How to use MS Custom VisionAI to train a model for objects in images

I used Microsoft Cognitive Services to detect objects in images through Microsoft Azure Custom Vision AI. The model gets trained to identify the number of cars in an aerial view of a parking lot.

Using MS Custom Vision you can train the model to identify any type of object within a dataset of images. Very adaptable and customisable use case for many industries to leverage.

COMPUTER VISION:

Computers can gain a high-level understanding by extracting information from digital images or video. Using digital images (from cameras & videos), deep learning models and machines can accurately identify & classify objects.

Object Detection: Allows us to identify and locate objects in an image or video.

Object detection can be used to:

• count objects in an image
• determine/ identify their precise locations
• accurately label the objects.

Azure Custom Vision is super cool and really easy to use — enables you to build and improve your own image classifiers by training the model with your own labels by passing images through it. It has a user-friendly interface to develop and deploy your own models.

How did I use MS Custom Vision AI to detect the number of cars from aerial images?

A dataset was created by uploading a high number of images into customvision.ai in order to train the model.

Here is a sample of the aerial image used to train the model.

Training Results:

Over 94,5% Performance as seen below.

[Precision (positive predictive value), Recall (sensitivity)]

Precision returns Positive Prediction Accuracy for the label.

Recall returns the True Positive Rate of the label.

Prediction Results:

The trained model was passed 2 new images from which to make predictions on (ie. new data that the model has not seen previously).

The prediction results were also very good 99,8%.

After the model has been successfully published, a “Published” label will appear next to the iteration in the left-hand sidebar.

Some key features with using Custom Vision AI:

- models can be customised based on what you want to predict

- you have the option to export a trained model to any device or container.

- moving it to a device decreases latency which is super cool.

- the model can be exported to be run offline.

- the exported classifier is embedded into an application run locally on a device for real-time classification.

For more on AI Engineering leveraging Microsoft Custom Vision have a look at this link

https://azure.microsoft.com/en-us/services/cognitive-services/custom-vision-service/

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