echostorm / cvcamview

QML plugin that displays a camera capture, it allow us to access every frame as an IplImage

CvCamView

A library to use opencv capture methods in QML applications, it emits a signal every time a new frame is queryed from the camera and it provides the frame as a native IplImage*

Features

You can change camera and resolution at runtime. The widget can be easily resized or expanded independently of the resolution You can access every frame as an IplImage* or as a QImage You can change camera state to one of the following: UnloadedState, LoadedState, ActiveState

UseCase

Here is an example of CvCamView in action (note that consumer is not provided):

import opencv.components 1.0

CvCamView {
    id: camView
    width: 800
    height: 600
    camera: 0
    cameraState: CvCamView.ActiveState //unneeded because this is the default state
    resolution: CvCamResolution {
                    width: 800
                    height: 600
                }
    onNewFrame: {
        console.log("new frame recived");
        consumer.detectSomething(iplWidth, iplHeight, iplData);
    }

the consumer can use the image in this way:

void consumer::detectSomething(int width, int height, QByteArray data){
    IplImage *image = cvCreateImage(cvSize(width, height), IPL_DEPTH_8U, 3);
    cvSetData(image, data.data(), width*3);
    ...
}