CN118138773A - Image communication device, method and computer readable storage medium - Google Patents
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Abstract
An image communication apparatus, method and computer readable storage medium. The application discloses a technical scheme for realizing the acquisition and decoding display of ultra-wide pictures by performing two-dimensional matrix transformation, rotation and transformation on a transverse image shot by an image shooting component into a longitudinal image, reducing the width of the image, reducing the requirement on the maximum decoding width of a decoding component, and avoiding the limitation of the display width of the decoding image of equipment; one of the problems to be solved is that when the image width (Wi) acquired and encoded by the IPC is greater than the maximum image width (Wn) decoded by the NVR and the image height (Hi) acquired and encoded by the IPC is less than the maximum image width (Wn) decoded by the NVR, the IPC acquires encoded image data, and decoding and displaying cannot be performed on the NVR.
Description
Technical Field
The present application relates to the field of image transmission technology, and more particularly, to an image communication apparatus, method, and computer-readable storage medium.
Background
One monitoring system that is currently common is a combination of ipc+nvr types. NVR (network video recorder), namely Network Video Recorder, is a storage and preview part of a network video monitoring system, and the NVR and IPC (network video camera) work cooperatively to complete video recording, storage and forwarding functions. IPC (internet protocol CAMERA), which is a new generation of CAMERAs produced by combining conventional CAMERAs with network technology, can transmit video images to the other end of the earth through the network. The network camera generally comprises a lens, an image sensor, a sound sensor, a signal processor, an A/D converter, a coding chip, a main control chip, a network, a control interface and the like. The coding chip module codes and compresses the analog video signals acquired by the analog video camera into digital signals, so that the digital signals can be directly accessed into network switching, routing equipment or NVR. When the NVR receives the coded and compressed digital signal, the NVR decodes the coded and compressed digital signal, and converts the decoded digital signal into a displayable analog signal or digital signal and the like. Finally, real-time picture viewing is realized on the NVR. Most image acquisition modules in the market are used for transversely acquiring the original image during the production process. The mainstream IPC image coding scheme also encodes image pixels laterally. The decoding mode of the NVR is determined by the image coding mode of the IPC, and if the IPC image coding mode is pixel transverse coding, the NVR decodes according to the transverse mode to restore the image. If the IPC image coding mode is pixel vertical coding, the NVR decodes according to the vertical mode to restore the image.
The image encoding and decoding module in the current IPC+NVR system limits the width of the image due to the consideration of cost, and the pixel width of each row is more strictly limited when the acquired image is encoded or the stored image is decoded. In addition, when the IPC and the NVR require the width of the image, for example, the IPC may encode an image with an image width of 1000, and the NVR decodes compressed image data with a maximum width of 800, so that the image data with an image width of 1000 collected by the IPC cannot be decoded and restored to an image with a width of 1000 on the NVR after encoding.
Disclosure of Invention
The application provides an image communication device, an image communication method and a computer readable storage medium.
First, the present application proposes an image communication apparatus including:
an imaging section for capturing a lateral image suitable for a lateral display section having a longer lateral direction than a longitudinal direction in a display area;
A first conversion unit configured to convert pixel data of the horizontal image into pixel data of a vertical image by two-dimensional matrix conversion rotation, the vertical image being suitable for display on a vertical display unit having a longer vertical direction than the horizontal direction in a display area;
an encoding section that encodes pixel data of a vertical image;
And a transmitting section that transmits the encoded data; the encoded data is decoded by a decoding section.
Wherein the lateral image height is not greater than the maximum decoding width of the decoding means.
In one embodiment, the image capturing section, the first transforming section, the encoding section, and the transmitting section are located within a network camera.
The application provides an image communication device, which comprises a receiving part for receiving coded data; a decoding unit for decoding pixel data of the encoded longitudinal image, wherein the longitudinal image is formed by converting and rotating a transverse image through a two-dimensional matrix; a second conversion section performing an inverse operation of the two-dimensional matrix conversion on the pixel data of the decoded vertical image, the inverse operation being rotationally converted into pixel data of the horizontal image; a display section that displays pixel data of an image that has been decoded; wherein the lateral image height is not greater than the maximum decoding width of the decoding means.
