imageResolution | Simple spatial resolution calculator | Map library
kandi X-RAY | imageResolution Summary
kandi X-RAY | imageResolution Summary
Simple spatial resolution calculator for nadir aerial imagery
Support
Quality
Security
License
Reuse
Top functions reviewed by kandi - BETA
- Calculate pixel resolution .
- Calculate the AGL value for the given pixel values .
- save a csv file to a csv file
- save a csv file to csv
- Check if value is a float
imageResolution Key Features
imageResolution Examples and Code Snippets
Community Discussions
Trending Discussions on imageResolution
QUESTION
I am writing an ARKit app where I need to use camera poses and intrinsics for 3D reconstruction.
The camera Intrinsics matrix returned by ARKit seems to be using a different image resolution than mobile screen resolution. Below is one example of this issue
Intrinsics matrix returned by ARKit is :
[[1569.249512, 0, 931.3638306],[0, 1569.249512, 723.3305664],[0, 0, 1]]
whereas input image resolution is 750 (width) x 1182 (height). In this case, the principal point seems to be out of the image which cannot be possible. It should ideally be close to the image center. So above intrinsic matrix might be using image resolution of 1920 (width) x 1440 (height) returned that is completely different than the original image resolution.
The questions are:
- Whether the returned camera intrinsics belong to 1920x1440 image resolution?
- If yes, how can I get the intrinsics matrix representing original image resolution i.e. 750x1182?
ANSWER
Answered 2021-May-28 at 13:28Intrinsics camera matrix converts between the 2D camera plane and 3D world coordinate space. Here's a decomposition of an intrinsic matrix, where:
fxandfyis a Focal Length in pixelsxOandyOis a Principal Point Offset in pixelssis an Axis Skew
According to Apple Documentation:
The values fx and fy are the pixel focal length, and are identical for square pixels. The values ox and oy are the offsets of the principal point from the top-left corner of the image frame. All values are expressed in pixels.
So you let's examine what your data is:
QUESTION
I'm trying to show particles' effect on my UI. Then I came across this post: Unity Particle Effects On Canvas And I followed every step, but the particles are not shown on the canvas when I click play for some reason.
[My Particle Camera components][1] [My Hierachy][2]
I just followed the steps shown in the post, so my script is basically identical:
...ANSWER
Answered 2021-Feb-05 at 10:22I tried @Iggy method and it seems to work fine. I just had to download a package then I was ready to go. https://github.com/mob-sakai/ParticleEffectForUGUI
I don't know why this post got a dislike, but whoever disliked could at least tell me why, so I can at least improve.
QUESTION
This question is also asked in the Apple Forum but so far, I have not seen any response there.
The question is really, after finding the point of interested from a frame in ARSession. How to convert that into 3D world coordinate.
How did I got a point:
...ANSWER
Answered 2020-Nov-10 at 17:31The issue was the image orientation. In my case, using iPad back camera in Portrait direction, I need to do .downMirrored (instead of .up).
QUESTION
I'm trying out to use the XML - Mind converter https://www.xmlmind.com/foconverter/ to convert some xsl-fo to an rtf and this works well . Just to be clear this is nothing specific to the conveter or its functionality but just a clarification I would like to get which is why I am asking this on stack overflow .
So I have the following code (that was obtained from some documentation)
...ANSWER
Answered 2020-Jul-09 at 14:49Sine you need the output as a string you could try doing something like this
QUESTION
I am doing this Augmented Reality project starting from Xcode's default AR project.
I need to know the focal length of the camera used by ARKit.
This page defines Focal Length well:
Focal length, usually represented in millimeters (mm), is the basic description of a photographic lens. It is not a measurement of the actual length of a lens, but a calculation of an optical distance from the point where light rays converge to form a sharp image of an object to the digital sensor or 35mm film at the focal plane in the camera. The focal length of a lens is determined when the lens is focused at infinity.
Said that, Apple offers this camera matrix called intrinsics, defined as
According to Apple,
The values fx and fy are the pixel focal length, and are identical for square pixels. The values ox and oy are the offsets of the principal point from the top-left corner of the image frame. All values are expressed in pixels.
I am getting the same number for fx and fy, that is 1515.481.
To obtain the real focal length in millimeters,
- This page says I need to use this formula:
F(mm) = F(pixels) * SensorWidth(mm) / ImageWidth (pixel)but I don't have the sensor dimensions. - this other page says
FC = fx/sx = fy/sy, wheresxandsyare the image dimensions width and height, what I suppose will give me two numbers, becausefx=fy... and this is back to square zero.
