Update README.md

README.md

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 Python code for reading profilometry data from a Veeco Wyko NT9100,  preprocessing it, and saving it into another format for further processing. 
 
 ![A picture of the profilometer.](assets/Veeco_Wyko_NT9100_photo.png)
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 *A picture of the Veeko profilometer.*
 
 In the Veeco software, the file should be saved in ASC format.
 
 ![ASC options.](assets/Veeko_ASC_save_opts.png)
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 *Options for the ASC format in the Veeko software.*
 
 ### Notes 
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 The following figure shows an example of the process on data from a face of a 2 mm polyhedral particle.
 
 ![Illustration of the processing steps](assets/Example.png)
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 *Illustration of the steps the code performs, form left to right: reading, cleaning, filling.*
 
 ## Functions
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 Simple usage, the only parameter is the input file name. It outputs the profilometry data, what I call the height field `hfld`, as well as an intensity field `ifld`. 
 
 ![Illustration of an intensity field.](assets/Example_intensity.png)
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 *The intensity field from the data shown in the example above.*
 
 ### `removePeaks`