US 11,995,808 B2
Method for X-ray dental image enhancement
Roumen Kountchev, Sofia (BG); Michael McGuire, Prior Lake, MN (US); and Peter Vladimirov, Medina, MN (US)
Assigned to Abova, Inc, Minneapolis, MN (US)
Filed by Abova, Inc., Minneapolis, MN (US)
Filed on Sep. 3, 2021, as Appl. No. 17/446,942.
Claims priority of provisional application 63/202,997, filed on Jul. 2, 2021.
Claims priority of provisional application 63/200,131, filed on Feb. 16, 2021.
Claims priority of provisional application 62/706,727, filed on Sep. 4, 2020.
Prior Publication US 2022/0076392 A1, Mar. 10, 2022
Int. Cl. A61B 6/14 (2006.01); A61B 6/51 (2024.01); G06T 5/20 (2006.01); G06T 5/40 (2006.01); G06T 5/75 (2024.01); G06T 5/92 (2024.01); G06T 7/00 (2017.01); G06T 7/136 (2017.01)
CPC G06T 5/92 (2024.01) [A61B 6/51 (2024.01); G06T 5/20 (2013.01); G06T 5/40 (2013.01); G06T 5/75 (2024.01); G06T 7/0012 (2013.01); G06T 7/136 (2017.01); G06T 2207/10116 (2013.01); G06T 2207/30036 (2013.01)] 22 Claims
OG exemplary drawing
 
1. A method, comprising:
applying noise filtration to an input X-ray dental image, including using Recursive Locally-Adaptive Wiener Filtration (RLA-WF) based on a sliding window calculated following a 2-dimensional (2D) recursive scheme to obtain a noise filtrated image;
applying contrast enhancement to the input X-ray dental image, including using Recursive Sliding Window Contrast Limited Adaptive Histogram Equalization (RSW-CLAHE) utilizing a Truncation Threshold Surface (TTS), and the sliding window to obtain a contrast enhanced image;
applying sharpness enhancement to the input X-ray dental image, including using Fast Recursive Adaptive Unsharp Masking (FRA-UM) utilizing the sliding window to obtain a sharpened image by a 2-dimensional (2D) recursive scheme or a 1-dimensional (1D) recursive scheme, the 1D recursive scheme based on double scanning of the X-ray dental image; and
linearly mixing the noise filtrated image and the contrast enhanced image with the sharpened image using a control coefficient to produce an output X-ray dental image.