CN111345768A - Picture integrity checking method, communication device and capsule endoscope system - Google Patents
Picture integrity checking method, communication device and capsule endoscope system Download PDFInfo
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- A61B1/00002—Operational features of endoscopes
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Abstract
The invention discloses a picture integrity checking method, a communication device and a capsule endoscope system. The method comprises the following steps: s1, the sending end divides the picture to be sent into a plurality of data packets, verifies all or part of the content of each data packet through a first algorithm, and places all or part of the obtained verification result as a first verification value of the whole picture at a position appointed by the receiving end in the picture to be sent; and S2, the receiving terminal reconstructs the picture based on the data packets, verifies the content of each data packet in the reconstructed picture according to the same algorithm and sequence as those of the sending terminal, obtains a second verification value, compares whether the second verification value is the same as the first verification value, and if so, considers that the picture data is complete. The method not only checks the content in each data packet, but also checks the combination and combination sequence of the data packets, thereby effectively avoiding screen waste caused by wrong combination and combination sequence of the data packets and improving the image display quality of a receiving end.
Description
Technical Field
The invention relates to the technical field of endoscopes, in particular to a picture integrity checking method, a communication device and a capsule endoscope system.
Background
The capsule endoscopy system takes data packets as units in wireless transmission picture information, and error code verification is generally carried out on each data packet by adopting a data verification method, so that the data correctness and integrity of each data packet are ensured. However, in practical applications, a picture is formed by combining a plurality of data packets, and even though the data verification method of wireless transmission can ensure that each data packet codeword is correct, if a receiving end makes a mistake in the process of combining a plurality of data packets into a picture, for example, if a data packet of a previous picture is mixed into a current picture, the data packet of the previous picture still affects the recombination of the current picture, so that a screen is formed.
Chinese patent publication No. CN106725260A in the prior art discloses a buffer type endoscopic capsule working system, which includes an image acquisition module and a data verification module, where the image acquisition module includes a mark encoding unit for attaching sequence marks to image data packets in a certain order, and the data verification module includes a judgment processing unit for reading the sequence marks of the acquired image data packets, and obtaining information about whether the image data packets are complete or not by judging the continuity of the sequence marks. However, the patent cannot exclude that the data packets which have the same sequence marks and belong to different pictures interfere and affect the data packet recombination of the pictures, so that the integrity detection of the pictures has a leak, and meanwhile, the sequence marks are added into each data packet to increase the length of the data packet, increase the data transmission amount and reduce the real-time performance of the system.
Disclosure of Invention
The invention aims to at least solve the technical problems in the prior art, and particularly innovatively provides a picture integrity checking method, a communication device and a capsule endoscope system.
In order to achieve the above object of the present invention, according to a first aspect of the present invention, there is provided a picture integrity checking method comprising:
s1, the sending end divides the picture to be sent into a plurality of data packets, verifies all or part of the content of each data packet through a first algorithm, and places all or part of the obtained verification result as a first verification value of the whole picture at a position appointed by the receiving end in the picture to be sent; sending each data packet to a receiving end;
s2, the receiving end receives each data packet and takes out the first check value from the appointed position, based on the data packet restructuring picture, the content of each data packet in the restructuring picture is checked according to the same algorithm and sequence as the sending end to obtain a second check value, whether the second check value is the same as the first check value or not is compared, if so, the picture data is considered to be complete, and if not, the picture data is considered to be incomplete.
The beneficial effects of the above technical scheme are: the method not only checks the content in each data packet, but also checks the combination and combination sequence of the data packets, thereby effectively avoiding screen splash caused by wrong combination and/or combination sequence of the data packets and improving the image display quality of the receiving end.
In a preferred embodiment of the present invention, the first algorithm in S1 is: and sequentially carrying out accumulation binary XOR calculation on all bits of each data packet or at least one bit of a fixed position, and taking all or part of the obtained calculated value as a first check value.
The beneficial effects of the above technical scheme are: the check algorithm is provided, one or more bits at a fixed position in a first data packet are aligned with one or more bits at a fixed position in a second data packet, each bit is subjected to binary XOR operation, an obtained result is aligned with one or more bits at a fixed position in a third data packet, and the binary XOR operation is carried out until the binary XOR calculation of all the data packets is completed.
In a preferred embodiment of the present invention, the first algorithm in S1 is: and sequentially combining all bits of each data packet or at least one bit of the intercepted fixed position into new data, carrying out encryption operation on the new data, and taking all or part of the obtained calculated value as a first check value.
The beneficial effects of the above technical scheme are: all or part of the calculated value obtained through encryption operation is used as the first check value, so that the confidentiality of the picture is improved.
