Dataset Information: -- This folder contains 4 groups of USPTO patent images including ground truth information. -- The 4 groups are 'train1', 'train2', 'test', 'evaluation'. -- 'train1', 'test', 'evaluation' contains data in the original 'USPTO Algorithm Challenge' for training, testing and final evaluation, respectively. -- 'train2' contains additional data which was used in the 'USPTO Algorithm Followup Challenge.' Notice that 'train2' includes some cover page images of patent document which is not included in other groups. -- In each group, there are two folders contain original images and corresponding ground truth informations. -- The original images are in 'jpeg' format. -- There are two types of ground truth: figure label ground truth and part label ground truth. -- The ground truth files are text files with '.ans' extension. -- The structure of the ground truth files are described as below: -- The first line is one number indicating how many instances exist in corresponding image -- The following lines are polygon coordinates and corresponding label contents, each line corresponds to a figure label or part label, in the form 'N x1 y1 x2 y2 … xN yN x1 y1 content'. -- In each of those lines, the first number N indicates how many polygon vertices are recorded in current instance. -- The following numbers are x, y coordinates of those vertices. -- The final word in each line is the content of figure label or part label. <Notice for figure labels, the word 'Figure', 'Fig' etc. are omitted> -- Each number or word is separated by a white space. -- For group 'train2', there are only part label ground truth available. -- We also release the source code of the top 5 winning solution. See additional archive file.