// GET: api/Sensors/name
public HttpResponseMessage Get(string sensorName, bool outputJSON)
{
var io = new ImageOperations();
var sensorPath = HttpContext.Current.Server.MapPath($"~/Sensors/{sensorName}");
var sensorFileContent = File.ReadAllText($"{sensorPath}/sensor.json");
var js = new JavaScriptSerializer();
var sensorDto = js.Deserialize <SensorDto>(sensorFileContent);
var parkingSpacesOutputs = new List <ParkingSpaceOutputDto>(sensorDto.ParkingSpaces.Length);
var inputImage = sensorInputs.ContainsKey(sensorName)? sensorInputs[sensorName] : (Bitmap)Bitmap.FromFile($"{sensorPath}/{sensorDto.inputSample}");
var emptyImage = (Bitmap)Bitmap.FromFile($"{sensorPath}/{sensorDto.EmptyImg}");
var outputImage = (Bitmap)inputImage.Clone();
using (Graphics outputGraphics = Graphics.FromImage(outputImage))
{
foreach (var parkingSpaceDto in sensorDto.ParkingSpaces)
{
var inputCrop = (Bitmap)inputImage.Clone();
var emptyCrop = (Bitmap)emptyImage.Clone();
var sensorMask = (Bitmap)Bitmap.FromFile($"{sensorPath}/{parkingSpaceDto.SensorMask}");
var locationMask = (Bitmap)Bitmap.FromFile($"{sensorPath}/{parkingSpaceDto.LocationMask}");
var sensorPixelCount = io.CountNonEmptyPixels(sensorMask);
io.CropImageWithMask(inputCrop, sensorMask);
io.CropImageWithMask(emptyCrop, sensorMask);
io.DiffImage(inputCrop, emptyCrop);
var diffRGBSum = io.SumAllRGB(inputCrop);
bool vacant = (diffRGBSum / sensorPixelCount) < parkingSpaceDto.Threshold;
if (vacant)
{
io.SetMaskColor(locationMask, 0, 255, 0);
}
else
{
io.SetMaskColor(locationMask, 255, 0, 0);
}
outputGraphics.DrawImage(locationMask, 0, 0, outputImage.Width, outputImage.Height);
parkingSpacesOutputs.Add(new ParkingSpaceOutputDto {
Name = parkingSpaceDto.Name, IsAvailable = vacant, ConfidenceLevel = ((float)diffRGBSum / sensorPixelCount / 255)
});
}
}
if (outputJSON)
{
var outputDto = new SensorOutputDto {
ImageUrl = HttpContext.Current.Request.Url.OriginalString.Replace("outputJson=true", "outputJson=false"), ParkingSpaces = parkingSpacesOutputs.ToArray()
};
HttpResponseMessage result = new HttpResponseMessage(HttpStatusCode.OK);
result.Content = new StringContent(js.Serialize(outputDto).Replace(@"\u0026", "&")); // JavaScriptSerializer messes up &
result.Content.Headers.ContentType = new MediaTypeHeaderValue("application/json");
return(result);
}
else
{
using (MemoryStream ms = new MemoryStream())
{
outputImage.Save(ms, ImageFormat.Png);
HttpResponseMessage result = new HttpResponseMessage(HttpStatusCode.OK);
result.Content = new ByteArrayContent(ms.ToArray());
result.Content.Headers.ContentType = new MediaTypeHeaderValue("image/png");
return(result);
}
}
}
