Cracks in Steel

Mathew Peet

The first three photographs illustrate a technique to remove spurious information. The first photograph shows an intergranular crack originating from the surface of a sample of steel. In addition, there are a lot of distracting machining marks. The second image shows the Fourier transform of the photograph, with the information connected with the machining marks highlighted using arrows. This information was edited out of the Fourier transform and the image reconstructed. The reconstructed image no longer contains the original machining marks.


The unedited Fourier transform

After slight editing, less than illustrated in the large micrographs above

Reconstruction after the slight editing of the fourier transform


More photographs of cracks

crack_top_of_FT001 crack_side_CP001 crack_side_CP001_t
crack_side_CP001_r crack_side_CP001_s crack_top_FT001_pol
crack_top_of_FT001_pol2 crack_top_of_FT001_pol3 image1x05obj_mm
image2a_x10obj_mm image2_x10obj_mm image3_x20obj_mm
crack_top_of_FT001_pol4 image4_top_x5obj_mm image5_top_x5obj_mm
image6_top_x5obj_mm image7_top_x5obj_mm image8_top_x5obj_mm
image9_top_x5obj_mm image2_x10obj image2a_x10obj
image10_top_x5obj_mm image1x05obj image3_x20obj
image4_top_x5obj image5_top_x5obj image6_top_x5obj
image7_top_x5obj image8_top_x5obj image9_top_x5obj

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