CN104243886A - High-speed image analyzing and video generating technology based on plug-in technology - Google Patents
High-speed image analyzing and video generating technology based on plug-in technology Download PDFInfo
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Abstract
The invention discloses a high-speed image analyzing and video generating technology based on a plug-in technology. The high-speed image analyzing and video generating technology based on the plug-in technology comprises the following steps of (A) designing a uniform interface by using plug-in, converting RAW (read after write) files with different formats into a uniform and standard RAW file structure and uniformizing data interfaces; (B) preprocessing the RAW files, selecting different image conversion and output formats according to demands of a user and judging whether images are zoomed or not, watermarks are added or not and videos are generated or not; and (C) processing RAW images and beginning to processing the RAW files according to the demands of the user after the demands of the user are confirmed. The RAW files serve as an object, and a software technology of quickly converting the different RAW files into appointed image formats and generating videos is realized by using unique plug-in and a double-cache technology. By the plug-in technology, the RAW image files with different formats can be analyzed, application of software is expanded, and the universality of the software is improved; and by the double-cache technology, data reading and data processing are circularly carried out in a crossed manner, and the software analyzing efficiency is greatly improved.
Description
Technical field
The present invention relates to technical field of image processing, particularly relate to a kind of high speed image based on plug-in part technology and resolve and video generation technique.
Background technology
Present stage, the algorithm of the information such as the movement velocity of image calculation object, attitude is utilized to reach its maturity, to the requirement of picture quality also along with calculation accuracy improves constantly.Because RAW form is to image acquired original, the feature of lossless storage and high plasticity is widely used in digital camera and the video camera of industrial technical field.Different from picture formats such as JPG, RAW file take time as the digitized video collection processed without any compression of axle, have recorded the raw information of digital sensor.But while providing high-quality view data for subsequent algorithm, also there is corresponding limitation in RAW.RAW format-pattern cannot directly by Computer display, need to use professional RAW image switching software, the RAW file format of different vendor's definition simultaneously lacks compatible, therefore designs a image switching software can resolving different RAW file format and just seems extremely important.
The equipment such as current digital camera process the file of the file format only comprising a static image data in one file usually with the application software etc. of the picture editting carrying out still image, so, scarcely consider the situation that there is multiple view data in one file.The Exif standard of one of the image file format extensively adopted in digital camera etc. defines, and except guide look display is with except downscaled images (thumbnail image), only comprises a view data in one file.
On the other hand, propose following technology: the view data (main image data) of primary picture (master image) and the view data (auxiliary image data) of sub-picture that associates with this master image are generated as an image file (hereinafter appropriately referred to as multiimage file), and are recorded in recording medium etc.Such as, following technology is described: collected in by multiple JPEG image in a multiimage file to prevent the increase of number of files in Japanese Unexamined Patent Publication 2005-252754 publication, and then, in the beginning of multiimage file to store a master image image of main (representativeness) (in the multiple images collected hereof) according to the form of Exif standard, further, the expansion " JPG " by name of file itself is made.
As the image file for storing multiple JPEG data, by adopting this expansion by name " JPG " and be the structure of the structure identical with existing JPEG form from the file ending started to master image, keep and process the interchangeability between the existing image processing apparatus of JPG file and application program.And, can by have each other relevance image sets, such as under the several different levels of exposure comprising correct exposure, take multiple image sets that Same Scene obtains and be recorded as a multiimage file, so, tool has the following advantages: can reduce number of files, file management becomes easy, image sets reading, copy, transmit, preservation etc. time can the convenience of adding users.
But, in the camera head such as digital camera of current production, as the record format of still image, comprise above-mentioned this JPEG data, adopt the JPG file according to Exif standard as standard.And then, in the camera head of various commercialization, also there is the camera head of following structure: it is except this JPG file, the RAW image that the image taking acquisition is converted under the state after digital signal also can also be saved as RAW file by imaging apparatus.In such camera head, be configured under most cases, desirably can select the logging mode of logging mode, only the preservation RAW file only preserving JPG file, preserve the logging mode etc. of JPG file and RAW file both sides.
