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36 lines
884 B
Go
36 lines
884 B
Go
package opencv
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import (
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"image"
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"image/color"
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"github.com/hybridgroup/gocv"
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)
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var classifier *gocv.CascadeClassifier
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// loadHaarClassifierCascade returns open cv HaarCascade loaded
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func loadCascadeClassifier(haar string) *gocv.CascadeClassifier {
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if classifier != nil {
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return classifier
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}
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c := gocv.NewCascadeClassifier()
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c.Load(haar)
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classifier = &c
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return classifier
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}
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// DetectFaces loads Haar cascade to detect face objects in image
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func DetectFaces(haar string, img gocv.Mat) []image.Rectangle {
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return loadCascadeClassifier(haar).DetectMultiScale(img)
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}
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// DrawRectangles uses Rect array values to return image with rectangles drawn.
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func DrawRectangles(img gocv.Mat, rects []image.Rectangle, r int, g int, b int, thickness int) {
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for _, rect := range rects {
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gocv.Rectangle(img, rect, color.RGBA{uint8(r), uint8(g), uint8(b), 0}, thickness)
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}
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return
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}
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