Apparatus for media recognition and method for media kind distinction with the same
Disclosed is a medium recognition apparatus for determining the type of a medium by using color information obtained by scanning the inserted medium, as well as a method for determining the type of a medium by using the apparatus. Color information and size information obtained by scanning only a partial region of a medium image, the hue of the medium image scanned by the image sensor, or RGB channel color information scanned by the color sensor is compared with pre-stored reference information to determine the type of the medium. This guarantees that the type of the medium is determined quickly and accurately based on simple comparing results.
1. An apparatus for recognizing a banknote, the apparatus comprising:
a sensor unit configured to obtain color information and size information regarding the banknote;
an extraction unit configured to extract individual color information from the color information regarding two or more predetermined color components;
a determination unit comprising a first determination unit configured to determine a type of the banknote based on an order of amounts of the individual color information regarding the two or more predetermined color components; and
a control unit configured to control the first determination unit,
wherein the determination unit further comprises:
a second determination unit configured to determine a type of the banknote according to a result from the first determination unit and a range of the individual color information regarding at least one of the two or more predetermined color components; and
a third determination unit configured to determine the type of the banknote according to a result from the second determination unit and the size information of the banknote.
2. The apparatus as claimed in claim 1 , wherein the individual color information regarding one of the two or more predetermined color components is summation information of the one of the two or more predetermined color components.
3. The apparatus as claimed in claim 1 , wherein the sensor unit comprises a color image sensor for scanning the entire region of the banknote to obtain color information and size information regarding a scanned banknote image.
4. The apparatus as claimed in claim 1 , wherein the apparatus further comprises a storage unit for storing information regarding an order and ranges of amounts of color information contained in a region of a predetermined banknote type, and the size of the predetermined banknote type.
5. A method for determining the type of a banknote by using a medium recognition apparatus, the method comprising the steps of:
scanning the banknote to generate an image of the banknote;
identically converting sensitivity for each channel of color information outputted from color sensors;
calculating determination data regarding the banknote based on the converted output signal;
comparing the calculated determination data with pre-stored reference data; and
determining a type of the banknote according to the comparison result,
wherein the calculating step comprises the steps of:
calculating a skew of the banknote generated during transfer based on the converted output signal;
calculating a height of the banknote by using the calculated skew and the difference between an entry time point and an exit time point of the banknote; and
calculating a hue of the banknote based on the converted output signal.
6. The method as claimed in claim 5 , wherein, in the scanning step, the color sensors are arranged side by side to scan left and right surfaces of the banknote, respectively.
7. An apparatus for recognizing a banknote, the apparatus comprising:
a sensor unit for obtaining color information and size information regarding the banknote; and
a determination unit for determining a type of the banknote based on color information and size information regarding the banknote obtained from the sensor unit,
wherein the apparatus further comprises:
a conversion unit for identically converting sensitivity for each channel of color information outputted from the sensor unit; and
a calculation unit for calculating a skew, height, and hue of the banknote based on the converted output signal,
wherein the calculation unit comprises:
a skew calculation unit for calculating the skew of the banknote by using the converted output signal;
a height calculation unit for calculating the height of the banknote by using the calculated skew and the difference between an entry time point and an exit time point of the banknote; and
a hue calculation unit for calculating the hue of the banknote based on the converted output signal.