Method and device for regulating image tone and graphical user interface used in it

Abstract

An apparatus and method thereof adjust tonal characteristics of an image to a printer. The apparatus includes a storage unit storing a color correction scheme using a color gamma curve varying in accordance with variable values comprising locations of first and second internal points on the color gamma curve and a gamma coefficient, and a variable input unit receiving the variable values. The apparatus further includes a tone adjusting unit adjusting the tonal characteristics of the image by reflecting the variable values in the color correction scheme and generating bitmap data as a result of the adjustment of the tonal characteristics, and outputting the bitmap data to the printer.

Description

[0001] This application claims the benefit of Korean Patent Application No. 2002-37867 filed at the Korean Intellectual Property Office on July 2, 2002, the entire disclosure of which is incorporated herein by reference. technical field [0002] The present invention relates to a method and device for adjusting the tone characteristics of a color or gray scale image (gray scale image) and a graphical user interface used therefor, and more particularly to a user-friendly and simple method that can use a minimum number of Method and apparatus for variable adjustment of the tonal characteristics of a color or grayscale raw image and a graphical user interface therefor. Background technique [0003] Generally, when a color or grayscale original image is input from an input device such as a scanner or a multifunction peripheral, before printing the original image with an output device such as a printer or a multifunction peripheral, the user converts the original image to The chr...

AI Technical Summary

Problems solved by technology

[0006] Typically, however, the graphical user interfaces provided by conventional graphics programs include many variables needed to change the shape of the color gamma curve, and the shape of the color gamma curve is too sensitive to the manipulation of the pointing device for expert users and uninitiated users. Experienced users have difficulty changing the color gamma curve with pointing devices

In addition, in the conventional method of adjusting the color or gray scale of an image, since an additional graphics program is required to adjust the chromaticity or hue characteristics of the graphics, frequent adjustment of the chromaticity or hue characteristics makes the user inconvenient, and it is difficult to quickly To adjust chroma characteristics or tone characteristics

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