JPH10145685A - Image pickup system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To attain ciphering of image data from an XY address solid-state image pickup element. SOLUTION: A drive address generating circuit 16 provides an output of a ciphered drive address by a received key and a drive circuit 13 drives an XY address solid-state image pickup element 12 according the drive address to allow the element 12 to provide an output of image data. A rearrangement address generating circuit 18 provides an output of a ciphered rearrangement address that is the same address as that outputted from the drive address generating circuit 16 by using a received key to a data rearrangement circuit 17. The data rearrangement circuit 17 uses the rearrangement address to rearrange received image data into the substantial pixel sequence.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention makes it possible to change the reading order of each pixel of a solid-state image sensor (for example, an XY address type solid-state image sensor) by changing the operation of the driving means of the solid-state image sensor. The present invention relates to an imaging system using the obtained solid-state imaging device.

[0002]

2. Description of the Related Art One of the problems of the conventional imaging system is as follows.
There is a weak point in the system regarding the confidentiality of image data. In the case where image data captured by a certain photographer is reproduced and displayed only by another specific person or transmitted only to another specific person, in a conventional system to increase confidentiality A so-called video scramble technique of changing the pixel order of image data in a subsequent signal processing circuit in accordance with a predetermined rule is often used (for example, Telecommunications Technology Council Report, Advisory No. 44 "12.5 to 12" Technical conditions for satellite broadcasting using .75 GHz ").

However, in the conventional system, there is a problem that no processing for confidentiality of the image data is performed from the television camera to the position just before the scramble circuit and the encryption circuit. From this point, it is desirable that the image signal has already been encrypted at the stage of the output signal of the solid-state imaging device from which the video signal is first obtained in the imaging system.

Another problem with the conventional imaging system is that the source of the image data is not always clear. In a conventional system, a public key cryptosystem (for example, R
SA system, R.A. L. Rivest et al. : "A
method for observing dig
ital signatures and public
c-key cryptosystems ", Comm
u. ACM, pp. 120-126, 1978), it is possible to perform a so-called electronic signature in a signal processing circuit in the system.

However, in the same manner as described above, the format from the television camera to the position just before the encryption circuit is an ordinary unencrypted image data format, which is obtained by a third party and further desired. There was a danger that no signal processing or image data distribution would be performed.

[0006]

As described above, in the conventional imaging system, regarding the confidentiality and the source of the image data, from the television camera in the system to the position just before the scramble circuit and the encryption circuit, the image data is not transmitted. No processing for confidentiality is performed. Therefore, there is a problem that if the image data is obtained by a third party, there is a risk that the image data may be illegally processed or distributed.

Accordingly, an object of the present invention is to provide an imaging system for encrypting the order of data of each pixel at the stage of output from a solid-state imaging device from which a video signal is obtained first.

[0008]

[Means for Solving the Problems]

(First Configuration Example) In an imaging system using a solid-state imaging device in which the reading order of each pixel can be arbitrarily changed,
When the first key information in the encryption method is input, the driving order of each pixel of the solid-state imaging device is changed from the original order to the encrypted order, and the output order of each pixel of the solid-state imaging device is changed. Is arbitrarily variable.

(Second Configuration Example) In an imaging system using a solid-state imaging device in which the reading order of each pixel can be arbitrarily changed, the first key information in the encryption method is input at the time of photographing. The drive order of each pixel of the solid-state imaging device is encrypted to output image data in which the output order of each pixel of the solid-state imaging device is encrypted, and when displaying the image data, When the first or second key information is input, the order of each pixel of the encrypted image data is decrypted and returned to the original order.

(Third Configuration Example) A solid-state image pickup device in which the reading order of each pixel can be arbitrarily changed, a drive address generating means for defining a drive order of each pixel of the solid-state image pickup device, and the drive address generation Driving means for driving the solid-state imaging device according to the order of the driving addresses output by the means; and rearranging the order of each pixel of the image data so as to be different from the order of each pixel of image data output from the solid-state imaging device. A data rearrangement unit for returning to the original pixel order so as to correspond to a spatial arrangement of each pixel of the solid-state imaging device; and a rearrangement address generation unit for generating an address for the rearrangement. When driving the image sensor, the drive address generating means encrypts the drive address by inputting first key information in an encryption method. The driving means drives the solid-state imaging device in accordance with the order of the encrypted driving addresses, and the rearranging address generating means receives the first or second key information in the encryption system. Generating a rearranging address so as to correspond to the order of each pixel of the received image data, and the data rearranging means returns the image data received using the rearranging address to the original pixel order. Features.

