图像的亮度分辨率 ef g h FIGURE 2.21 displayed in 16.S. 4 and 2 ara levek ( Original courtesy ol Dr, David R Pickes Department of Radiology Radiological vanderbilt Medical Center. Number of intensity levels--usually 8 or 16 bits图像的亮度分辨率 Number of intensity levels -- usually 8 or 16 bits 25