In one embodiment, the receiving means, decoding means, display means and second transforming means are located within a network video recorder; the network video recorder is in signal connection with the network camera.
In one embodiment, the display component comprises a liquid crystal display or a plasma display.
Second, the present application proposes an image communication method including:
capturing a lateral image suitable for display on a lateral display member having a longer lateral direction than a longitudinal direction of the display area;
converting the pixel data of the transverse image into pixel data of a longitudinal image through two-dimensional matrix conversion rotation, wherein the longitudinal image is suitable for displaying a longitudinal display part with longitudinal length longer than transverse length in a display area;
Encoding pixel data of the longitudinal image;
Transmitting the encoded data;
Wherein the lateral image height is not greater than the maximum decoding width when decoding the encoded data.
An image communication method further comprising receiving encoded data; decoding the pixel data of the encoded longitudinal image; performing the inverse operation of the two-dimensional matrix transformation on the decoded pixel data of the longitudinal image, and rotating and transforming the pixel data into pixel data of the transverse image; and displaying pixel data of the decoded image, wherein the lateral image height is not greater than the maximum decoding width when decoding the encoded data.
In one embodiment, the image communication method further includes attaching a flag indicating whether rotation restoration is required to the encoded data, after decoding, determining whether to perform an inverse operation of two-dimensional matrix conversion according to the rotation flag before the display operation, and rotationally converting the pixel data of the decoded vertical image into the pixel data of the horizontal image.
Third, the present application proposes a computer-readable storage medium storing any one of the aforementioned image communication methods of any one of the aforementioned image communication apparatuses.
According to the technical scheme, the transverse image shot by the shooting component is subjected to two-dimensional matrix transformation and rotation transformation to be a longitudinal image, so that the width of the image is reduced, the requirement on the maximum decoding width of the decoding component is reduced, the limitation of the display width of the decoding image of equipment is avoided, and the functions of collecting and decoding display of ultra-wide pictures are realized; one of the problems to be solved is that when the image width (Wi) acquired and encoded by the IPC is greater than the maximum image width (Wn) decoded by the NVR and the image height (Hi) acquired and encoded by the IPC is less than the maximum image width (Wn) decoded by the NVR, the IPC acquires encoded image data, and decoding and displaying cannot be performed on the NVR.
Drawings
The foregoing and/or additional aspects and advantages of the present application will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings, in which:
Fig. 1 is a schematic configuration diagram of an image communication apparatus of the present embodiment;
FIG. 2 is a schematic view of a lateral image of the present embodiment;
FIG. 3 is a longitudinal image schematic of the present embodiment corresponding to FIG. 2;
FIG. 4 is a schematic diagram of two-dimensional matrix transformation from a landscape image to a portrait image according to the present embodiment;
Fig. 5 is a schematic diagram of an image communication apparatus of embodiment 2 of the present application;
Fig. 6 is a network camera and a network video according to embodiment 3 of the present application
A schematic diagram of a video recorder;
fig. 7 is a schematic diagram of a communication device and a mobile terminal of an image communication apparatus of embodiment 4 of the present application;
Fig. 8 is a schematic diagram of an image communication method of embodiment 5 of the present application;
fig. 9 is a schematic diagram of an image communication method of embodiment 6 of the present application;
Fig. 10 is a schematic diagram of an image communication method of embodiment 7 of the present application;
fig. 11 is a schematic diagram of an image communication method of embodiment 8 of the present application.
Detailed Description
Embodiments of the present application are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The examples described below by referring to the drawings are illustrative only for explaining embodiments of the present application and are not to be construed as limiting the inventive concept of the present application.
