CIS for coin printing and minting

Further field of application of the CIS with Shape-from-Shading

The Contact Image Sensor with Shape-from-Shading illumination also delivers excellent results with coins. As an example, a 2-euro coin is evaluated in the illustration. The highs and lows can be seen clearly and with pin-sharp definition. Since even the smallest scratches are reproduced, you can detect damages very easily with your image processing. Ideally, the gradient images in x and y are used for this purpose. The calculated height image shows the different levels of the coin. The larger the gray value, the higher the level.

Posted in General, Shape from Shading.