What if we made a camera that sees in reverse?

Summary by Krater

The creator designs, builds, and tests a custom camera mounted on a rotating arm that can capture images around walls by sweeping a photodetector sensor across an arc and reconstructing a full image.

From the video

Answers: How do you build a camera that can see around walls?

• pinhole camera design
• photodetector sensors
• transimpedance amplifiers
• image reconstruction
• orthographic projection optics

What it concludes

• A photodetector camera mounted on a rotating arm can capture images of objects hidden behind walls by sweeping across an arc and reconstructing the data.
• Using a pinhole camera setup with a tiny aperture limits the amount of light that can pass through, resulting in very low signal strength.
• Rotating the sensor at high speeds requires custom hardware and transimpedance amplification to boost and process the weak signals into a coherent image.
• Applying orthographic projection principles and color filters allows the custom camera to produce color images from multiple spectral scans.