banner image
No data available.
Please log in to see this content.
You have no subscription access to this content.
No metrics data to plot.
The attempt to load metrics for this article has failed.
The attempt to plot a graph for these metrics has failed.
Fusion of visual and infrared thermography images for advanced assessment in non-destructive testing
Rent this article for
View: Figures


Image of FIG. 1.
FIG. 1.

Photograph of the hybrid camera with IR camera, VIS camera, dichroitic beam splitter, and GigE (Gigabit Ethernet) switch. The infrared camera has 640 × 512 pixels, whereas the visible camera contains 1600 × 1200 pixels. Field of view of the IR camera is 20° × 16° (horizontal × vertical) and of the VIS camera 22° × 16°. The housing is partially removed in order to better show the assembly. The beams of the IR and the visible images enter the camera from the front side opposite to the IR camera (dashed-dotted line) and are split up at the beam splitter into an IR part (solid line) and a visible part (dotted line). The intermediate wall with the antireflection coating serves to suppress back-reflections from the IR camera.

Image of FIG. 2.
FIG. 2.

Visualization modes: (a) 100% VIS; (b) black or 100% VIS; (c) 100% VIS or 100% IR; and (d) 100% IR.

Image of FIG. 3.
FIG. 3.

(a) Drilling a hole with a drilling machine in an aluminum block. The IR information of the hot swarf is overlaid on the visual image. (b) A steel block is finished with a grinding machine. The hot steel splinters are shown in the IR view. In both images the surroundings at room temperature are shown in the VIS information.

Image of FIG. 4.
FIG. 4.

Highlighted defect indications of an ultrasonic thermography data set (a) overlaid on the IR camera image and (b) overlaid on the VIS camera image.

Image of FIG. 5.
FIG. 5.

Photograph of the setup for active ultrasonic thermography with the hybrid camera and the ultrasonic exciter for 3D surface information acquisition. A calibration pattern and the red laser beam to obtain the 3D surface topography of the component under test are displayed as well.

Image of FIG. 6.
FIG. 6.

(a) 3D model from triangulation measurement; (b) fusion of the 3D model with the hybrid picture; (c) hybrid picture with calibration pattern for the 3D surface acquisition in the background; and (d) and (e) the position and size of the defects can be better estimated on the 3D model when it is rotated in space.

Image of FIG. 7.
FIG. 7.

(a) IR picture; (b) IR picture with overlaid thermography result and filtered red laser cross from the VIS; (c) filtered red laser-cross from the VIS picture; (d) thermography result; (e) VIS picture with red laser cross; and (f) VIS picture with overlaid thermography result.


Article metrics loading...


Full text loading...

This is a required field
Please enter a valid email address
752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Fusion of visual and infrared thermography images for advanced assessment in non-destructive testing