Image processing system for magnetic domain observation

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Abstract
This research presents the design and results of an image processing system for static and dynamic observation of magnetic domains. The technique is based on the use of a polarizing microscope, a CCD camera, a frame memory, and a personal computer. Because it is not necessary to use the processed data for real time control, a system was designed in which the data processing was performed after the acquisition of all data. The static image is obtained by a combination of averaging, subtraction of background noise, and median filtering methods. A dynamic image with 85(V)×96(H) pixels/field is acquired at the sampling rate of 30 fields/s. Using this system, static and dynamic domain images of Supermalloy multilayered core and amorphous ribbon were obtained.