is white it would be appreciated that recorded images for the foil could be a grey tone or color image fig2 shows another example of an imaging station 42 of a system 20 for detecting embossed characters on a card that uses an imaging device 18 in the form of a contact image sensor cis 18 the construction and operation of the cis is known for example the cis 18 has an image sensor placed in near direct contact with the portion 6 a of the foil the cis 18 includes a linear array of detectors covered by a focusing lens and can be flanked by light emitting diodes leds for illumination it is to be understood that cis can also use backlight for illumination the cis 18 can be positioned on the carrier layer side as shown in fig2 or on the opposite side i e on the coloration material layer side to digitize the image 34 once the image 34 is imaged the image can be processed and used to make various determinations about the embossed characters 32 on the card 2 or the quality of the application of the coloration material to the embossed characters the image can be processed by conventional optical character verification ocv and or optical character recognition ocr algorithms ocv operates by reading data associated with the under test image and comparing the data against expected data associated with an expected image and determining if any differences exist between the.