index_303.mat is a boolen array of length 1449. The images corresponding to 1 entries are sampled as the subset.

data_split.mat consists of one 202-entry and one 101-entry array indexing the samples we use for training and testing.

layout_GT.mat is the pixel-wise annotation of room layout, including ceiling, floor, right, front and left wall classes. 

labeling_GT.mat is the pixel-wise segmentation groundtruth of the room, including class ceiling, floor, right, front and left wall, as well as the clutter class.

For the groundtruth, we decode the classes as following:

ceiling    -->   1
floor      -->   2
left wall  -->   3
front wall -->   4
right wall -->   5
clutter    -->   6