1. A drive method for a solid-state imaging device having an oblique pixel pattern in which pixels are obliquely disposed, comprising the steps of: adding, separately for an odd-numbered row and an even-numbered row, x pixels in the horizontal direction and y pixels in the vertical direction, the x pixels and the y pixels having an identical color, in an area having adjacent n pixels in the horizontal direction and adjacent n pixels in the vertical direction, where n is an odd number of three or greater and n≧x≧y; and repeatedly adding the x pixels in the horizontal direction and the y pixels in the vertical direction while shifting the area having the adjacent n pixels in the horizontal direction and the adjacent n pixels in the vertical direction by m pixels in the vertical or horizontal direction, where m is an odd number of three or greater, a spatial positional relationship between the area having the adjacent n pixels in the horizontal direction and the adjacent n pixels in the vertical direction of odd-numbered rows and the area having the adjacent n pixels in the horizontal direction and the adjacent n pixels in the vertical direction of even-numbered rows being such that they are displaced from each other by m pixels in an oblique direction in the oblique pixel pattern.