(Fourth Configuration Example) A color solid-state imaging device in which the reading order of each pixel can be arbitrarily changed, a driving address generating means for defining a driving order of each pixel of the solid-state imaging device, A driving unit that drives the solid-state imaging device according to the order of the driving addresses output by the driving address generation unit; and a driving unit that drives each of the pixels of the image data so that the order of each pixel of the image data output from the solid-state imaging device is different. A data rearranging unit that rearranges the order to return to an original pixel order so as to correspond to a spatial arrangement of each pixel of the solid-state imaging device; a rearranging address generating unit that generates an address for the rearranging; Exists in the path between the image sensor and the data sorting means,
First video signal processing means for performing video signal processing on the image data, and second video signal processing which is present in a path behind the data rearranging means and performs video signal processing for outputting a reproduced image Means for driving the solid-state imaging device, wherein the driving address generation means encrypts the driving address by inputting first key information in an encryption method, and With the plurality of pixel groups adjacent to each other as one unit, the driving unit encrypts the reading order between the pixel groups of the one unit of the solid-state imaging device in accordance with the order of the encrypted driving addresses, and converts the image data. The first signal processing means performs color signal separation and image information amount compression using the output image data in the pixel group of the solid-state imaging device, The replacement address generating means generates a rearrangement address corresponding to the order of each pixel of the image data received by inputting the first or second key information in the encryption method, and The means returns the image data received using the rearrangement address to the original pixel order, and performs video signal processing for outputting a reproduced image in the second video signal processing means. .

[0012]

FIG. 1 shows the configuration of a first embodiment of an imaging system according to the present invention. FIG. 2 shows a schematic configuration diagram of an XY address type solid-state imaging device used in the first and second embodiments described later.

In FIG. 1, optical information condensed by an imaging lens 11 forms an image on an XY address type solid-state imaging device 12. This XY address type solid-state imaging device 12
Receives the address information of each pixel output from the drive address generation circuit 16 and receives the XY address type solid-state image sensor 12
The driving circuit 13 of the image sensor which outputs a driving pulse for driving is driven.

Here, the XY address type solid-state image pickup device 12
Will be described with reference to FIG. In the figure 41
Reference numerals 44 to 44 denote units constituting one pixel, respectively, a light receiving element for performing photoelectric conversion, and M for selecting a line.
It is composed of an OS transistor switch and the like.

These are, for example, about 500 pixels in the vertical direction,
About 800 pixels are arranged in the horizontal direction. A vertical scanning and interlacing circuit 47 selects a necessary line. For television interlacing, for example, in the case of the frame accumulation mode, selection is made such as line 1, line 3,... In the first field, and the selected line is shifted by one line in the second field. 2, line 4,...

Similarly, in the case of the field accumulation mode,
In the first field, selections are made as (lines 1 and 2), (lines 3 and 4)... In the second field, the combination of selections is shifted by one line (lines 2 and 3), 4 and 5).

The output signals of the pixels 41, 43,... Are connected to a MOS transistor 46 for horizontal scanning. On the other hand, the output signals of the pixels 42, 44,... Are similarly connected to the MOS transistor 45. Then, by operating the horizontal scanning circuit 48, the lines 1, 3,.
Are output from a terminal 50, and output signals from pixels on lines 2, 4,... Are output from a terminal 49.

In the case of the field accumulation mode, the output terminals 49 and 50 are generally used for interlacing.
Are added.

As can be seen from the above configuration, generally, X
In the Y-address type solid-state imaging device 12, a signal of an arbitrary pixel is output to output terminals 49 and 50 by controlling a vertical scanning and interlacing circuit 47 for selecting a required row and a horizontal scanning circuit 48 for selecting a required column. Can be read.

The operation of the entire imaging system will be described again with reference to FIG. The drive address generation circuit 16 receives, for example, a secret key of the photographer A and a public key of a user other than the user in the RSA cryptosystem, which is one of the public key cryptosystems, from the outside. During normal driving without encryption, pixels are selected in order from the upper left corner to the lower right corner when expressed on the playback screen (from the lower left corner to the upper right corner when expressed in FIG. 2).

