I. INTRODUCTION
NON-line-of-sight imaging (NLOS) refers to the reconstruction of texture and geometry of objects hidden by occluding surfaces from both the source and the detector. Over the last decade, several NLOS imaging techniques have been developed that exploit either phase [18], [29], time-of-flight [19], [34], motion [5], known occluders in the hidden volume [31] or just intensity information [20]. Among these, time-of-flight (or transients) based techniques have been the most popular and have resulted in some of the best available results so far.