Patent ID: 8004569

Claim:
A method for obtaining a still image frame with anti-vibration clearness, comprising the steps of: capturing a plurality of raw image frames successively during a capturing period under a capturing instruction; compressing the raw image frames respectively, according to a predetermined compression rule, into a plurality of corresponding compressed image frames each of which has a data length after such compression; storing the compressed image frames according to a predetermined sequence; and comparing the data lengths of the compressed image frames stored according to the predetermined sequence, and based on the comparison, selecting a desired still image frame, according to the compressed image frame among all of the compressed image frames, of which the data length has a unique feature; wherein the compressed image frames are temporarily stored in a first register and a second register; the data length of the compressed image frame stored in the first register is compared with the data length of the compressed image frame stored in the second register, to determine in which of the first register and the second register the compressed image frames are stored; if a first compressed image frame is stored in the first register and a second compressed image frame is stored in the second register, when the data length of the compressed image frame stored in the first register is smaller than the data length of the compressed image frame stored in the second register, a third compressed image frame is stored in the first register, otherwise, the third compressed image frame is stored in the second register.