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. 2021 Sep 5;7(9):178. doi: 10.3390/jimaging7090178

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© 2021 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).

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Two retrieved DPC images (DPC 1 and DPC 31, RTA) and transmission images (T 1 and T 31, ATR) for a visual comparison of the improved image quality. For the DPC image comparison, an image retrieved using reference image 5 is shown on the left (DPC 1) and on the right an image retrieved using all reference images and the RTA method (DPC 31, RTA). It can be seen with the naked eye that the noise is reduced and hence, the double wedges are easier to recognize. For the comparison of the transmission image, the image retrieved with reference image 5 (T 1) is again compared with the image retrieved using the ATR method and reference image combination 31 (T 31, ATR). Here, hardly any improvements are visible. The lower STD of the right image can vaguely be seen in the free field.