sgm | Semi-Global Matching on the GPU | GPU library
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Semi-Global Matching on the GPU
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QUESTION
I'm trying to parse a text file with javascript. I have no control over the contents of the text file.
The text file consists of multiple records. Each record begins with a HH:MM timestamp. Each record is separated by a double line break \n\n. Records may be a single line, or may be multiple lines separated by a single line break \n.
example:
...ANSWER
Answered 2021-Mar-24 at 00:38m multiline modifier, will never work, since then its only procesing one line at a time.
without m ^ will only match beginning of text.
The usual newline wildcard is [^] (not nothing), but this will match until last new line.
There might be a way with regex
But you could consider .split("\n\n") instead
QUESTION
The following code counting words in directory from all ".sgm" files. But I need to get counted words in all ".sgm" files between BODY tags for example.
How can I do that?
...ANSWER
Answered 2021-Jan-21 at 06:08What I see in your question is you trying to create xml formatted content, and trying to deserialize it just to count the content, that would be fine if you need to collect data, but if the intention is only to count words tagged in between body of documents it is much faster to just parse it and count it on the fly.
My strategy is to take substring of content that starts with and take the substring that ends with and count it by splitting it.
Here is the solution:
QUESTION
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
namespace FunkcjaSpilit
{
class Program2
{
static int _MinWordLength = 7;
static void Main()
{
DirectoryInfo filePaths = new DirectoryInfo(@"D:\project_IAD");
FileInfo[] Files = filePaths.GetFiles("*.sgm");
List firstone = new List();
foreach (FileInfo file in Files)
{
int longWordsCount = CalculateLongWordsCount(file, _MinWordLength);
string justFileName = file.Name;
firstone.Add(longWordsCount);
Console.WriteLine(("W pliku: " + justFileName) + " liczba długich słów to " + longWordsCount);
}
Console.WriteLine(firstone.Count);
Console.ReadLine();
}
private static int CalculateLongWordsCount(FileInfo file, int _MinWordLength)
{
return File.ReadLines(file.FullName).
Select(line => line.Split(' ').Count(word => word.Length > _MinWordLength)).Sum();
}
}
}
ANSWER
Answered 2021-Jan-09 at 17:34You're print the list length in the line:
QUESTION
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
namespace FunkcjaSpilit
{
class Program2
{
static int _MinWordLength = 7;
static void Main()
{
DirectoryInfo filePaths = new DirectoryInfo(@"D:\project_IAD");
FileInfo[] Files = filePaths.GetFiles("*.sgm");
List firstone = new List();
foreach (FileInfo file in Files)
{
int longWordsCount = CalculateLongWordsCount(file, _MinWordLength);
Console.WriteLine("W tekscie numer: " + firstone.IndexOf(file) + " liczba długich słów to " + longWordsCount);
}
Console.ReadLine();
}
private static int CalculateLongWordsCount(FileInfo file, int minWordLength)
{
return file.Split(' ').Where(wordInText => wordInText.Length >= minWordLength).Count();
}
}
}
ANSWER
Answered 2021-Jan-06 at 19:54I see two problems in the code. Both of them come from not understanding what the FileInfo struct is for. I'll fix one of the errors, and leave you to learn from my fix to do the second yourself.
QUESTION
I do not know how to free all memory used, especially for GHashTable. I have something like this:
...ANSWER
Answered 2020-Dec-14 at 02:09If created with g_hash_table_new_full(), then g_hash_table_destroy() will call the provided key free function and value free function on all the keys and values in the hash table. So you don't have to free them yourself. If you do, then you will be freeing them twice, which is why you get the segfault.
If you used g_hash_table_new(), or you gave NULL as the key free function and/or value free function, then you do have to free them yourself.
QUESTION
My function reads multiple .sgm files. I get an error when reading the content from the file speficially at line contents = f.read()
ANSWER
Answered 2020-Sep-25 at 00:13Try this: with open(path, 'rb') as f: That b in the mode specifier in the open() states that the file shall be treated as binary, so contents will remain a bytes. No decoding attempt will happen this way. More details at: this link
QUESTION
I am working on a hardware-based solution ( without GPU) for dense optical flow to get real-time performance @ 30fps with decent accuracy. Something comparable to or better than NVIDIA’s optical flow SDK. Can someone please suggest good algorithms other than Pyramidal Lukas Kanade and horn Schunck. I found SGM as a good starting point but it’s difficult to implement on FPGA or DSP core. The target is to measure large displacements with occlusion as well as similar to real-world videos.
It would be great if someone could tell what exactly algorithm NVIDIA has used.
...ANSWER
Answered 2020-Sep-21 at 04:59For dense optical flow estimation in real-time setup, FlowNet is a good option. It can achieve optical flow estimation at a higher FPS. You can take their trained model to perform inference. Since you want to run the estimation in a non-GPU environment, you can try converting the model to ONNX format. A good implementation of FlowNet is available in NVIDIA's Github repo. I am not sure exactly which algorithm NVIDIA is using in its SDK for optical flow.
The FlowNet2 is built upon previous work of FlowNet to compute large displacement. However, if you are concerned about occlusion then you may check out their follow up work on FlowNet3. Another alternative to FlowNet is PwC-Net.
QUESTION
I have an array of JSON objects fetched through an API call, stored in a variable named dataInfo : any,
ANSWER
Answered 2020-May-19 at 12:29Considering you have imported & declared HttpClient & HttpClientModule correctly. You can do the following,
QUESTION
I am trying to match / find (for removal) all carriage return and line feed instances between 2 strings that are recurring within same file.
Example:
...ANSWER
Answered 2020-Mar-28 at 18:21This does the job:
- Find:
(Reason for test|\G).*?\K\R(?=(?:(?!Reason for test)[\s\S])*?\RPre-conditions Scenario) - Replace:
(a space)
QUESTION
This is a follow on question to Select block of text and merge into new document
I have a SGM document with comments added and comments in my sgm file. I need to extract the strings in between the start/stop comments so I can put them in a temporary file for modification. Right now it's selecting everything including the start/stop comments and data outside of the start/stop comments.
...ANSWER
Answered 2019-Oct-25 at 20:29You can read the entire file and split it into an array using the string array of {"", ""} to split, into this
- Element 0: Text before
"" - Element 1: Text between
""and"" - Element 2: Text after
""
and take element 1. Then write it to your backup.
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