DIGITAL IMAGE PROCESSING METHOD AND IMAGING APPARATUS

摘要

In a digital image processing, a weighting function having a pixel-to-pixel distance as a variable and a weighting function having a pixel-value difference of a neighboring pixel as a variable are each set (Step S4) for filtering with a bilateral filter. At this time, the weighting function applying weight depending on edge strength of a CT image (pixel-value difference between an adjacent pixel and a target pixel) is set using the CT image as another digital image without a PET image to be processed. As noted above, a filter coefficient is determined also with the CT image as the other digital image (Step S6). Then filtering is performed to the PET image as a digital image with the determined filter coefficient (Step S7). Consequently, filtering is obtainable with no influence of a noise level of the PET image, achieving maintenance of a space resolution and noise reduction.

主权项

1. A digital image processing method for determining a filter coefficient in accordance with information on a pixel-to-pixel distance and information on a pixel-value difference between a target pixel to be processed and a neighboring pixel around the target pixel, and processing a digital image with the determined filter coefficient, the method comprising:
when a digital image to be processed is denoted by A and another digital image B of the same object as the digital image A is denoted by B, determining the filter coefficient to process the digital image A also with information on the other digital image B.