1. A method for identifying lawn grass comprising: capturing an image of terrain in front of a mower; segmenting said image into neighborhoods; calculating values for at least two image statistics for each of said neighborhoods; comparing said image statistic values of said neighborhoods to predetermined image statistic values for grass; generating a binary representation of each image statistic value, wherein a neighborhood for an image statistic value is marked as grass containing when said image statistic value of said neighborhood compares favorably to a predetermined image statistic value for grass; weighting each of said binary representations of each image statistic; summing corresponding neighborhoods for all image statistics; and applying a binary threshold to each of said summed neighborhoods, wherein said binary threshold produces a binary map representing grass containing areas and non-grass containing areas.