SVO | Semi-Direct Monocular Visual Odometry（深度滤波部分代码解析） | Dataset library
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Semi-Direct Monocular Visual Odometry（深度滤波部分代码解析）：深度滤波相关代码解析札记，不包含跟踪部分代码的解析！.
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Currently covering the most popular Java, JavaScript and Python libraries. See a Sample of SVO
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QUESTION
I am trying to search for 3 letter target words and replace them with corrected 3 letter words.
e.g. CHI - SHA as a single cell entry (with hyphen) to be replaced with "ORD -" etc.
There will be instances where the target word is part of a word pair within a cell, e.g. CHI - SHA.
The code below works to capture all of the cases but I realized that when the the cell is e.g. XIANCHI - SHA it would also correct the part "CHI -" resulting in XIANORD - SHA.
How can I limit the fndlist to skip the target letters if they are part of a longer word?
Sample
- CHI - (single cell entry) converts to ORD -
- CHI - PVG (one cell) converts to ORD - PVG
- XIANCHI - PVG converts to XIANORD - PVG (error)
If I use lookat:xlwhole the code would only catch the CHI - case but not the pair but if I use xlpart it will catch the pair CHI - PVG but also corrects any word it finds with that element.
thanks for any help
...ANSWER
Answered 2020-Nov-06 at 20:29Edit: I wanted to give you something a bit more complete. In the below code, I used a separate function that creates a map between before and after values. This cleans up the code because now all of these values are stored in one place (also easier to maintain). I use this object to then create the search pattern, since a regular expression can search for multiple patterns at once. Finally, I use the dictionary to return the replacement value. Try this revised code, and see if it better meets your use case.
I ran quick performance test to see if it performed better/worse than built-in VBA replace function. In my test, I used only three of the possibilities in my regular expression search/replace, and I ran a test against 103k rows. It performed equally as well as a built-in search and replace using only one value. The search and replace would have had to be re-run for each of the search values.
Let me know if this helps.
QUESTION
I'd like to change the return value according to the conditions without using the object. How I can do that with Generics (if possible)?
...ANSWER
Answered 2019-Aug-20 at 06:33Not possible, and not a good idea!
X and "list of X" aren't the same type, and there is no way to express that using generics either. You see, generics are a compile time concept. Generics don't play much of a role at runtime. Thus a potential caller would not even know at compile time what will come back.
And more importantly: this is also not good design practice. A caller should know what comes back, otherwise you put the burden on each caller of that method to distinguish the various possible results.
Thus, the real answer: simply always return a list. In one case, with one element, otherwise with more elements! (or, to be precise: in the second case, you simply don't know how many elements will be coming back, 0, 1, 42, who knows).
QUESTION
While I was reading an open-source code, I found the following where a shared pointer is passed to a function in two different ways.
class A{A();};
typedef std::shared_ptr A_Ptr;
void func1(A_Ptr a);
void func2( const A_Ptr& a);
What is the reason to pass it as a reference when const is used? I understand the writer of the func2 does not expect the function to be able to change anything in a. But can't we just do this const A_Ptr a? Also, what are the reason we shouldn't pass it with A_Ptr & a in func1?
Occurance of the above in the code:
Git: https://github.com/uzh-rpg/rpg_svo/
void FrameHandlerMono::setFirstFrame(const FramePtr& first_frame)
...ANSWER
Answered 2019-Aug-07 at 02:55But can't we just do this
const FramePtrframe?
Sure, we could, but then the copy constructor would be invoked, which is for larger types (anything larger than the built-in types) normally more expensive than passing by reference. This is nothing specific to shared_ptr. It should be generally your default to pass any objects by const reference if you don't need a copy and don't want to change them. Only built-in types like int, float, or char should be passed-by-value.
More interesting is why func1 uses a copy. Most probable case is that he needs a copy anyway, because he wants to keep a reference in the class. I couldn't find the exact file you're refering to in the github repository you've posted. If it's still unclear please past the function body of func1 into the question.
