Thermal imaging, native on the Mac.

Features

What is in it

• Raw values, not colours

  The camera gives a raw value per pixel at 1/64 K. HeatPeek works from those throughout – every measurement, correction and recording reads them, rather than reading a temperature back out of a false-colour picture.

• Spots and areas

  Nine spots, four areas. Each has a name, limits, a colour, a trend curve and a CSV column. Coordinates live in the sensor's raw grid, so they survive rotation and mirroring.

• Emissivity

  Stefan-Boltzmann correction as a lookup table over the raw values – one array read per pixel instead of two pow calls. The app states the noise gain and the floor below which the correction has no solution.

• Scaling

  The camera's own gain, per frame, or a fixed range. Under that gain the app reads the curve back out of the frame instead of assuming a straight line, so the bar is labelled there too.

• Two Syphon sources

  A shared IOSurface texture: no JPEG, no HTTP. Picture and readings kept apart so a scene can place them independently.

• Record and read back

  PNG with the full temperature matrix, H.264 MP4, readings as CSV at 5 Hz. Both CSV formats open again in the app – as curves, or as a picture with its distribution.

Measuring

What is measured, and how closely

A click places a spot, a drag an area; either can be moved. The readings block shows the scene's minimum, mean and maximum, and every measurement below that.

Emissivity is where thermal measurements go wrong. The presets name the surface condition, because that is what sets the value: polished copper sits at 0.05, oxidised copper at 0.65. At low values the app says by how much it multiplies any error in the reading.

OBS

Straight into OBS

The finished picture is already a GPU texture. Syphon hands that one on – no re-encoding, no file, no server in between – and OBS reads it directly. What is switched on in the window arrives there unchanged: the image information applies to window and source alike.

Two Syphon sources

HeatPeek

The camera picture in the sensor's aspect ratio, carrying whichever image information you switched on.

HeatPeek Stats

Trend curve and readings, 1280 × 720, with an alpha channel. Opacity all the way down to zero – then only text and curves remain.

For tools without Syphon there is an MJPEG stream on localhost – on your own machine only, never on the network.

Hardware

Supported cameras

The same hardware is sold under several names – the P3 is the device also marketed as the “InfiRay P2 Pro”. What identifies a camera is its VID and PID, not the print on the case.

Tested with the P3. The P1 is covered end to end with synthetic frames, but not yet against a real device.

Install

Three steps

1. Download the disk image and drag HeatPeek to “Applications”.
2. On first launch, right-click → “Open”. The app is signed but not notarised, so macOS asks once.
3. Plug the camera in over USB-C – HeatPeek connects on its own.

The click you hear is the camera's shutter calibration. “Camera off” in HeatPeek resets the USB device so it falls silent once you are done.

Source

Open and free