radical | Tools for radiometric calibration of consumer RGB cameras | Camera library
kandi X-RAY | radical Summary
kandi X-RAY | radical Summary
Consumer-grade color cameras suffer from significant optical nonlinearities, often referred to as vignetting effects. For example, in Asus Xtion Pro Live cameras the pixels in the corners are two times darker than those in the center of the image. The vignetting effects in Intel RealSense cameras are less severe, but are still noticeable, as can be seen below:.
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Currently covering the most popular Java, JavaScript and Python libraries. See a Sample of radical
radical Key Features
radical Examples and Code Snippets
find_package(radical CONFIG REQUIRED)
target_link_libraries(your_target radical)
cmake .. -Dradical_DIR=/lib/cmake/radical
#include
#include
radical::RadiometricResponse rr("calibration-file-path.crf");
radical::VignettingResponse vr("calibrati
Community Discussions
Trending Discussions on radical
QUESTION
I tried 5 different implementations of the Sobel operator in Python, one of which I implemented myself, and the results are radically different.
My questions is similar to this one, but there are still differences I don't understand with the other implementations.
Is there any agreed on definition of the Sobel operator, and is it always synonymous to "image gradient"?
Even the definition of the Sobel kernel is different from source to source, according to Wikipedia it is [[1, 0, -1],[2, 0, -2],[1, 0, -1]]
, but according to other sources it is [[-1, 0, 1],[-2, 0, 2],[-1, 0, 1]]
.
Here is my code where I tried the different techniques:
...ANSWER
Answered 2021-Jun-15 at 14:22according to wikipedia it's [[1, 0, -1],[2, 0, -2],[1, 0, 1]] but according to other sources it's [[-1, 0, 1],[-2, 0, 2],[-1, 0, 1]]
Both are used for detecting vertical edges. Difference here is how these kernels mark "left" and "right" edges.
For simplicity sake lets consider 1D example, and let array be
[0, 0, 255, 255, 255]
then if we calculate using padding then
- kernel
[2, 0, -2]
gives[0, -510, -510, 0, 0]
- kernel
[-2, 0, 2]
gives[0, 510, 510, 0, 0]
As you can see abrupt increase in value was marked with negative values by first kernel and positive values by second. Note that is is relevant only if you need to discriminate left vs right edges, when you want just to find vertical edges, you might use any of these 2 aboves and then get absolute value.
QUESTION
I'm trying to write a simple program that extracts the numbers and operands outside the last pair of parenthesis, i'm trying to achieve this by employing a simple recursive function, however, my code is printing nothing. What's wrong with the code?
...ANSWER
Answered 2021-Jun-14 at 20:52The problem is with the wrong stopping condition which is leading to an infinite recursion in this line if(x[y] != '('){
. You just need to put that condition in the end or you can ignore it all.
QUESTION
A friend and I are writing a document in R Markdown, which includes some super basic phylogenetic tree diagrams. We have run into a strange issue, where the same R markdown document produces different looking plots depending on which one of us knits the document. On my friend's machine, the plots look fine. On my machine, the borders of the plot look radically different, creating excess whitespace around the diagram.
The code we're using is as follows:
...ANSWER
Answered 2021-May-26 at 14:25That is because your friend's machine has tools to crop figures: pdfcrop
and ghostscript
. These tools are probably not installed on your machine. Since you didn't provide your sessionInfo()
, I don't know your platform, so it's hard to provide specific instructions on installation. If your LaTeX distribution is TinyTeX, pdfcrop
can be installed via tinytex::tlmgr_install('pdfcrop')
. Note that if you are on Windows, you will need to install Perl for pdfcrop
. If you are on macOS, ghostscript
can be installed via Homebrew.
QUESTION
My dataset, sharks for example, contains a variable of the species name, classified as a factor, and a variable month, also classified as a factor. What I want to do is create a separate bar chart for each month to show the number of each species caught in that month. Alternatively, a single stacked bar chart to show all 12 months. I've started a ggplot code, however, I don't know what to use as the y variable, as that should be the count for each species.
