WO2020191813A1 - 一种基于自由视点的编解码方法及装置 - Google Patents
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Definitions
- the present invention relates to the technical field of video coding, in particular to a coding and decoding method and device based on free viewpoint.
- the application of free viewpoint allows viewers to watch videos in the form of continuous viewpoints within a certain range.
- the viewer can freely choose the position and angle of the viewpoint, and the viewing angle is no longer limited to one or several fixed camera angles. Since the free viewpoint is continuous, it is impossible to generate all possible viewpoints for storage and transmission in advance.
- the existing technology is based on the client terminal collecting the viewpoint information of the observer's current position, angle, etc., and generating the video of the designated viewpoint on the server. Transmitted to the client for viewers to watch.
- the existing technology has certain limitations.
- the client’s viewpoint information is transmitted back to the server, and there is a certain delay, resulting in a video viewing experience; on the other hand, when there are a large number of clients watching videos, it will cause huge problems to the server. Calculate pressure, so it is difficult to apply on a large scale.
- the embodiments of this specification provide a free viewpoint-based coding and decoding method and device to solve the following technical problems: the prior art has certain limitations. On the one hand, the client viewpoint information is transmitted back to the server, and there is a certain delay. Video viewing experience; on the other hand, when there are a large number of clients watching videos, it will cause huge computing pressure on the server, so it is difficult to apply on a large scale.
- the embodiment of this specification provides a coding method based on free viewpoint, including:
- said generating a plane mosaic based on multiple channels of single-view video specifically includes:
- the first temporary spliced image and the second temporary spliced image are spliced to generate a planar spliced image.
- the preset splicing mode means that when the first temporary splicing image and the second temporary splicing image are spliced, the first temporary splicing image and the second temporary splicing image are in accordance with Splicing in a left-right way or up and down way.
- the arrangement relationship between the images collected at the same time in the multi-channel single-view video and the depth map corresponding to the images collected at the same time in the multi-channel single-view video in the first temporary mosaic is in the
- the arrangement relationship in the second temporary mosaic is the same, and the images of each viewpoint in the multi-channel single-view video and their corresponding depth maps are respectively located in the same of the first temporary mosaic and the second temporary mosaic. position.
- the splicing information is used to record the information for generating the planar splicing image, including the number of single-view points of the multi-channel single-view video, the size of the splicing matrix, the preset splicing method and the first The position of the temporary mosaic or the second temporary mosaic in the plane mosaic.
- said generating the camera auxiliary information of the plane stitched video based on the camera auxiliary information existing in the multi-channel single-view video specifically includes:
- sequence-level camera auxiliary information in the camera auxiliary information of the multi-channel single-view video, splicing the sequence-level camera auxiliary information into the sequence-level camera auxiliary information of the plane spliced video;
- the image-level camera auxiliary information is spliced into the image-level camera auxiliary information of the plane spliced video.
- the camera auxiliary information includes information length and information data.
- the plane splicing video code stream includes a sequence header, a sequence-level extended data segment and a plurality of image data, wherein the image data includes an image header, an image-level extended data segment and image encoding data.
- the splicing information and the sequence-level camera auxiliary information of the plane spliced video are stored in the sequence-level extended data segment of the plane spliced video code stream, and the image-level camera auxiliary information of the plane spliced video is stored in the In the image-level extended data segment of the plane spliced video code stream.
- This manual provides a coding device based on free viewpoint, including:
- Image synthesis unit on the server side, based on multi-channel single-view video, generates plane mosaic and mosaic information
- the video synthesis unit generates a flat spliced video based on the flat spliced image
- the encoding unit encodes the plane mosaic video, the mosaic information, and the camera auxiliary information of the plane mosaic video to generate a plane mosaic video code stream.
- This manual provides a decoding method based on free viewpoint, including:
- the plane mosaic video code stream On the client side, decode the plane mosaic video code stream to obtain plane mosaic image, mosaic information and camera auxiliary information of the plane mosaic video, wherein the camera auxiliary information of the plane mosaic video includes the sequence-level camera auxiliary information of the plane mosaic video and/ Or image-level camera auxiliary information of plane splicing video;
- the camera auxiliary information of each video in the multi-channel single-view video, the image of each video in the multi-channel single-view video and the corresponding depth map are synthesized to obtain a virtual viewpoint.
- This specification provides a free viewpoint-based decoding device, including:
- the decoding unit decodes the plane mosaic video stream to obtain plane mosaic images, mosaic information and camera auxiliary information of the plane mosaic video, wherein the camera auxiliary information of the plane mosaic video includes the sequence-level camera auxiliary information of the plane mosaic video Information and/or image-level camera auxiliary information of the plane mosaic video;
- the image analysis unit obtains the image of each channel of the multi-channel single-view video and the corresponding depth map according to the plane mosaic image and the mosaic information;
- a video parsing unit according to the camera auxiliary information of the plane splicing video, obtain the camera auxiliary information of each channel of the multi-channel single-view video;
- the synthesis unit synthesizes the camera auxiliary information of each channel of the multi-channel single-view video, the image of each channel of the multi-channel single-view video and the corresponding depth map to obtain a virtual Point of view.
- the present invention generates a plane splicing picture and splicing information based on multiple channels of single-view video on the server side; generates a plane splicing video based on the plane splicing picture; and generates the said camera auxiliary information based on the multiple channels of single-view video.
- the plane splicing video code stream is stored and transmitted in the form of ordinary plane video code stream.
- the client side decode the plane mosaic video code stream to obtain plane mosaic image, mosaic information and camera auxiliary information of the plane mosaic video, wherein the camera auxiliary information of the plane mosaic video includes the sequence-level camera auxiliary information of the plane mosaic video and/ Or image-level camera auxiliary information of the plane spliced video; according to the plane splicing image and the splicing information, the image of each channel of the multi-channel single-view video and the corresponding depth map are obtained; the camera auxiliary information of the plane spliced video Information, obtain the camera auxiliary information of each channel of the multi-channel single-view video; according to the viewer's viewpoint information, combine the camera auxiliary information of each channel of the multi-channel single-view video and the multi-channel single-view video The images of each video in the video and the corresponding depth map are synthesized to obtain a virtual viewpoint. Based on the solution of the present invention, it is possible to realize free viewpoint synthesis on the client side, thereby reducing viewing delay, reducing the computing pressure on the server side, and
- FIG. 1 is a schematic flowchart of a coding method based on free viewpoint provided by an embodiment of the present invention
- FIG. 2 is a schematic diagram of a splicing method for plane splicing images provided by an embodiment of the present invention
- FIG. 3 is a schematic diagram of a method for splicing camera auxiliary information provided by an embodiment of this specification
- FIG. 4 is a schematic diagram of the structure of a plane splicing video code stream provided by an embodiment of the specification
- FIG. 5 is a schematic diagram of a free viewpoint-based encoding device provided by an embodiment of this specification.
