Corel Corporation

Jasc Software, Inc.

Olga Vadimovna Sharonova

Mikhail Ivanovich Trifonov

Kryzstof Antoni Zaklika

A boundary in an image is identified by identifying a search region within the image. The process continues by determining image gradients in the search region and determining multiple color regions within the search region. An active contour representing the boundary is created based on the image gradients and the multiple color regions.

Method and apparatus for selecting an object in an image

A method of automatic contrast correction comprises providing digital image data, representing the data in the form of a brightness histogram, determining a measure of central tendency for said histogram, adding a shift value to the measure of central tendency to provide an adjusted measure of central tendency, using the both the determined and adjusted measures of central tendency to determine the exponent of a tone reproduction curve, and applying the tone reproduction curve to the brightness values of the image. Additionally, the method may provide further correction by applying to the brightness values of the image an S-shaped tone reproduction curve that does not change a measure of central tendency of the brightness histogram.

Automatic contrast enhancement

Line defects are removed from an image by providing image data in digital form, analyzing segments of the image data as groups of pixels, detecting line defects in the image by application of a line detector, such as a local radial angular transform, and adjusting the image data to correct the detected line defects within the determined limits.

Assisted scratch removal

A computer with a monitor viewable program executes to display a histogram of image data on the monitor. The monitor contemporaneously displays a screen image viewed on a monitor of the histogram, and displays a digital or analog control element that controls both compression and expansion of midtones. Activation of the midtone compression/expansion element alters the displayed image according to effects of programs underlying the control of the element. This histogram display and element are associated on a single logical screen display in which at least one other image data modification effect is present on the screen image as an addressable image data modification effect.

Growing community of inventors

Saint Petersburg, Russia

Olga Vadimovna Sharonova