1. A method for detecting a junction in a received image of a line of text to update a junction list with descriptive data, the method comprising: creating a color histogram based on a number of color pixels in the received image of the line of text; detecting, based at least in part on the received image of the line of text, a rung within the received image of the line of text; identifying a horizontal position of the detected rung in the received image of the line of text; additionally identifying a gateway on the color histogram, wherein the identified gateway is associated with the detected rung; and updating the junction list with data including a description of the identified gateway.