Method of removing blur without ringing-artifact

An image processing apparatus for removing blur in a screen image, comprising:

• an image segmentation unit for detecting an amount of blur in an input image, and segmenting the image according to an amount of blur to be removed;
• a high pass filter for filtering each image segment in a horizontal direction and a vertical direction to obtain corresponding coefficients associated with each of the horizontal and vertical directions, and outputting the coefficients associated with each direction;
• a β-calculation unit for calculating a weight β associated with each direction by applying the coefficients to predetermined weight calculation equations;
• and
• an image restoration unit for restoring the corresponding image by applying the calculated β to one of:
• an iterative form and a closed form of image restoration.

An image processing apparatus for removing blur in a screen image, comprising

• a processor in communication with a memory, the memory including code which when accessed by the processor enables the processor to execute the steps of:
• detecting blur in an input image;
• segmenting the image according to an amount of the detected blur;
• performing a high pass filtering for each segmented image in a horizontal direction and a vertical direction to obtain corresponding coefficients associated with each of the horizontal and vertical directions;
• obtaining weights corresponding to each horizontal and vertical direction, wherein the weights are calculated by applying the coefficients to predetermined weight calculation equations;
• and
• restoring the image segment by applying the obtained weights to one of an iterative form and a closed form of an image restoration process.