Subliminal image fuckery eliminating device

Subliminal image eliminating device

Shingo Hatano 慎互 畑野  ;) 10 points


Abstract
PROBLEM TO BE SOLVED: To provide a subliminal image eliminating device that eliminates a subliminal image from a moving picture so as to prevent a viewer from being influenced by suggestion of the subliminal effect. SOLUTION: The subliminal image eliminating device is provided with a frame memory 1 that can store data by at least 3 frames, a pixel change quantity detection circuit 3 that compares the data by 3 frames stored in the frame memory 1 and detects a pixel change amount (motion quantity) among the frames so as to discriminate a subliminal image, and a frame extract circuit 4 that extracts the frame data including the discriminated subliminal image.

JP2002330453A
JP Application

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Other languages Japanese Inventor Shingo Hatano慎互 畑野 Original Assignee Mitsubishi Electric Corp三菱電機株式会社 Priority date 2001-04-27
Family: JP (1)
Date
App/Pub Number
Status
2001-04-27
JP2001130901A
Pending
2002-11-15
JP2002330453A
Application
Info Cited by (3) Similar documents Priority and Related Applications External links EspacenetGlobal DossierDiscuss

Description
translated from Japanese
DETAILED DESCRIPTION OF THE INVENTION
[0001]

The present invention relates to relates to the removal device subliminal image with subliminal effect.

[0002]

BACKGROUND OF THE INVENTION A subliminal image, inserted into the moving image data to be continuous, is intended subliminal effect the recipient of the moving image subjected implied unconsciously.

[0003] That is, in order to obtain a moving picture in a television broadcast or the like, for example, continuously supplying an image of 60 frames per second, but a 1 frame completely different image of them (subliminal images) the viewer can not be viewed. However, it acts on the subconscious of the viewer, so that the information displayed as a subliminal image is imprinted.

[0004]

Although THE INVENTION Problems to be Solved] many countries are legally prohibited from broadcasting the subliminal image, if deliberately or erroneously is subliminal image had been broadcast, subliminal to conventional video equipment since there is no one that has the function of removing determine the image, moving image that may contain subliminal images are provided to the viewer, it could not prevent the viewer is affected It was.

[0005] The present invention has been made to solve the above problems, to remove the subliminal image from a moving image, a subliminal image removal device capable of preventing that implied is applied to the viewer by subliminal stimuli an object of the present invention is to provide.

[0006]

According to the present invention SUMMARY OF THE INVENTION Claim 1 subliminal image removing device according includes a frame memory for storing the input order of frame data of a plurality of frames given in time series, a frame of said plurality of frames among the data, the frame data of the at least three frames, as compared for each pixel, at least detects a change amount of all the pixels between the frames, preset 1
Receiving a threshold, the pixel change amount detecting circuit for determining the frame data having a subliminal image based on a comparison between pixel change amount between the frames, the result of the determination pixel difference detection circuit, wherein at least from the frame data of the three frames, and a frame extraction circuit extracting the frame data having the subliminal images.

[0007] subliminal image removing device according to claim 2, wherein according to the present invention, the at least one threshold comprises a first and second threshold, the first threshold value, said at least of the frame data of the three frames is used to determine the first pixel difference between the forefront of the frame data and the end of the frame data, the second threshold, the at least three frames of frame data, said at least one way of forefront and the rearmost frame data, is used to determine the second pixel change amount between the center of the frame data, said first
The pixel change amount, the first and to the threshold value or less, and the second pixel change amount, wherein when it is the second threshold or more, the central frame data the subliminal images as determined as having the first and second threshold are set.

[0008] subliminal image removing device according to claim 3 of the present invention, the pixel change amount detection circuit, after the determination of the subliminal images, the outputs of the forefront of the frame data, as having the subliminal images instead of the central frame data extracted, and has a function of writing said forefront or last of the frame data to the frame memory.

[0009] subliminal image removing device according to claim 4, wherein according to the present invention was extracted by the frame extraction circuit, stores the frame data having the subliminal images, further comprising a frame memory for subliminal images, the frame extraction circuit, the stored in the frame memory for subliminal images, and has a function of outputting the read frame data having the subliminal images.

