An embodiment of the invention provides an image processing apparatus and method capable of reducing power consumption by controlling supply of a clock to a memory when correction is performed on image data. The image processing apparatus includes an image correction unit including a plurality of line memories to maintain image data line-by-line and perform correction on the image data, a number-of-line-memories determination unit for determining the number of line memories necessary for the correction performed by the image correction unit line-by-line, and a line memory control unit for controlling supply of a clock to the plurality of line memories based on the number of line memories determined by the number-of-line-memories determination unit to supply a clock to the line memories used for the correction performed by the image correction unit line-by-line and stop supply of the clock to line memories not used for the correction.