extraction

OpenCV: How to get inlier points using findHomography()/findFundamental() and RANSAC

♀尐吖头ヾ 提交于 2019-11-29 08:11:45
问题 OpenCV does not provide a RANSAC-function per se or at least in such a form that you can just call it and be done with it (e.g. cv::ransac(...) ). All functions/methods that are able to use RANSAC have a flag that enables it. However this is not always useful if you actually want to do something else with the inliers RANSAC computes after you have estimated a homography/fundamental matrix for example create a nice plot in Octave or similar software/library of the points, apply additional

Masking a blob from a binary image

流过昼夜 提交于 2019-11-29 05:02:11
I am doing motion recognition of walking using openCV and C++ and I would like to create a mask or copied image in order to achieve the effect seen in the picture provided. .The following is an explanation of the images The resulting blob of the human walking is seen. Then, a mask image or copied image of the original frame is created, the binary human blob is now masked and the non-masked pixels are now set to zero. The result is the extracted human body with a black background. The diagram below shows how the human blob is extracted and then masked. This is to be done for every 5th frame of

Extrakting Zip to SD-Card is very slow. How can i optimize performance?

别等时光非礼了梦想. 提交于 2019-11-29 02:35:52
问题 my app downloads a zip with about 350 files. A mix of JPG and HTML files. The function i wrote to do it works just fine but the unzipping takes for ever. At first i thought the reason might be that writing to the sd-card is slow. but when i unzip the same zip with an other app on my phone it works much faster. is there anything that i could do to optimize it? here is the code: private void extract() { try { FileInputStream inStream = new FileInputStream(targetFilePath); ZipInputStream

Extract files from zip file and retain mod date- Python 2.7.1 on Windows 7

送分小仙女□ 提交于 2019-11-28 21:21:27
I'm trying to extract files from a zip file using Python 2.7.1 (on Windows, fyi) and each of my attempts shows extracted files with Modified Date = time of extraction (which is incorrect). import os,zipfile outDirectory = 'C:\\_TEMP\\' inFile = 'test.zip' fh = open(os.path.join(outDirectory,inFile),'rb') z = zipfile.ZipFile(fh) for name in z.namelist(): z.extract(name,outDirectory) fh.close() I also tried using the .extractall method, with the same results. import os,zipfile outDirectory = 'C:\\_TEMP\\' inFile = 'test.zip' zFile = zipfile.ZipFile(os.path.join(outDirectory,inFile)) zFile

How to get audio data from a MP3?

﹥>﹥吖頭↗ 提交于 2019-11-28 16:54:25
I'm working on an application that has to process audio files. When using mp3 files I'm not sure how to handle data (the data I'm interested in are the the audio bytes, the ones that represent what we hear). If I'm using a wav file I know I have a 44 bytes header and then the data. When it comes to an mp3, I've read that they are composed by frames, each frame containing a header and audio data. Is it possible to get all the audio data from a mp3 file? I'm using java (I've added MP3SPI, Jlayer, and Tritonus) and I'm able to get the bytes from the file, but I'm not sure about what these bytes

How to extract one file with commit history from a git repo with index-filter & co

我们两清 提交于 2019-11-28 16:51:13
My situation was, I have a git repo converted from SVN to HG to GIT, and I wanted to extract just one source file. I also had weird characters like aÌ (an encoding mismatch corrupted Unicode ä) and spaces in the filenames. Seems it's not particularly easy, and that's the reason I'll be answering my own question despite many similar questions regarding git [index-filter|subdirectory-filter|filter-tree], as I needed to use all the previous to achieve this! So the question is: "How can I extract one file from a repository and place it at the root of the new repo?" A faster and easier-to

Extracting information from PDFs of research papers [closed]

夙愿已清 提交于 2019-11-28 16:05:41
I need a mechanism for extracting bibliographic metadata from PDF documents, to save people entering it by hand or cut-and-pasting it. At the very least, the title and abstract. The list of authors and their affiliations would be good. Extracting out the references would be amazing. Ideally this would be an open source solution. The problem is that not all PDF's encode the text, and many which do fail to preserve the logical order of the text, so just doing pdf2text gives you line 1 of column 1, line 1 of column 2, line 2 of column 1 etc. I know there's a lot of libraries. It's identifying the

Text extraction with java html parsers

你。 提交于 2019-11-28 12:55:03
问题 I want to use an html parser that does the following in a nice, elegant way Extract text (this is most important) Extract links, meta keywords Reconstruct original doc (optional but nice feature to have) From my investigation so far jericho seems to fit. Any other open source libraries you guys would recommend? 回答1: I recently experimented with HtmlCleaner and CyberNekoHtml. CyberNekoHtml is a DOM/SAX parser that produces predictable results. HtmlCleaner is a tad faster, but quite often fails

Example of how to use PyLZMA

六月ゝ 毕业季﹏ 提交于 2019-11-28 11:02:52
I want to use PyLZMA to extract a file from an archive (e.g. test.7z) and extract it to the same directory. I'm a newbie to Python and have no idea how to start. I've done some googling and found some examples and docs , but I don't understand how they work. Could someone please post the basic code for what I want to do so that I can start to work and understand? Brian B Here is a Python class to handle the basic functionality. I have used it for my own work: import py7zlib class SevenZFile(object): @classmethod def is_7zfile(cls, filepath): ''' Class method: determine if file path points to a

Extract text from a XPS Document [closed]

元气小坏坏 提交于 2019-11-28 06:19:01
问题 i need to extract the text of a specific page from a XPS document. The extracted text should be written in a string. I need this to read out the extracted text using Microsofts SpeechLib. Please examples only in C#. Thanks 回答1: Add References to ReachFramework and WindowsBase and the following using statement: using System.Windows.Xps.Packaging; Then use this code: XpsDocument _xpsDocument=new XpsDocument("/path",System.IO.FileAccess.Read); IXpsFixedDocumentSequenceReader fixedDocSeqReader =