In addition, that the image capturing apparatus 100 determines the frequency filter to correspond to the difference between the current bitrate and the target bitrate may denote that the greater is the difference between the current bitrate and the target bitrate increases, a filter capable of reducing magnitudes of the more high frequency components may be determined as the frequency filter. In other words, as the difference between the bitrates increases, the image capturing apparatus 100 may select a filter capable of excluding more high frequency components from the image as the frequency filter.

It is assumed that the magnitudes of one or more frequency components that are identified through the above-described methods are arranged on the 2D plane as shown in FIG. 3B. Assuming the above, the frequency filter according to the embodiment may reduce magnitudes of frequency components other than frequency components existing between the origin point and the predetermined boundary line. In other words, the frequency filter may be a filter that maintains only the frequency components located between the origin point and the predetermined boundary line on the 2D plane.