Capturing conditions and capturing of an imaging apparatus, which captures a plurality of color patches displayed on a monitor, are controlled. Imaging data is inputted from the imaging apparatus. Measurement values of the plurality of color patches are calculated from the imaging data using color conversion characteristics corresponding to the capturing conditions. First capturing conditions used at start of the capturing for the calculation of measurement values based on the imaging data captured by the imaging apparatus using initial capturing conditions. After the capturing for the calculation of measurement values is started, when the imaging data is input, it is determined whether or not perform the capturing by changing the capturing conditions.