In embodiment 1, fig. 1 is a schematic structural diagram of an image communication device according to the present embodiment, fig. 2 is a schematic transverse image according to the present embodiment, fig. 3 is a schematic longitudinal image according to the present embodiment corresponding to fig. 2, and fig. 4 is a schematic two-dimensional matrix conversion diagram of converting a transverse image according to the present embodiment into a longitudinal image.
An image communication apparatus comprising:
an imaging section 101 for capturing a lateral image suitable for a lateral display section having a longer lateral direction than a longitudinal direction in a display area; a first conversion unit 102 for rotationally converting pixel data of the horizontal image into pixel data of a vertical image by two-dimensional matrix conversion, the vertical image being suitable for a vertical display unit having a longer vertical direction than the horizontal direction in a display area; FIG. 4 is a schematic diagram of a two-dimensional matrix transformation process for rotating pixel data of a lateral image to pixel data of a longitudinal image by two-dimensional matrix transformation, implementing the rotations of FIGS. 2-3; specific transcoding references: x1=int (input ('please input list length:'))
An encoding section 103 that encodes pixel data of a vertical image; and a transmitting section 104 that transmits the encoded data. The first transformation unit 102 rotates the transverse image actually captured by the imaging unit 101 into a longitudinal image by two-dimensional matrix transformation, and encodes and transmits the longitudinal image. Since the width of the lateral image is larger than the height, if the lateral image is directly encoded, the lateral image may not be analyzed due to the limitation of the decoding part on the width during decoding; and after rotation, the horizontal image is converted into the vertical image, so that the requirement on the width direction decoding capability of the decoding component is reduced. The encoding unit 103 performs compression processing on the image data of the vertical image obtained after the rotation conversion by the first conversion unit 102. The transmitting section 104 transmits the data encoded by the encoding section 103 to a subsequent processing program or apparatus by wired or wireless.
As can be readily appreciated, as shown in fig. 2, the X-direction is the width direction of the image and the Y-direction is the height direction of the image. The horizontal image refers to an image having a width larger than a height, and the vertical image refers to an image having a width smaller than a height.
The application solves the problems that the width of the decoding part is limited, and the current main stream of the imaging part shoots transverse images, and the application is applicable to the situation that the decoding part is limited in the height direction of the imaging part shooting longitudinal images. At this time, the first conversion section may convert the portrait image into a landscape image, and the subsequent transmission and reception procedures are the same, and the second conversion section may convert the landscape image into a portrait image.
The image data may be compressed using an image coding scheme such as h.264 or MPEG 4. It is easy to understand that, no matter what kind of encoding rule is adopted, in order to enable smooth decoding, the corresponding rule is adopted for decoding.
In embodiment 2, as shown in fig. 5, which is a schematic diagram of the image communication apparatus of the present embodiment, the same reference numerals are given to the same parts as those of the other embodiments in the present embodiment, and the description thereof is omitted.
The image communication apparatus further includes a receiving section 201, the receiving section 201 receiving the encoded data through a wired or wireless transmission line; a decoding section 202 that decodes pixel data of the encoded vertical image based on the same rule as the encoding; the display unit 204 displays pixel data of the decoded image, and is composed of a liquid crystal display or a plasma display, and the display unit 204 may be located inside the same housing as the receiving unit 201 or may be externally connected to the housing in which the receiving unit 201 is located. The horizontal image width is larger than the maximum decoding width of the decoding part, and the horizontal image height is not larger than the maximum decoding width of the decoding part, so that the decoding part can decode smoothly.
In the present embodiment, the image communication apparatus may include: the second transformation unit 203 performs the inverse operation of the two-dimensional matrix transformation on the pixel data of the decoded vertical image, and performs the rotation transformation to the original horizontal image, and for those skilled in the art, the process is clear and easy to obtain in combination with the schematic diagram of the two-dimensional matrix transformation of the horizontal image to the vertical image in fig. 4, and the codes, which are not described herein. Although the decoding section 202 can successfully decode out image data, the image data at this time is rotated compared with the original image data, and in some cases, it is inconvenient for the user to observe, and thus the second transformation section 203 performs the inverse operation of the two-dimensional matrix conversion with the first transformation section 102, converting the portrait image into the landscape image. Note that in this case, the display section 204 as a whole is not necessarily landscape, but the display section 204 includes a landscape display area suitable for displaying a landscape image. The display unit 204 may be adapted to fit an application scene, such as a vertical shape of a smart portable device, or a curved display screen. The display part may use a liquid crystal display, a plasma display.