However, when the above two keys are input,
This original read address order is encrypted so as to be different from the normal order. Details of the operation of the drive address generation circuit 16 will be described later.

As described above, the output signals of the driven XY address type solid-state image pickup device 12 are in an order different from the original pixel order, and are output in the same time series as the signals of a general television camera. Even if processing (color separation, gamma correction, knee correction, level adjustment, color encoder, synchronization signal addition, etc.) is performed, a meaningful image cannot be obtained.

Also, since the RSA encryption method is adopted,
Even if a third party other than Party A and Party B obtains this image data, if it does not obtain Party B's private key (it is assumed that Party A's public key is available), the original pixel order is restored. It is so difficult that it is virtually impossible.

Further, the secret key of the instep is used at the time of encryption,
And only the Party A manages the Party's private key,
If a meaningful image is obtained by a formal decryption method described later, electronic authentication of the source of the image data becomes possible.

The output signal of the XY address type solid-state imaging device 12 is input to a preamplifier circuit 14 and amplified to a predetermined level. In this preamplifier circuit 14,
In some cases, noise reduction processing for reducing noise due to variations in dark current of the XY address type solid-state imaging device 12 for each pixel may be performed. And the preamplifier circuit 14
Is input to an analog / digital (hereinafter, referred to as A / D) converter 15 and converted into digital image data.

These digital image data are transmitted at this stage if necessary, for example, when the photographer's back and the person who processes and displays the image data are far apart from each other. Of course, even if the image data is obtained by a third party at this stage, since the output pixel order has already been encrypted, the contents of the image are kept secret for the same reason as described above.

An output signal of the A / D converter 15 is input to a data rearranging circuit 17. Data rearrangement circuit 17
Then, the image data is rearranged in accordance with the order of the pixel addresses output from the rearrangement address generation circuit 18. The method is as follows.

The rearranging address generating circuit 18 is supplied with the private key of Party B and the public key of Party A from outside. Of course, only the party who is trying to obtain the image data manages the party's private key. When these two keys are input, first, a rearranging address is generated so as to match the pixel order input to the data rearranging circuit 17.

The rearrangement address output from the rearrangement address generation circuit 18 has a one-to-one correspondence with the order of the sent image data. However, the rearrangement address from the rearrangement address generation circuit is X
The original address order on the Y-address type solid-state imaging device 12 does not match. Therefore, the data rearrangement circuit 17 rearranges the image data corresponding to the rearrangement addresses from the rearrangement address generation circuit 18 one by one so as to match the original address order on the XY address type solid-state imaging device 12. You.

By this operation, the image data is rearranged so as to match the spatial arrangement of each pixel on the XY address type solid-state image pickup device 12, and the image data in the original order can be obtained. The operation of the rearrangement address generation circuit 18 will be described later in detail.

The output signal of the data rearranging circuit 17 is input to the video signal processing circuit 19,
Signal processing of a television camera that could not be performed at the output stage of the A / D converter 15 (color separation,
The overall configuration is such that gamma correction, knee correction, level adjustment, color encoder, synchronization signal addition, etc. are performed, and the final output signal is obtained from the terminal 20.

Here, the operation of the drive address generation circuit 16 will be described in detail. FIG. 3 shows a flowchart of the operation of the drive address generation circuit 16. Note that ST3
01 to ST307 show operation steps. 4 and 5 show specific examples for explaining the operation of the drive address generation circuit 16. FIG.

In the following description, the RSA encryption method is used. In the RSA cryptosystem, assuming that the plaintext is M, the ciphertext is C, the public keys are e and n, and the secret key is d, when encrypting with the public key, the ciphertext C becomes (Equation 1).

[0034]

(Equation 1) At this time, the plaintext M can be decrypted by using the secret key and the equation (2) of the equation (2).

[0035]

(Equation 2) When encrypting with a secret key, the cipher text C is expressed by (Equation 3)
Becomes

[0036]

(Equation 3) At this time, the plaintext M can be decrypted by using the public key and the equation (4) of (Equation 4).

