1. A method for identifying parameters for pixels to be printed by an inkjet printer comprising: mapping a plurality of continuous tone data values for a pixel in an image to a corresponding output level; identifying a score for each of one or more color combinations for the pixel in the image from the mapped output levels; identifying a pixel total color from the scores; comparing the pixel total color to a threshold in a single stochastic screen of thresholds that corresponds to the pixel in the image; modifying the pixel total color and comparing the modified pixel total color to the threshold in response to the pixel total color being less than the threshold; continuing to modify the modified pixel total color in response to the modified pixel total color being less than the threshold; identifying a last added color combination in response to one of the pixel total color and the modified pixel total color being greater than the threshold; selecting a primary color in the last added color combination; mapping the mapped output level for the selected primary color to a print output level; adding the scores for each color combination in the pixel total color or modified pixel total color that exceeded the threshold that does not contain the selected primary color to identify a pixel subtotal color; adding the pixel subtotal color to the print output level for the selected primary color to form a sum; comparing the sum to the threshold in the single stochastic screen; assigning a parameter value to a parameter for the pixel with reference to the comparison of the sum to the threshold in the single stochastic screen; and operating at least one inkjet in a printhead with reference to the assigned parameter value for the pixel to form a pixel in an output image that corresponds to the pixel.