Embodiment 3 is a schematic diagram of a network camera and a network video recorder according to the present embodiment, as shown in fig. 6, and the same reference numerals are attached to the same parts as those of the other embodiments in the present embodiment, and the description thereof is omitted.
The network camera 3 includes an imaging section 101, a first conversion section 102, an encoding section 103, and a transmitting section 104; the network video recorder 4 comprises a receiving part 201, a decoding part 202, a display part 204 and a second converting part 203; the display unit 204 may be disposed on the surface of the network video recorder 4, or may be an external display screen. The network camera 3 is in signal connection with the network video recorder 4, and the specific connection mode can be through VGA or HDMI signal transmission lines, or through wireless connection, for example, the network camera and the network video recorder are located under the router 5 network. The network cameras 3 and the network video recorders 4 are not necessarily in a one-to-one correspondence, and in one embodiment, one network video recorder 4 may correspond to 3-10 network cameras 3.
In a monitoring system application scenario, a camera component, a first conversion component and a coding component are located in a network camera IPC (IP Camera), and an image acquisition mode of the IPC is transverse acquisition. The common combined use with IPC is NVR, namely network video recorder Network Video Recorder, which is the storage and preview part of the network video monitoring system, and NVR and IPC (network camera) work cooperatively to complete the video recording, storage and forwarding functions.
The network video recorder comprises a receiving part 201, a decoding part 202, a display part 204 and a second conversion part 203; the network camera 3 is in signal connection with the network video recorder 4. The NVR centrally controls and manages IPC, the IPC uploads the monitored audio and video information to the NVR, and the NVR performs unified storage and forwarding. The NVR is used as a centralized controller and can be used for monitoring, video recording, playback, camera control, alarming and the like.
The IPC and NVR of each brand can be sold in a matched mode or can be sold independently, and the requirements of different brands on the collection width of each time are different. Therefore, the monitoring system may face the problem that when the image width (Wi) acquired and encoded by the IPC is greater than the maximum image width (Wn) decoded by the NVR and the image height (Hi) acquired and encoded by the IPC is less than the maximum image width (Wn) decoded by the NVR, the IPC acquires the encoded image data, and the decoding display cannot be directly performed on the NVR.
In this case, the horizontal image captured by the image capturing section of the IPC is converted and rotated into a vertical image by a two-dimensional matrix through a first conversion section built in the IPC, and then compressed by the encoding section according to an image encoding system such as h.264 or MPEG4, and transmitted by the transmitting section through a transmission line. The transmission line comprises a wire or a wireless mode, and the wireless mode comprises WIFI communication or mobile data communication. The receiving unit 201 in the NVR receives the compressed data of the longitudinal image through the transmission line, and decompresses the data into the longitudinal image by the decoding unit 202, and the height of the transverse image is not greater than the maximum decoding width of the decoding unit, so that the decoding unit 202 can decode smoothly. The decoded image obtained is actually rotated compared with the transverse image captured by the original imaging means. Accordingly, the portrait image is rotated and restored to the landscape image by the second conversion section 203 inside the NVR, the rotation and restoration process is the reverse operation of the rotation process performed by the first conversion section 103, and the landscape image is displayed in the display area of the display section 204 by the display section 204. If the NVR does not contain the second transforming part 203 inside, the displaying part 204 displays the portrait image formed by the landscape image rotation.
Embodiment 4 is a schematic diagram of a communication device and a mobile terminal of an image communication apparatus of the present embodiment, as shown in fig. 7, and the same reference numerals are given to the same parts as those of the other embodiments in the present embodiment, and the description thereof is omitted.
