### Reconstructing 3D buildings from aerial LiDAR with AI: details

Such normalization made the input signal pretty much building-height invariant, although reduced ... Note that the coordinates are in “super-tile” 1024 x 1024 pixel space (see “Super-tile ...

### Units & Coordinates¶

Because of this, time is measured in units of length and frequency is measured in units of inverse length. Due to the scale invariant nature of the linear Maxwell’s equations, there is no intrinsic le...

### What does it mean for a vector to remain invariant under ...

What does it mean for a vector to remain "invariant" under coordinate transformation? I think I already know the answer to this question in a foggy, intuitive way, but I'd like a really clear explanation, if someone has it.

### Invariant (mathematics) - Wikipedia

In mathematics, an invariant is a property, held by a class of mathematical objects, which remains unchanged when transformations of a certain type are applied to the objects. The particular class of objects and type of transformations are usually indicated by the context in which the term is used. For example, the area of a triangle is an invariant with respect to isometries of the Euclidean ...

### Invariant theory - Wikipedia

Invariant theory is a branch of abstract algebra dealing with actions of groups on algebraic varieties, such as vector spaces, from the point of view of their effect on functions.Classically, the theory dealt with the question of explicit description of polynomial functions that do not change, or are invariant, under the transformations from a given linear group.

### VLFeat - Documentation > C API

SIFT descriptors are computed by either calling vl_sift_calc_keypoint_descriptor or vl_sift_calc_raw_descriptor.They accept as input a keypoint frame, which specifies the descriptor center, its size, and its orientation on the image plane.

### Homogeneous Coordinates - Song Ho

In Euclidean space (geometry), two parallel lines on the same plane cannot intersect, or cannot meet each other forever. It is a common sense that everyone is familiar with.

### Spacetime Geometry Inside a Black Hole - Jim Haldenwang

Spacetime Geometry Inside a Black Hole. by Jim Haldenwang written Nov. 12, 2004 revised July 30, 2012. This paper describes the nature of spacetime in and around black holes.

### VLFeat - Tutorials > SIFT detector and descriptor

The Scale-Invariant Feature Transform (SIFT) bundles a feature detector and a feature descriptor. The detector extracts from an image a number of frames (attributed regions) in a way which is consistent with (some) variations of the illumination, viewpoint and other viewing conditions.

### 1.1. Generalized Linear Models — scikit-learn 0.20.0 ...

1.1. Generalized Linear Models¶. The following are a set of methods intended for regression in which the target value is expected to be a linear combination of the input variables.

### Math Dictionary

License. The materials (math glossary) on this web site are legally licensed to all schools and students in the following states only: Hawaii

### C++ Core Guidelines - GitHub Pages

The C++ Core Guidelines are a set of tried-and-true guidelines, rules, and best practices about coding in C++