1. An image processing apparatus, comprising: an image acquisition unit that acquires an image; a correction unit that corrects pixel values of the image acquired by the image acquisition unit by using correction coefficients to produce a corrected image, wherein the pixel values include pixel values for red, green, and blue pixels of image data configuring the image, the correction coefficients include a designated correction coefficient for a red pixel, a green pixel, and a blue pixel, the corrected image being configured by image data having corrected pixel values that are calculated by multiplying the pixel values of the image data with respective designated correction coefficients for the red pixel, the green pixel, and the blue pixel, the designated correction coefficient being predetermined and independent of ambient light; an object recognition unit that recognizes an object in the corrected image; a storage unit that stores in advance standard color characteristics of a predetermined object that is a recognition target, the recognition target being a predetermined light with a fixed color; a color characteristics acquisition unit that if the object is recognized by the object recognition unit, acquires color characteristics of the recognized object; a comparison unit that compares the color characteristics of the recognized object acquired by the color characteristics acquisition unit with the standard color characteristics of the same predetermined object stored in advance by the storage unit; and an updating unit that updates the designated correction coefficients of the red pixel, the green pixel, and the blue pixel used by the correction unit based on a result of comparison of the color characteristics and the standard color characteristics so as to reduce a difference between the color characteristics and the standard color characteristics, wherein: the comparison unit compares the color characteristics with the standard color characteristics in a predetermined color space; and the updating unit acquires an extent of deviation of the color characteristics from the standard color characteristics in the color space, and updates the designated correction coefficients of the red pixel, the green pixel, and the blue pixel based on the extent of deviation in the color space.