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
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| // 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
More posts in my blog ElBruno.com.
More info in https://beacons.ai/elbruno
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