Table of Contents 1. Selection of light strips 1. Rpi-ws2811 light strip LED 2. Rpi-ws2812 matrix LED Second, try to use the Rpi-ws281x library to test the LED (you can ignore it if you try to solve the sudo permission problem) 1. Understand the light strip wires 2. Start the Raspberry Pi and connect to […]
Tag: pixel
ENVI IDL: Point-pixel extraction of MODIS SWATH products (Python code attached)
Table of Contents 01 Description 1.1 Experiment instructions for this section of ENVI IDL 1.2 Python experimental instructions in this section 02 code 2.1 My ENVI IDL code 2.2 Experiment given ENVI IDL code 2.3 My python code 2.4 Experiment given python code 01 Description Experiment instructions Extract the AOD effective results of the pixels […]
[Encode text into image gray level] Encoded in ASCII and mixed with gray level bits to hide the text string into the lowest bits of image pixels, making it inconspicuous Research (Matlab code implementation)
Welcome to this blog Advantages of bloggers:Blog content should be as thoughtful and logical as possible for the convenience of readers. Motto:He who travels a hundred miles is half as good as ninety. The directory of this article is as follows: Table of Contents 1 Overview 2 Operation results 3 References 4 Matlab code implementation […]
About generating Sentinel-2 L1C pixel-by-pixel solar zenith angle, solar azimuth angle, sensor zenith angle, sensor azimuth angle tif
The sun angle of Sentinel-2 L1C is given in an XML file, in I:\S2B_MSIL1C_20201106T134209_N0500_R124_T22KCA_20230410T094912\S2B_MSIL1C_20201106T134209_N0500_R124_T22 KCA_20230410T094912.SAFE\GRANULE\L1C_T22KCA_A019169_20201106T134212\MTD_TL.xml is under this path, but an angle value of 5km is given, but Actual projects require pixel-by-pixel angle files, so this needs to be processed Mainly use python to parse xml and arcpy for interpolation calculations import xml.etree.ElementTree as ET […]
opencv image pixel type conversion and normalization
Article directory opencv image pixel type conversion and normalization 1. Why convert and normalize image pixel types? 2. In OpenCV, `convertTo()` and `normalize()` are two commonly used image processing functions, used for image pixel type conversion and normalization; (1) The `convertTo()` function is used to convert the pixel type of a `cv::Mat` object to another […]
Pixels, viewports, web page measurement units and mobile terminal adaptation solutions
The concept of pixels Device pixels (physical pixels) Refers to the smallest physical unit that the device can control for display, like small dots. Each small pixel is composed of the three primary colors RGB. Physical pixels are only used to describe the physical resolution, which is fixed when the screen leaves the factory. The […]
openlayers wms/wmts raster layer click point pixel value query
Table of Contents 1. WMS raster layer pixel value query 2. Wmts raster layer pixel value query 3. Browser knowledge supplement Note: For wms raster layer pixel value query, the corresponding url address can be obtained with getGetFeatureInfoUrl, but wmts does not have a built-in getFeatureInfoUrl 1. wms raster layer pixel value query The getGetFeatureInfoUrl […]
ROS map/pixel coordinate tracing point debugging [Python source code implementation]
Article directory ROS python map point debugging tool 1. Rviz tracing points 1.1 Requirement description 1.2 visualization markers 1.3 Engineering Practice 2. Draw points on static map images 2.1 Requirement description 2.2 Engineering practice ROS python map point debugging tool 1. Rviz drawing points 1.1 Requirements Description In ROS development, sometimes image files are loaded […]
Resolution, refresh rate, pixel clock rate, channel rate (dsi)
Refresh rate: It is divided into vertical refresh rate and horizontal refresh rate. The generally mentioned refresh rate usually refers to the vertical refresh rate. The vertical refresh rate indicates how many times the screen image is redrawn per second, that is, the number of screen refreshes per second, in Hz (Hertz). The higher the […]
Meta launches pixel-level motion tracking model, simple version can be played online | GitHub 1.4K stars
Cresi from Ao Fei TempleQubits | Public account QbitAI Video motion tracking is accurate to every pixel! Meta’s latest video tracking tool, CoTracker, gained 1.4k stars on GitHub not long after its release. Judging from several officially released DEMOs, the effect is still shocking. In an equestrian competition, the horse gracefully crosses obstacles under the […]