1. An apparatus comprising: an image sensor array having a plurality monochrome pixels; wherein the apparatus is configured to capture a gray scale image frame based on an intensity of light detected by at least the plurality of monochrome pixels, and to transfer the gray scale image frame to an indicia decode circuit, wherein the indicia decode circuit is configured to attempt to decode a decodable indicia represented by the gray scale image frame; wherein the image sensor array is configured to obtain the grey scale image frame in a global shutter mode by simultaneously exposing at least the plurality of monochrome pixels in response to a global exposure control timing pulse; and wherein the plurality of monochrome pixels are distributed according to a distribution pattern such that a shape of the gray scale image frame corresponds to a shape of the decodable indicia.