1
Hsien Che Lee, Martin C Kaplan, Robert M Goodwin: Interactive dynamic range adjustment system for printing digital images. Eastman Kodak Company, Edward Dugas, April 30, 1991: US05012333 (158 worldwide citation)

An interactive dynamic range adjustment method for printing digital images, and an implementation system, are disclosed. The method is based on experimental findings about visual photoreceptor adaption and human visual contrast sensitivity. The system adjusts the contrast of the low-frequency compon ...


2
Hsien Che Lee: Automatic tone adjustment by contrast gain-control on edges. Eastman Kodak Company, Peyton C Watkins, September 4, 2001: US06285798 (115 worldwide citation)

A method of reducing the dynamic range of an input image for effectively rendering the input image on an output display medium, the method comprises the steps of extracting detail signals and coarse signals from the input image; generating contrast gain-control signals from the input image by detect ...


3
Susan S Young, Hsien Che Lee: Method for automatically locating an image pattern in digital images using eigenvector analysis. Eastman Kodak Company, William F Noval, September 23, 2003: US06625303 (74 worldwide citation)

A method for automatically locating instances of a specified image structure in digital images, comprising the steps of: providing a digital image; detecting simple features associated with the specified image structure in the digital image; for each detected feature, searching, in its spatial neigh ...


4
Hsien Che Lee: Method for determining the color of a scene illuminant from a color image. Eastman Kodak Company, Thomas H Close, August 4, 1987: US04685071 (63 worldwide citation)

A method of determining the color of light employed to illuminate the scene in a color image from the image itself, relies upon detecting the color of the specularly reflected light in the image. In a preferred mode of practicing the invention, the color of specularly reflected light is detected by ...


5
Gina N LaRossa, Hsien Che Lee: Digital image processing method for edge shaping. Eastman Kodak Company, David M Woods, August 26, 2003: US06611627 (59 worldwide citation)

A digital image processing method, includes the steps of: transforming the digital image using an edge sensitive wavelet transform to produce a plurality of wavelet coefficients at various resolutions and a residual image; modifying the wavelet coefficients as a function of the image gradient and it ...


6
Scott J Daly, Hsien Che Lee: Visual characterization using display model. Eastman Kodak Company, Thomas H Close, May 19, 1998: US05754222 (52 worldwide citation)

A method for detecting the characteristics of a display, comprises the steps of: creating a model of the display having multiple parameters relating the physical output of the display to an input signal creating the display; employing a model of the human visual system, generating a set of control s ...


7
Hsien Che Lee, Lori L Barski, Robert A Senn: Automatic tone scale adjustment using image activity measures. Eastman Kodak Company, William F Noval, May 27, 1997: US05633511 (45 worldwide citation)

A method of automatically adjusting the tone scale adjustment for digital radiographic images. The method includes the steps of providing an input digital radiographic image; estimating the image noise as a function of code value of the image; determining the range of code values in the input image; ...


8
Hsien Che Lee, Heemin Kwon: Method for estimating and adjusting digital image contrast. Eastman Kodak Company, Peyton C Watkins, October 13, 1998: US05822453 (44 worldwide citation)

A method of estimating the scene contrast from a digital image, the method comprises the steps of: forming a Laplacian histogram distribution; determining, from the Laplacian histogram, first and second thresholds which eliminate substantially uniform areas or a substantially textured portion of the ...


9
Hsien Che Lee: Method for displaying a high quality digital color image on a limited color display. Eastman Kodak Company, Edward Dugas, May 23, 1995: US05418895 (32 worldwide citation)

Instead of trying to minimize some cost function of color errors, the present invention exploits physical models of scene-image relations. An image is first segmented into regions corresponding to objects in the physical world. Each object is then painted with a few levels of shades of the same chro ...


10
Hsien Che Lee, Hui Jung Lee, Heemin Kwon, Jeanine Liang: Digital image noise suppression method using SVD block transform. Eastman Kodak Company, Thomas H Close, April 23, 1991: US05010504 (28 worldwide citation)

A block transform image processing method employs singular value decomposition to reduce noise without affecting texture and edge detail. A nonlinear gain function based on the measured statistics of the singular values for image noise is generated. The image is filtered to produce a detail image an ...