- FIG. 6 is a schematic flowchart of a decoding method based on free viewpoint provided by an embodiment of this specification
- Fig. 7 is a schematic diagram of a free-view-based decoding device provided by an embodiment of this specification.
- Fig. 1 is a schematic flowchart of a free-viewpoint-based coding method provided by an embodiment of the present invention. The method may specifically include the following steps:
- Step S101 On the server side, based on the multi-channel single-view video, generate a flat mosaic image and mosaic information.
- the multi-channel single-view video includes at least two single-view videos.
- multi-channel single-view videos are spliced in the form of splicing matrix.
- the number of multi-channel single-view viewpoints is M ⁇ N, where M and N are both integers greater than 0.
- generating a plane mosaic specifically includes: generating a first temporary mosaic and a second temporary mosaic, and stitching the first temporary mosaic with the second temporary mosaic To generate a flat mosaic.
- the images collected at the same time in the multi-channel single-view video are stitched in the form of a mosaic matrix to generate the first temporary mosaic; the images collected at the same time in the multi-channel single-view video are corresponding to The depth map is spliced in the form of a splicing matrix to generate a second temporary splicing map; according to a preset splicing method, the first temporary splicing map and the second temporary splicing map are spliced to generate a plane splicing map.
- the arrangement relationship of the images collected at the same time in the multi-channel single-view video in the first temporary mosaic and the multi-channel single-view have the same arrangement in the second temporary mosaic.
- the images of each viewpoint in the multi-channel single-view video and their corresponding depth maps are located in the first temporary mosaic and the second temporary mosaic respectively. Second, the same position of the temporary mosaic.
- the preset splicing method refers to that when the first temporary splicing image and the second temporary splicing image are spliced, the first temporary splicing image and the second temporary splicing image are spliced in a left-to-right manner or up and down.
- the factors that need to be considered in the design of the preset splicing method include but are not limited to: try to keep the size of the final planar splicing image close to the size of the ordinary image, such as 4:3, 16:9, etc., and minimize the more significant The stitching seams, application scenarios, the number of multiple viewpoints, and the resolution of single viewpoints.
- the splicing information is used to record the information for generating the flat splicing picture, including but not limited to: the number of single-view points of the multi-channel single-view video, the size of the splicing matrix, the preset splicing method, and the first temporary splicing The position of the map or the second temporary mosaic in the plane mosaic.
- the splicing methods of the first temporary mosaic, the second temporary mosaic, and the planar mosaic include, but are not limited to: image mosaic algorithm based on template registration, image mosaic algorithm based on image phase correlation, and feature-based Point-based image stitching algorithm, area-based image stitching algorithm.
- FIG. 2 is a schematic diagram of a method for splicing plane splicing images provided by an embodiment of the present invention. Specifically, the images collected at the same time in the 9-channel single-view video are stitched as shown in Figure 2 to generate the first temporary stitching image; the depth map corresponding to the image collected at the same time in the 9-channel single-view video is as shown in Figure 2 It shows that the second temporary stitching is generated, where the image in the single-view video is marked as image x, y, and the depth map corresponding to the image x, y is marked as depth map x, y.
- the generated splicing information includes: the number of single viewpoints is 9, the size of the splicing matrix is 3*3, and the preset splicing method is left and right splicing.
- the first temporary splicing image is located on the left side of the planar splicing image or the second temporary splicing image is located The right side of the flat mosaic.
- Step S103 Generate a plane mosaic video based on the plane mosaic image.
- the plane mosaic images at different times are combined into a plane mosaic video.
- Step S105 Based on the camera auxiliary information existing in the multi-channel single-view video, generate the camera auxiliary information of the plane spliced video.
- the camera auxiliary information is used to record camera related information, including but not limited to: camera external parameters, camera internal parameters, lens distortion parameters, aperture, exposure time, exposure compensation parameters, white balance parameters, color temperature,
- the external camera parameters include, but are not limited to, camera position and shooting angle. According to different application scenarios, during the video shooting process, some parameters of the camera auxiliary information will remain unchanged, while some parameters of the camera auxiliary information will change. If the camera is fixed in an application scenario, the camera's external parameters remain unchanged during the video shooting process. Similarly, if in another application scenario, mobile shooting is required, the camera will The external parameters keep changing.
- the composition of the camera auxiliary information includes but is not limited to: information length and information data, where the information length is used to record the length of the information data, and the information data is used to record the relevant content of the camera auxiliary information.
- the camera auxiliary information that remains unchanged in each channel of single-view video during the shooting process is defined as sequence-level camera auxiliary information.
- the camera that changes in each channel of single-view video during the shooting process Auxiliary information is defined as image-level camera auxiliary information.
- the sequence-level camera auxiliary information existing in each channel of single-view video in the multi-channel single-view video is spliced into the sequence-level camera auxiliary information of the plane spliced video, and each channel in the multi-channel single-view video
- the image-level camera auxiliary information existing in the single-view video is spliced into the image-level camera auxiliary information of the plane spliced video.
- Fig. 3 is a schematic diagram of a method for splicing camera auxiliary information provided by an embodiment of this specification.
- the camera auxiliary information of each channel of the single-view video in the multi-channel single-view video is stitched one by one in the raster scan order .
- Step S107 Encode the plane mosaic video, the mosaic information, and the camera auxiliary information of the plane mosaic video to generate a plane mosaic video code stream.
- the plane splicing video code stream includes: a sequence header, sequence-level extension data, and multiple image data, as shown in FIG. 4.
- FIG. 4 is a schematic diagram of the structure of a plane splicing video code stream provided by an embodiment of this specification.
- the sequence header records information other than necessary data required for decoding, including but not limited to: encoding method and resolution
- sequence-level extended data segments include, but are not limited to: splicing information and sequence-level camera auxiliary information of plane spliced video.
- the image data represents the information of each plane spliced video contained in the plane spliced video code stream, including but not limited to the image header, the image-level extended data segment and the image encoding data.
- the image header records the encoding data in the plane spliced video.
- the image-level extended data segment includes but is not limited to: the image-level camera auxiliary information of the plane splicing video; the image coding data is used for the data encoded in the plane splicing video stream.
- the plane stitching video, the stitching information, and the camera auxiliary information of the plane stitching video are encoded to generate a plane stitching video code stream.
- the coding standards used include but are not limited to: AVS3 , AVS2, AVS1, H.265/HEVC, H.264/AVC.
- the generated plane splicing video stream is stored and transmitted.
- FIG. 5 is a schematic diagram of a free-viewpoint-based coding device provided by the embodiment of this specification.
