Counting objects on a picture
One common task is to calculate the number of objects on the picture. For example, there may be a need to count people that participate in an event or calculate the number of cars on the parking lot to take certain security measures. For example, a developer could implement an application that regularly takes pictures via a web camera and makes requests to Aspose Object Detection API to calculate the number of people on it. A developer could request for a JSON response to further analyze and filter the result or request a resulting image to append it to a paper report, for instance. You can read more about the resulting JSON in our blog.
Additionally, a developer could use Aspose.Imaging library to crop the detected object from the input image.
| /// <summary> | |
| /// Detect object on an image that is passed in a request stream. | |
| /// </summary> | |
| public void CountObjectOnPicture() | |
| { | |
| using (FileStream inputImageStream = File.OpenRead(Path.Combine(ExampleImagesFolder, SampleImageFileName))) | |
| { | |
| //detect objects on an image | |
| string method = "ssd"; | |
| int threshold = 50; | |
| bool includeLabel = true; | |
| bool includeScore = true; | |
| string outPath = null; | |
| string storage = null; | |
| var objectDetectionRequest = new CreateObjectBoundsRequest(inputImageStream, method, threshold, includeLabel, includeScore, outPath, storage); | |
| DetectedObjectList detectedObjectList = this.ImagingApi.CreateObjectBounds(objectDetectionRequest); | |
| var format = "jpg"; | |
| foreach(var obj in detectedObjectList.DetectedObjects) | |
| { | |
| //create crop request | |
| var cropRequest = | |
| new CreateCroppedImageRequest( | |
| inputImageStream, | |
| (int)obj.Bounds.X, | |
| (int)obj.Bounds.Y, | |
| (int)obj.Bounds.Width, | |
| (int)obj.Bounds.Height, | |
| format, | |
| outPath, | |
| storage); | |
| using (var updatedImage = ImagingApi.CreateCroppedImage(cropRequest)) | |
| { | |
| //...do something with a cropped image | |
| } | |
| } | |
| } | |
| } |