Get image width and height with Uploader 8

How do you get the uploaded image width and height using Uploader 8? For example in Image Uploader 6 I could use the Request.Form.

Here is what I used with Image Uploader 6:

HttpPostedFile imgFull = Request.Files["Thumbnail1_" + i];

// Request.Form["Thumbnail1FileSize_" + i].ToString();

// Request.Form["Thumbnail1Width_" + i].ToString();

// Request.Form["Thumbnail1Height_" + i].ToString();

HttpPostedFile imgFull = Request.Files["Thumbnail2_" + i];

// Request.Form["Thumbnail2FileSize_" + i].ToString();

// Request.Form["Thumbnail2Width_" + i].ToString();

// Request.Form["Thumbnail2Height_" + i].ToString();

Also, how do you upload multiple sizes for a single image. In Image Uploader 6 I used the following:

iu.addParam("UploadThumbnail1FitMode", "Fit");

iu.addParam("UploadThumbnail1Width", "700");

iu.addParam("UploadThumbnail1Height", "525");

iu.addParam("UploadThumbnail1JpegQuality", "72");

iu.addParam("UploadThumbnail1ResizeQuality", "High");

iu.addParam("UploadThumbnail2FitMode", "Fit");

iu.addParam("UploadThumbnail2Width", "400");

iu.addParam("UploadThumbnail2Height", "300");

iu.addParam("UploadThumbnail2JpegQuality", "72");

Is the below code the correct way for doing multiple sizes per image upload with Uploader 8?:

converters: [

{ mode: '*.*=Thumbnail1', thumbnailWidth: 800, thumbnailHeight: 600,

thumbnailJpegQuality: 72, thumbnailFitMode: 'Fit'},

{ mode: '*.*=Thumbnail2', thumbnailWidth: 400, thumbnailHeight: 300,

thumbnailJpegQuality: 72, thumbnailFitMode: 'Fit'},

{ mode: '*.*=Thumbnail3', thumbnailWidth: 100, thumbnailHeight: 75,

thumbnailJpegQuality: 72, thumbnailFitMode: 'Fit'

}],