1. A method of operation of a text recognition system comprising: receiving a text unit; determining an isolated feature of the text unit; determining boundary points of the text unit; determining angle features of the text unit based on the boundary points; generating a feature vector for the text unit based on the isolated feature and the angle features; and determining recognized text using the feature vector for display on a display interface, wherein determining the angle features includes: selecting three of the boundary points which are adjacent to one another; drawing lines between each of the boundary points and its nearest neighbor; and determining an angle θ between the lines.