Edit: Ah, I see. Looks like the reason he passes-by-value here, has more to do with thread-safety. Didn't read the whole but otherwise the shared_ptr might be deleted by the owning thread if he passed by const reference.
Here for examle func needs pass-by-value cause otherwise the pointer could be deleted by the main thread. Probably something like this but more complicated:
QUESTION
Appreciate any help on this task!
I'm trying to have this dash app take slider input value to change a variable through a function and then change the marker colour variable only.
The code is written in python and uses plotly-dash and plotly and as well as pandas numpy and mapbox.
The top part of the code is getting the data into the right format. It has traffic data which is being processed to product a heatmap that shows congestion over time on a map. The dataframe DF is for volume of traffic, and the dataframe HF was created so the slider would work (i added a column numbered 0 to number of columns to use with the slider) - the function datatime should choose the volumes based on the time and the detector ID.
I originally created this functionality with javascript as shown here - https://jsbin.com/detejef/edit?html,js,output
I've been working at this code for awhile. Very close to finally getting a prototype but have this one snag - the variable of time doesn't update properly and reupdate the map with the detector changes...
I just need marker dictionary sub function colour to change with the slider value changing in conjunction with the functions I've created. The function works by itself.
This is an update to the code.
...ANSWER
Answered 2019-May-23 at 05:47The issue here was the slider was inputing values like 9.19 which has no column to filter too.
The way i solved this issue was too implement a floor using numpy array through the datetime function. this meant it only used values that were full number integers.
QUESTION
I intend to identify the sentence structure in English using spacy and textacy.
For example: The cat sat on the mat - SVO , The cat jumped and picked up the biscuit - SVV0. The cat ate the biscuit and cookies. - SVOO.
The program is supposed to read a paragraph and return the output for each sentence as SVO, SVOO, SVVO or other custom structures.
Efforts so far:
...ANSWER
Answered 2018-Mar-28 at 09:14Issue 1: The SVO are overwritten. Why?
This is textacy issue. This part is not working very well, see this blog
Issue 2: How to identify the sentence as SVOO SVO SVVO etc.?
You should parse the dependency tree. SpaCy provides the information, you just need to write a set of rules to extract it out, using .head, .left, .right and .children attributes.
QUESTION
I want to create a table with two different arrays with different dimension but after executing it does not give me proper output.
I have below code:
...ANSWER
Answered 2018-Nov-01 at 17:08I'm guessing you're getting Text1 | Text2 | Text3 | for every heading.
You shouldn't be assigning j = 0 in every loop. initialize an int index=0 outside of both for loops and the inner for loop should look like this.
QUESTION
I have one String value which I am getting from one of svo,
i.e. String reply=svo.getReplies();
The output that I am getting is like --> "1:true,2:false,3:true,4:false,5:false,6:false"
Now what I want is to separate storage of the reply and store all replies in new variables for every reply. For example:
...ANSWER
Answered 2018-Oct-11 at 10:17That is not possible in java unless you use a for loop, how ever you can use String#split(","); to split the string into a String[]
QUESTION
I'm getting the description from some RSS feed websites, Some of these description contain images and specific text I want to remove.
The code to get the feed:
...ANSWER
Answered 2018-Jul-05 at 06:37Code: (Demo)
QUESTION
I have an array with many nested arrays and objects. My code doesn't work and after looking at it over and over again, I don't understand why. Its hard to explain what I mean (sorry if my title question was also not very clear, but I didn't know how to explain what I mean, if I don't know whats wrong in my code), so I put my 2 questions insight my code as comments - I hope its understandable! Thanks a lot for any ideas.
...ANSWER
Answered 2017-Oct-22 at 15:21Your code works. Here is how to make an embedded code snippet on Stackoverflow :
QUESTION
I would like to merge cells in 2d list, new rows are merged on next empty row. struggling with the logic to design this. I parsed an html table and turn it into 2 dimensional list and would like to merge rows that separated by empty rows. eg.
...ANSWER
Answered 2017-Sep-27 at 08:40Your may create a list comprehension using zip and itertools.groupby to achieve this as:
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