Hi !
NET is in anniversary mode, and in Dev.to blog, someone asked about these samples in F#. It’s been a while since I wrote some F# code, and this is the perfect excuse to start.
Today Post: Access a local camera and show the camera frames in an OpenCV window. In following posts we will have a face detection demo in F#, like this one:
Easy to implement, and also easy to read:
Code Sample
// Copyright (c) 2022 | |
// Author : Bruno Capuano | |
// Create Time : 2022 Feb | |
// Change Log : | |
// - Open a camera feed from a local USB webcam | |
// - Press [Q] to quit the app | |
// | |
// The MIT License (MIT) | |
// | |
// Permission is hereby granted, free of charge, to any person obtaining a copy | |
// of this software and associated documentation files (the "Software"), to deal | |
// in the Software without restriction, including without limitation the rights | |
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell | |
// copies of the Software, and to permit persons to whom the Software is | |
// furnished to do so, subject to the following conditions: | |
// | |
// The above copyright notice and this permission notice shall be included in | |
// all copies or substantial portions of the Software. | |
// | |
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE | |
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | |
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | |
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN | |
// THE SOFTWARE. | |
open OpenCvSharp | |
let capture = new VideoCapture(0) | |
let window = new Window("El Bruno - F# Camera demo") | |
let image = new Mat() | |
let mutable run = true; | |
while (run = true) do | |
capture.Read(image) | |
if (image.Empty()) then | |
run <- false | |
window.ShowImage(image); | |
if (Cv2.WaitKey(1) = 113) then // Q | |
run <- false |
Happy coding!
Greetings
El Bruno
Top comments (2)
Never seen F# code. The syntax looks nice! Thanks for sharing.
Pretty cool, thanks for the post.