- the encoding device mainly includes:
- the image synthesis unit 501 on the server side, generates a flat mosaic image and mosaic information based on multiple single-view videos;
- the video synthesis unit 503 generates a plane mosaic video based on the plane mosaic image
- the encoding unit 505 encodes the plane mosaic video, the mosaic information, and the camera auxiliary information of the plane mosaic video to generate a plane mosaic video code stream.
- Figure 6 is a schematic flowchart of a free-viewpoint-based decoding method provided by an embodiment of this specification.
- the decoding method specifically includes:
- Step S601 On the client side, decode the plane mosaic video code stream to obtain plane mosaic image, mosaic information, and camera auxiliary information of the plane mosaic video, wherein the camera auxiliary information of the plane mosaic video includes the sequence-level camera auxiliary information of the plane mosaic video Information and/or image-level camera auxiliary information of the plane mosaic video;
- Step S603 Obtain images and corresponding depth maps of each channel of the multi-channel single-view video according to the plane mosaic image and the mosaic information;
- Step S605 Obtain camera auxiliary information of each channel of the multi-channel single-view video according to the camera auxiliary information of the plane stitched video;
- Step S607 According to the viewpoint information of the viewer, synthesize the camera auxiliary information of each video in the multi-channel single-view video, the image of each video in the multi-channel single-view video, and the corresponding depth map to obtain a virtual Point of view.
- FIG. 7 is a schematic diagram of a free-viewpoint-based decoding device provided by an embodiment of this specification.
- the decoding device specifically includes:
- the decoding unit 701 decodes the plane mosaic video code stream to obtain plane mosaic images, mosaic information, and camera auxiliary information of the plane mosaic video, wherein the camera auxiliary information of the plane mosaic video includes the sequence-level camera of the plane mosaic video Auxiliary information and/or image-level camera auxiliary information of the plane mosaic video;
- the image analysis unit 703 obtains images and corresponding depth maps of each channel of the multi-channel single-view video according to the plane mosaic image and the mosaic information;
- the video parsing unit 705 obtains the camera auxiliary information of each channel of the multi-channel single-view video according to the camera auxiliary information of the plane stitched video;
- the synthesis unit 707 synthesizes the camera auxiliary information of each channel of the multi-channel single-view video, the image of each channel of the multi-channel single-view video, and the corresponding depth map to obtain Virtual viewpoint.
- the viewpoint information of the viewer includes, but is not limited to: viewpoint position, viewing angle direction, and viewing angle.
- the viewpoint information of the viewer is collected in real time based on the equipment worn by the viewer.
- Using the free-viewpoint-based coding and decoding method provided by the embodiments of this specification can realize encoding on the server side and performing free-viewpoint synthesis on the client side, thereby reducing viewing delay, reducing computing pressure on the server side, and improving viewing experience.
- the device, electronic device, non-volatile computer storage medium and method provided in the embodiments of this specification correspond to each other. Therefore, the device, electronic device, and non-volatile computer storage medium also have beneficial technical effects similar to the corresponding method.
- the beneficial technical effects of the method have been described in detail above, therefore, the beneficial technical effects of the corresponding device, electronic equipment, and non-volatile computer storage medium will not be repeated here.
- a programmable logic device Programmable Logic Device, PLD
- FPGA Field Programmable Gate Array
- HDL Hardware Description Language
- ABEL Advanced Boolean Expression Language
- AHDL Altera Hardware Description Language
- HDCal JHDL
- Java Hardware Description Language Lava, Lola, MyHDL, PALASM
- RHDL Rule Hardware Description Language
- VHDL Very-High-Speed Integrated Circuit Hardware Description Language
- Verilog Verilog
- the controller can be implemented in any suitable manner.
- the controller can take the form of, for example, a microprocessor or a processor and a computer-readable medium storing computer-readable program codes (such as software or firmware) executable by the (micro)processor.
- controllers include but are not limited to the following microcontrollers: ARC 625D, Atmel AT91SAM, Microchip PIC18F26K20 As well as Silicon Labs C8051F320, the memory controller can also be implemented as a part of the memory control logic.
- controller in addition to implementing the controller in a purely computer-readable program code manner, it is entirely possible to program the method steps to make the controller use logic gates, switches, application specific integrated circuits, programmable logic controllers and embedded The same function can be realized in the form of a microcontroller, etc. Therefore, such a controller can be regarded as a hardware component, and the devices included in it for implementing various functions can also be regarded as a structure within the hardware component. Or even, the device for realizing various functions can be regarded as both a software module for realizing the method and a structure within a hardware component.
- a typical implementation device is a computer.
- the computer may be, for example, a personal computer, a laptop computer, a cell phone, a camera phone, a smart phone, a personal digital assistant, a media player, a navigation device, an email device, a game console, a tablet computer, a wearable device, or Any combination of these devices.
- the embodiments of this specification can be provided as methods, systems, or computer program products. Therefore, the embodiments of this specification may adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Moreover, the embodiments of this specification may adopt the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program codes.
- computer-usable storage media including but not limited to disk storage, CD-ROM, optical storage, etc.
- These computer program instructions can also be stored in a computer-readable memory that can guide a computer or other programmable data processing equipment to work in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture including the instruction device.
- the device implements the functions specified in one process or multiple processes in the flowchart and/or one block or multiple blocks in the block diagram.
- These computer program instructions can also be loaded on a computer or other programmable data processing equipment, so that a series of operation steps are executed on the computer or other programmable equipment to produce computer-implemented processing, so as to execute on the computer or other programmable equipment.
- the instructions provide steps for implementing functions specified in a flow or multiple flows in the flowchart and/or a block or multiple blocks in the block diagram.
- the computing device includes one or more processors (CPUs), input/output interfaces, network interfaces, and memory.
- processors CPUs
- input/output interfaces network interfaces
- memory volatile and non-volatile memory
- the memory may include non-permanent memory in computer readable media, random access memory (RAM) and/or non-volatile memory, such as read-only memory (ROM) or flash memory (flash RAM). Memory is an example of computer readable media.
- RAM random access memory
- ROM read-only memory
- flash RAM flash memory
- Computer-readable media include permanent and non-permanent, removable and non-removable media, and information storage can be realized by any method or technology.
- the information can be computer-readable instructions, data structures, program modules, or other data.
- Examples of computer storage media include, but are not limited to, phase change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technology, CD-ROM, digital versatile disc (DVD) or other optical storage, Magnetic cassettes, magnetic tape magnetic disk storage or other magnetic storage devices or any other non-transmission media can be used to store information that can be accessed by computing devices. According to the definition in this article, computer-readable media does not include transitory media, such as modulated data signals and carrier waves.
- program modules include routines, programs, objects, components, data structures, etc. that perform specific tasks or implement specific abstract data types.