An image communication apparatus includes a communication device 5 with an image capturing function and a movable terminal 6. The communication apparatus 5 with an image capturing function includes an image capturing section 101, a first conversion section 102, an encoding section 103, and a transmitting section 104; the mobile terminal 6 includes a receiving section 201, a decoding section 201, a display section 203, and a second converting section 204; the communication device 5 is connected to the mobile terminal 6 by mobile data and wireless signals.
The image capturing section 101, the first conversion section 102, the encoding section 103, and the transmitting section 104 may be located in any communication device with an image capturing function, and alternatively, a mobile phone, a monitoring camera, a camera with a network communication function may be used as the communication device with an image capturing function. The horizontal image captured by the image capturing unit 101 is converted into a vertical image by the two-dimensional matrix conversion by the first conversion unit 102, compressed by the encoding unit 103 according to an image encoding system such as h.264 or MPEG4, and transmitted by the transmitting unit through WIFI communication or mobile data communication.
The mobile terminal comprises a receiving part 201, a decoding part 202, a display part 204. The receiving unit 201 receives the compressed data of the vertical image in a wireless manner, and then the data is decompressed into the vertical image by the decoding unit 202, the height of the horizontal image is not greater than the maximum decoding width of the decoding unit, and the decoding unit 202 can decode smoothly. The acquired decoded image is actually rotated by an angle compared with the transverse image captured by the original image capturing section 101. Since the display parts of the present mobile terminals are substantially longitudinal, in this embodiment, the mobile terminal 6 may not include the second conversion part; the decoding section 202 decodes the portrait image and directly displays it on the mobile terminal 6. Of course, the second conversion means may be provided in the mobile terminal 6 to rotate and restore the portrait image to a landscape image, and the landscape image may be displayed on the display area of the display means by the display means.
Embodiment 5 is a schematic diagram of an image communication method of the present embodiment as shown in fig. 8, and the same reference numerals are given to the same parts as those of the other embodiments in the present embodiment, and the description thereof is omitted.
An image communication method, comprising:
S101, shooting a transverse image, wherein the transverse image is suitable for a transverse display component which is longer than the longitudinal direction in the transverse direction in a display area;
S102, converting the pixel data of the transverse image into pixel data of a longitudinal image through two-dimensional matrix conversion rotation, wherein the longitudinal image is suitable for a longitudinal display part with the longitudinal direction longer than the transverse direction in a display area;
S103, encoding pixel data of the longitudinal image;
s104, sending coded data;
Wherein the lateral image height is not greater than the maximum decoding width when decoding the encoded data.
Embodiment 6 is a schematic diagram of an image communication method of the present embodiment as shown in fig. 9, and the same reference numerals are given to the same parts as those of the other embodiments in the present embodiment, and the description thereof is omitted.
The image communication method further comprises
S201, receiving coded data;
s202, decoding pixel data of the encoded longitudinal image;
S203, displaying pixel data of the decoded image.
Embodiment 7 is a schematic diagram of an image communication method of the present embodiment as shown in fig. 10, and the same reference numerals are given to the same parts as those of the other embodiments in the present embodiment, and the description thereof is omitted.
The image communication method further includes, after decoding the pixel data of the encoded vertical image: s301, performing the inverse operation of the two-dimensional matrix conversion described in embodiment 1 on the decoded pixel data of the vertical image, and performing a rotation conversion to obtain pixel data of the horizontal image.
In embodiment 8, as shown in fig. 11, which is a schematic diagram of the image communication method of the present embodiment, the same reference numerals are given to the same parts as those of the other embodiments in the present embodiment, and the description thereof is omitted.
The image communication method further includes S401 of attaching a flag of whether or not rotation restoration is necessary to the encoded data. After decoding, before display operation, judging whether to perform inverse operation of two-dimensional matrix conversion according to the rotation mark, and rotating and converting the pixel data of the decoded vertical image into the pixel data of the horizontal image.
