CONTOUR CORRECTING METHOD, IMAGE PROCESSING DEVICE AND DISPLAY DEVICE

摘要

It is an object to provide a contour correcting method for carrying out correction such as enhancement of contours suitable for characteristics of an input image, an image processing device for carrying out the contour correction by using the method, and a display device for displaying an image subjected to the contour correction. A noise elimination filter (21) eliminates noise from an input image and a contour component extracting unit (23) extracts a contour component. The contour component is extracted by calculating a difference between the input image and a smoothed image that is the input image subjected to smoothing by a smoothing image generating unit (24). A contour component comparing unit (26) compares the extracted contour component with a threshold value and a sum total calculating unit (27) calculates the sum total of the contour components that are equal to the threshold value or more. A control circuit (11) determines the degree of enhancement of the contours in accordance with the sum total and averaged brightness of the input image calculated by an average brightness calculating unit (22). An enhancement degree adjusting unit (28) adjusts the determined degree, and a contour component enhancing unit (30) enhances the contour component in accordance with this enhancement degree and adds it to the input image to carry out contour enhancement processing.