[0010] subliminal image removing device according to claim 5, wherein according to the present invention, the instead of the frame data extracted as having subliminal images, frame interpolation to create an interpolated frame data by interpolating the frame data before and after further comprising a circuit, the pixel change amount detecting circuit has a function of writing the interpolated frame data to the frame memory.

[0011] subliminal image removing device according to claim 6, wherein according to the present invention, the frame memory, a frame memory for storing frame data of the two frames, the pixel change amount detection circuit, three frames It has a function to determine the frame data having the subliminal image based on the frame data, when the frame data is input to the last, performing a determination operation of the frame data having the subliminal images.

[0012]

DETAILED DESCRIPTION OF THE INVENTION <A. Embodiment 1> First, FIG. 1
It shows a conceptual diagram of a video having a subliminal image. To obtain a moving picture, for example, continuously it is necessary to flow a slightly different image of 60 frames per second. Corresponds image frames F1 and F3 are to in FIG. 1, between the two there is a correlation.

Meanwhile, the image frame F2 between the frame F1 and F3 are subliminal images, no correlation between the image frames F1 and F3 to the front and rear, an image having a imprint to information subconscious recipient It has become.

[0014] The transmission order of the frames in Figure 1 frame F1 is the earliest, continues frame F2, F3, for the convenience of the following description, the frame F1 is X + 2 th frame, frame F2 is the X + 1 th frame , frame F3 is referred to as X number of frames.

[0015] <A-1. Device Structure> FIG. 2, as a first embodiment according to the present invention, subliminal image removing device 10
0 of the configuration shown in block diagram.

[0016] Figure 2 subliminal image removal device 100 as shown, as compared with the frame memory 1 capable of storing at least three frames of the frame data, the three frames of the frame data stored in the frame memory 1, detecting a pixel change amount (amount of motion) between the frames, and a pixel change amount detection circuit 3 for discriminating the subliminal images, and a frame extraction circuit 4 extracting the frame data of the discriminated subliminal images.

The image data is, for example, given as 8-bit digital information, to form one frame, for example, about 1024 × 768 pixels, the image data of 8 bits each are required. Moving image is obtained by supplying 60 frames the frames per second.

[0018] Digital video input is given to the pixel change amount detection circuit 3 in FIG. 2, after it is judged whether the subliminal images, frames having a subliminal image frame extracting circuit 4 is withdrawn, as a digital video output and it has a configuration that is output.

The pixel difference detection circuit 3, a frame data allocation control unit 31 for distributing frame data, is connected to the frame data distribution control unit 31, a plurality of pixel data constituting the frame data, comparing between two frames and a pixel data comparison unit 32 which detects the pixel data to be different, based on the comparison result of the pixel data comparator 3, the number of pixel data difference between frames, the rate of the pixel change (pixel change amount) a pixel change amount calculation unit 33 that calculates, receives the data of the pixel change amount calculated by the pixel change amount calculating unit 33 performs a comparison with a preset threshold value, in the frame memory 1, including the subliminal images frame and a determination unit 34 whether there.

The determination in the determination unit 34 result is fed back to the frame data distribution control unit 31, if the frame containing the subliminal image exists, sends the data in the frame memory 1 to the frame extraction circuit 4, a subliminal image to remove the frame including.

[0021] Note that the normal video data, via a frame data allocation control unit 31 will output to the outside by one frame.

Next, the operation of the subliminal image removing apparatus 100 will be described with reference to the flowchart shown in FIG. 3 with reference to FIG.

[0023] <A-2. Device Operation> In the following description, as shown in FIG. 1, is assumed to include subliminal images in the frame F2 is X + 1 th frame.

[0024] First, in step S1, incorporated into the frame memory 1, X + 2 th, X + 1 number, the frame data in the order of X number.

[0025] The frame memory 1 may have a storage capacity of two frames for storing only the X + 2) th and (X + 1 th frame data, the data of X-numbered taken into frame data distribution control unit 31 in the time, it may be performed to detect operation of the subliminal images.

Next, among the three frames of data captured in the frame memory 1, X number and X + 2 th, i.e. before and after the frame data of the frame F2 with subliminal images, frame data distribution control unit 31
Read by, given to the pixel data comparator 32. The comparison of and how the pixel data of the corresponding pixels between the two frames (data commonly applied to the pixels of a specific location of the display screen) is performed, if the change is pixel data, the change pixel is one to count as. Comparative results are given in pixel change amount calculation unit 33, the pixel change amount from the total number of changed pixels (first pixel change amount) is calculated (step S2).

