Table of Contents renderings Find similar pictures on echarts official website Introduce histogram into html page Custom histogram Delete unnecessary attributes ?edit Modify graphic size grid Don’t show x-axis ?edit Do not display y-axis and related scales ?edit Set the color of the y-axis text to the color you want Modify the related styles of […]
Tag: histogram
Image processing: Histogram – Backprojection OpenCV v4.8.0
Previous tutorial: Histogram comparison Next tutorial: Template matching Original author Ana Huamán Compatibility OpenCV >= 3.0 Goals In this tutorial you will learn What is backprojection and its uses How to calculate backprojection using OpenCV function cv::calcBackProject How to mix different channels of an image using the OpenCV function cv::mixChannels Theory What is backprojection? Backprojection […]
Front-end vue implements regional map-and marks histogram on the map
Rendering of Tibet’s regional planning and column chart 1. Download the js file of the regional map The regional map can be downloaded from China’s regional map here 2. Implementation code An ordinary html can be used as a reference Implement the regional map of Guangdong Province and label the histogram 3. Specific implementation code […]
Vue3+ts implements 3D histogram using echarts
Finally it happened!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! As a novice, I was a little confused when I received this request. I went crazy and searched online. I searched for many methods and modified them, but it couldn’t come out. Finally! It came out. My complete record of this great moment is as follows: Step one: There needs to be […]
echarts3D histogram
Since the echarts official website does not have a 3D histogram case, I wrote one myself and used it in the project Content Since the echarts official website does not have a 3D histogram case, I wrote one myself and used it in the project. renderings html code js code Renderings Color content, etc. can […]
Image processing: Histogram – Histogram equalization OpenCV v4.8.0
Previous tutorial: Affine transformation Next tutorial: Histogram calculation Original author Ana Huamán Compatibility OpenCV >= 3.0 Goals In this tutorial you will learn What is an image histogram and what is it used for? Equalize image histogram using OpenCV function cv::equalizeHist Theory What is an image histogram? It is a graphical representation of the intensity […]
Image processing: Histogram – Histogram calculation OpenCV v4.8.0
Previous tutorial: Histogram equalization Next tutorial: Histogram comparison Original author Ana Huamán Compatibility OpenCV >= 3.0 Goals In this tutorial you will learn how to Use the OpenCV function cv::split to split the image into corresponding planes. Calculate the histogram of an image array using the OpenCV function cv::calcHist Use the function cv::normalize to normalize […]
c++ visual processing—-drawing histogram, H-S histogram, two-dimensional H-S histogram, RGB three-color histogram
Histogram: cv::calcHist() cv::calcHist() is a function in OpenCV used to calculate histograms. A histogram is a tool used to visualize the distribution of brightness or color in an image. This function is typically applied to individual channels of grayscale or color images. The following is the basic syntax and parameters of the cv::calcHist() function: void […]
vue2+echarts implements 3D histogram
There is no spacing due to too much data, and other needs can be adjusted by yourself. <style lang=”scss” scoped=””> @import “style.scss”; </style> <template> <div class=”first-bar”> <div class=”index-title”><img :src=”require(‘@/assets/images/distribution-circle.png’)” class=”distribution-circle”>Plan Completion rate</div> <div class=”echarts-content”> <div id=”first-main” class=”echarts”></div> </div> </div> </template> <script> import * as echarts from ‘echarts/core’ import {<!– –> ToolboxComponent, TooltipComponent, GridComponent, LegendComponent, TitleComponent […]
OpenCV4 (C++) – Histogram
Article directory Preface 1. Calculate the histogram 2. Normalization 3. Histogram equalization 4. Histogram matching Foreword Histogram was first proposed in statistics. It represents the distribution of data by a series of vertical stripes or line segments with varying heights. Generally, the horizontal axis represents the data type, and the vertical axis represents the distribution. […]