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numpy - how to counting white pixels in every rectangle in over image?

I have thousands of images 1000X2000 px and I want count only white pixels in each small windows of image 100X200 and write ... how can I do that by python openCV? Sample Image:...

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

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641 views

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求问这个网页中视频的链接如何获取到

想要抓取这个网站中的视频 https://tv.cctv.com/2020/10/2... 但是在网站中的视频链接处找不到原视频地址...

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

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请问这个网站是用什么程序做的？

请问这个网站是用什么程序做的：www.qqhuodong.com，有什么方法查看吗？求告知。...

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

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651 views

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vue3.0如何动态的改变子组件的属性

最近在写vue3.0，试试组件库，但是发现现在没有this.$children了，依赖注入也只能在setup里面进行...我想问问3.0的话，像这种代码怎么实现呢 methods: { updateChildren () { this.$children.forEach ... 始化的时候依赖注入是可以的，但是当我点按钮改子组件属性的时候，应该怎么动态改呢？...

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

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Laravel npm run dev not running the command

I installed the jetstream package at my Laravel project. I then ran the npm install & & npm run dev commands, but the npm ... in the image. What should I do? Thank you for help....

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

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How to implement regressors in a Hierarchical Series in R, with the Fable package?

I am new to exploring the fable package, and I was wanting to implement Regressors in a Hierarchical Time Series model. How ... , in an ARIMA model. Thank you very much in advance....

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

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在组件没有插槽的情况下怎么达到插槽的效果

之前遇到的一个面试题，比如一个日历组件，我想自定义日子的展示效果，但是日历组件没提供插槽的情况，应该怎么处理...

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

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js怎么判断字符串里是否有某个数字。

比如一个字符串是var a = "2，3，4，5，6，7，11，22，33，44"; 我想用 v-if 判断a里是否有2。有就返回true；判断有没有1，11不能算进来。...

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

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flutter - How to fix "NoSuchMethodError: The getter 'path' was called on null" on ImagePicker Cancel Button?

Guys I am using ImagePicker plugin to access the images in my app, but if I decide to cancel it I get this error ... editImage(file.path); }, child: Text('Camera'), ),...

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

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710 views

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r - ggplot kernal density plot lines overlapping improperly

The colors in my density plot are wrong! I can't figure out why. Here is my data: https://pastebin.com/0jqHgvxx data %>% ... )) max(a$y) max(a$x) [1] 0.0002832889 [1] 162414.6...

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

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r - Looping over a list and get new variables

I am total newby to R and want to apply a specific function to a list of data.frames. The dataframes contain rows completely ... == 0) You would help me a lot :) Best, Kathrin...

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - Clicking on a drawn object

I've got a class called Shape which inherits from JPanel. A number of sub-classes in turn extend the Shape classes, ... when I have clearly clicked inside the shape. Any ideas?...

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

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为何finalize不一定会被调用？

书上有句话:"你不知道finalize()会不会被调用（即使能确定他调用，也不知道在什么时候调用）"，这里的“你不知道finalize()会不会被调用”该怎么理解，不是说对象被回收前一定会调用这个方法吗?...

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

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请问有没有那种带动效的类似gif的那种图标库啊？

请问有没有那种带动效的类似gif的那种图标库啊？...

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1.7k views

1 answer

spring cloud集成kafka

我现在spring cloud单独抽出一个程序做kafka 其他程序能不自己配置kafka，就用这一个kafka程序来消费或者生产消息吗...

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

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2.1k views

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vue预渲染prerender-spa-plugin+vue-meta 首页登录页无法获得css,js,图片等静态资源

prerender-spa-plugin+vue-meta 配置了一个项目想对首页登录页进行预加载但是打包之后访问不到任何的js css 图片资源 vue.config.js configureWebpack: config => { if ( ... -event')) } }).$mount('#app'); 请教一下该如何修改才能获取到静态资源...

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

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2.0k views

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怎么用行内样式实现内容根据屏幕宽度自适应？？

不用js，只用行内样式怎么做移动端的响应式啊？？？...

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

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2.1k views

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前端加载缓存中的网络图片

有这样一个场景，页面1从网络获取一张图片a，点击后跳转到明细页面，这时候明细页面也会展示图片a（同样的网络地址），此时是不是就要重复下载图片a？有什么方法可以从本地加载这张图片，而不需要重新下载呢？...

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

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2.3k views

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chrome的FPS meter 要怎么看，为什么我显示出来的不是直接的帧数

看不太懂，没有直接显示fps，是要计算吗...

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

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Google Workspace addon with BigQuery for usage recording

I'm developing an addon of Google Workspace (Google Slides) and having an issue of BigQuery API calling by any of ... service account etc? Thank you for your help in advance!...

asked Jan 27, 2021 in Technique[技术] by 深蓝 (71.8m points)

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2.6k views

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c++ - Write an algorithm that compute the Euler's number until

My professor from Algorithms course gave me the following homework: Write a C/C++ program that calculates the value of the ... epsilon);) The output is 2.5 instead of 2.71828...

asked Jan 25, 2021 in Technique[技术] by 深蓝 (71.8m points)

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2.8k views

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reactjs - useEffect to fetch Blizzard API

I am Attempting just to do a fetch on the Blizzard API using useEffect as my hook. The call goes thru ... of information I am attempting to access Any help is appreciated!...

asked Jan 25, 2021 in Technique[技术] by 深蓝 (71.8m points)

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2.6k views

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tomcat - Removing specific algorithms from Java security providers

I have a tomcat 7.x servlet container which deploys multiple war files from its webapps directory. I would like to ... since I removed MessageDigest.MD5. What could be the reason?...

asked Jan 25, 2021 in Technique[技术] by 深蓝 (71.8m points)

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2.9k views

1 answer

PostgreSQL use wrong delimiter

I'm trying to add data from a .txt file to an empty table in postgreSQL database with pgAdmin. The .txt file uses '| ... 321|"hello" SQL state: 22P04 How to fix this error ? thanks...

asked Jan 25, 2021 in Technique[技术] by 深蓝 (71.8m points)

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2.9k views

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el-table-column超出显示省略号，在mac和windows显示结果不一致

在windows显示结果：在mac显示结果： windows并没有超出省略号显示，mac却有省略号是什么原因导致的呢？（两个页面比例都是100%，控制台查看宽度都是139px）...

asked Jan 25, 2021 in Technique[技术] by 深蓝 (71.8m points)

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2.8k views

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Angular ng-zorro-antd 升级10后样式有问题

今天将 Angular8 的项目升级到 10了，ng serve --o 后没有任何报错（当然是踩过无数坑后）运行起来，但是之前的页面样式不对了在解决报错的过程中有个报错如下 `ERROR in multi ./node_modules ... 仅仅将 nova-lightheme.css拷贝来之后就没有任何报错了，是不是这里仍然有问题导致页面的样式不对？...

asked Jan 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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2.7k views

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vue怎么写put请求

我是这样写的报错如图求助...

asked Jan 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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machine learning - How to save large sklearn RandomForestRegressor model for inference

I trained a Sklearn RandomForestRegressor model on 19GB of training data. I would like to save it to disk in order to ... model in JSON, XML, maybe HDFS, or maybe other formats?...

asked Jan 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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