[Android] Playing Guitar App


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[OpenCV] What is gocv?

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GoCV           The GoCV package provides Go language bindings for the  OpenCV 4  computer vision library. The GoCV package supports the latest releases of Go and OpenCV (v4.0.0) on Linux, macOS, and Windows. We intend to make the Go language a "first-class" client compatible with the latest developments in the OpenCV ecosystem. GoCV also supports  Intel OpenVINO . Check out the  OpenVINO README  for more info on how to use GoCV with the Intel OpenVINO toolkit. How to use Hello, video This example opens a video capture device using device "0", reads frames, and shows the video in a GUI window: package main import ( " gocv.io/x/gocv " ) func main () { webcam , _ := gocv. OpenVideoCapture ( 0 ) window := gocv. NewWindow ( " Hello " ) img := gocv. NewMat () for { webcam. Read (&img) window. IMShow (img) window. WaitKey ( 1 ) } } Face detect This is a more complete example that opens a v...
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[OpenCV] Chapter01-02 Transform image size and flip

Transform image size and flip Source Code package main import ( "image" "log" "gocv.io/x/gocv" ) func main() { imageFilePath := "../../data/Lena.png" mat := gocv.IMRead(imageFilePath, gocv.IMReadAnyColor) if mat.Empty() { log.Panic("Can not read Image file : ", imageFilePath) return } log.Println("original image size:", mat.Size()) width, height := 0.25, 0.5 resizeImage := gocv.NewMat() gocv.Resize(mat, &resizeImage, image.Point{X: 0, Y: 0}, width, height, gocv.InterpolationNearestNeighbor) log.Println("original image size:", resizeImage.Size()) flippedImage := gocv.NewMat() // Flip flips a 2D array around horizontal(0), vertical(1), or both axes(-1) // Reverses with respect to the x axis. gocv.Flip(mat, &flippedImage, 0) // Reverses with respect to the y axis. gocv.Flip(mat, &flippedImage, 1) // Reverses with respect to the both x, y axis. gocv.Flip(mat, &flippedIma...
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[OpenCV] Chapter01-05 Working with UI elements such as scrollbars in OpenCV window

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Working with UI elements such as scrollbars in OpenCV window Source Code package main import ( "log" "gocv.io/x/gocv" ) func main() { windowForTrackbar := gocv.NewWindow("Trackbar Window") defer windowForTrackbar.Close() trackbarR := windowForTrackbar.CreateTrackbar("R", 255) trackbarG := windowForTrackbar.CreateTrackbar("G", 255) trackbarB := windowForTrackbar.CreateTrackbar("B", 255) trackbarA := windowForTrackbar.CreateTrackbar("A", 10) mat := gocv.NewMatWithSize(300, 300, gocv.MatTypeCV8UC3) log.Println("-----------------------") log.Println("Rows:", mat.Rows()) log.Println("Cols:", mat.Cols()) for { // BGR blue := float64(trackbarB.GetPos()) green := float64(trackbarG.GetPos()) red := float64(trackbarR.GetPos()) alpha := float64(trackbarA.GetPos()) / 10 log.Println("-----------------------") log.Println("blue:", blue) log....
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