1. An image processing device comprising: a processor; and a memory storing computer-readable instructions therein, the computer-readable instructions, when executed by the processor, causing the image processing device to perform: acquiring target image data including each pixel value of a plurality of pixels, the target image data representing a target image by using the plurality of pixels; extracting a plurality of photographic pixels and a plurality of non-photographic pixels from the plurality of the pixels in the target image; generating photographic correspondence data; generating non-photographic correspondence data, the non-photographic correspondence data being different from the photographic correspondence data; converting an original pixel value of a pixel of the plurality of photographic pixels into a respective converted pixel value by using the photographic correspondence data; and converting an original pixel value of a pixel of the plurality of non-photographic pixels into a respective converted pixel value by using the non-photographic correspondence data.