In a preferred embodiment of the invention, a binary code sequence of a partial width of the calculated value is truncated as the first check value.
The beneficial effects of the above technical scheme are: the data sending amount is reduced, and the picture sending efficiency is improved.
In a preferred embodiment of the present invention, in S1, the sending end divides the picture to be sent into a plurality of data packets according to rows and columns;
in S1, the control end checks all or part of the content of each data packet according to the sequence from the bottom to the top of the picture to be sent and from the left to the right of the picture to be sent through a first algorithm;
in S2, the receiving end checks all or part of the contents of each packet in order from the bottom to the top of the recomposed picture and from the left to the right of the recomposed picture through the first algorithm.
The beneficial effects of the above technical scheme are: the pictures are divided according to rows and columns, the space habit is met, all the data packets in the pictures are verified according to a specific sequence, and the sequence accords with the habit of picture processing and is convenient for quick processing.
In a preferred embodiment of the present invention, the appointed position is a head or a tail of a first data packet or a last data packet of a picture to be transmitted.
The beneficial effects of the above technical scheme are: the receiving end can conveniently and quickly take out the first check value.
In a preferred embodiment of the present invention, the S1 further includes a step in which the sending end checks each data packet based on a second algorithm and places an obtained second check value in the corresponding data packet;
the S2 further includes the step of the receiving end checking the content of the data packet based on the second check value of the data packet.
The beneficial effects of the above technical scheme are: the integrity of the contents of each packet is ensured.
In a preferred embodiment of the present invention, the method further comprises the step of discarding the picture from receiving the data packet of the next picture when the picture data is considered to be incomplete.
The beneficial effects of the above technical scheme are: and incomplete pictures are removed, and the problems of screen splash and the like caused by the incomplete pictures are avoided.
In order to achieve the above object, according to a second aspect of the present invention, there is provided a communication apparatus, including a transmitting end and a receiving end for wireless communication, where the transmitting end and the receiving end perform picture integrity check according to any one of the above picture integrity check methods.
The beneficial effects of the above technical scheme are: the method has the beneficial effect of the picture integrity checking method.
In order to achieve the above object, according to a third aspect of the present invention, there is provided a capsule endoscope system comprising a capsule endoscope and a recorder, wherein the capsule endoscope comprises a first controller and a first communication unit, the recorder comprises a second controller and a second communication unit which wirelessly communicates with the first communication unit, the capsule endoscope system is characterized in that the first controller transmits a data packet via the first communication unit after processing picture data to be transmitted according to step S1 in any one of the above picture integrity check methods, and the second communication unit receives the data packet and transmits the data packet to the second controller;
the second controller reassembles the received packets into a picture according to step S2 in any of the above-mentioned picture integrity checking methods, and determines the integrity of the reassembled picture.
The beneficial effects of the above technical scheme are: besides the beneficial effect of the picture integrity checking method, the recorder in the system checks the integrity of the picture recombined based on the received data packet, can check out incomplete pictures caused by data packet recombination errors, such as incompleteness caused by mixing of data packets of other pictures into the recombined picture, or incompleteness of the recombined picture caused by non-aligned data packet combination sequence, and avoids screen splash phenomenon caused by displaying the incomplete picture.
Drawings
FIG. 1 is a flowchart illustrating a method for verifying integrity of pictures according to an embodiment of the present invention;
FIG. 2 is a flow chart of the prior art when there is a combination problem in the picture integrity check;
FIG. 3 is a system block diagram of a capsule endoscopic system in accordance with an embodiment of the present invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
In the description of the present invention, it is to be understood that the terms "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be construed as limiting the present invention.
In the description of the present invention, unless otherwise specified and limited, it is to be noted that the terms "mounted," "connected," and "connected" are to be interpreted broadly, and may be, for example, a mechanical connection or an electrical connection, a communication between two elements, a direct connection, or an indirect connection via an intermediate medium, and specific meanings of the terms may be understood by those skilled in the art according to specific situations.
The invention discloses a picture integrity checking method, the flow general diagram of which is shown in figure 1, and the method specifically comprises the following steps:
s1, the sending end divides the picture to be sent into a plurality of data packets, verifies all or part of the content of each data packet through a first algorithm, and places all or part of the obtained verification result as a first verification value of the whole picture at a position appointed by the receiving end in the picture to be sent; sending each data packet to a receiving end;
s2, the receiving end receives each data packet and takes out the first check value from the appointed position, based on the data packet restructuring picture, the content of each data packet in the restructuring picture is checked according to the same algorithm and sequence as the sending end to obtain a second check value, whether the second check value is the same as the first check value or not is compared, if so, the picture data is considered to be complete, and if not, the picture data is considered to be incomplete.
