Omar Rizwan
.
@omar,
Profile for
Omar Rizwan.
Username @omar, social.omar.website.
Role: admin
About
"The program should, in some way, expand the concept of what computer paint programs are, as well as what mark making can be."
Joined on Dec, 2022.
805 posts.
Followed by 297.
Following 153.
Omar Rizwan
.
@omar,
Omar Rizwan
.
@omar,
![do u ever watch someone take a
picture of someone else's phone
screen and feel the angel of omar
give a nod of approval
[heart react]](https://social.omar.website/fileserver/01PG4R73NMJC888MJM2KBM4CFF/attachment/original/01QZNSC0Z04VCWZHSS0ECTX6W0.png)
Omar Rizwan
.
@omar,
Rekt
![The Truth
Source code in opencv
The truth is, as usual, in the source code of opencv. Typically, we see the relevant code blocks,
x0 = x = (x - cx)*ifx;
y0 = y = (y - cy)*ify;
// compensate distortion iteratively
for( j = 0; j < iters; j++ )
{
double r2 = x*x + y*y;
double icdist = (1 + ((k[7]*r2 + k[6])*r2 + k[5])*r2)/(1 + ((k[4]*r2 + k[1])*r2 + k[0])*r2);
double deltaX = 2*k[2]*x*y + k[3]*(r2 + 2*x*x);
double deltaY = k[2]*(r2 + 2*y*y) + 2*k[3]*x*y;
x = (x0 - deltaX)*icdist;
y = (y0 - deltaY)*icdist;
}
This confirmed my guess and the math equations in the opencv tutorial is not correct.](https://social.omar.website/fileserver/01PG4R73NMJC888MJM2KBM4CFF/attachment/original/01M8VPTJTBYHK78C48QP46Y57Y.png)
Omar Rizwan
.
@omar,
feel like the older i get the more i'm like, nothing on the internet can be relied on to last at its original location, and people should copy and paste / blockquote as much as possible so that the information is more likely to survive in at least 1 place https://mastodon.coffee/@shammers/111574867456966246
Omar Rizwan
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@omar,
Omar Rizwan
.
@omar,
I've been getting back on the RFID train lately with pretty good results, feels like I've broken through where I was stuck on this refactor a couple months ago --
Omar Rizwan
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@omar,
Omar Rizwan
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@omar,
Rotations day today
Omar Rizwan
.
@omar,
Omar Rizwan
.
@omar,
"The need for a fortran compiler was a big part of the original rationale for the divide of numpy and scipy when they replaced numeric. Numpy was meant to be the lighweight/core version of things, and scipy was the full-fledged environment."