A digital camera includes a memory, and pixel data cut out from the memory is subjected to ½ horizontal thinning processing by a ½ horizontal thinning circuit when a zooming magnification is equal to or larger than “2”, and the thinned pixel data is written to an image buffer. A zooming circuit performs zooming processing on the thinned pixel data stored in the image buffer. Here, when the zooming magnification is smaller than “2”, the zooming circuit performs the zooming processing on original pixel data being read from the memory and then stored in the image buffer.