The interchangeability of the true JPG file of multiimage file of the multiple image of this storage described in above-mentioned Japanese Unexamined Patent Publication 2005-252754 publication, so, as mentioned above, can carry out showing, edit or preserving in existing image processing apparatus and application program.But, when the multiimage file described in this publication being edited and is preserved by the above-mentioned this existing image processing apparatus based on current Exif standard and application program, although master image is saved, the sub-picture beyond master image is deleted or damage likely.
Therefore, the technology be preferably as follows: even if owing to utilizing existing image processing apparatus and application program to process and damaged auxiliary image data to file, when also can restore auxiliary image data (namely the restoring multiimage file) of this damage, can restore.
Summary of the invention
The object of this invention is to provide a kind of high speed image based on plug-in part technology to resolve and video generation technique, can with RAW file for object, use unique plug-in unit and dual-cache mechanism, realize the rapid translating of different RAW file to designated pictures form and the software engineering of video generation; Plug-in part technology realizes the RAW image document analysis of different-format, the application of expansion software and the versatility of enhancing software; Dual-cache mechanism realizes digital independent to carry out with process cross-circulation, greatly improves the analyzing efficiency of software.
The technical solution used in the present invention is:
High speed image based on plug-in part technology is resolved and a video generation technique, comprises the following steps:
A: utilize insert design unified interface: the RAW file transform of different-format is become unified standard RAW file structure, uniform data interface.
B:RAW file preliminary treatment: can according to user's needs, select different conversions to export picture format, and select whether scaling pictures, add watermark and generating video.
C:RAW image procossing: after user's request is determined, according to user's request, starts to process RAW file.
The processing procedure of described step C:
First in internal memory, open up two block cache districts, what each buffer area stored is a frame pixel data; Create two threads, thread 1 is toward writing in files data in buffer area, and thread 2 pairs of buffer area data process, and the processing procedure of thread 2 pairs of pixel datas is:
A) convergent-divergent is carried out to raw pixel data, according to the pixel format conversion method selected in advance, RAW pixel format conversion is become BMP order;
B) pixel data after conversion adds the BMP file header defined in advance, synthesizes a frame BMP bitmap;
C) on BMP data bitmap, add watermark and synthesize new BMP data bitmap;
D) in avi file, a framing bit diagram data is write.
A kind of high speed image based on plug-in part technology is resolved and video generation technique, comprise multiple parsing card module, the signal output part of multiple parsing card module all connects the signal input part of unified interface module, the signal output part of unified interface module connects the signal input part of pretreatment module, the signal output part image processing module of pretreatment module and the signal input part of Computer image genration module, the input of the signal output part Connection Cache module of image processing module and Computer image genration module.
The present invention is a based on object oriented designing thought, with RAW file for object, uses unique plug-in unit and dual-cache mechanism, realizes the rapid translating of different RAW file to designated pictures form and the software engineering of video generation.Plug-in part technology realizes the RAW image document analysis of different-format, the application of expansion software and the versatility of enhancing software; Dual-cache mechanism realizes digital independent to carry out with process cross-circulation, greatly improves the analyzing efficiency of software.
Due to the heterogeneity of RAW formatted file, the data structure of RAW formatted file and the extension name of file of different vendor are also not quite similar.The software designed herein is based on Object--oriented method, plug-in part technology and dual-cache mechanism is adopted to resolve RAW image file, software is made not only to have very strong versatility, both the RAW image document analysis of different-format had been applicable to, be applicable to again the conversion between RAW picture format different from other, and substantially increase the analyzing efficiency of image, there is very strong use value.
Accompanying drawing explanation
Fig. 1 is theory diagram of the present invention;
Fig. 2 is Double buffer dissection process flow chart of the present invention.
Embodiment
As illustrated in fig. 1 and 2, the present invention includes multiple parsing card module, the signal output part of multiple parsing card module all connects the signal input part of unified interface module, the signal output part of unified interface module connects the signal input part of pretreatment module, the signal output part image processing module of pretreatment module and the signal input part of Computer image genration module, the input of the signal output part Connection Cache module of image processing module and Computer image genration module.
The high speed image that the present invention is based on plug-in part technology is resolved and video generation technique, comprises the following steps:
A: utilize insert design unified interface: the RAW file transform of different-format is become unified standard RAW file structure, uniform data interface.
