1. A system, comprising: a sensor configuration component that when executed causes at least one processor to define a gray region in an image captured by an image sensor through: accessing red, green, or blue values corresponding to a pixel in the image, calculating a luma of the pixel using at least two of the red, blue, or green values corresponding to the pixel, determining that the luma corresponding to the pixel is outside of a predefined range for luma, incident to said determination that the luma corresponding to the pixel is outside of the predefined range of luma, discarding the pixel from being used in auto-white balancing a portion of the image, and determining remaining other pixels in the image are within the gray region from remaining pixels that are auto-white balanced.