FIGURE 7 The MAP image of ex-vivo colorectal tissues
reconstructed from: (a) raw data, (b) de-noised data by sqtwolog
threshold method, (c) de-noised data by 4-order Butterworth low pass
filter, (d) de-noised data by our proposed de-noising method (gaWD). (e)
the calculated SNR of (a)-(d).
We also plot the 3D volumetric PA image of the ex-vivo colorectal
tissues, after de-noising processing by the above three methods,
respectively. The results are displayed in FIGURE 8 . Same with
the de-noising results in FIGURE 7 , the 3D volumetric PA image
reconstructed by our proposed gaWD method shows cleaner in background,
achieving higher image contrast and more detailed texture.