发明名称 |
A METHOD FOR GENERATING GRAY SCALE TRANSFER FUNCTIONS FOR USE IN DISPLAYING A DIGITAL RADIOGRAM |
摘要 |
A method for generating on demand a gray scale transfer curve for use in displaying an image comprised of plurality of digital values representing pixel gray scale levels with a desired contrast and brightness (Fig. 3). This is achieved by using a single sigmoid shaped function Y=f(X,a,b,c) representing an H & D curve of a photographic film. The Y axis represents digital output values to be used in displaying an image (Fig.2), while the X axis represents input digital values representing captured image information (Fig. 2). "a" is a number representing boundary conditions for X and Y, "b" is a first parameter controlling the location of the curve along the X axis and "c" is a second parameter controlling the slope of the curve slope. This function is used to derive a Look-Up-Table (LUT) representing a continuous GST curve having the desired contrast and brightness.
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申请公布号 |
WO0139104(A1) |
申请公布日期 |
2001.05.31 |
申请号 |
WO2000US30938 |
申请日期 |
2000.11.10 |
申请人 |
DIRECT RADIOGRAPHY CORP. |
发明人 |
BELL, JEFFREY, H.;GINGOLD, ERIC, L. |
分类号 |
G06T5/00;G06T5/40;H04N1/407;(IPC1-7):G06K9/00 |
主分类号 |
G06T5/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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