...ANSWER
Answered 2021-May-26 at 04:47You can use count
to find the count of Species in each month. Try -
QUESTION
I am adding sections to our website and all but one of them are working the way I want: i.e. no margin between sections.
I'm not able to get this one page's sections to have no margin between sections; they have extra space beneath. I have went over the code with a fine tooth comb and cannot find the error.
I am first including the code of a sample page that works correctly:
...ANSWER
Answered 2021-May-20 at 17:39What you are experiencing is called "collapsing margins". Example: If there's an h2
as the first child element inside a div, and the div has no margins, the top margin of the h2
will "go outside the div" at the top - h1, h2 etc. tags have a default margins in practically all browsers (which is a browser setting). To prevent that, you can define all margins for according elements as zero, like I did below with
QUESTION
In an effort to make my form more accessible, what I'm trying to figure out is that if the user presses enter on either the Agree
or Disagree
button, the tab-focus should skip to the next agree
button. I've added a class to every instance of Agree
buttons (next-btn
), so now I just need to write a function that focuses on the next instance of next-btn
.
The HTML is as follows:
...ANSWER
Answered 2021-May-11 at 18:03So I used Array#forEach
to iterate through the array and get the index of the button.
So I use the buttons
array because it contains all the button.button-label
elements, and the .next-btn
elements have the .button-label
class.
So I slice the buttons
array to return all the items in the array after the one that called the focusHere
function, and found the first item or instance of the .next-btn
element
QUESTION
I am sure about that there aren't any mistakes in my class. I can't give all codes because the program is big. The program is about radical numbers. Such as converting √8 to 2√2. I am going to use this class in my main python file. Here are the codes:
...ANSWER
Answered 2021-May-05 at 17:33 if (kontroldegiskeni + 1 > len(bolenler_listesi)):
break
QUESTION
In an application that ships with a read-only SQLite database, I've found that opening the database as immutable radically improves query performance. However the SQLite documentation says this (emphasis mine):
The immutable parameter is a boolean query parameter that indicates that the database file is stored on read-only media. When immutable is set, SQLite assumes that the database file cannot be changed, even by a process with higher privilege, and so the database is opened read-only and all locking and change detection is disabled.
This is tripping me up a bit because the media (Windows Program Files) is not read-only and it can be changed, but the expectation is that it won't change. The application itself does not alter the database. A user could alter the databases using external tools (or just open it in Notepad and corrupt it) but we would call that user error and tell them not to do that.
My concern is that this part of the documentation might be hinting at some other process I'm not aware of (like maybe Windows periodically doing something that might result in the database file changing in some way).
If the application itself does not alter the database, and the user doesn't either, and there isn't some other malicious or poorly-coded program on the computer that might be touching files that don't belong to it, is it reasonably safe to open a SQLite database as immutable?
...ANSWER
Answered 2021-May-01 at 00:30Experimentally, the answer appears to be yes, it is safe. I made this change and have not observed any problems with it.
QUESTION
After successfully installing the dvips package, it shows up:
...ANSWER
Answered 2021-Apr-10 at 07:56I would do:
QUESTION
The image of the product in the product component is not rendering the styles given to it in the Product.css
file.
Header and Home component styling are working fine but not the Product styling.
I checked everything, seems like everything is fine but still scratching my head to find the blind spot.
OUTPUT
...ANSWER
Answered 2021-Mar-22 at 05:08The classname
prop should be className
(camelCase
).
From the docs,
To specify a CSS class, use the
,className
attribute. This applies to all regular DOM and SVG elements like, and others.
Community Discussions, Code Snippets contain sources that include Stack Exchange Network
Vulnerabilities
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Install radical
Clone this repository.
Configure the project. By default, both runtime library and calibration apps will be built. If only the runtime library is needed, then configure as follows: cmake .. -DBUILD_APPS=OFF Note that if you want to enable support for Debevec camera response function calibration and fitting of polynomial vignetting model in the calibration app, you need to tell CMake where Ceres is installed: cmake .. -DCeres_DIR=<CERES_INSTALL_PATH>/share/Ceres
Install the project with make install.
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