1. An apparatus comprising: an image sensor configured to capture real time images at a plurality of resolutions from an environment of a user; at least one processor device configured to: capture, at an initial resolution, a plurality of images from the image sensor; access rules associating image context with image capture resolution to enable images of a first context to be captured at a lower capture resolution than images of a second context; analyze at least one first image captured by the image sensor to determine a first image context; select a first image capture resolution rule based on the determined first image context, wherein the first image capture resolution rule defines a first resolution for capturing images in the environment of the user; apply the first image capture resolution rule to at least one subsequent captured image; analyze at least one second image captured by the image sensor to determine a second image context, wherein the second image context relates to text in the environment of the user; select a second image capture resolution rule based on the determined second image context, wherein the second image capture resolution rule defines a second resolution for capturing images in the environment of the user that include the text; and apply the second image capture resolution rule to at least one second subsequent captured image, wherein the second resolution is greater than the first resolution.