Wednesday, June 11, 2008

.. on digital scanning

This hand-drawn plot was obtained from the paper Some Dynamic Applications of Liquid Manometrs (American Journal of Physics, 1935).




















After scanning the image in grayscale, Paint was used to determine the locations of the points on the curve and replot them in MS Excel. To get the exact values for the curve, the ratio of the number of pixels per unit (x and y axis) was incorporated. Below is the superimposed plot of the original and the reconstructed.
















Since I was able to accurately reconstruct the plot, i want to give myself a 10. Also, i get the bonus point for overlaying the two plots.

1 comment:

Jing said...

Yep, that looks like good work there. Well done Mark!