如何在 Win8 Metro 应用程序 VS2012 中提高相机拍摄质量

Question

我正在为 Windows 8 开发一个从 webCamera 拍摄照片的应用程序，当前质量（.jpg 或 .png）是

• 高宽：640X480
• 分辨率：96ppp
• 位深：24Bits

---

function takePhoto() {
    //if a file with the same name exist, creates another with a number at the end
    pics.createFileAsync("photo.jpg", Storage.CreationCollisionOption.generateUniqueName)
      .then(function (file) {   
          var photoProperties = Windows.Media.MediaProperties.ImageEncodingProperties.createJpeg();
          var photoProperties = Windows.Media.MediaProperties.ImageEncodingProperties.createPng();

          mediaCapture.capturePhotoToStorageFileAsync(photoProperties, file).then(function () {
              console.log("Image saved on disk. ");

              var thumbnailUrl = URL.createObjectURL(file, { oneTimeOnly: true });

              previewSlide(thumbnailUrl);
          });
      });
}

如果我将当前的截图与原生相机的截图进行比较，原生相机的应用程序的质量是优越的，我想得到与原生相机相同的结果，或者如果不可能，我想提高图片质量，如何实现？

提前致谢

---

编辑：图片试图解析MediaStreamType

---

相机初始化函数：

function startCamera() {
        mediaCapture = new Capture.MediaCapture();

        mediaCapture.initializeAsync().then(function () {

            var iVectorView = mediaCapture.videoDeviceController.getAvailableMediaStreamProperties(Windows.Media.Capture.MediaStreamType.photo);

            for (var i = 0; i < iVectorView.length; i++) {
                console.log("elemento " + i + ":" + iVectorView[i]);
            }



            mediaCapture.VideoDeviceController.SetMediaStreamPropertiesAsync(iVectorView[], properties);
            mediaCapture.videoDeviceController.setm


            livePreview.src = URL.createObjectURL(mediaCapture);
            livePreview.play();
        });

        livePreview.addEventListener("pause", handlePause);
    }

Answer 1

这就是我在定格动画应用程序中的做法，Zoetrope：

1. 致电mediaCapture.VideoDeviceController.GetAvailableMediaStreamProperties(Windows.Media.Capture.MediaStreamType.Photo) 以获取所有可用的照片配置文件并将结果投射到VideoEncodingProperties
2. 返回的每个流属性都将具有宽度、高度和颜色深度等属性 - 选择适合您的用例的属性。
3. 致电mediaCapture.VideoDeviceController.SetMediaStreamPropertiesAsync(MediaStreamType.Photo, properties) with the VideoEncodingProperties that you want to use.