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Method of correcting threshold array, dot pattern data structure, method of correcting pixel layout of image, and method of determining threshold array for generating image
Method of correcting threshold array, dot pattern data structure, method of correcting pixel layout of image, and method of determining threshold array for generating image
A threshold array having an array of thresholds for reproducing a gradation with a dot pattern as a clustered pattern of dots each made up of one or more blackening pixels is corrected. At least one non-contact point candidate position to be turned into a non-contact point is determined among contact points of the dots. Then, at least one contact point candidate position to be turned into a contact point is determined among non-contact points of the dots at the given gradation. Thereafter, the threshold array is corrected by switching around a threshold for the non-contact point candidate position and a threshold for the contact point candidate position, whereby the layout of contact points of the dots can be corrected.
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