The pixel change amount is the total number of pixels in one frame,
For example it is possible to obtain by the number 768 of pixels 1024 ×, dividing the total number of changed pixels.

[0028] The data obtained pixel change amount, the determination unit 3
Given 4, it is compared with a first threshold set in advance (step S3).

[0029] whether the first threshold value, the frame data captured in the frame memory 1, whether the data of a so-called moving image, also, or even data of a moving image is data with continuous is a threshold for determining whether.

[0030] That is, it is possible to obtain a moving picture by continuously passes a slightly different frame data 60 frames per second, the frame data with each other back and forth, or in the frame data with each other to be in close proximity, the pixel change is small.

[0031] Therefore, in the moving image data, the pixel change amount of the frame data of the X-th and X + 2 th should small. First threshold, in particular, is set on the basis of the pixel change amount of a moving image continuous, here, the A%.

[0032] Incidentally, development in significant These days, such as moving images and still images can be processed digital still camera both, based on the pixel change amounts of the two frame data back and forth,
Acquired image data is, the more the video apparatus including a motion detection circuit for detecting whether a still image or a moving image, the threshold value is a video equipment manufacturers, are treated as know-how specific values .

[0033] Thus, although not able to present specific values ​​even in the present application, those skilled in the art, a range of predictable values.

[0034] Incidentally, the movement for the motion detection there are various methods, for example, the correlation between the current frame while shifting little by little the image before the frame is calculated, and the motion vector shift amount the correlation is maximized including but vector detecting method or the like, in short, for example, as the threshold value a motion vector amount, present in the image to be substantially continuous with a correlation at all image having no image correlated to the front and rear it is sufficient to determine a subliminal image.

[0035] In the present invention, is performed by detecting the pixel change amount of each frame, the threshold is different from the vector detecting method or the like of course.

[0036] In the determination unit 34, if the pixel change amount is less than or equal to A%, frame data X th and X + 2 th is recognized as data of a moving image with a continuous, subsequently, the operation of step S4 move on.

[0037] In the case where the pixel change amount is determined to be greater than A% is either frames of X-th and X + 2 th is the case with the image that varies greatly. This is not only the case with subliminal images, as it may occur in the case of sudden changes in the scene, will be described later, in the present invention, one frame detection is performed subliminal images, discovered subliminal since the image is extracted, at least, it is not X + 2 th frame data is subliminal images. Accordingly, in comparison of the frame data of the X-th and X + 2 th, when the pixel change amount is determined greater than A%, as a normal pixel changes due to sudden changes in scene, X + 2 th frame data to perform the normal image processing is output from the subliminal image removal device 100 via the frame data distribution control section 31 (step S8).

On the other hand, in the case it proceeds to step S4, X + 1 th, i.e. the frame data of the frame F2 with subliminal images, X number or, and the X + 2 th frame data, the frame data distribution control unit from the frame memory 1 read by 31, it applied to the pixel data comparator 32, as in step S2, is calculated from the total number of changed pixels pixel change amount (second pixel change amount).

[0039] The data obtained pixel change amount, the determination unit 3
Given 4 is compared with a second threshold set in advance (step S5).

The second threshold value is a threshold value for X + 1 th frame to determine whether it contains a subliminal image. That is, the X number or X + 2 th frame data is data of moving images with a normal continuity, compared with the X + 1 th frame data, if the result is greater than the second threshold value, X + 1 turn of the frame is one which determines that contain subliminal images.

[0041] Here, the second threshold value is empirically set based on pixel variation between subliminal image and normal image, as in the first threshold value, a know-how basis values,
Here, it is B%.

[0042] Since the pixel change amount of the subliminal image and normal image is larger than the pixel change amount between a normal image, the second threshold value, a value larger than the first threshold value the mutual is effective in preventing erroneous operation and erroneous judgment.

[0043] In the determination unit 34, if the pixel change amount is determined to B% or more, X + 1 th frame is recognized to contain subliminal images (step S6), and via a frame data distribution control unit 31 frame the sampling circuit 4, (here, information specifying the X + 1 number of frames) information for a frame to be withdrawn with, send data in the frame memory 1, the removal of X + 1 th frame including a subliminal image (step S7 ).

