Adjusting the brightness and contrast of an image with opencv4.3.0 Tutorial

Catalog Preface 1. Brightness and Contrast 1. What is brightness and contrast 2. Brightness and Contrast Adjustment Principle 3. Brightness and Contrast Adjustment Code Implementation 4,API-convertScaleAbs 2. Gamma Correction 1. Introduction of Gamma Correction 2. Gamma Correction Principle ...

Posted by master82 on Thu, 11 Jun 2020 02:58:03 +0200

One article lets you read "Seven Principles of Design Mode - Single Responsibility Principle"

Just a week before the end of the last round of overtime work, the leader came to tell me: "Birds, weekends and overtime work are better match!"Poor children have new urgent tasks, and the good overtime life is starting again. NoThis is not the life that newbies want. Newbies want to resist. N ...

Posted by Edward on Wed, 10 Jun 2020 04:10:46 +0200

[design mode] observer mode: can a registration function also use design mode?

Life in the world is like living among thorns, the heart does not move, people do not move, do not hurt, if the heart is moving, people move, hurt their body, hurt their bones, so we can experience all kinds of pain in the world catalog My fighting dream Sad Xiao Ming What is the observer model? Re ...

Posted by mariolopes on Sun, 07 Jun 2020 09:45:53 +0200

How to implement login and mutual kick in spring security oauth2

Background An account can only be logged in at one place. Similar business requirements are very common in existing post management systems. However, in the original spring security oauth2 token method process (so-called login) can not meet similar needs. Let's first look at TokenEndpoint's method flow The client accesses the / oauth/token int ...

Posted by cliffboss on Wed, 27 May 2020 10:37:55 +0200

setInterval and setTimeout of Canvas drawing raindrops (2)

Thank you for your guidance. In view of the bad nature of setInterval, modify it, implement setInterval with setTimeout, and put it in the move attribute of Rain prototype. Operation result: the screen is in disorder and the browser is stuck.. as a result of: setTimeout and setInterval should not be written in the fu ...

Posted by Hepp on Sun, 24 May 2020 17:37:06 +0200

Binder implementation of Camera

api call Get CameraManager object CameraManager mCameraManager = (CameraManager) context.getSystemService(Context.CAMERA_SERVICE); openCamera mCameraManager.openCamera(cameraId, callback, handler); The openCameraDeviceUserAsync method in CameraManager is called private CameraDevice ...

Posted by kkobashi on Sat, 09 May 2020 17:05:58 +0200

Configuration options of radio swiper -- tips on the front end

This paper mainly introduces the swiper configuration options, including unlimited scrolling, lazy loading, monitoring the current position, page up and down, transition animation gradient, delay loading pictures, automatic rotation, etc; Case diagram: Front end code: Tips: because JQ is the rigid demand of the front end, the demons ...

Posted by gilgimech on Fri, 08 May 2020 18:10:59 +0200

Use JQuery to complete the check box selection

Js related technology checked property How to get all check boxes: document.getElementsByName requirement analysis When we deal with forms, in some cases, we need to deal with forms in batches technical analysis First method: selector [property name = 'property value'] $("input[type='checkbox']:gt(0)").prop("checked",this.check ...

Posted by anthonydamasco on Wed, 06 May 2020 18:02:16 +0200

Android Project Actual Series - Based on the Learned Valley Exercise Module

Please be patient to read this module because of its large content and length. Exercise module is divided into two parts [x] Exercise List Interface [x] Exercise details interface 1. Exercise List Interface 1. Exercise Interface (1) Create exercise interface In the res/layout folder, create a new layout file named main_view_exercises. ...

Posted by sheraz on Tue, 05 May 2020 23:18:23 +0200

Wechat applet -- message board

Wechat small program -- Realization of message board Main function points: The border of rich text can automatically match the screen size; Displays the number of words entered in rich text; Get content in rich text and submit message; Pop up window after submitting message; Corresponding. wxml content be careful: Rich text is displaye ...

Posted by bradles on Tue, 05 May 2020 19:37:53 +0200