In the present disclosure, ‘magnitudes of the frequency components’ in the image may denote magnitudes of one or more frequency components configuring the corresponding image. The image capturing apparatus 100 may perform a 2D DCT on the image to identify the magnitudes of the one or more frequency components. In other words, the image capturing apparatus 100 may identify the magnitudes of one or more frequency components configuring the corresponding image on a 2D space.

The image capturing apparatus 100, otherwise, may perform a one-dimensional DCT on the image, and then may identify magnitudes of one or more frequency components included in a line, with respect to each line.

However, the above-described DCT operation is an example method for identifying the magnitude of the frequency component in the image, and the inventive concept is not limited thereto. Therefore, the image capturing apparatus 100 may use other transformation methods than the DCT, e.g., Fourier Transformation, or may use various well-known methods of identifying the frequency components of the image.

Referring back to FIGS. 3A to 3B, a method of identifying the magnitudes of one or more frequency components in the image, by the image capturing apparatus 100 according to the embodiment, will be described below.

For convenience of description, it is assumed that the image shown in FIG. 3A is processed in units of image blocks that are obtained by splitting the image in a predetermined size. Also, it is assumed that magnitudes of one or more frequency components configuring an image block 311 are as shown in FIG. 3B.