Image data generating apparatus, printer, image data generating method, and non-transitory computer readable medium for extracting one or more pixels corresponding to a metallic-color region

An image data generating method comprising:

• extracting one or more pixels corresponding to a metallic-color region expressed by a metallic color, by using lightness and saturation of a read image and lightness and saturation of a captured image, the read image being obtained by reading a document having the metallic-color region, the captured image being obtained by capturing an image of the document;
• and
• generating image data in which the one or more pixels corresponding to the metallic-color region and extracted in the extracting are colored in the metallic color.

A non-transitory computer readable medium storing a program causing a computer to execute a process, the process comprising:

• extracting one or more pixels corresponding to a metallic-color region expressed by a metallic color, by using lightness and saturation of a read image and lightness and saturation of a captured image, the read image being obtained by reading a document having the metallic-color region, the captured image being obtained by capturing an image of the document;
• and
• generating image data in which the one or more pixels corresponding to the metallic-color region and extracted in the extracting are colored in the metallic color.