Because the transmitting part and the receiving part are connected through the transmission line, when the transmitting part and the receiving part are connected, the IPC or the communication equipment with the camera shooting function can correspondingly know the display type of the NVR or the movable terminal, thereby pre-judging whether a rotary restoration mark is needed or not in the encoding process.
Example 9
A computer-readable storage medium storing any one of the image communication methods of embodiments 5 to 8 of any one of the image communication apparatuses of embodiments 1 to 4.
In the description of the present specification, reference to the terms "certain embodiments," "in one example," "illustratively," and the like, means that a particular feature, structure, material, or characteristic described in connection with the embodiments or examples is included in at least one embodiment or example of the present application. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.
Any process or method descriptions in flow charts or otherwise described herein may be understood as representing modules, segments, or portions of code which include one or more executable instructions for implementing specific logical functions or steps of the process, and further implementations are included within the scope of the preferred embodiment of the present application in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order, depending on the functionality involved, as would be understood by those reasonably skilled in the art of the present application.
While embodiments of the present application have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the application, and that variations, modifications, alternatives and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the application.
Claims (9)
1. An image communication apparatus, comprising:
an imaging section for capturing a lateral image suitable for a lateral display section having a longer lateral direction than a longitudinal direction in a display area;
A first conversion unit configured to convert pixel data of the horizontal image into pixel data of a vertical image by two-dimensional matrix conversion rotation, the vertical image being suitable for display on a vertical display unit having a longer vertical direction than the horizontal direction in a display area;
an encoding section that encodes pixel data of a vertical image;
And a transmitting section that transmits the encoded data; the encoded data is decoded by a decoding section;
wherein the lateral image height is not greater than the maximum decoding width of the decoding means.
2. The image communication apparatus according to claim 1, wherein the image capturing section, the first converting section, the encoding section, and the transmitting section are located in a network camera.
3. An image communication apparatus, comprising a receiving section that receives encoded data; a decoding unit for decoding pixel data of the encoded longitudinal image, wherein the longitudinal image is formed by converting and rotating a transverse image through a two-dimensional matrix; a second conversion section performing an inverse operation of the two-dimensional matrix conversion on the pixel data of the decoded vertical image, the inverse operation being rotationally converted into pixel data of the horizontal image; a display section that displays pixel data of an image that has been decoded; wherein the lateral image height is not greater than the maximum decoding width of the decoding means.
4. The image communication apparatus according to claim 3, wherein the receiving means, decoding means, display means, and second converting means are located within a network video recorder; the network video recorder is in signal connection with the network camera.
5. An image communication apparatus according to claim 3, wherein the display means comprises a liquid crystal display or a plasma display.
6. An image communication method, comprising:
capturing a lateral image suitable for display on a lateral display member having a longer lateral direction than a longitudinal direction of the display area;
converting the pixel data of the transverse image into pixel data of a longitudinal image through two-dimensional matrix conversion rotation, wherein the longitudinal image is suitable for displaying a longitudinal display part with longitudinal length longer than transverse length in a display area;
Encoding pixel data of the longitudinal image;
Transmitting the encoded data;
Wherein the lateral image height is not greater than the maximum decoding width when decoding the encoded data.
7. An image communication method, characterized in that the image communication method further comprises receiving encoded data; decoding the pixel data of the encoded longitudinal image; performing the inverse operation of the two-dimensional matrix transformation on the decoded pixel data of the longitudinal image, and rotating and transforming the pixel data into pixel data of the transverse image; and displaying pixel data of the decoded image, wherein the lateral image height is not greater than the maximum decoding width when decoding the encoded data.
8. The image communication method according to claim 6 or 7, further comprising, after the encoding data, attaching a flag indicating whether or not rotation restoration is required, determining whether or not to perform an inverse operation of two-dimensional matrix conversion based on the rotation flag before the display operation after decoding, and rotationally converting the pixel data of the decoded vertical image into the pixel data of the horizontal image.
9. A computer readable storage medium storing the image communication method of any one of claims 6-8 of any one of claims 1-5.
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