Faceboxes: A CPU real-time and accurate unconstrained face detector.

•We design the Rapidly Digested Convolution Layers (RDCL) to enable face detection to achieve CPU real-time speed.•We introduce the Multiple Scale Convolution Layers (MSCL) to handle various scales of face via enriching features and discretizing anchors over layers.•We propose a new anchor densification strategy to improve the recall rate of small faces.•We present a Divide and Conquer Head (DCH) to boost the prediction ability of the detection layer.•We achieve state-of-the-art performance on the AFW, PASCAL face, FDDB and WIDER FACE datasets among CPU real-time methods.