- the instructions can also be practiced in distributed computing environments, in which tasks are performed by remote processing devices connected through a communication network.
- program modules can be located in local and remote computer storage media including storage devices.
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Abstract
本说明书实施例提供了一种基于自由视点的编解码方法及装置,属于视频编码技术领域。该方法包括:在服务端,基于多路单视点视频,生成平面拼接图及拼接信息;基于所述平面拼接图,生成平面拼接视频;基于多路单视点视频中存在的摄像机辅助信息,生成所述平面拼接视频的摄像机辅助信息;对所述平面拼接视频、所述拼接信息及所述平面拼接视频的摄像机辅助信息进行编码,生成平面拼接视频码流。在客户端,解码平面拼接视频码流,根据观看者的视点信息,得到虚拟视点。采用本说明书提供的方法,能够实现在客户端进行自由视点的合成,从而降低观看延迟,减轻服务端计算压力,改善观看体验。
Description
本申请要求享有2019年3月28日提交的名称为“一种基于自由视点的编解码方法及装置”的中国专利申请CN 201910240995.1的优先权,其全部内容通过引用并入本文中。
本发明涉及视频编码技术领域,尤其涉及一种基于自由视点的编解码方法及装置。
自由视点的应用,使得观看者可以在一定范围内以连续视点的形式观看视频。观看者可以自由选择视点的位置、角度,观看角度不再局限于一个或几个固定的摄像机视角。由于自由视点是连续的,因此无法预先生成所有可能的视点进行存储和传输,现有技术基于客户端采集观察者当前时刻选定的位置、角度等视点信息,在服务端生成指定视点的视频,传输到客户端供观看者进行观看。现有技术存在一定的局限性,一方面,客户端视点信息传输回服务端,存在一定的延迟,影像观看体验;另外一方面,当存在大量客户端观看视频时,会对服务端造成巨大的计算压力,因此难以大规模应用。
因此,需要一种新的方法,能够改善观看体验,降低观看延迟,减轻服务端计算压力。
发明内容
本说明书实施例提供一种基于自由视点的编解码方法及装置,用于解决以下技术问题:现有技术存在一定的局限性,一方面,客户端视点信息传输回服 务端,存在一定的延迟,影像观看体验;另外一方面,当存在大量客户端观看视频时,会对服务端造成巨大的计算压力,因此难以大规模应用。
为解决上述技术问题,本说明书实施例是这样实现的:
本说明书实施例提供一种基于自由视点的编码方法,包括:
在服务端,基于多路单视点视频,生成平面拼接图及拼接信息;
基于所述平面拼接图,生成平面拼接视频;
基于多路单视点视频中存在的摄像机辅助信息,生成所述平面拼接视频的摄像机辅助信息;
对所述平面拼接视频、所述拼接信息及所述平面拼接视频的摄像机辅助信息进行编码,生成平面拼接视频码流。
优选地,所述基于多路单视点视频,生成平面拼接图,具体包括:
将所述多路单视点视频中同一时刻采集的图像以拼接矩阵的形式进行拼接,生成第一临时拼接图;
将所述多路单视点视频中同一时刻采集的图像对应的深度图以拼接矩阵的形式进行拼接,生成第二临时拼接图;
按照预设的拼接方式,将所述第一临时拼接图和所述第二临时拼接图进行拼接,生成平面拼接图。
优选地,所述预设的拼接方式是指所述将所述第一临时拼接图和所述第二临时拼接图进行拼接时,所述第一临时拼接图和所述第二临时拼接图按照左右方式或者上下方式进行拼接。
优选地,所述多路单视点视频中同一时刻采集的图像在所述第一临时拼接图中的排布关系与所述多路单视点视频中同一时刻采集的图像对应的深度图在所述第二临时拼接图中的排布关系相同,所述多路单视点视频中各路视点的图像及其对应的深度图分别位于所述第一临时拼接图和所述第二临时拼接图的相同位置。
优选地,所述拼接信息用于记录所述生成平面拼接图的信息,包括所述多 路单视点视频的单视点个数、拼接矩阵的尺寸、所述预设的拼接方式及所述第一临时拼接图或所述第二临时拼接图在所述平面拼接图中的位置。
优选地,所述基于多路单视点视频中存在的摄像机辅助信息,生成所述平面拼接视频的摄像机辅助信息,具体包括:
若所述多路单视点视频的摄像机辅助信息中存在序列级摄像机辅助信息,将所述序列级摄像机辅助信息拼接成为所述平面拼接视频的序列级摄像机辅助信息;
若所述多路单视点视频的摄像机辅助信息中存在图像级摄像机辅助信息,将所述图像级摄像机辅助信息拼接成为所述平面拼接视频的图像级摄像机辅助信息。
优选地,所述摄像机辅助信息包括信息长度和信息数据。
优选地,所述平面拼接视频码流包括序列头、序列级扩展数据段及多个图像数据,其中,所述图像数据包括图像头、图像级扩展数据段和图像编码数据。
优选地,所述拼接信息、所述平面拼接视频的序列级摄像机辅助信息存放于所述平面拼接视频码流的序列级扩展数据段中,所述平面拼接视频的图像级摄像机辅助信息存放于所述平面拼接视频码流的图像级扩展数据段中。
本说明书提供一种基于自由视点的编码装置,包括:
图像合成单元,在服务端,基于多路单视点视频,生成平面拼接图及拼接信息;
视频合成单元,基于所述平面拼接图,生成平面拼接视频;
基于多路单视点视频中存在的摄像机辅助信息,生成所述平面拼接视频的摄像机辅助信息;
编码单元,对所述平面拼接视频、所述拼接信息及所述平面拼接视频的摄像机辅助信息进行编码,生成平面拼接视频码流。
本说明书提供一种基于自由视点的解码方法,包括:
在客户端,解码平面拼接视频码流,获得平面拼接图、拼接信息及平面拼 接视频的摄像机辅助信息,其中,所述平面拼接视频的摄像机辅助信息包括平面拼接视频的序列级摄像机辅助信息和/或平面拼接视频的图像级摄像机辅助信息;
根据所述平面拼接图和所述拼接信息,获得多路单视点视频中各路视频的图像及对应的深度图;
根据所述平面拼接视频的摄像机辅助信息,获得所述多路单视点视频中各路视频的摄像机辅助信息;
根据观看者的视点信息,将所述多路单视点视频中各路视频的摄像机辅助信息、所述多路单视点视频中各路视频的图像及对应的深度图进行合成,得到虚拟视点。
