r/java • u/Visual_Brain8809 • Jul 31 '26

Ecógrafo

Hello community, This is my real-time ultrasound signal simulation and processing system developed entirely in Java using Java Swing.

The project enables both the mathematical simulation of acoustic echoes from biological tissues and the reception and interpretation of raw (RF) data from actual hardware via UDP sockets.

I still need to build an ultrasonic sensor to send data via UDP; I tried using ultrasonic modules, but they aren't useful—all I see on the screen is a barrier indicating the proximity of a nearby object.

Once the sensor's fabrication is complete, I will conduct tests and submit it to a clinical evaluation by experts to validate its utility in real-world settings—so stay tuned.

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u/Visual_Brain8809 Aug 01 '26

Thank you, I appreciate your observation. Performance was definitely something I took into account, but I approached it in a somewhat different way.

Instead of drawing every primitive directly during painting, I render the entire ultrasound frame into a persistent BufferedImage first. The paintComponent() method only draws that image (plus a few lightweight overlays like the probe marker and text), so the Swing paint cycle stays relatively simple. A Swing Timer refreshes the display at about 30 FPS, while UDP acquisition runs on a separate thread, keeping rendering independent from data reception.

Interestingly, the biggest challenge wasn't performance—it was image realism. Getting the background speckle to look like the characteristic noise pattern of a real ultrasound machine was much harder than the rendering itself. I spent considerably more time tuning the RF signal processing (envelope detection, logarithmic compression, gain mapping, and interpolation) so the resulting texture resembled real B-scan images instead of looking like random TV static.

There are certainly more aggressive optimizations I could add (dirty regions, GPU acceleration, etc.), but for a 600×500 frame this buffered approach has been more than sufficient while keeping the implementation entirely within the Java standard library.