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Counting Objects in Images

Using only a few lines of code, it is possible to count the number of objects in a image. It is important to do the image acquisition with a standard background.
There are some basic steps:
1. Original image.
2. Apply a Gaussian filter to reduce image noise.
3. Binarize to get only a black-and-white binary image.
4. Count the number of elements (white spots) with Mathematica's built-in function ComponentMeasurements, which returns a list with the center of each cluster.
5. Original image with objects counted.
Use the tabs to see the intermediate steps; to see the steps, hover over the images.

SNAPSHOTS

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DETAILS

The images were captured with a USB camera connected to a Raspberry Pi computer.
This code was presented previously at two events:
Embedded System Conference (ESC) 2014, São Paulo, Brazil
Semana FCI 2015, Mackenzie University, São Paulo, Brazil
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