[0044] In the frame extraction circuit 4, after the X + 1 th frame data is extracted, in order the X + 2 th frame data performs normal image processing, frame data distribution control unit 31 subliminal image removing device through a 1
00 is outputted from the (step S8), X number of frames the data is returned to the frame memory 1 as the earliest data, the frame data of the subsequent X-1 and No. X-2 No. is input to the frame memory 1 .

On the other hand, the determination unit 34, if it is determined that the pixel change amount falls below B%, X + 1 th frame is recognized as the frame data containing a normal image, X
+2 th frame data to perform the normal image processing,
Via the frame data allocation control unit 31 is output from the subliminal image removal device 100 (step S8), and
Frame data X + 1 and # X number is, the storage position of the in the frame memory 1 is shifted by one, followed X-
No. 1 of the frame data is input to the frame memory 1.

[0046] Here, the concept of handling of frame data in the present invention is schematically shown in FIG. In FIG. 4, the X + 2 th to X-2 No. shows five frame data. Among them, in FIG. 4 (a), X + 2
Ban, X + 1 th, shows a case where the inspection target data PD frame data X number, the three frame data is input to the frame memory 1.

[0047] Then, if it contains a subliminal image X + 1 th frame data, as described above, X +
1st frame data is extracted, and since X + 2 th frame data is output, the next inspection object data PD, X number, X-1 th, the X-2 th.

[0048] <A-3. Function and Effect> As described above, in the subliminal image removal device 100, among the three frames of the frame data supplied in succession,
To perform the detection of the subliminal images in the middle of the frame as the target, a first and a second threshold set in advance, by comparing the pixel change amount between the frames, frame middle, determines whether it contains a subliminal image, if it contains subliminal images. Thus to remove the frame data,
Even if it contains subliminal images in the moving image, it is possible to prevent the viewer is subjected implied by subliminal effect.

[0049] <A-4. In subliminal image removal device 100 described Modification> above, after removal of the X + 1 number of frames including the subliminal images, the frame data of the X number, it is configured to return to the frame memory 1 as the earliest data , in order to eliminate an uncomfortable feeling caused by X + 1 th frame is removed, it may be configured as follows.

[0050] That is, after the X + 1 th frame data is extracted is, X + 2 th frame data to perform the normal image processing, frame data distribution control unit 31
And outputs from the subliminal image removal device 100 via, instead of the X + 1 th frame data, then returned to the frame memory 1, thereafter, X + 2 th, X
Turn, and the X-1 th frame data as the inspection target data, it may be inspected subliminal images.

[0051] As a result, X + 2 No. of frame data is 2
One to becomes, in the moving image data to be continuous and the data before and after is substantially the same, be consecutive X + 2 th frame data, moving image can be obtained without discomfort than the frame data is lost.

[0052] In addition, the X + 2 No. of frame data X + 1
Sometimes used in place of turn of the frame data, even when using a frame data X number instead of X + 1 th frame data, using the frame data allocation control unit 31, be written into the frame memory 1 may, dedicated device is not required.

[0053] The frame data allocation control unit 31, for example using a microcomputer or the like having a memory function may be performed by software the functions described above, also hardware having the functions described above ASIC ( application specific integrated circui
t) and may be made in a gate array system.

[0054] Further, in subliminal image removal device 100, in step S4, the X + 1 th frame data, X number or has shown the configuration for comparing the X + 2 th frame data, frame X + 1) th and (X number comparison with the data, and may perform a comparison with X + 1) th and (X + 2 th frame data, in both comparison, whether both of the second threshold value (B%) or more, of the subliminal images if to determine the presence, it is possible to prevent the misjudgment.

[0055] Further, in subliminal image removal device 100, a configuration has been shown to use the three frames of the frame data supplied in succession as the inspection target data, which need only be three or more, the storage frame to increase the number should increase the storage capacity of the frame memory is determined by considering the possibility of causing an increase in the size and cost of the apparatus.

[0056] <B. Embodiment 2> <B-1 of the embodiment. Device Structure> FIG. 5, as a second embodiment according to the present invention, shown in block diagram the configuration of a subliminal image removal device 200.

