Title:
ADAPTIVE WINDOW WIDTH AND WINDOW CENTER POSITION ADJUSTMENT METHOD, APPARATUS, COMPUTER SYSTEM, AND STORAGE MEDIUM
Document Type and Number:
WIPO Patent Application WO/2021/115356
Kind Code:
A1
Abstract:
A gradient backpropagation-based adaptive window width and window center adjustment method, an apparatus, a computer system, and a storage medium, comprising: extracting grayscale values of each pixel in an image to be adjusted and aggregating to obtain an input feature vector (S1); by means of a differentiable truncation model, calculating a truncation adjustment coefficient for each grayscale value in the input feature vector, and aggregating to form a truncation adjustment vector, and on the basis of the truncation adjustment vector, adjusting the input feature vector to generate an output feature vector (S2); and sending the output feature vector to a preset neural network, the neural network performing weight updating on the differentiable truncation model on the basis of the output feature vector so as to cause the model to generate an output feature vector that satisfies a loss function of the neural network, and on the basis of said output feature vector, generating a window width/window center image (S3). The obtained window width/window center image both satisfies the requirements of a user for adjustment of window widths and window centers, and satisfies the requirements of a neural network for processing or classifying window widths and window centers.
Inventors:
XU SHANGLIANG (CN)
ZHANG RUIMING (CN)
ZHANG RUIMING (CN)
Application Number:
PCT/CN2020/135076
Publication Date:
June 17, 2021
Filing Date:
December 10, 2020
Export Citation:
Assignee:
PING AN TECH SHENZHEN CO LTD (CN)
International Classes:
G06T11/00
Foreign References:
| CN111696164A | 2020-09-22 | |||
| CN109273074A | 2019-01-25 | |||
| CN102855617A | 2013-01-02 | |||
| CN103310227A | 2013-09-18 | |||
| US20180165551A1 | 2018-06-14 | |||
| US6175643B1 | 2001-01-16 |
Other References:
LEI LV, XUN-JIE ZHAO: "Auto-window Algorithm for 16-bit Grayscale Image", ELECTRO-OPTIC TECHNOLOGY APPLICATION, vol. 31, no. 4, 1 August 2016 (2016-08-01), pages 27 - 30+45, XP055821118
Attorney, Agent or Firm:
SCIHEAD IP LAW FIRM (CN)
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