/
highgui.go
75 lines (60 loc) · 1.53 KB
/
highgui.go
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package cv
/*
#cgo pkg-config: opencv
#include <opencv/cv.h>
#include <opencv/highgui.h>
*/
import "C"
import (
"errors"
"unsafe"
)
func LoadImage(filename string, loadColor bool) (*Image, error) {
cname := C.CString(filename)
defer C.free(unsafe.Pointer(cname))
if !loadColor {
iplgray := C.cvLoadImage(cname, C.int(0))
if iplgray == nil {
return nil, errors.New("Could not open file: " + filename)
}
return imageFromIplImage(iplgray)
}
iplbgr := C.cvLoadImage(cname, C.int(1))
if iplbgr == nil {
return nil, errors.New("Could not open file: " + filename)
}
bgr, _ := imageFromIplImage(iplbgr)
defer bgr.Release()
rgb := new(Image).InitializeAs(bgr)
C.cvCvtColor(bgr.ptr, rgb.ptr, C.CV_BGR2RGB)
return rgb, nil
}
func Show(image *Image, windowName string) {
cname := C.CString(windowName)
defer C.free(unsafe.Pointer(cname))
C.cvShowImage(cname, image.ptr)
}
func WaitKey(miliseconds int) rune {
key := C.cvWaitKey(C.int(miliseconds))
return rune(key)
}
/**************************************************
* Video capture
**************************************************/
type Capture struct {
handler *C.CvCapture
}
func CaptureFromCam(device int) (cap Capture, err error) {
cap.handler = C.cvCaptureFromCAM(C.int(device))
if cap.handler == nil {
err = errors.New("Could not open capture device")
}
return
}
func (cap *Capture) QueryFrame() (*Image, error) {
iplImage := C.cvQueryFrame(cap.handler)
return imageFromIplImage(iplImage)
}
func (cap *Capture) Close() {
C.cvReleaseCapture(&cap.handler)
}