Question

我想在将相机保存到隔离存储之前减小相机拍摄的图像尺寸。我已经将它降低到最低分辨率（640x480）我如何将字节数减少到100kb而不是它们几乎以1mb的速度出现。

void cam_CaptureImageAvailable(object sender, Microsoft.Devices.ContentReadyEventArgs e)
    {

        string fileName = folderName+"\\MyImage" + savedCounter + ".jpg";

        try
        {   

            // Set the position of the stream back to start
            e.ImageStream.Seek(0, SeekOrigin.Begin);

            // Save picture as JPEG to isolated storage.
            using (IsolatedStorageFile isStore = IsolatedStorageFile.GetUserStoreForApplication())
            {
                using (IsolatedStorageFileStream targetStream = isStore.OpenFile(fileName, FileMode.Create, FileAccess.Write))
                {

                    // Initialize the buffer for 4KB disk pages.
                    byte[] readBuffer = new byte[4096];
                    int bytesRead = -1;

                    // Copy the image to isolated storage. 
                    while ((bytesRead = e.ImageStream.Read(readBuffer, 0, readBuffer.Length)) > 0)
                    {
                        targetStream.Write(readBuffer, 0, bytesRead);
                    }

                }

            }




        }
        finally
        {
            // Close image stream
            e.ImageStream.Close();
        }

    }

Answer 1

我对Windows Phone一无所知，但也许这个链接可以帮助您： http://msdn.microsoft.com/en-us/library/ff769549(v=vs.92).aspx

1）加载你的jpeg 2）复制到位图 3）保存为具有质量设置的位图 http://msdn.microsoft.com/en-us/library/system.windows.media.imaging.extensions.savejpeg(v=vs.92).aspx

如何减小图像的大小

1 个答案: