Raster image editing is useful to achieve a uniform visual effect if a product catalog includes photos taken with various lights. It is important to adjust white balance, exposure, saturation and contrast to their images as close as possible to a common visual standard, and then to use that reference image as a guide for the rest of the photographs, Visuals Clipping explains. But it is important to ensure that each image should be verified separately, as product colours may still be inaccurate, especially when it comes to items such as clothing, cosmetics or others where the colour is a critical part of the buying decision.