本说明书提供一种基于自由视点的解码装置,包括:
解码单元,在客户端,解码平面拼接视频码流,获得平面拼接图、拼接信息及平面拼接视频的摄像机辅助信息,其中,所述平面拼接视频的摄像机辅助信息包括平面拼接视频的序列级摄像机辅助信息和/或平面拼接视频的图像级摄像机辅助信息;
图像解析单元,根据所述平面拼接图和所述拼接信息,获得多路单视点视频中各路视频的图像及对应的深度图;
视频解析单元,根据所述平面拼接视频的摄像机辅助信息,获得所述多路单视点视频中各路视频的摄像机辅助信息;
合成单元,根据观看者的视点信息,将所述多路单视点视频中各路视频的摄像机辅助信息、所述多路单视点视频中各路视频的图像及对应的深度图进行合成,得到虚拟视点。
本说明书实施例采用的上述至少一个技术方案能够达到以下有益效果:
本发明通过在服务端,基于多路单视点视频,生成平面拼接图及拼接信息;基于所述平面拼接图,生成平面拼接视频;基于多路单视点视频中存在的摄像机辅助信息,生成所述平面拼接视频的摄像机辅助信息;对所述平面拼接视频、 所述拼接信息及所述平面拼接视频的摄像机辅助信息进行编码,生成平面拼接视频码流。平面拼接视频码流以普通平面视频码流的形式进行存储和传输。在客户端,解码平面拼接视频码流,获得平面拼接图、拼接信息及平面拼接视频的摄像机辅助信息,其中,所述平面拼接视频的摄像机辅助信息包括平面拼接视频的序列级摄像机辅助信息和/或平面拼接视频的图像级摄像机辅助信息;根据所述平面拼接图和所述拼接信息,获得多路单视点视频中各路视频的图像及对应的深度图;根据所述平面拼接视频的摄像机辅助信息,获得所述多路单视点视频中各路视频的摄像机辅助信息;根据观看者的视点信息,将所述多路单视点视频中各路视频的摄像机辅助信息、所述多路单视点视频中各路视频的图像及对应的深度图进行合成,得到虚拟视点。基于本发明的方案,能够实现在客户端进行自由视点的合成,从而降低观看延迟,减轻服务端计算压力,改善观看体验。
为了更清楚地说明本说明书实施例或现有技术中的技术方案,下面将对实施例或现有技术描述中所需要使用的附图作简单地介绍,显而易见地,下面描述中的附图仅仅是本说明书中记载的一些实施例,对于本领域普通技术人员来讲,在不付出创造性劳动性的前提下,还可以根据这些附图获得其他的附图。
图1是本发明实施例提供的一种基于自由视点的编码方法的流程示意图;
图2为本发明实施例提供的一种平面拼接图的拼接方法示意图;
图3为本说明书实施例提供的摄像机辅助信息的拼接方法示意图;
图4为本说明书实施例提供的平面拼接视频码流的结构示意图;
图5为本说明书实施例提供的一种基于自由视点的编码装置的示意图;
图6为本说明书实施例提供的一种基于自由视点的解码方法的流程示意图;
图7为本说明书实施例提供的一种基于自由视点的解码装置的示意图。
为了使本技术领域的人员更好地理解本说明书中的技术方案,下面将结合本说明书实施例中的附图,对本说明书实施例中的技术方案进行清楚、完整地描述,显然,所描述的实施例仅仅是本申请一部分实施例,而不是全部的实施例。基于本说明书实施例,本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施例,都应当属于本申请保护的范围。
图1是本发明实施例提供的一种基于自由视点的编码方法的流程示意图。该方法具体可以包括以下步骤:
步骤S101:在服务端,基于多路单视点视频,生成平面拼接图及拼接信息。
在本申请实施例中,多路单视点视频至少包括2路单视点视频。在具体实施过程中,多路单视点视频以拼接矩阵的形式进行拼接。多路单视点的视点个数为M×N,其中M和N均为大于0的整数。
在本申请实施例中,基于多路单视点视频,生成平面拼接图,具体包括:生成第一临时拼接图和第二临时拼接图,并将第一临时拼接图和第二临时拼接图进行拼接,生成平面拼接图。在本申请的一个实施例中,将多路单视点视频中同一时刻采集的图像以拼接矩阵的形式进行拼接,生成第一临时拼接图;将多路单视点视频中同一时刻采集的图像对应的深度图以拼接矩阵的形式进行拼接,生成第二临时拼接图;按照预设的拼接方式,将第一临时拼接图和第二临时拼接图进行拼接,生成平面拼接图。需要特别说明的是,为了保证单视点视频的图像及其对应的深度图像的一致性,多路单视点视频中同一时刻采集的图像在第一临时拼接图中的排布关系与多路单视点视频中同一时刻采集的图像对应的深度图在第二临时拼接图中的排布关系相同,多路单视点视频中各路视点的图像及其对应的深度图分别位于第一临时拼接图和第二临时拼接图的相同位置。
在本申请实施例中,预设的拼接方式是指将第一临时拼接图和第二临时拼 接图进行拼接时,第一临时拼接图和第二临时拼接图按照左右方式或者上下方式进行拼接。在具体实施例中,预设拼接方式的设计需要考虑的因素包括但不限于:尽量保持最终的平面拼接图的尺寸接近普通图像的尺寸,如4:3、16:9等,尽量减少比较显著的拼接缝,应用场景,多路视点的个数,单路视点的分辨率。
在本申请实施例中,拼接信息用于记录生成平面拼接图的信息,包括但不限于:多路单视点视频的单视点个数、拼接矩阵的尺寸、预设的拼接方式、第一临时拼接图或第二临时拼接图在平面拼接图中的位置。
在本申请实施例中,第一临时拼接图、第二临时拼接图及平面拼接图的拼接方法包括但不限于:基于模板配准的图像拼接算法、基于图像相位相关的图像拼接算法、基于特征点的图像拼接算法、基于区域的图像拼接算法。
在本申请的一个实施例中,多路单视点视频为9路,采用图2所示的方法生成平面拼接图。图2为本发明实施例提供的一种平面拼接图的拼接方法示意图。具体地,将9路单视点视频中同一时刻采集的图像按照图2所示进行拼接,生成第一临时拼接图;将9路单视点视频中同一时刻采集的图像对应的深度图按照图2所示进行拼接,生成第二临时拼接图,其中,单视点视频中的图像标记为图像x,y,图像x,y对应的深度图标记为深度图x,y。然后将第一临时拼接图和第二临时拼接图按照左右方式拼接为平面拼接图,第一临时拼接图位于平面拼接图的左侧。生成的拼接信息包括:单视点个数9,拼接矩阵的尺寸为3*3,预设的拼接方式为左右方式拼接,第一临时拼接图位于平面拼接图的左侧或第二临时拼接图位于平面拼接图的右侧。
步骤S103:基于所述平面拼接图,生成平面拼接视频。
基于前述步骤S101生成的平面拼接图,将不同时刻的平面拼接图组成平面拼接视频。
步骤S105:基于多路单视点视频中存在的摄像机辅助信息,生成所述平面拼接视频的摄像机辅助信息。