B:RAW file preliminary treatment: can according to user's needs, select different conversions to export picture format, and select whether scaling pictures, add watermark and generating video.
C:RAW image procossing: after user's request is determined, according to user's request, starts to process RAW file.
The processing procedure of described step C:
First in internal memory, open up two block cache districts, what each buffer area stored is a frame pixel data; Create two threads, thread 1 is toward writing in files data in buffer area, and thread 2 pairs of buffer area data process, and the processing procedure of thread 2 pairs of pixel datas is:
A) convergent-divergent is carried out to raw pixel data, according to the pixel format conversion method selected in advance, RAW pixel format conversion is become BMP order;
B) pixel data after conversion adds the BMP file header defined in advance, synthesizes a frame BMP bitmap;
C) on BMP data bitmap, add watermark and synthesize new BMP data bitmap;
D) in avi file, a framing bit diagram data is write.
The present invention is divided into two parts according to function.Part I is Interface design module, the parsing form of different RAW files is set with card format, the essence of plug-in unit is carried out strengthening to software function under the prerequisite of not update routine main body and expands, by defining one group of card i/f, plug-in unit is associated with main program, plug-in unit can be write for specific card i/f, and this plug-in unit is dynamically inserted in software systems, to realize the Function Extension of system; Part II is processing module (main program), with RAW file for object, carries out the picture of the parsing of reference format and specified format to RAW file, video generates.In order to improve processing speed, adopt dual-cache mechanism here, in internal memory, open up two block cache districts, buffer size is determined by image size, and what each buffer area stored is a frame image data; Create two threads, thread 1(reads thread) for data are write buffer area, thread 2(processing threads) then for the treatment of the data in buffer area, idiographic flow is as shown in Figure 2.
The essence of plug-in unit is carried out strengthening to software function under the prerequisite of not update routine main body and expands, by defining one group of card i/f, plug-in unit is associated with main program, plug-in unit can be write for specific card i/f, and this plug-in unit is dynamically inserted in software systems, to realize the Function Extension of system.
The plug-in unit of the present invention's design is that the RAW file transform of different-format is become unified RAW file structure, uniform data interface.Standard RAW file is made up of file header and view data two parts, and wherein file header is in order to Description Image data, and comprise the information of the resolution of the length and width of image, frame number and pixel etc., view data is then the data message of each pixel of image.The present invention's application Target-oriented thought, the parsing plug-in unit that the RAW document design for different-format is different, such as Sony resolve plug-in unit be exactly the camera of Sony company produce RAW file transform be reference format.
For step B, software Part II (main program) processes RAW file according to the parsing form of specifying, and comprises the picture converting different-format to, scaling pictures, interpolation watermark, generating video etc.
The preliminary treatment of RAW file
1) can, according to user's needs, different conversions be selected to export picture format;
2) can according to user's needs, select whether scaling pictures with add watermark.
RAW image process
After the preliminary treatment of RAW file, according to user's request, start to process RAW file.In order to improve processing speed, the present invention adopts dual-cache mechanism, and in internal memory, open up two block cache districts, buffer size is determined by image size, and what each buffer area stored is a frame image data; Create two threads, thread 1(reads thread) for data are write buffer area, thread 2(processing threads) then for the treatment of the data in buffer area, idiographic flow is as shown in Figure 2.
During the preliminary treatment of RAW file, select to be provided with image converting method according to user, the processing procedure of thread 2 pairs of pixel datas is:
1) according to the pixel format conversion method selected in advance, RAW pixel transitions is become a width picture;
2) according to demand convergent-divergent carried out to picture and add watermark.
Below a kind of high speed image based on plug-in part technology that the present invention proposes is resolved and video generation technique, be described in detail by reference to the accompanying drawings.Comprise the steps:
1. utilize insert design unified interface: the RAW file transform of different-format is become unified standard RAW file structure, uniform data interface.
2. RAW file preliminary treatment: can according to user's needs, select different conversions to export picture format, and select whether scaling pictures, add watermark and generating video.
3. RAW image process: after user's request is determined, according to user's request, starts to process RAW file.
The present invention can, according to the selection of user, provide the conversion of the video formats such as WMV, RMVB, AVI, MPEG to export.Video product process is similar to RAW document analysis flow process, in picture processing process, calls corresponding video generating algorithm standard RAW file transform is become video file in thread 2.