[0037]

(Equation 4) In the following description, it is assumed that the total number of pixels of the image is N, the public key of the photographer A is eA and nA, and the secret key of the photographer is dA. The other party's public key is called eB and nB, and the other party's private key is called dB.

The operation of the drive address generation circuit 16 is as follows. When nA of the public key of the party A and public keys eB and nB of the party B are input from outside similarly to dA which is the secret key of the party A, first, if nA and nB are values larger than the total number N of pixels, It is checked whether it is (Equation (5), ST301).

NA> N and nB> N (nA and nB are not equal) (5) If any one of nA and nB does not satisfy the condition of the above equation (5), the key is reset. (ST3
02).

Next, a one-dimensional temporary address string X determined by nA, nB and N is set as shown in (Equation 5) (ST30).
3).

[0041]

(Equation 5) That is, in general, the addresses of two-dimensional image data are (1, 1), (1, 1) as exemplified in FIGS.
2) A two-dimensional address is used as described above, and it is renumbered by a one-dimensional address. In a very simple manner, a method of assigning a serial number from the upper left corner to the lower right corner on the reproduced image as (1, 2, 3,...) May be used.

Next, using the secret key dA of the photographer A and nA of the public key of the photographer, this address string X is encrypted to obtain an address string Xa (ST304). However, nA <nB
In the case of, (Equation 6) is added to the tail of Xa.

[0043]

(Equation 6) That is, when nA> nB, Xa becomes (Equation 7).

[0044]

(Equation 7) When nA <nB, Xa becomes (Equation 8).

[0045]

(Equation 8) A specific calculation method of Xak is (Equation 9).

[0046]

(Equation 9) In the examples of FIGS. 4 and 5, nA <nB, and (1, 32, 1
2, 4, ..., 19, 50, 51, 52, 53, 5
4) is obtained.

Next, the address string Xa is encrypted using the public keys eB and nB of the user B to obtain the address string XaB (S
T305). That is, when nA> nB, XaB is (Equation 10).

[0048]

(Equation 10) When nA <nB, XaB is (Equation 11).

[0049]

[Equation 11] Where nA> nB and the address value Xak ≧ n in Xa
In the case of B, for example, non-numerical data is stored in the address string XaB.
insert. The specific calculation method of XaB k is (Equation 1)
2).

[0050]

(Equation 12) In the examples of FIGS. 4 and 5, (1, 43, 23, 49,...)
, 6, 13, 37, 54).

Next, the address strings X and XaB are associated with each other.
Then, the numerical value Xk 'of X corresponding to the position of the numerical value in XaB having the same numerical value as Xk in X is arranged at the same position as Xk. By repeating this process, the driving address string XD
Is obtained (ST306).

For example, in FIGS. 4 and 5, the third numerical value of X is X3 = 3, and the value in X corresponding to data having a value of 3 in XaB is 6, ie, XaB6 = 3.
Therefore, the numerical value X6 = 6 is arranged at the third position of XD, and as a result, XD3 = 6. That is, when nA> nB, (Equation 13) holds.

[0053]

(Equation 13) If nA <nB, then (Equation 14).

[0054]

[Equation 14] However, when the numerical value in X corresponding to the numerical value in XaB is larger than N, for example, non-numeric data is put in XD. For example, in FIGS. 4 and 5, XaB50 = 30 in XaB, and the numerical value 50 is larger than the total number of pixels N = 49.
Enter * in the 30th position of D.

When Xk in X satisfies Xk ≧ nB, Xa
Since the numerical value does not exist in B, the same numerical value as Xk is searched from Xa, and the numerical value in X corresponding to the numerical value is arranged at the same position as Xk. In the example of FIGS. 4 and 5, (1, 26, 6,
42,..., 37, 10, 47, *) are obtained.

Then, the address strings X and XD are made to correspond to each other,
The two-dimensional address corresponding to the numerical value in X having the same numerical value as XD k in XD is arranged at the k-th position, and is set as the two-dimensional address when driving the solid-state imaging device 12 (ST307).

For example, since XD3 = 6 in FIGS. 4 and 5, the two-dimensional address corresponding to X6 = 6 (1,
6) is arranged at the third position as a two-dimensional address at the time of driving. In the example of FIG. 4, (1, 1), (4,
5), (1, 6), ..., (2, 3), (7, 5),
* Is obtained.