在本申请实施例中,摄像机辅助信息用于记录摄像机的相关信息,包括但 不限于:摄像机外参数,摄像机内参数,镜头畸变参数,光圈,曝光时间,曝光补偿参数,白平衡参数,色温,其中,摄像机外参数包括但不限于摄像机位置、拍摄角度。根据不同的应用场景,在视频拍摄过程中,摄像机辅助信息的某些参数会保持不变,而摄像机辅助信息的某些参数会发生改变。如在一个应用场景中,摄像机固定不变,则在视频拍摄过程中,摄像机外参数保持不变,同理,如在另外一个应用场景中,需要进行移动拍摄,则在视频拍摄过程中,摄像机外参数保持发生改变。摄像机辅助信息的组成包括但不限于:信息长度和信息数据,其中,信息长度用于记录信息数据的长度,信息数据用于记录摄像机辅助信息的相关内容。
在本申请实施例中,将在拍摄过程中,各路单视点视频中保持不变的摄像机辅助信息定义为序列级摄像机辅助信息,将在拍摄过程中,各路单视点视频中发生改变的摄像机辅助信息定义为图像级摄像机辅助信息。
在本申请的一个实施例中,将多路单视点视频中各路单视点视频中存在的序列级摄像机辅助信息拼接成为平面拼接视频的序列级摄像机辅助信息,将多路单视点视频中各路单视点视频中存在的图像级摄像机辅助信息拼接成为平面拼接视频的图像级摄像机辅助信息。图3为本说明书实施例提供的摄像机辅助信息的拼接方法示意图。具体地,按照多路单视点视频中同一时刻采集的图像在所述第一临时拼接图中的排布关系,以光栅扫描顺序逐一拼接多路单视点视频中各路单视点视频的摄像机辅助信息。
步骤S107:对所述平面拼接视频、所述拼接信息及所述平面拼接视频的摄像机辅助信息进行编码,生成平面拼接视频码流。
在本申请实施例中,平面拼接视频码流包括:序列头、序列级扩展数据及多个图像数据,具体如图4所示。图4为本说明书实施例提供的平面拼接视频码流的结构示意图。具体地,序列头记录解码需要的必需数据之外的信息,包括但不限于:编码方式、分辨率,序列级扩展数据段包括但不限于:拼接信息、平面拼接视频的序列级摄像机辅助信息。图像数据表示平面拼接视频码流中所 包含的每个平面拼接视频的信息,包括但不限于图像头、图像级扩展数据段和图像编码数据,其中,图像头记录平面拼接视频中编码数据之外的辅助信息;图像级扩展数据段包括但不限于:平面拼接视频的图像级摄像机辅助信息;图像编码数据用于平面拼接视频码流中进行编码的数据。
在本申请的实施例中,对所述平面拼接视频、所述拼接信息及所述平面拼接视频的摄像机辅助信息进行编码,生成平面拼接视频码流,所采用的编码标准包括但不限于:AVS3、AVS2、AVS1、H.265/HEVC、H.264/AVC。
在实际应用中,生成的平面拼接视频码流进行存储和传输。
基于同样的思路,本说明书实施例还提供了一种基于自由视点的编码装置,图5为本说明书实施例提供的一种基于自由视点的编码装置的示意图。该编码装置主要包括:
图像合成单元501,在服务端,基于多路单视点视频,生成平面拼接图及拼接信息;
视频合成单元503,基于所述平面拼接图,生成平面拼接视频;
基于多路单视点视频中存在的摄像机辅助信息,生成所述平面拼接视频的摄像机辅助信息;
编码单元505,对所述平面拼接视频、所述拼接信息及所述平面拼接视频的摄像机辅助信息进行编码,生成平面拼接视频码流。
基于同样的思路,本说明书提供一种基于自由视点的解码方法,图6为本说明书实施例提供的一种基于自由视点的解码方法的流程示意图,该解码方法具体包括:
步骤S601:在客户端,解码平面拼接视频码流,获得平面拼接图、拼接信息及平面拼接视频的摄像机辅助信息,其中,所述平面拼接视频的摄像机辅助信息包括平面拼接视频的序列级摄像机辅助信息和/或平面拼接视频的图像级摄像机辅助信息;
步骤S603:根据所述平面拼接图和所述拼接信息,获得多路单视点视频中 各路视频的图像及对应的深度图;
步骤S605:根据所述平面拼接视频的摄像机辅助信息,获得所述多路单视点视频中各路视频的摄像机辅助信息;
步骤S607:根据观看者的视点信息,将所述多路单视点视频中各路视频的摄像机辅助信息、所述多路单视点视频中各路视频的图像及对应的深度图进行合成,得到虚拟视点。
基于同样的思路,本说明书实施例还提供了一种基于自由视点的解码装置,图7为本说明书实施例提供的一种基于自由视点的解码装置的示意图。该解码装置具体包括:
解码单元701,在客户端,解码平面拼接视频码流,获得平面拼接图、拼接信息及平面拼接视频的摄像机辅助信息,其中,所述平面拼接视频的摄像机辅助信息包括平面拼接视频的序列级摄像机辅助信息和/或平面拼接视频的图像级摄像机辅助信息;
图像解析单元703,根据所述平面拼接图和所述拼接信息,获得多路单视点视频中各路视频的图像及对应的深度图;
视频解析单元705,根据所述平面拼接视频的摄像机辅助信息,获得所述多路单视点视频中各路视频的摄像机辅助信息;
合成单元707,根据观看者的视点信息,将所述多路单视点视频中各路视频的摄像机辅助信息、所述多路单视点视频中各路视频的图像及对应的深度图进行合成,得到虚拟视点。
在本申请中,观看者的视点信息包括但不限于:视点位置、视角朝向、视野角度。观看者的视点信息是基于观看者佩戴的设备实时采集获得的。
采用本说明书实施例提供的基于自由视点的编解码方法,能够实现在服务端进行编码,在客户端进行自由视点的合成,从而降低观看延迟,减轻服务端计算压力,改善观看体验。
上述对本说明书特定实施例进行了描述。其它实施例在所附权利要求书的 范围内。在一些情况下,在权利要求书中记载的动作或步骤可以按照不同于实施例中的顺序来执行并且仍然可以实现期望的结果。另外,在附图中描绘的过程不一定要求示出的特定顺序或者连续顺序才能实现期望的结果。在某些实施方式中,多任务处理和并行处理也是可以的或者可能是有利的。
本说明书中的各个实施例均采用递进的方式描述,各个实施例之间相同相似的部分互相参见即可,每个实施例重点说明的都是与其他实施例的不同之处。尤其,对于装置、电子设备、非易失性计算机存储介质实施例而言,由于其基本相似于方法实施例,所以描述的比较简单,相关之处参见方法实施例的部分说明即可。
本说明书实施例提供的装置、电子设备、非易失性计算机存储介质与方法是对应的,因此,装置、电子设备、非易失性计算机存储介质也具有与对应方法类似的有益技术效果,由于上面已经对方法的有益技术效果进行了详细说明,因此,这里不再赘述对应装置、电子设备、非易失性计算机存储介质的有益技术效果。
