Patent ID: 9418323
Filing Date: 2016-08-16
CPC Classification: B05D,B41M,G06K,H04N

Claim Text:
1. A method for combining two source images in a relief image with structural elements placed on a flat substrate and having at least two principle surface orientations, such that a first image is observed in a first viewing direction and a second image is observed in a second viewing direction, the method reducing a ghosting effect and comprising the steps of: a) printing a test relief image comprising patches with structural elements having a first basic color on a surface with a first principle orientation and a second basic color on a surface with a second principle orientation, a basic color being a color having a predefined amount of colorant; b) measuring for each patch a first observed color in a first viewing direction and a second observed color in a second viewing direction; c) scaling a first source image and a second source image such that each image element has a size corresponding to a structural element in the relief image; d) selecting for each position in the relief image a structural element from one patch out of said patches in the test relief image, wherein said one patch is selected in such a manner that a sum of a color difference between an image element of the scaled first source image and a first observed color of said one patch and a color difference between an image element of the scaled second source image and a second observed color of said one patch is the smallest compared to the rest of said patches; and e) composing a relief image from the selected structural elements.