the monochrome binary identification image 2 only into 1B without processing 1G.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for embedding identification data in a digital image, and more particularly to an identification data embedding device that does not cause deterioration of image quality even when embedding identification data.

[0002]

2. Description of the Related Art In recent years, due to the evolution of digital technology such as computers, it has become possible to convert images such as photographs into digital data and store them. Digital data is easy to copy, and duplicates are exactly the same as the original, making them very manageable.

However, when the owner of the original data sells this data, the original owner does not know at all even if the data once released is copied by a third party somewhere. However, even if I know that the person who copied the whole or trimmed a part without permission sells the data, it is either a copy of this data based on this original data, or it was created completely separately. There was no way to tell if there was.

[0004]

SUMMARY OF THE INVENTION In order to solve the above problems, the present invention provides identification data for an image which is copied wholly or partly which is trimmed and whose origin is known. It is an object of the present invention to provide a device capable of embedding an embedded device.

[0005]

SUMMARY OF THE INVENTION With respect to a digital image consisting of three planes of RGB, the above-mentioned problem is that a specific bit of data of one plane of each pixel of this digital image is converted into data of a corresponding pixel of a monochrome binary image. It is solved by changing according to.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below. FIG. 1 is a diagram showing the concept of embedding identification data according to the present invention. In FIG. 1, 1 is R (red),
An original image composed of 3 planes of G (green) and B (blue) 8 bits each, 2 is a monochrome binary identification image embedded in the original image 1 as identification data, and 3 is an identification image for the original image 1. 2 is the processed image in which it is embedded. As the identification image 2, as shown in FIG. 1, the company name of the original image is expressed in a size that covers the entire surface, such as "Production by XX Co., Ltd." It is preferable to use one.

As shown in FIG. 1, the R plane 1R and the G plane 1G of the original image 1 are not processed at all, and the identification image 2 is embedded in the B plane 1B.
B ′. Then, 1R, 1G, and 1B ′ are combined to form the processed image 3.

FIG. 2 is a diagram showing an identification data embedding device of the present invention. The identification data embedding device includes a computer main body 11, a display 12, a keyboard 13, a mouse 14, a hard disk 15, and an identification data embedding program 16 activated on the computer main body 11.
It consists of.

Next, a specific processing operation of this apparatus will be described. When the identification data embedding program 16 is started on the computer main body 11, the computer main body 1
Reference numeral 1 reads the original image 1 and the identification image 2 stored in the hard disk 15.

Next, the least significant bit of the B plane of each pixel of the original image 1 is changed to the value of the corresponding pixel of the identification image 2. For example, when the value of the B plane of a pixel in the original image 1 is “128”, that is, when it is expressed in bits as “10000000”, the identification image 2
If the corresponding pixel value of 1 is 1 (white), the original image 1
Bit is “10000001”, that is, the value is “12
9 ”and the value of the corresponding pixel of the identification image 2 is 0 (black), it remains“ 10000000 ”.

When the value of the B plane of the pixel of the original image 1 is "55", that is, when it is expressed in bits as "001101111", the value of the corresponding pixel of the identification image 2 is 1 (white). If so, the bit of the original image 1 is not changed, and if the value of the corresponding pixel of the identification image 2 is 0 (black), “00110110”, that is, the value is changed to “54”. In this way, processing is performed for each pixel and the identification data is embedded, and the processed image 3 is completed. This processed image 3 is FD, CD-RO
It is stored in M or the like, or distributed by communication.

Next, when the processed image 3 is distributed,
A procedure for confirming whether or not this image is the image that has been subjected to the above processing by the image identification device will be described below. The image identification device has the same hardware configuration as the identification data embedding device shown in FIG. 1 with an image identification program added. When the image identification program is started in the image identification device, the image to be identified is read, the least significant 1 bit of the B plane of each pixel is extracted, and displayed on the display. If the displayed image is the same as the identification image 2, it can be seen that the image to be identified is the processed image 3.

Since the identification image 2 is an image expressing some meaning as shown in FIG. 1, the source can be seen at a glance simply by displaying it on the display. Moreover, if the expression that allows the entire image to be identified is used as the identification image, it is possible to identify even if the image is trimmed.

Although the present invention has been described above in the case of operating the least significant bit of the B plane, the present invention is not limited to this case. However, the operation of the B plane is less affected when the image is viewed with the naked eye than the operation of the R plane and the G plane, and the operation of the least significant bit is another 1 bit or a plurality of bits. Considering the fact that the change of data is smaller than the operation of, the case of the above example is optimal.

[0015]

According to the present invention, for an image consisting of three planes of RGB, the specific bit of the data of one plane of each pixel of this image is changed according to the data of the corresponding pixel of the monochrome binary image. Therefore, even if this image is copied without permission, it is possible to easily identify whether or not it is a copied one by extracting and displaying the specific bit of one plane of this image.

[Brief description of drawings]

FIG. 1 is a flowchart illustrating the concept of embedding identification data according to the present invention.

FIG. 2 is a block diagram of an identification data embedding device of the present invention.

[Explanation of symbols]

 1 original image 2 identification image 3 processed image 11 computer body 12 display 13 keyboard 14 mouse 15 hard disk 16 identification data embedding program

Claims (3)

[Claims] 1. A digital image composed of three RGB planes is characterized in that a specific bit of data of a specific plane of each pixel of the digital image is changed according to data of a corresponding pixel of a binary image. Device for embedding identification data in digital images 2. The identification data embedding device according to claim 1, wherein the specific bit is the least significant bit. 3. The identification data embedding device according to claim 1, wherein the specific plane is a B plane.