First, let’s briefly go over the coordinate transformation in the camera model. World coordinate system => Image pixel coordinate system A little concept: External parameters: Coordinate transformation between coordinate systems at different locations in physical space, involving translational alignment of the origin and rotational alignment of the coordinate axis The derivation process: Rotation matrix derivation […]
Tag: coordinate
VTK OrientationMarker direction three-dimensional coordinate system camera coordinate axis custom coordinate axis
This article is developed in Python language When we develop 3D software, we often use the camera coordinate axis to indicate the current spatial position; Coordinate axis effect: Camera direction coordinate axis Cube coordinate axis Custom axis: Code: Axes def main(): colors = vtkNamedColors() # create a Sphere sphereSource = vtkSphereSource() sphereSource.SetCenter(0.0, 0.0, 0.0) sphereSource.SetRadius(0.5) […]
echart enables the cross coordinates of the fund trend chart to be displayed as the finger slides
1. Currently, many of the fund and stock malls of major securities companies are implemented using H5. When talking about funds, the trend chart of fund stocks is inseparable. So the first thing that comes to mind is to use echarts to implement it. The trend chart content is displayed using The line chart of […]
GDI Fancy Exploration Based on C# Four: Image Zoom and Coordinate Transformation
1. Two lengthy sentences When playing with GDI, you cannot avoid images after all. Maybe at the beginning, I could try to assign the bitmap directly to the Image of the pictureBox to load the image, but it is a dead thing after all. Often when loading images, they basically have the function of zooming […]
ArcGIS API for Javascript calculates length, area, distance and buffer in different coordinate systems
ArcGIS API for Javascript has a variety of methods for calculating length, area, etc., which we often get confused. Today we will briefly review the applicable scenarios of each method. 1. Calculate the length import * as geometryEngine from ‘@arcgis/core/geometry/geometryEngine’ import * as geodesicUtils from ‘@arcgis/core/geometry/support/geodesicUtils’ /** Calculate length * @param {Geometry} geometry geometry * […]
Calculate the intersection of two straight lines given four point coordinates
Article directory 1 chatgpt4 2. A word of Wen Xin 3. Spark 4. Bard Summarize I used Chatgpt4, Wen Xinyiyan, iFlytek Spark, and Google Bard to search for this question and gave the answers respectively. Let me talk about the conclusion first. Chatgpt4 and Wen Xinyiyan gave the correct answer, and the other two parts […]
Java implements longitude and latitude coordinate conversion (GPS-Amap)
1. Introduction to coordinate systems A coordinate system is a reference system that describes the spatial location (coordinates) of material existence, and is implemented by defining specific datums and their parameter forms. Coordinates are a set of numerical values that describe a location. According to the dimensions of the coordinates, they are generally divided into […]
A brief discussion on the coordinate transformation between vins, mavros and px4
1. Foreword In the autonomous drone system, the reference coordinate systems among VINS-Fusion, Mavros, and PX4 are different, and the relationship between these coordinate systems can easily cause confusion. This article aims to clarify the differences between different modules. The coordinate transformation relationship is beneficial to the conversion of data between different modules. Finally, some […]
One article explains the space-time coordinate system in autonomous driving
Click “Xiaobai Xue Vision” above and choose to add “Star” or “Pin“ Heavy stuff, delivered as soon as possible Source | The forefront of smart driving Whether it is an advanced assisted driving ADAS system or an autonomous driving system, an indispensable and important task is to calculate one’s own position, as well as the […]
Transformation matrix of points in 2D coordinate system (translation, scaling, rotation, miscut)
This article reprints the article of the same name written by Zhuo Bufan on Zhizhihu. I have run the code described in it and added some comments to make it easier to understand. 1. Translation In 2D space, we often need to translate a point to another position. Assume a point P in space, expressed […]