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公开(公告)号：US20230136460A1
公开(公告)日：2023-05-04
申请号：US17918258
申请日：2021-04-13
发明人： Peter Mark SPIERS , Arjan GIJSENIJ
摘要： The present invention relates to a computer implemented method for determining a predetermined number, k, of representative colours from at least one digital colour image, comprising the steps of: a) obtaining at least one digital colour image having a number, p, of pixels each pixel having a colour value within an n-dimensional colour space; b) defining a predetermined number of K cluster centres which are distributed in a predetermined pattern in the colour space, wherein K>k; c) forming clusters by associating for each pixel its colour value with the nearest of the cluster centres; d) reducing the number of clusters to k by deleting cluster centres and/or merging clusters; e) from each of the resulting k clusters defining a respective representative colour.
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公开(公告)号：US20220301238A1
公开(公告)日：2022-09-22
申请号：US17619057
申请日：2020-06-29
IPC分类号： G06T11/00 , G06T7/90 , G06T7/10 , G06F3/04845
摘要： A computer implemented method and system for generating a visualization of a stained wood substrate are provided. The method includes receiving an image of the wood substrate to be stained; subdividing the image into a plurality of sub-images, each sub-image corresponding to the portion of the image having a color falling in a respective one of color bands; for each sub-image, retrieving a reflectance curve representative for the wood substrate for the color corresponding to the sub-image; retrieving absorption and scattering values for the stain; for each sub-image, determining the reflectance curve representative for the stained wood based on the absorption and scattering values for the stain and the reflectance curve for the wood substrate for that sub-image; and for each pixel of each sub-image, determining a color based on the reflectance curve representative for the stained wood, resulting in a generated image of the substrate after applying the stain.
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