在20世纪90年代,对于一个技术的改进可以很明显地区分是硬件上的改进(例如,对二极管、晶体管、开关等电路结构的改进)还是软件上的改进(对于方法流程的改进)。然而,随着技术的发展,当今的很多方法流程的改进已经可以视为硬件电路结构的直接改进。设计人员几乎都通过将改进的方法流程编程到硬件电路中来得到相应的硬件电路结构。因此,不能说一个方法流程的改进就不能用硬件实体模块来实现。例如,可编程逻辑器件(ProgrammableLogic Device,PLD)(例如现场可编程门阵列(Field Programmable Gate Array,FPGA))就是这样一种集成电路,其逻辑功能由用户对器件编程来确定。由设计人员自行编程来把一个数字***“集成”在一片PLD上,而不需要请芯片制造厂商来设计和制作专用的集成电路芯片。而且,如今,取代手工地制作集成电路芯片,这种编程也多半改用“逻辑编译器(logic compiler)”软件来实现,它与程序开发撰写时所用的软件编译器相类似,而要编译之前的原始代码也得 用特定的编程语言来撰写,此称之为硬件描述语言(Hardware DescriptionLanguage,HDL),而HDL也并非仅有一种,而是有许多种,如ABEL(AdvancedBoolean Expression Language)、AHDL(Altera Hardware Description Language)、Confluence、CUPL(Cornell University Programming Language)、HDCal、JHDL(Java Hardware Description Language)、Lava、Lola、MyHDL、PALASM、RHDL(Ruby Hardware Description Language)等,目前最普遍使用的是VHDL(Very-High-Speed Integrated Circuit Hardware Description Language)与Verilog。本领域技术人员也应该清楚,只需要将方法流程用上述几种硬件描述语言稍作逻辑编程并编程到集成电路中,就可以很容易得到实现该逻辑方法流程的硬件电路。
控制器可以按任何适当的方式实现,例如,控制器可以采取例如微处理器或处理器以及存储可由该(微)处理器执行的计算机可读程序代码(例如软件或固件)的计算机可读介质、逻辑门、开关、专用集成电路(Application SpecificIntegrated Circuit,ASIC)、可编程逻辑控制器和嵌入微控制器的形式,控制器的例子包括但不限于以下微控制器:ARC 625D、Atmel AT91SAM、MicrochipPIC18F26K20以及Silicone Labs C8051F320,存储器控制器还可以被实现为存储器的控制逻辑的一部分。本领域技术人员也知道,除了以纯计算机可读程序代码方式实现控制器以外,完全可以通过将方法步骤进行逻辑编程来使得控制器以逻辑门、开关、专用集成电路、可编程逻辑控制器和嵌入微控制器等的形式来实现相同功能。因此这种控制器可以被认为是一种硬件部件,而对其内包括的用于实现各种功能的装置也可以视为硬件部件内的结构。或者甚至,可以将用于实现各种功能的装置视为既可以是实现方法的软件模块又可以是硬件部件内的结构。
上述实施例阐明的***、装置、模块或单元,具体可以由计算机芯片或实体实现,或者由具有某种功能的产品来实现。一种典型的实现设备为计算机。具体的,计算机例如可以为个人计算机、膝上型计算机、蜂窝电话、相机电话、智能电话、个人数字助理、媒体播放器、导航设备、电子邮件设备、游戏控制 台、平板计算机、可穿戴设备或者这些设备中的任何设备的组合。
为了描述的方便,描述以上装置时以功能分为各种单元分别描述。当然,在实施本说明书一个或多个实施例时可以把各单元的功能在同一个或多个软件和/或硬件中实现。
本领域内的技术人员应明白,本说明书实施例可提供为方法、***、或计算机程序产品。因此,本说明书实施例可采用完全硬件实施例、完全软件实施例、或结合软件和硬件方面的实施例的形式。而且,本说明书实施例可采用在一个或多个其中包含有计算机可用程序代码的计算机可用存储介质(包括但不限于磁盘存储器、CD-ROM、光学存储器等)上实施的计算机程序产品的形式。
本说明书是参照根据本说明书实施例的方法、设备(***)、和计算机程序产品的流程图和/或方框图来描述的。应理解可由计算机程序指令实现流程图和/或方框图中的每一流程和/或方框、以及流程图和/或方框图中的流程和/或方框的结合。可提供这些计算机程序指令到通用计算机、专用计算机、嵌入式处理机或其他可编程数据处理设备的处理器以产生一个机器,使得通过计算机或其他可编程数据处理设备的处理器执行的指令产生用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的装置。
这些计算机程序指令也可存储在能引导计算机或其他可编程数据处理设备以特定方式工作的计算机可读存储器中,使得存储在该计算机可读存储器中的指令产生包括指令装置的制造品,该指令装置实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能。
这些计算机程序指令也可装载到计算机或其他可编程数据处理设备上,使得在计算机或其他可编程设备上执行一系列操作步骤以产生计算机实现的处理,从而在计算机或其他可编程设备上执行的指令提供用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的步骤。
在一个典型的配置中,计算设备包括一个或多个处理器(CPU)、输入/输出 接口、网络接口和内存。
内存可能包括计算机可读介质中的非永久性存储器,随机存取存储器(RAM)和/或非易失性内存等形式,如只读存储器(ROM)或闪存(flash RAM)。内存是计算机可读介质的示例。
计算机可读介质包括永久性和非永久性、可移动和非可移动媒体可以由任何方法或技术来实现信息存储。信息可以是计算机可读指令、数据结构、程序的模块或其他数据。计算机的存储介质的例子包括,但不限于相变内存(PRAM)、静态随机存取存储器(SRAM)、动态随机存取存储器(DRAM)、其他类型的随机存取存储器(RAM)、只读存储器(ROM)、电可擦除可编程只读存储器(EEPROM)、快闪记忆体或其他内存技术、只读光盘只读存储器(CD-ROM)、数字多功能光盘(DVD)或其他光学存储、磁盒式磁带,磁带磁磁盘存储或其他磁性存储设备或任何其他非传输介质,可用于存储可以被计算设备访问的信息。按照本文中的界定,计算机可读介质不包括暂存电脑可读媒体(transitory media),如调制的数据信号和载波。