Of course, non-numeric data "*" cannot be an address, so when * appears in a two-dimensional address, it is skipped and the next address is read. For example, in FIGS. 4 and 5, (2, 1) is followed by (2, 2).
6) will be read. Therefore, the number of two-dimensional addresses at the time of driving eventually has the same value as N.

As described above, the row data and the column data of the drive address of the solid-state image pickup device 12 are obtained, and thereafter, as described above, through the drive circuit 13 of FIG.
Will be driven.

Next, the reordering address generating circuit 1
8 will be described in detail. FIG. 6 shows a flowchart of the operation of the rearrangement address generation circuit 18.
Note that ST601 to ST603 indicate operation steps. 7 and 8 show specific examples for explaining the operation of the reordering address generation circuit 18. FIG. 7 and 8 show N = 49 (the number of vertical pixels and the number of horizontal pixels = 7), eA = 5, nA = 51, and dA =
13, eB = 7, nB = 55, and dB = 3.

First, when a one-dimensional temporary address string X determined by nA, nB and N is set, the following equation (15) is obtained (ST6).
01).

[0062]

(Equation 15) This temporary address string X needs to be the same as X defined by equation (6) of (Equation 5). If both Party A and Party B are very simple (1, 2, 3, ...), there is no need to send the temporary address string X from Party A to Party B.

Next, the above-mentioned address string X is encrypted by using the secret key dB of the party B obtaining the image data from the party A and nB of the public key of the party B to obtain the address string Xb (ST60).
2). However, when nA> nB, (Equation 1)
6) is added.

[0064]

(Equation 16) That is, when nA> nB, (Equation 17) holds.

[0065]

[Equation 17] If nA <nB, then (Equation 18).

[0066]

(Equation 18) A specific calculation method of Xbk is (Equation 19).

[0067]

[Equation 19] In the examples of FIGS. 7 and 8, nA <nB, and (1, 8, 2
7, 9, ..., 46, 28, 47, 54) are obtained.

Next, the address string Xb is encrypted using the instep's public keys eA and nA to obtain the address string XbA (ST
603). That is, when nA> nB, XbA is (Equation 20).

[0069]

(Equation 20) When nA <nB, XbA is (Equation 21).

[0070]

(Equation 21) However, if nA <nB and the address value Xbk in Xb is X
When bk≥nA, for example, non-numerical data is put in XbA. For example, in FIGS. 7 and 8, Xb6 = 51, and this value is equal to nA = 51, so "*" is inserted as the sixth address value of XbA. Also, when the value of Xbk of the calculation result is larger than N, for example, “*” is inserted. A specific calculation method of XbA k is (Equation 22).

[0071]

(Equation 22) In the examples of FIGS. 7 and 8, (1, 26, 6, 42,...,
37, 10, 47, *) are obtained. This value is equal to the driving one-dimensional address XD in FIGS.

Next, the XbA address value is converted into a two-dimensional address value. Assuming that agreement has been reached between Party A and Party B regarding the number of vertical pixels and the number of horizontal pixels of the image, the correspondence between the one-dimensional temporary address and the original two-dimensional address is as shown in FIGS. Therefore, a two-dimensional address corresponding to a value in X having an address value equal to the value of XbA is obtained.

For example, since the fourth address value of XbA in FIGS. 7 and 8 is XbA4 = 42, the two-dimensional address corresponding to X42 = 42 in X having the same 42 is shown in FIGS.
From the two-dimensional address of (6, 7).

In the examples of FIGS. 7 and 8, two-dimensional address values (1, 1), (4, 5), (1, 6),.
3), (7,5), * are obtained. Non-numerical data "*", which cannot be an actual address value, is inserted into these values due to the above calculation. When this is removed, a final two-dimensional address string for rearrangement is obtained.

As can be seen from FIGS. 7 and 8, the rearrangement two-dimensional address value as the calculation result is
It can be understood that the output data is equal to the two-dimensional address value.

With the above operation, the pixel order of the image data input to the data rearranging circuit 17 of FIG. 1 and the order of the output address values of the rearranging address generating circuit 18 coincide with each other. In, the image data can be rearranged so as to match the spatial arrangement of each pixel on the solid-state imaging device 12.

