FAST STORAGE METHOD FOR IMAGE DATA VALUABLE FILE IDENTIFYING METHOD AND IDENTIFYING DEVICE THEREOF

Disclosed are a valuable file identifying method and an identifying device thereof. The identifying method and the identifying device store image data of a valuable file using a fast storage method for image data. The fast storage method for image data comprises: compulsively converting collected single byte image data into long integer image data; using N data masks which correspond to each other through a 'bitwise AND' operation to extract the long integer image data in such a manner that N points are extracted from M * N points in each line and one point is extracted from L points in each column where N is an integer greater than or equal to 2 L and M are all integers greater than or equal to 1; and integrating the data extracted respectively by N data masks through a 'bitwise OR' operation to obtain coded image data and store same. In conclusion the present invention converts single byte image data into long integer image data and extracts multipoint data at one time using a plurality of data masks which correspond to each other reducing the number of operations and achieving fast compressed storage of images.