In this embodiment, the sending end may divide the picture into a plurality of data packets according to rows, columns, or rows and columns, and preferably, each data packet includes data of an integer multiple of pixel points, for example, 1 pixel point corresponds to one data packet.
In this embodiment, when the first algorithm is used to verify the packets of the pictures to be sent, the order should be sequential, and the order may be according to the sending order of the packets, and preferably is a spatial order of the pictures, such as a customized spatial order from left to right of the pictures, or from bottom to top, etc., to verify the packets arranged in the pictures. The first algorithm is also required to be used to check each data packet of the reconstructed picture in the same order at the receiving end.
In the present embodiment, the first algorithm may preferably be an encryption algorithm, such as MD5 algorithm; or some accumulatible binary code operations, such as simple logic operations like exclusive-or operation, nor operation, etc.; it is also possible to perform an accumulation addition operation or an accumulation subtraction operation, i.e. the first check value is preferably obtained by checking all or part of the contents of all packets in order.
In this embodiment, to reduce the amount of calculation, part of the content in the data packet may be checked, such as checking the first half, middle part or second half of each data packet, and preferably several bits can be checked.
In this embodiment, preferably, the appointed position is a head or a tail of a first data packet or a last data packet of a picture to be transmitted.
Fig. 2 shows a flowchart of the conventional picture integrity check when there is a combination problem, in the prior art, the content of each Packet is usually checked at the sending end, for example, crc check value is obtained by crc check, Packet 1(Packet1) obtains check value crc1, Packet 2(Packet2) obtains check value crc2, and Packet n (Packet _ n) obtains check value crc _ n. And after receiving the data packets, the receiving end recombines the data packets to obtain a recombined picture, and checks whether the content in each data packet in the recombined picture corresponds to the crc check value, if so, the content of the data packet is considered to be correct, and the data of the recombined picture is complete. Obviously, the above reorganization picture integrity checking process has at least the following problems: firstly, the data packets of other pictures (for example, Packet3 of the previous picture is regarded as Packet3 of the recomposed picture) are mixed into the recomposed picture; secondly, the data packets of the recombined picture are in wrong arrangement sequence, for example, the data packets are combined into a Packet1, a Packet3 and a Packet2 by the sequence errors of the Packet1, the Packet2 and the Packet3, when the problems occur, the integrity inspection method in the prior art cannot detect the problems, and the problem of screen omission is caused.
Preferably, the step of discarding the packet of the picture to receive the packet of the next picture when the picture data is considered to be incomplete.
In a preferred embodiment of the present invention, the first algorithm in S1 is: and sequentially carrying out accumulation binary XOR calculation on all bits of each data packet or at least one bit of a fixed position, and taking all or part of the obtained calculated value as a first check value.
In this embodiment, to reduce the amount of calculation, or when the data packet is more, the bits at fixed positions may be selected to perform the cumulative binary xor calculation, such as the first 4 bits, the first 5 bits, or the first 10 bits of each fixed data packet, or the last 5 bits, or the last 6 bits of each fixed data packet; according to a set data packet inspection sequence, after the fixed position bit of a first data packet is aligned with the fixed position bit of a second data packet one by one, an exclusive-or operation is carried out, each bit exclusive-or operation result is used as a calculation code of the bit, all calculation codes form a first calculation value, the calculation value is aligned with the bit of the fixed position of a third data packet one by one according to the same method, then the exclusive-or operation is carried out until the last data packet is operated, and all or part of bits (the front part or the rear part and the like can be selected) of the finally obtained calculation value are used as a first check value.
In a preferred embodiment of the present invention, the first algorithm in S1 is: and sequentially combining all bits of each data packet or at least one bit of the intercepted fixed position into new data, carrying out encryption operation on the new data, and taking all or part of the obtained calculated value as a first check value.
In the present embodiment, the encryption algorithm is preferably, but not limited to, md5 algorithm or hash algorithm.
In a preferred embodiment of the invention, a binary code sequence of a partial width of the calculated value is truncated as the first check value.
In this embodiment, a binary code sequence of three or four bits may be selected as the first check value.
In a preferred embodiment of the present invention, in S1, the sending end divides the picture to be sent into a plurality of data packets according to rows and columns;
in S1, the control terminal checks all or part of the contents of each data packet according to the sequence from the bottom to the top of the picture to be sent and from the left to the right of the picture to be sent by using the first algorithm;
in S2, the receiving end verifies all or part of the contents of each packet in order from the bottom to the top of the recomposed picture and from the left to the right of the recomposed picture through the first algorithm.
In a preferred embodiment of the present invention, S1 further includes a step in which the sending end checks each data packet based on a second algorithm and places an obtained second check value in the corresponding data packet;
s2 further includes the step of the receiving end checking the content of the data packet based on the second check value of the data packet.
