A portable communication device (100, 901) comprising: a camera module (110, 980) including an image sensor (113, 1030) including a plurality of image pixels and a control circuit (115, 1030) configured to control the image sensor (113, 1030), wherein the plurality of image pixels are arranged in an MXM matrix and a plurality of colour filters are arranged on the plurality of image pixels such that a single colour filter is arranged on NXN pixels which are included in a same colour channel, N being a natural number equal to or greater than 2 and smaller than M and a number of colour filters being equal to /; a display (140, 960); and a processor (150, 1060) configured to: activate an image capturing function of the camera module (110, 980); based on the image capturing function being activated, obtain first raw image data comprising a specified color channel pattern generated by binning image data obtained from a specified number of image pixels among the NXN pixels corresponding to a same color channel, by using the image sensor (113, 1030), wherein the specified colour channel pattern corresponds to a specific arrangement of colour filters repeating on the image sensor including Red, Green, Blue filters; display a first image generated based on the first raw image data on the display (140, 960); while the image capturing function is activated, receive an input associated with an adjustment of a zoom setting; obtain second raw image data comprising the specified color channel pattern, generated by re-mosaicing image data obtained from some of the plurality of image pixels corresponding to a portion of the image sensor selected based on the input, by using the image sensor, wherein the re-mosaicing comprises exchanging with each other image data among the obtained image data corresponding to said portion that do not correspond to the specified color channel pattern to generate the specified colour channel pattern; and display a second image generated based on the second raw image data on the display (140, 960). a camera module (110, 980) including an image sensor (113, 1030) including a plurality of image pixels and a control circuit (115, 1030) configured to control the image sensor (113, 1030), wherein the plurality of image pixels are arranged in an MXM matrix and a plurality of colour filters are arranged on the plurality of image pixels such that a single colour filter is arranged on NXN pixels which are included in a same colour channel, N being a natural number equal to or greater than 2 and smaller than M and a number of colour filters being equal to /; a display (140, 960); and a processor (150, 1060) configured to: activate an image capturing function of the camera module (110, 980); based on the image capturing function being activated, obtain first raw image data comprising a specified color channel pattern generated by binning image data obtained from a specified number of image pixels among the NXN pixels corresponding to a same color channel, by using the image sensor (113, 1030), wherein the specified colour channel pattern corresponds to a specific arrangement of colour filters repeating on the image sensor including Red, Green, Blue filters; display a first image generated based on the first raw image data on the display (140, 960); while the image capturing function is activated, receive an input associated with an adjustment of a zoom setting; obtain second raw image data comprising the specified color channel pattern, generated by re-mosaicing image data obtained from some of the plurality of image pixels corresponding to a portion of the image sensor selected based on the input, by using the image sensor, wherein the re-mosaicing comprises exchanging with each other image data among the obtained image data corresponding to said portion that do not correspond to the specified color channel pattern to generate the specified colour channel pattern; and display a second image generated based on the second raw image data on the display (140, 960). activate an image capturing function of the camera module (110, 980); based on the image capturing function being activated, obtain first raw image data comprising a specified color channel pattern generated by binning image data obtained from a specified number of image pixels among the NXN pixels corresponding to a same color channel, by using the image sensor (113, 1030), wherein the specified colour channel pattern corresponds to a specific arrangement of colour filters repeating on the image sensor including Red, Green, Blue filters; display a first image generated based on the first raw image data on the display (140, 960); while the image capturing function is activated, receive an input associated with an adjustment of a zoom setting; obtain second raw image data comprising the specified color channel pattern, generated by re-mosaicing image data obtained from some of the plurality of image pixels corresponding to a portion of the image sensor selected based on the input, by using the image sensor, wherein the re-mosaicing comprises exchanging with each other image data among the obtained image data corresponding to said portion that do not correspond to the specified color channel pattern to generate the specified colour channel pattern; and display a second image generated based on the second raw image data on the display (140, 960).