1. An image processing apparatus comprising: a processor; and memory storing non-transitory computer readable instructions that, when executed by the processor, cause the image processing apparatus to execute: acquiring target data representing a target image, the target data being acquired from an image inputting device; calculating, for each of a plurality of target pixels forming the target data, a density relation value related to density of the target pixel; selecting a conversion color for an object pixel among the plurality of target pixels; converting a pixel value of the object pixel to generate converted data such that, the higher the density represented by the density relation value of the object pixel, the closer the pixel value of a pixel of the converted data to a value indicative of the conversion color for the object pixel; and communicating the converted data to an image outputting device wherein the converting includes converting the pixel value of the object pixel such that, the lower the density represented by the density relation value of the object pixel, the closer the pixel value of the pixel of the converted data to a specific value, wherein the specific value is a value indicative of the color of a background image included in the target image, and wherein the computer readable instructions, when executed by the processor, cause the image processing apparatus to execute: analyzing the target data to calculate the value indicative of the color of the background image and deciding the specific value coinciding with the calculated value.