Possible Applications

The difference function helps visualizing changes between two shots of the same motiv at different points in time, which is crucial for active thermography.  But almost all other areas of thermography can also benefit from this technology, e.g. comparing a electric installation before and after switching a load.

Instructions

On the left side of the program, open the images to analyze. The upper one is the first (in time), the lower one the latter. The "Invert" switch logically swaps the images, so that a positive change in temperature will be a negative one.

The direction buttons in the "Positioning" panel allow shifting one picture in the 4 directions to align both pictures, in case the camera has moved a little bit between the shots. If you switch from "Manual" to "Automatic" positioning, the program tries to do that aligning by itself.

Whenever you change a option, the result image in the lower right gets updated automatically:

 

 

 

The "Denoise" switch activates the noise-cancellation, which can be fine-tuned with a slider below:

 

 

Switching on "Blower Mode" adds a fusion with a grey scale image, which is a cool way to visualize the changes:

 

As with every other function, results can be saved as fully radiometric BMT file, even the greyscale fusion.

 The NetDBooster is able to raise the thermal resolution above the limits of the camera. To achieve this, you have to make several shots with the camera mounted on a tripod to make sure the visual angle is always the same. After loading these files in IrTool, they are merged into one picture to increase the signal to noise ratio. The more files, the better. This function can be extremely useful for owners of the cheaper Testo models, as they have a lower thermal resolution.

The following example was made of 13 shots from a Testo 875-1. On the left hand, one of the original shots can be seen - the layout of the floor heating can hardly be identified. The computed thermogram on the right side may not be as good as if it was made with a high-end camera, but the floor heating, the floor tiles and the walls on the right are easily identified.

In most cases, 4-6 shots are enough to produce an impressive result, which can be saved as a fully radiometric bmt file afterwards.

All functions computing a new image provide the possibility to save the outbut in a BMT file. Therefore it is possible to open these thermograms in IrSoft for editing or using them in reports. No other software delivers that until now.

For functions combining several images, it is reasonable to make the shots from a tripod, to make sure the field of view is exactly the same. Tripod shots don't work with SuperResolution. Therefore IrTool works only on the physical resolution of the camera.

The "settings" dialog (reachable via the button in the upper right) allows switching the display of temperature scales and file names on and off.

This function combines two images. Automatic or manual alignment of the images is possible, please look at the difference feature for a detailed description.

This function can be used with one of three modes: Average, Highest and Lowest.

  • Average computes the arithmetic average of the two shots
  • Highest takes the hottest spots of each image
  • Lowest the coldest spots

Average
Average
Highest
Highest
Lowest
Lowest

This feature visualizes all data kept in a BMT file, like the camera model, emissivity or transmissivity.

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