A digital content rights management method and system belongs to the digital content rights management technique field. The base station comprises a field programmable gate array with an upper side and a bottom side, a thermoelectric cooler with a hot side and a cold side, a thermal pad, and an anti-radiation cover. An image processing device is provided to divides the captured image into a plurality of areas, determine a directional characteristic shown by a texture of each of the divided areas, and estimate the tilt angle of the captured image based on one or more areas whose textures have the unidirectional characteristic to correct the captured image using the estimated tilt angle. According to one aspect, the textured image is obtained by scanning one or more texture images into memory.