For more details, please refer to arXiv paper. For forward pass for 300x300 model, please, follow SSD.ipynb for examples. For training procedure for 300x300 model, please, follow SSD_training.ipynb for examples. Moreover, in testing_utils folder there is a useful script to test SSD on video or on camera input.
Weights are ported from the original models and are available here. You need weights_SSD300.hdf5, weights_300x300_old.hdf5 is for the old version of architecture with 3x3 convolution for pool6.
This code was tested with Keras v1.2.2, Tensorflow v1.0.0, OpenCV v3.1.0-dev