[0057] Figure 5 subliminal image removing device as shown 200 includes a frame memory 2 for storing the frame data having a subliminal image (frame memory for subliminal image) drawn in the frame extraction circuit 4A, it is stored in the frame memory 2 It was,
It includes a frame data having a subliminal images, and output switching means 7 for outputting switch between frame data having no subliminal images.

[0058] Other and denoted by the same reference configuration as subliminal image removal apparatus 100 shown FIG. 2, and a duplicate description thereof will be omitted.

[0059] frame extraction circuit 4A, the frame data extracting unit 4 to perform the extraction of the frame data
1, frame memories 2 frame data withdrawn
Together they give, when subjected to subliminal image output command from the outside is read from the frame memory 2,
And a sampling frame data allocation control unit 42 to output toward the output switching means 7.

[0060] The output switching unit 7 is a so-called selector switch, usually, a node A output of the pixel variation detecting circuit 3 is connected, and an output node C is connected,
Although a configuration of outputting the frame data that has undergone the process of detecting subliminal image, when receiving a subliminal image output command from the outside, the frame extraction circuit 4A
In response to subliminal image is output from, has become the node B switches switch, the output of the frame extracting circuit 4A is connected, the arrangement for connecting the output node C.

[0061] <B-2. Function and Effect> As described above, in the subliminal image removal device 200, the frame data drawn in the frame extraction circuit 4A, may be stored in the frame memory 2, it is possible to read as required, withdrawn subliminal image can be confirmed, who is the be clearly inserted in any purpose. Then, if the putting subliminal image has illegality it can be used as a material evidence.

[0062] <C. Embodiment 3> <C-1 of the embodiment. Device Structure> FIG. 6, as a third embodiment according to the present invention, shown in block diagram the configuration of a subliminal image removal device 300.

[0063] subliminal image removal device 300 as shown in FIG. 6, the front and rear of the frame data of the frame data drawn off with a subliminal images, and a frame interpolation circuit 8 for creating frame data by interpolation.

[0064] frame interpolation circuit 8 is returned from the frame extracting circuit 4, the data frames that do not contain subliminal images, wherein the receiving the data frame of a frame and X number of X + 2 th, are interpolated from both frame data, and a frame data interpolation unit 81 for creating data of X + 1 th frame.

[0065] As the interpolation method of the frame data, and field interpolation scheme quality is obtained for the still image, there is a line interpolation scheme quality is obtained for the video,
In addition, the field interpolation to a stationary portion in the image, performs line interpolation in the portion with motion, there is also such a motion adaptive field interpolation method. Both may be adopted any method well known in the art, but if for moving images may be used to line interpolation method or the motion adaptive field interpolation method.

[0066] Incidentally, in order to perform the interpolation operation, the front and rear frame data of the frame data drawn off is required, stored in the frame memory 1 via a frame data distribution control unit 31 to the frame data interpolation unit 81 frame data has a configuration given was.

[0067] created in the frame data interpolation unit 81, X + 1 number is frame data, together with X + 2 and No. X number of frames the data are supplied to the frame data distribution control section 31, the X + 2 th frame data is normal output from the subliminal image removing device 100 to perform the image processing, frame data of X + 1 and # X number is returned to the frame memory 1.

[0068] <C-2. Function and Effect> As described above, in the subliminal image removal device 300, an alternative frame data drawn, the frame interpolation circuit 8
Since created by interpolating from previous and subsequent frames the data in, even for significant image motion, after the frame withdrawal, moving image can be obtained more without discomfort.

[0069] Further, X + 1 th frame data created by the interpolation, since no containing subliminal images, when the frame data of the X-th detection target subliminal images, will be compared with very suitable, subliminal the presence or absence of the image, can be accurately determined.

[0070]

According to subliminal image removing device according to claim 1, wherein according to the present invention, to determine the frame data having a subliminal image in the pixel change amount detecting circuit, based on the determination result, subliminal frame extraction circuit since extracting the frame data having an image that can be output by removing the frame data having a subliminal image, even if it contains subliminal images in the moving image, the viewer is subjected implied by subliminal stimuli It can be prevented.

[0071] According to subliminal image removing device according to claim 2, wherein according to the present invention, can be obtained for determining the presence or absence of the subliminal image as an object the center frame data, a specific configuration.

[0072] According to subliminal image removing device according to claim 3, wherein according to the present invention, instead of the center of the frame data extracted as having subliminal images, writing the forefront or last frame data to the frame memory in, video without uncomfortable feeling image is obtained than if left frame data is lost.

