private async Task <BoxExtractionResult> ExtractBoxAsync(
Image image,
BoxExtractionInput input,
ThumbnailSizeName thumbnailSize,
CancellationToken cancellationToken)
{
var face = new BoxExtractionResult();
int width = input.Box.Right - input.Box.Left;
int height = input.Box.Bottom - input.Box.Top;
double multi = 1.95;
var widthAdd = (int)((width * multi - width) / 2);
//Make height and width same
var heighAdd = Math.Abs(widthAdd + width - height);
var faceBox = new ImageBox();
faceBox.Left = input.Box.Left - widthAdd;
if (faceBox.Left < 0)
{
faceBox.Left = 0;
}
faceBox.Right = input.Box.Right + widthAdd;
if (faceBox.Right > image.Width)
{
faceBox.Right = image.Width;
}
faceBox.Top = input.Box.Top - heighAdd;
if (faceBox.Top < 0)
{
faceBox.Top = 0;
}
faceBox.Bottom = input.Box.Bottom + heighAdd;
if (faceBox.Bottom > image.Height)
{
faceBox.Bottom = image.Height;
}
var rect = new Rectangle(
faceBox.Left,
faceBox.Top,
faceBox.Right - faceBox.Left,
faceBox.Bottom - faceBox.Top);
Image croped = image.Clone(x => x.Crop(rect));
ThumbnailResult faceThumb = await _thumbnailService.GenerateThumbnailAsync(
croped,
thumbnailSize,
cancellationToken);
return(new BoxExtractionResult
{
Id = input.Id,
Thumbnail = faceThumb
});
}
public async Task <IEnumerable <BoxExtractionResult> > ExtractBoxesAsync(
Image image,
IEnumerable <BoxExtractionInput> inputs,
ThumbnailSizeName thumbnailSize,
CancellationToken cancellationToken)
{
var faces = new List <BoxExtractionResult>();
foreach (BoxExtractionInput input in inputs)
{
try
{
BoxExtractionResult face = await ExtractBoxAsync(
image,
input,
thumbnailSize,
cancellationToken);
faces.Add(face);
}
catch (Exception ex)
{
}
}
return(faces);
}
