Image processing device and image processing method

The embodiment of the invention discloses an image processing device, which comprises a memory, a first buffer and a first arithmetic unit. The memory stores the data sequence of a to-be-processed two-dimensional image, wherein the data sequence contains a plurality of two-dimensional data points X[j][i][d]. When both j and I are 0 and d is progressively increased from 0 to d till reaching a data range corresponding to d, I is progressively increased to reach a data range corresponding to i. finally, j is progressively increased to reach a data range corresponding to j. in this way, the data sequence of the to-be-processed two-dimensional image can be obtained. The first buffer acquires a plurality of first data points out of the data sequence according to a preset rule. The first arithmetic unit conducts the weighted and accumulative operation on the plurality of first data points to successively obtain processing results. The embodiment of the invention also discloses an image processing method. Based on the method, the to-be-processed two-dimensional image is read out only once, so that the processing efficiency is high. Meanwhile, the circuit construction is simple. Therefore, the energy efficiency ratio and the performance during the CNN algorithm executing process are improved.