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Results tagged with reinventing-the-wheel
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user 151754
For when you know you are reinventing the wheel, but are doing it anyways. Questions with this tag involve code that is already fully implemented (such as from a library).
5
votes
Accepted
Moving objects on a grid in C++
The first thing to do to clean up the code would be to make a
struct pos {
int x;
int y;
};
This will simplify the remaining of the code, making it easier to reason about the logic.
For exam …
- 6,237
3
votes
My iterative FFT is slower than my recursive FFT
It is hard to compare implementations seeing only one. It is possible that you can write the algorithm in a different way that makes it more efficient. Seeing only one specific implementation, all we …
- 6,237
3
votes
Unit testing a Linked List implementation in C++
This is going to be a superficial review, I hope someone else will go into details on the C++ code.
I don’t see any issues with your makefile, and don’t understand why you would need to include single …
- 6,237
5
votes
Image Processing Median Filter in C
You’ve got some excellent answers commenting on the code itself. I am here to comment on the algorithm.
It is really hard to implement a color median filter. The median is defined for a set of scalar …
- 6,237
1
vote
Image Processing Sobel Edge Detection in C
There is one thing I thought of when reading your code that hasn’t yet been mentioned in the other two reviews:
for(long long int i = 0; i < (xsize * ysize); i++)
{
if( (i < xsize) || ( (i …
- 6,237
8
votes
Implementation of Linux cp in modern C++
I am going to focus on these two lines of code:
int infd = open(input.c_str(),O_RDONLY);
int outfd = open(output.c_str(),O_WRONLY|O_CREAT|O_EXCL,0664);
Since you are making a point of using modern …
- 6,237
8
votes
Accepted
Two dimensional gaussian image generator in C++
You are obviously on a fantastic quest to understand how to implement image processing operations in all sorts of languages. The tag reinventing-the-wheel tells me that you know that you should use an …
- 6,237
7
votes
Accepted
conv2 Template Function Implementation for Image in C++
Algorithm
I like the algorithm you use. Usually people will implement convolution by doing all computations for one output pixel in the inner two loops. I honestly don't know which is more efficient, …
- 6,237
2
votes
im2double and im2uint8 Functions Implementation for Image in C++
When you create an empty vector, and repeatedly emplace_back() pixels, you do a lot of reallocations that you can avoid by reserve()ing the right number of pixels before the loop.
Next, you put this v …
- 6,237
4
votes
Accepted
imgaussfilt Template Function Implementation for Image in C++
I have strong opinions about the Gaussian filter, don't take this personally. :)
First of all, you should know that the Gaussian filter is separable. That is, you can apply a 1D Gaussian filter to the …
- 6,237
3
votes
convn Template Function Implementation for Image in C++
Continuing G. Sliepen’s answer:
Another strange name is level, it indicates which image dimension the loop works over. It has nothing to do with levels. dimension would be more appropriate, and would …
- 6,237