An image processing method, comprising steps of: generating a first scale binary image from an image, wherein the first scale is smaller than the original scale of the image; detecting at least one text line in the image based on the first scale binary image; generating a second scale binary image from the image, wherein the second scale is larger than the first scale; for each text line, calculating a shape matching degree between a corresponding section in the first scale binary image and a corresponding section in the second scale binary image, and removing the text line for which the shape matching degree is lower than a predetermined level as noise; for one or more of the remaining text line(s), performing optical character recognition on corresponding section(s) in the second scale binary image to determine character orientation(s) of corresponding text line(s); and determining the orientation of the image according to the character orientation(s), wherein the step of detecting the text lines based on the first scale binary image comprises: detecting horizontal text lines and vertical text lines based on the first scale binary image; and in case that a horizontal text line and a vertical text line that are detected overlap with each other, detecting a text block orientation of a combined area comprising the horizontal text line and the vertical text line based on the first scale binary image, and removing the text line whose orientation is different from the text block orientation as noise. generating a first scale binary image from an image, wherein the first scale is smaller than the original scale of the image; detecting at least one text line in the image based on the first scale binary image; generating a second scale binary image from the image, wherein the second scale is larger than the first scale; for each text line, calculating a shape matching degree between a corresponding section in the first scale binary image and a corresponding section in the second scale binary image, and removing the text line for which the shape matching degree is lower than a predetermined level as noise; for one or more of the remaining text line(s), performing optical character recognition on corresponding section(s) in the second scale binary image to determine character orientation(s) of corresponding text line(s); and determining the orientation of the image according to the character orientation(s), wherein the step of detecting the text lines based on the first scale binary image comprises: detecting horizontal text lines and vertical text lines based on the first scale binary image; and in case that a horizontal text line and a vertical text line that are detected overlap with each other, detecting a text block orientation of a combined area comprising the horizontal text line and the vertical text line based on the first scale binary image, and removing the text line whose orientation is different from the text block orientation as noise. detecting horizontal text lines and vertical text lines based on the first scale binary image; and in case that a horizontal text line and a vertical text line that are detected overlap with each other, detecting a text block orientation of a combined area comprising the horizontal text line and the vertical text line based on the first scale binary image, and removing the text line whose orientation is different from the text block orientation as noise.