Questions tagged [geometry]
The geometry tag has no usage guidance.
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Understanding and Resolving Singularities in Stereo Rectification using Multiple View Geometry
I am currently working on implementing a stereo rectification algorithm based on the method described in the book "Multiple View Geometry in Computer Vision (MVG)," specifically in Section ...
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Understanding difference in rotation and translation
Hi I am a newbie to the field so please don't mind a rookie question. I have read multiple articles and want to ensure my understanding is correct.
I have following two images. In the second image, ...
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How to implement interpolation by convolution for rotation of an image by an angle which is not a multiple of 90 degrees?
I know that the usual way to perform rotation of an image is to compute the new pixel coordinates by multiplying with a rotation matrix $ \begin{pmatrix}x_{rot} \\ y_{rot} \end{pmatrix} = \begin{...
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Geometric Transformation of Distorted Grid Lines Using Image Processing
If the grid-lines in the image (attached: distort1.jpeg) are distorted and squares in image appears distorted a bit. What would be the best and easy approach to convert them to perfect squares (as ...
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Equation of line in the Homogeneous coordinate system
Given two points P and Q we can convert them to the homogeneous coordinate system, compute their cross product and thus get the ...
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Detecting Intersections of a Ray with a Polygon
As a part of a math essay, I am writing a program that detects intersections of a line that is drawn with a shape that is inputted.
For example, in the shape below, The polygon is the input image of ...
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Finding point height on a cup using OpenCV
Suppose that I want to find the 3D position of a cup with its rotation, with image input like this (this cup can be rotated to point in any direction):
Given that I have a bunch of 2D points ...
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The rank of Fundamental Matrix
This question is regarding two view geometry where a point lying in the image plane of the first frame/ position of the camera is mapped onto the image plane of the second frame/ position of the ...
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How to get the orientation value of a rotated square?
Suppose we have a square shape rotated by $d$ degrees counterclockwise (or $-d$ degrees clockwise) in a binary image as the following:
I'm trying to rotate it by 'Orientation' value of regionprops ...
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Computer Vision - Does implementation of Hough Transform for lines require a loop for angle parameter?
I am trying to understand how Hough Transform is implemented in real world applications. Consider a line with equation:
$y = mx + b$
In parametric form, this line can be represented using (d, $\...
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Can an untilted perspective of an object be obtained from a 2D image of a tilted object using angular transformations?
I'm trying to make a height estimation algorithm that works in tandem with a bounding box object detector. The object detector can recognise the objects in images taken at pitch/yaw angular offsets.
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Derivation of range migration algorithm
Problem:
In Walter G.Carrara's book on synthetic aperture radar, the equation is presented:
$\Phi(K_X, K_R) = -K_XX_t - R_B\sqrt(K_R^2 - K_X^2) +K_RR_S $ (10.30)
And this is said to come from ...
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Are there analogues to orthogonal transformations in non-orientable surfaces?
I am working on extremely large, symmetric matrices of counts, and attempting to identify patterns/shapes within them. Wavelets are a popular tool in image processing, and have some nice statistical ...
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Finding angles from an IMU (Quaternions to Eulers)
Greetings and apologies if this has already been answered, but I haven't been able to get a clear answer from looking on Stack Exchange so-far.
I have Quaternions coming from two different IMU's ...
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Would it be possible to reconstruct 3d trajectory of ball projectile using only monocular video
Assume ball location on the image frame in each timestamp is given.
Would it be possible to reconstruct the ball's 3d trajectory in the camera's coordinate frame?
The ball should be able to ...
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