The real-time example of one of the present invention further illustrates as follows:
In the present embodiment, utilize Sony resolve plug-in unit be exactly the camera of Sony company produce RAW file transform be reference format, comprise file header and data file, then document analysis become BMP picture and generate AVI format video file.The step of this example is as follows:
Step 1. unified interface
The RAW file format of the camera generation of known Sony company, utilizes Sony to resolve plug-in unit and arranges the data structure corresponding with file: data type and shared byte number, and result is saved in Sony.ini file; Then RAW file cache file information is reference format is read, RAW normative document is made up of file header and view data two parts, wherein file header is in order to Description Image data, comprise the information such as the resolution of the length and width of image, frame number and pixel, view data is then the data message of each pixel of image.
The preliminary treatment of step 2.RAW file
Whether convergent-divergent is carried out to picture, be, convergent-divergent multiple is set; Select BMP picture format; Whether on picture, add watermark, be, word is set; Select to generate AVI format video, and select video file memory address that video name is set.After selection is determined, define BMP file header and pixel transitions form according to known picture length and width and convergent-divergent multiple, the header file of avi file is set.
Step 3.RAW image procossing
The present invention opens up two block cache districts in internal memory, and what each buffer area stored is a frame pixel data; Create two threads, thread 1 is toward writing in files data (reading thread) in buffer area, and thread 2 pairs of buffer area data process (processing threads), and the processing procedure of thread 2 pairs of pixel datas is:
A) convergent-divergent is carried out to raw pixel data, according to the pixel format conversion method selected in advance, RAW pixel format conversion is become BMP order;
B) pixel data after conversion adds the BMP file header defined in advance, synthesizes a frame BMP bitmap;
C) on BMP data bitmap, add watermark and synthesize new BMP data bitmap;
D) in avi file, a framing bit diagram data is write.
RAW formatted file disunity from the beginning, the data structure of RAW formatted file and the extension name of file of different vendor are also not quite similar.The software designed herein is based on Object--oriented method, plug-in part technology and dual-cache mechanism is adopted to resolve RAW image file, software is made not only to have very strong versatility, both the RAW image document analysis of different-format had been applicable to, be applicable to again the conversion between RAW picture format different from other, and substantially increase the analyzing efficiency of image, there is very strong use value.Table 1 is the comparative result of conventional analytic method and use Double buffer analytic technique under equal hardware device condition.
Table 1 experimental result
| Method | Speed |
| Conventional method | 25 frames/second |
| Dual-cache mechanism | 50 frames/second |
Claims (3)
1. the high speed image based on plug-in part technology is resolved and a video generation technique, it is characterized in that: comprise the following steps:
A: utilize insert design unified interface: the RAW file transform of different-format is become unified standard RAW file structure, uniform data interface;
B:RAW file preliminary treatment: can according to user's needs, select different conversions to export picture format, and select whether scaling pictures, add watermark and generating video;
C:RAW image procossing: after user's request is determined, according to user's request, starts to process RAW file.
2. the high speed image based on plug-in part technology according to claim 1 is resolved and video generation technique, it is characterized in that: the processing procedure of described step C:
First in internal memory, open up two block cache districts, what each buffer area stored is a frame pixel data; Create two threads, thread 1 is toward writing in files data in buffer area, and thread 2 pairs of buffer area data process, and the processing procedure of thread 2 pairs of pixel datas is:
A) convergent-divergent is carried out to raw pixel data, according to the pixel format conversion method selected in advance, RAW pixel format conversion is become BMP order;
B) pixel data after conversion adds the BMP file header defined in advance, synthesizes a frame BMP bitmap;
C) on BMP data bitmap, add watermark and synthesize new BMP data bitmap;
D) in avi file, a framing bit diagram data is write.
3. the high speed image based on plug-in part technology according to claim 2 is resolved and video generation technique, it is characterized in that: comprise multiple parsing card module, the signal output part of multiple parsing card module all connects the signal input part of unified interface module, the signal output part of unified interface module connects the signal input part of pretreatment module, the signal output part image processing module of pretreatment module and the signal input part of Computer image genration module, the input of the signal output part Connection Cache module of image processing module and Computer image genration module.
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