还需要说明的是,术语“包括”、“包含”或者其任何其他变体意在涵盖非排他性的包含,从而使得包括一系列要素的过程、方法、商品或者设备不仅包括那些要素,而且还包括没有明确列出的其他要素,或者是还包括为这种过程、方法、商品或者设备所固有的要素。在没有更多限制的情况下,由语句“包括一个……”限定的要素,并不排除在包括所述要素的过程、方法、商品或者设备中还存在另外的相同要素。
本说明书可以在由计算机执行的计算机可执行指令的一般上下文中描述,例如程序模块。一般地,程序模块包括执行特定任务或实现特定抽象数据类型的例程、程序、对象、组件、数据结构等等。也可以在分布式计算环境中实践说明书,在这些分布式计算环境中,由通过通信网络而被连接的远程处理设备来执行任务。在分布式计算环境中,程序模块可以位于包括存储设备在内的本地和远程计算机存储介质中。
本说明书中的各个实施例均采用递进的方式描述,各个实施例之间相同相似的部分互相参见即可,每个实施例重点说明的都是与其他实施例的不同之处。尤其,对于***实施例而言,由于其基本相似于方法实施例,所以描述的比较简单,相关之处参见方法实施例的部分说明即可。
以上所述仅为本说明书实施例而已,并不用于限制本申请。对于本领域技术人员来说,本申请可以有各种更改和变化。凡在本申请的精神和原理之内所作的任何修改、等同替换、改进等,均应包含在本申请的权利要求范围之内。
Claims (12)
- 一种基于自由视点的编码方法,其特征在于,包括:在服务端,基于多路单视点视频,生成平面拼接图及拼接信息;基于所述平面拼接图,生成平面拼接视频;基于多路单视点视频中存在的摄像机辅助信息,生成所述平面拼接视频的摄像机辅助信息;对所述平面拼接视频、所述拼接信息及所述平面拼接视频的摄像机辅助信息进行编码,生成平面拼接视频码流。
- 如权利要求1所述的方法,其特征在于,所述基于多路单视点视频,生成平面拼接图,具体包括:将所述多路单视点视频中同一时刻采集的图像以拼接矩阵的形式进行拼接,生成第一临时拼接图;将所述多路单视点视频中同一时刻采集的图像对应的深度图以拼接矩阵的形式进行拼接,生成第二临时拼接图;按照预设的拼接方式,将所述第一临时拼接图和所述第二临时拼接图进行拼接,生成平面拼接图。
- 如权利要求2所述的方法,其特征在于,所述预设的拼接方式是指所述将所述第一临时拼接图和所述第二临时拼接图进行拼接时,所述第一临时拼接图和所述第二临时拼接图按照左右方式或者上下方式进行拼接。
- 如权利要求2所述的方法,其特征在于,所述多路单视点视频中同一时刻采集的图像在所述第一临时拼接图中的排布关系与所述多路单视点视频中同一时刻采集的图像对应的深度图在所述第二临时拼接图中的排布关系相同,所述多路单视点视频中各路视点的图像及其对应的深度图分别位于所述第一临时拼接图和所述第二临时拼接图的相同位置。
- 如权利要求1或2所述的方法,其特征在于,所述拼接信息用于记录 所述生成平面拼接图的信息,包括所述多路单视点视频的单视点个数、拼接矩阵的尺寸、所述预设的拼接方式及所述第一临时拼接图或所述第二临时拼接图在所述平面拼接图中的位置。
- 如权利要求1所述的方法,其特征在于,所述基于多路单视点视频中存在的摄像机辅助信息,生成所述平面拼接视频的摄像机辅助信息,具体包括:若所述多路单视点视频的摄像机辅助信息中存在序列级摄像机辅助信息,将所述序列级摄像机辅助信息拼接成为所述平面拼接视频的序列级摄像机辅助信息;若所述多路单视点视频的摄像机辅助信息中存在图像级摄像机辅助信息,将所述图像级摄像机辅助信息拼接成为所述平面拼接视频的图像级摄像机辅助信息。
- 如权利要求1或6所述的方法,其特征在于,所述摄像机辅助信息包括信息长度和信息数据。
- 如权利要求1所述的方法,其特征在于,所述平面拼接视频码流包括序列头、序列级扩展数据段及多个图像数据,其中,所述图像数据包括图像头、图像级扩展数据段和图像编码数据。
- 如权利要求6或8所述的方法,其特征在于,所述拼接信息、所述平面拼接视频的序列级摄像机辅助信息存放于所述平面拼接视频码流的序列级扩展数据段中,所述平面拼接视频的图像级摄像机辅助信息存放于所述平面拼接视频码流的图像级扩展数据段中。
- 一种基于自由视点的编码装置,其特征在于,包括:图像合成单元,在服务端,基于多路单视点视频,生成平面拼接图及拼接信息;视频合成单元,基于所述平面拼接图,生成平面拼接视频;基于多路单视点视频中存在的摄像机辅助信息,生成所述平面拼接视频的摄像机辅助信息;编码单元,对所述平面拼接视频、所述拼接信息及所述平面拼接视频的摄像机辅助信息进行编码,生成平面拼接视频码流。
- 一种基于自由视点的解码方法,其特征在于,包括:在客户端,解码平面拼接视频码流,获得平面拼接图、拼接信息及平面拼接视频的摄像机辅助信息,其中,所述平面拼接视频的摄像机辅助信息包括平面拼接视频的序列级摄像机辅助信息和/或平面拼接视频的图像级摄像机辅助信息;根据所述平面拼接图和所述拼接信息,获得多路单视点视频中各路视频的图像及对应的深度图;根据所述平面拼接视频的摄像机辅助信息,获得所述多路单视点视频中各路视频的摄像机辅助信息;根据观看者的视点信息,将所述多路单视点视频中各路视频的摄像机辅助信息、所述多路单视点视频中各路视频的图像及对应的深度图进行合成,得到虚拟视点。
- 一种基于自由视点的解码装置,其特征在于,包括:解码单元,在客户端,解码平面拼接视频码流,获得平面拼接图、拼接信息及平面拼接视频的摄像机辅助信息,其中,所述平面拼接视频的摄像机辅助信息包括平面拼接视频的序列级摄像机辅助信息和/或平面拼接视频的图像级摄像机辅助信息;图像解析单元,根据所述平面拼接图和所述拼接信息,获得多路单视点视频中各路视频的图像及对应的深度图;视频解析单元,根据所述平面拼接视频的摄像机辅助信息,获得所述多路单视点视频中各路视频的摄像机辅助信息;合成单元,根据观看者的视点信息,将所述多路单视点视频中各路视频的摄像机辅助信息、所述多路单视点视频中各路视频的图像及对应的深度图进行合成,得到虚拟视点。
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