Fig. 1. Schematic of the multi-sampling procedure.

Fig. 2. Schematic diagram of the experiment system.

Fig. 3. Human hair phantom reconstruction: (a) Model of the phantom. (b) PA image with single sample frame. (c) PA image with traditional multi-sample-based method. (d) PA image with our multi-sample-based method.

Fig. 4. Images of human index finger joint: (a) PA image using one sample frame. (b) PA image using simple multi-frames average method. (c) PA image using our proposed multi-frame-based method. (d) B-mode ultrasound image; BO, bone; IN, inner structure of tendon; JO, joint; PE, periosteum; TE, tendon.

Table 1. PSNR Improved with Multi-Sample-Based Approach

Table 2. PSNR Comparison between Different Approaches