[0073] According to subliminal image removing device according to claim 4, wherein according to the present invention, the frame memory for subliminal images, stores the frame data having a subliminal image, it outputs the frame data read out by the frame extracting circuit since it is, it pulled out a subliminal image can be confirmed, who is the be clearly inserted in any purpose.

[0074] According to subliminal image removing device according to claim 5, wherein according to the present invention, instead of the frame data extracted as having subliminal images, frame memory the interpolated frame data created by interpolation from the frame data before and after by writing to, even after the frame withdrawal, moving image can be obtained more without discomfort.

[0075] According to subliminal image removing device according to claim 6, wherein according to the present invention, it is possible to obtain a minimum configuration for removing frame data having a subliminal image.

BRIEF DESCRIPTION OF THE DRAWINGS
1 is a conceptual diagram of a video having a subliminal image.

2 is a block diagram showing the configuration of a first embodiment of the subliminal image removing device according to the present invention.

3 is a flowchart for explaining the operation of the first embodiment of the subliminal image removing device according to the present invention.

It is a conceptual diagram illustrating the handling of the frame data in the subliminal image removing device according to the present invention; FIG.

5 is a block diagram showing the configuration of a second embodiment of the subliminal image removing device according to the present invention.

6 is a block diagram showing the configuration of a third embodiment of the subliminal image removing device according to the present invention.

DESCRIPTION OF SYMBOLS
7 output switching means, 8 frame interpolation circuit.

Claims (6)
translated from Japanese
[The claims]
1. A time frame memory for storing the input order of frame data of a plurality of frames given in sequence, of the frame data of the plurality of frames, the frame data of at least three frames, respectively compared to each pixel Te, it detects a change amount of all pixels between frames, and at least one threshold that is set in advance, to determine the frame data having a subliminal image based on a comparison between pixel change amount between the frames receiving a pixel change amount detecting circuit, the discrimination results of the pixel difference detection circuit includes a frame data of the plurality of frames, and a frame extraction circuit extracting the frame data having the subliminal images, subliminal image removing device.
Wherein said at least one threshold includes a first
And it includes a second threshold, the first threshold value, among the frame data of the at least three frames, the first pixel change between the top head of the frame data and the end of the frame data is used to determine the amount, the second threshold value, the out of frame data of at least three frames, between said at least one way of forefront and the rearmost frame data, the central frame data the second is used to determine the pixel change amount, the first pixel change amount is equal to or less than the first threshold and the second pixel change amount, the second threshold of If it is greater than or equal, the so that the center frame data is judged as having the subliminal images, said first and second threshold is set, subliminal image removing instrumentation of claim 1, wherein .
Wherein the pixel difference detection circuit, after the determination of the subliminal images, the outputs of the top head of the frame data, instead of the center of the frame data extracted as having the subliminal images,
Has a function of writing said forefront or last of the frame data to the frame memory, subliminal image removing device according to claim 2, wherein.
4. withdrawn by the frame extraction circuit, stores the frame data having the subliminal images, further comprising a frame memory for subliminal images, the frame extraction circuit is stored in the frame memory for the subliminal images has a function of outputting the read frame data having the subliminal images, subliminal image removing device according to claim 1.
5. Instead of the frame data extracted as having the subliminal images, further comprising a frame interpolation circuit for generating an interpolation frame data by interpolating from the frame data before and after the pixel difference detection circuit, It has a function of writing the interpolated frame data to the frame memory, subliminal image removing device according to claim 1.
Wherein said frame memory is a frame memory for storing frame data of the two frames, the pixel change amount detection circuit, the frame data having the subliminal images based on the frame data of the three frames It has the ability to determine, when the frame data is input in the last, performing a discriminating operation of the frame data having the subliminal images, subliminal image removing device according to claim 1.
Cited By (3)
Publication number Priority date Publication date Assignee Title
GB2438689A * 2005-12-05 2007-12-05 Hitachi Ltd Method of detecting correction methods for feature images
WO2007138278A1 * 2006-05-26 2007-12-06 The Secretary Of State For Defence Subliminal image system
JP2013046155A * 2011-08-23 2013-03-04 Nikon Systems Inc Noise detector, reproducer, and noise detection program
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