As described above, in the above-described embodiment, the order of the data of each pixel is encrypted at the stage of output from the solid-state imaging device where the video signal is first obtained in the imaging system. Data confidentiality increases. Since the RSA encryption method is used, even if third parties other than Party A and Party B obtain this image data, they must, of course, obtain Party B's private key (Public Party A's public key is available. It is assumed that it is virtually impossible to return to the original pixel order.

Further, the secret key of the instep is used at the time of encryption,
And only the Party A manages the Party's private key,
If a meaningful image is obtained by a formal decryption method, the source of the image data can be electronically authenticated.

In the above-described embodiment, the explanation has been made on the assumption that the number of horizontal pixels and the number of vertical pixels of the image are mutually understood between the parties A and B. Also, the description has been made on the assumption that both the first party and the second party use a natural number sequence (1, 2, 3, 4,...) Starting from 1 for the one-dimensional provisional address sequence X.

However, if these are not mutually confirmed, it is necessary to transmit them separately from the image data (encrypted if necessary) from Party A to Party B.

In such a case, for example, when a sequence other than simple (1, 2, 3, 4,...) Is set as the one-dimensional temporary address sequence, even if a third party adds to the image data, Even if you obtain your private key, it is difficult to say that it is almost impossible to decode meaningful image data unless you know the one-dimensional temporary address string that is the starting point of decryption.

Further, in the above-described embodiment, at the time of encryption, the party's public key eB,
It has been described that nB is used, and that the public keys eA and nA are used after the private key dB and the public key nB of the party B so as to correspond to the decryption. However, the order of key use may be reversed. In other words, at the time of encryption, your public key eB, n
The private key dA and the public key nA are used after B, and the private key dB and public key nB are used after the public key eA and nA, respectively.

FIG. 9 shows the configuration of an image pickup system according to a second embodiment of the present invention. The same components as those in FIG. 1 are denoted by the same reference numerals, and detailed description thereof will be omitted. Here, the description will be focused on the parts different from FIG.

In FIG. 1, the object to be encrypted has been described as an order for each pixel. However, the present invention is not limited to this, and the order may be encrypted for mutually adjacent pixel blocks within a certain range.

That is, a total of 8 of 4 rows × 2 columns adjacent to each other
The pixels are considered as one unit, and the order between the blocks is encrypted.

At this time, if the basic repetition unit of the color filter array on the solid-state imaging device 12 is the same 4 rows × 2 columns as described above, even before the data rearrangement circuit 17 returns to the original order, for example, the A / D converter 15 The video signal processing circuit 31 described after can also perform the color separation processing.

After the color separation processing, part of the processing in the amplitude direction of the video signal such as gamma correction can also be performed in the video signal processing circuit 31. Also, data compression processing and the like can be performed. Then, the remaining processing (color encoder, synchronization signal addition, etc.) is performed by the video signal processing circuit 19.

In FIG. 1, since almost all of the signal processing is performed in the video signal processing circuit 19, the circuit scale of this part is large. However, in FIG. 9, the signal processing is distributed to two blocks. There is also a feature that the load on the image data display side is reduced accordingly.

The present invention is not limited to the public key cryptosystem, but simply changes the driving order of the XY address type solid-state imaging device from the original order using the key information, and converts the received image data using the key information. Any imaging system that restores the original order can be used.

The solid-state imaging device is not limited to the XY address type solid-state imaging device 12, but may be any solid-state imaging device in which the reading order of each pixel can be arbitrarily changed.

[0091]

As described in detail above, according to the present invention, the order of the data of each pixel is encrypted at the stage of output from the solid-state imaging device where the video signal is first obtained in the imaging system, The confidentiality of the image data increases.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating a configuration of a first embodiment of an imaging system according to the present invention.

FIG. 2 is a diagram for explaining a schematic configuration of an XY address type solid-state imaging device used in first and second embodiments of the imaging system of the present invention.

FIG. 3 is a flowchart for explaining an operation of the drive address generation circuit 16 of FIG. 1;

FIG. 4 is a specific example diagram for explaining an operation of the drive address generation circuit 16 of FIG. 1;

FIG. 5 is a specific example diagram for explaining the operation of the drive address generation circuit 16 of FIG. 1;

FIG. 6 is a flowchart for explaining the operation of the reordering address generation circuit 18 of FIG. 1;

FIG. 7 is a specific example diagram for explaining the operation of the reordering address generation circuit 18 of FIG. 1;

FIG. 8 is a specific example diagram for explaining the operation of the reordering address generation circuit 18 of FIG. 1;

FIG. 9 is a block diagram illustrating a configuration of an imaging system according to a second embodiment of the present invention.