On iPhone 11, ARCamera captures a frame with the following dimensions: 1920x1440, at least this number is reported by the property camera.imageResolution.
In the name of mental sanity, is there a way to get the focal length of ARCamera used by RealityKit?
ANSWER
Answered 2020-Jun-30 at 11:37ARKit and RealityKit does definitely have identical values of focal length parameter. That's because these two frameworks are supposed to work together. And although there's no focal length instance property for ARView at the moment, you can easily print in Console a focal length for ARSCNView or SCNView.
QUESTION
The following class creates a form (Jpanel) tasked with acquiring multiples Strings from the user and do something with them. It it functionally working, but it bugs me that the height of the JTextFields (a component that allows for the modification of one line of text) is automatically adjusted and can became extravagantly big.
I have tried the method setBounds(), but:
- I do not want to calculate the position or width of the
JTextField, just its height; and - It does not limit the height of the
JTextField!
Any suggestion, please?
...ANSWER
Answered 2020-May-16 at 12:07This is because BoxLayout uses the whole space of the container. With other words, it stretches all components to take the advantage of the total available space (since you use PAGE_AXIS, it refers to available height).
One of the solutions is to use a BorderLayout as an outside container and add this BoxLayout-ed panel inside at, with BorderLayout.PAGE_START constraints. PAGE_START constraints refers as "Hey you BoxLayout, there is no available space for you". Take a look at this example:
QUESTION
I am trying to change what image is shown in the JLabels of my User Interfaces.
The following class is a very simple test of the concept. The UI takes a folder full of images (the field imageFolderPath) and displays the first image, resized, in the only JLabel; clicking on the image prompts the UI to display the following image in the folder.
At least, it should. In reality, no image is shown. The fault is obviously of the method reloadImage(), either while rescaling the image or while repainting the JLabel, but I have not managed to find or correct the problem. Any idea?
ANSWER
Answered 2020-Apr-16 at 19:04In reality, no image is shown.
QUESTION
Say I have the following interfaces:
...ANSWER
Answered 2019-Sep-16 at 10:43First of all, what do you want to achieve? What should Foo.ReturnAs return? How are you going to use those interfaces?
You can't use ReturnAs in the other interfaces without inheriting from IReturnableAs. Once you inherit from that interface though Foo will have to provide an implementation. When that happens, no matter how you cast Foo you'll always get its own IReturnableAs implementation.
Interfaces aren't abstract classes so there can only be one interface member implementation. You can't access different "default" implementations through different interfaces.
Composite result when accessed through IReturnableAs
If you want to return json or image for the specific interfaces and image;json for Foo overall the best option would be for the interfaces to not inherit from IReturnableAs, and provide their own ReturnAs property :
QUESTION
I'm working with ARKit and trying to get camera position from QR code with known size (0.16m). To detect QR code I'am using Vision framework so i can get each corner point on image.
Data preparation:
...ANSWER
Answered 2019-Aug-09 at 11:15The estimated translation between the camera and the tag is not correct. The tz is negative which is physically not possible. See here for the details about the camera coordinates system.
You have to be sure that each 3D object point matches with the corresponding 2D image point.
If I plot the 2D coordinates, I have the following image:
With RGBM the order of the points.
If you swap the last two image points, you should get:
QUESTION
I have 'ImagePendingDBStore' entity, I have added 4 more columns in this entity (see comment in code below). In this, one column is indexed 'referenceId'
...ANSWER
Answered 2019-Jul-15 at 16:22As the message says index_ImagePendingDBStore_referenceId already exists.
You only need the 4 ALTER statements as the index exists i.e. you have not added it. As it already exists then adding the 4 columns doesn't require the index to be changed.
You could remove the line :-
Community Discussions, Code Snippets contain sources that include Stack Exchange Network
Vulnerabilities
No vulnerabilities reported
Install imageResolution
You can use imageResolution like any standard Python library. You will need to make sure that you have a development environment consisting of a Python distribution including header files, a compiler, pip, and git installed. Make sure that your pip, setuptools, and wheel are up to date. When using pip it is generally recommended to install packages in a virtual environment to avoid changes to the system.
Support
Reuse Trending Solutions
Find, review, and download reusable Libraries, Code Snippets, Cloud APIs from over 650 million Knowledge Items
Find more librariesStay Updated
Subscribe to our newsletter for trending solutions and developer bootcamps
Share this Page
