Kim's research was part of her doctoral thesis. In it, she researched methods for charting and optimizing the precision of machines for dimensional measurement. In Osaka, she presented a new 'calibration object'.
“Two problems arise when measurements are being taken. First, after taking the measurements, you have to rescale the object to its real size. That is, you have to know precisely how many times it has been magnified. Second, the edge of the object is made up of a whole range of grayscales between white and black and you have to determine which grayscale determines the border between the material and the background (surrounding light). The software here sometimes goes wrong, so a correction is necessary. Well, the method illustrated using this calibration object allows both rescaling to the correct size and correcting the grayscale.”
“To do the calibration (rescaling and correcting the edge), a number of measurements of the object are also taken with a coordinate measuring machine,” Kim continues. “It's true, this can only measure outer forms, but it is much more precise so that we have a reference to compare with our CT measurements. Based on this, we can correct the inside measurements so that these become more precise.”
/jaargang-20-1/images/20_01_06b.jpg "Kim Kiekens at the 10th International Symposium on Measurement and Quality Control in Osaka")
