1. A display apparatus, comprising: an image input unit that receives an image; an image processor that performs image signal generation by performing Retinex processing on an input image received by the image input unit in a state of a first color space configured with Y-value information and color information, converting an image signal which has undergone the Retinex processing into an image signal of a second color space configured with RGB information from the first color space, and generating a new image signal by correcting the input image using an absolute value of a color space vector of the converted image signal in the second color space without changing a direction of a color space vector of the input image in the second color space; and a display that displays an image on the basis of the image signal which has undergone image processing performed by the image processor.