In the present embodiment, the second algorithm is preferably, but not limited to, a CRC check algorithm or a parity check algorithm.
The invention also discloses a communication device, which comprises a sending end and a receiving end of wireless communication, wherein the sending end and the receiving end carry out picture integrity check according to the picture integrity check method.
The invention also discloses a capsule endoscope system, the system block diagram of which is shown in fig. 3, comprising a capsule endoscope and a recorder, wherein the capsule endoscope comprises a first controller and a first communication unit, the recorder comprises a second controller and a second communication unit which is in wireless communication with the first communication unit, the first controller processes the picture data to be sent according to the step S1 in any picture integrity checking method and then sends a data packet through the first communication unit, and the second communication unit receives the data packet and transmits the data packet to the second controller;
the second controller reassembles the received packets into a picture according to step S2 in any of the above-mentioned picture integrity checking methods, and determines the integrity of the reassembled picture.
In this embodiment, the first controller and the second controller are preferably processors such as MCU and a single chip, and the first communication unit and the second communication unit preferably communicate with each other through WIFI.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (10)
1. A picture integrity checking method is characterized by comprising the following steps:
s1, the sending end divides the picture to be sent into a plurality of data packets, verifies all or part of the content of each data packet through a first algorithm, and places all or part of the obtained verification result as a first verification value of the whole picture at a position appointed by the receiving end in the picture to be sent; sending each data packet to a receiving end;
s2, the receiving end receives each data packet and takes out the first check value from the appointed position, based on the data packet restructuring picture, the content of each data packet in the restructuring picture is checked according to the same algorithm and sequence as the sending end to obtain a second check value, whether the second check value is the same as the first check value or not is compared, if so, the picture data is considered to be complete, and if not, the picture data is considered to be incomplete.
2. The picture integrity checking method according to claim 1, wherein the first algorithm in S1 is: and sequentially carrying out accumulation binary XOR calculation on all bits of each data packet or at least one bit of a fixed position, and taking all or part of the obtained calculated value as a first check value.
3. The picture integrity checking method according to claim 1, wherein the first algorithm in S1 is: and sequentially combining all bits of each data packet or at least one bit of the intercepted fixed position into new data, carrying out encryption operation on the new data, and taking all or part of the obtained calculated value as a first check value.
4. The picture integrity checking method according to claim 2 or 3, characterized in that a binary code sequence of a partial width of the calculated value is truncated as the first check value.
5. The picture integrity checking method according to claim 1, wherein in S1, the sending end divides the picture to be sent into a plurality of data packets by rows and columns;
in S1, the control end checks all or part of the content of each data packet according to the sequence from the bottom to the top of the picture to be sent and from the left to the right of the picture to be sent through a first algorithm;
in S2, the receiving end checks all or part of the contents of each packet in order from the bottom to the top of the recomposed picture and from the left to the right of the recomposed picture through the first algorithm.
6. The picture integrity checking method of claim 1, wherein the approximate location is a header or a trailer of a first packet or a last packet of a picture to be transmitted.
7. The picture integrity checking method according to claim 1, wherein the S1 further includes a step in which the sender checks each data packet based on a second algorithm and places an obtained second check value in the corresponding data packet;
the S2 further includes the step of the receiving end checking the content of the data packet based on the second check value of the data packet.
8. The picture integrity checking method as claimed in claim 1, further comprising the step of discarding the picture from receiving the data packet of the next picture if the picture data is considered to be incomplete.
9. A communication apparatus comprising a transmitting end and a receiving end for wireless communication, wherein the transmitting end and the receiving end perform picture integrity check according to the picture integrity check method of any one of claims 1 to 8.
10. A capsule endoscope system comprising a capsule endoscope and a recorder, the capsule endoscope comprising a first controller and a first communication unit, the recorder comprising a second controller and a second communication unit which wirelessly communicates with the first communication unit, wherein the first controller transmits a data packet via the first communication unit after processing picture data to be transmitted according to step S1 in the picture integrity checking method according to any one of claims 1 to 8, and the second communication unit receives the data packet and transmits it to the second controller;
the second controller reassembles the received packets into a picture and determines the integrity of the reassembled picture according to step S2 in the picture integrity checking method according to any one of claims 1 to 8.
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| CN116302224A (en) * | 2021-12-21 | 2023-06-23 | 青岛国创智能家电研究院有限公司 | Interface switching method and device for RTOS system, terminal equipment and storage medium |
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| CN108720795A (en) * | 2018-06-21 | 2018-11-02 | 重庆金山医疗器械有限公司 | A kind of data can search capsule endoscope system and the compensation method of compensation |
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