[Explanation of symbols]

11: imaging lens, 12: XY address type solid-state imaging device, 13: drive circuit, 14: preamplifier circuit, 15: analog / digital (A / D) converter, 16 ... A drive address generation circuit, 17 ... a data rearrangement circuit, 18 ... a rearrangement address generation circuit, 19, 31 ... a video signal processing circuit,

Claims (5)

[Claims] In an imaging system using a solid-state imaging device in which the reading order of each pixel can be arbitrarily changed, each pixel of the solid-state imaging device is inputted by inputting first key information in an encryption method. The driving order of the pixels is changed from the original order to the encrypted order, and the output order of each pixel of the solid-state imaging device can be arbitrarily changed. 2. When displaying the received image data,
2. The imaging apparatus according to claim 1, wherein the first or second key information in the encryption method is input to decrypt the order of each pixel of the received image data and return the order to the original order. 3. system. 3. An imaging system using a solid-state imaging device in which the reading order of each pixel can be arbitrarily changed. In the imaging system, first key information in an encryption method is input at the time of photographing, so that the solid-state imaging device When the driving order of each pixel is encrypted to output image data in which the output order of each pixel of the solid-state imaging device is encrypted, and the image data is displayed, the first or second encryption method is used. An imaging system, wherein the order of each pixel of the image data encrypted by inputting key information is decrypted and returned to the original order. 4. A solid-state imaging device in which a reading order of each pixel can be arbitrarily changed; a driving address generation unit that defines a driving order of each pixel of the solid-state imaging device; and a driving output by the driving address generation unit. Driving means for driving the solid-state imaging device in accordance with the order of addresses; and reordering the order of each pixel of the image data so as to be different from the order of each pixel of the image data output from the solid-state imaging device. A data rearrangement unit for returning to an original pixel order so as to correspond to a spatial arrangement of each pixel of the device; and a rearrangement address generation unit for generating an address for the rearrangement, and driving the solid-state imaging device. At this time, the drive address generating means encrypts the drive address by inputting first key information in an encryption system, and encrypts the drive address. The driving means drives the solid-state imaging device in accordance with the sequence of the converted drive addresses, and the reordering address generation means generates an image received by inputting the first or second key information in an encryption system. A rearranging address is generated so as to correspond to the order of each pixel of data, and the data rearranging means returns the image data received using the rearranging address to the original pixel order. system. 5. A color solid-state imaging device in which the reading order of each pixel can be arbitrarily changed; a driving address generation unit for defining a driving order of each pixel of the solid-state imaging device; and the driving address generation unit. Driving means for driving the solid-state imaging device according to the order of the driving address to be output, and rearranging the order of each pixel of the image data so as to be different from the order of each pixel of the image data output from the solid-state imaging device, Data rearranging means for returning to the original pixel order so as to correspond to the spatial arrangement of each pixel of the solid-state imaging device; rearranging address generating means for generating an address for the rearrangement; the solid-state imaging device and the data A first video signal processing unit that exists in a path between the rearranging units and performs video signal processing on the image data; A second video signal processing unit that is present in a path behind the switching unit and performs a video signal process for outputting a reproduced image, wherein the drive address generation unit is used when the solid-state imaging device is driven. When the first key information in the encryption system is input, the drive address is encrypted, and the plurality of pixel groups adjacent to each other on the solid-state imaging device are set as one unit, and the drive unit performs the encryption. The readout order between the pixel groups of the one unit of the solid-state imaging device is encrypted in accordance with the order of the drive addresses, and image data is output. The first signal processing unit outputs the image data in the pixel group of the solid-state imaging device. Using the output image data, the color signal separation and the compression operation of the amount of image information are performed, and the rearrangement address generation means receives the first or second key information in the encryption system. Then, a rearrangement address is generated so as to correspond to the order of each pixel of the received image data, and the data rearrangement means returns the image data received using the rearrangement address to the original pixel order. An imaging system, wherein the second video signal processing means performs video signal processing for outputting a reproduced image.