Abstract: Disclosed are a method for preparing a pure isophthalaldehyde bisulfite adduct free from impurities through a specific purification process, and use thereof as a starting material for polymerizing polybenzimidazole under a mild condition. According to the present disclosure, it is possible to obtain a pure isophthalaldehyde bisulfite adduct free from impurities, such as unreacted materials or byproducts. In addition, it is possible to accomplish industrial mass production of a high-molecular weight polybenzimidazole by using the adduct as a starting material for polymerizing polybenzimidazole under a mild condition in an organic solvent.

Abstract: Disclosed are a method for preparing a pure isophthalaldehyde bisulfite adduct free from impurities through a specific purification process, and use thereof as a starting material for polymerizing polybenzimidazole under a mild condition. According to the present disclosure, it is possible to obtain a pure isophthalaldehyde bisulfite adduct free from impurities, such as unreacted materials or byproducts. In addition, it is possible to accomplish industrial mass production of a high-molecular weight polybenzimidazole by using the adduct as a starting material for polymerizing polybenzimidazole under a mild condition in an organic solvent.

Abstract: The present disclosure relates to an apparatus and a method for recognizing media and a financial device. The apparatus for recognizing media according to an exemplary embodiment of the present disclosure comprises: an image sensor; a skew detector configured to detect skew of the media from media image acquired by the image sensor; a noise detector configured to detect a linear component in a region of interest which include character of the media image and a noise included in the media image based on direction information of the detected linear component and the skew of the media; and a controller configured to remove the detected noise from the region of interest and recognize the character of the region of interest from which the noise is removed.

Abstract: The present disclosure relates to an apparatus and a method for recognizing media and a financial device. The apparatus for recognizing media according to an exemplary embodiment of the present disclosure includes: an image sensor configured to emit different first light source and second light source to media including at least one character to acquire a first image and a second image corresponding to each light source; a noise detector configured to detect noise of a region in which the character is included from the first image and the second image; and a controller configured to combine the first image and the second image depending on the detected noise information to recognize the character included in the media.

Abstract: The present disclosure relates to an apparatus and a method for recognizing media and a financial device. The apparatus for recognizing media according to an exemplary embodiment of the present disclosure comprises: an image sensor; a skew detector configured to detect skew of the media from media image acquired by the image sensor; a noise detector configured to detect a linear component in a region of interest which include character of the media image and a noise included in the media image based on direction information of the detected linear component and the skew of the media; and a controller configured to remove the detected noise from the region of interest and recognize the character of the region of interest from which the noise is removed.

Abstract: The present disclosure relates to an apparatus and a method for recognizing media and a financial device. The apparatus for recognizing media according to an exemplary embodiment of the present disclosure includes: an image sensor configured to emit different first light source and second light source to media including at least one character to acquire a first image and a second image corresponding to each light source; a noise detector configured to detect noise of a region in which the character is included from the first image and the second image; and a controller configured to combine the first image and the second image depending on the detected noise information to recognize the character included in the media.

Abstract: The present invention relates to a method for inhibiting melanin generation or a method for skin whitening using an active fraction of Erigeron breviscapus extract or matricaria acid methyl ester isolated from the same. The active fraction obtained by solvent fractionation from Erigeron breviscapus whole plant extract and (2Z,8Z)-matricaria acid methyl ester isolated from the fraction inhibit melanin generation in melanocytes without cytotoxicity, so that they can be effectively used for skin whitening.