Three-dimensional halftoning by selecting submatrix of halftone matrix to halftone each slice or layer of object
First Claim
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1. A three-dimensional halftoning method, comprising:
- providing a halftone matrix including values;
subdividing the halftone matrix into a plurality of sub-matrices, each sub-matrix including values of the halftone matrix in a respective sub-range;
selecting, for a current slice of a three-dimensional representation of an object, a sub-matrix of the plurality of sub-matrices of the halftone matrix;
halftoning the current slice using the selected sub-matrix; and
depositing material on a layer of the object according to said halftoning of the corresponding slice.
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Abstract
A three-dimensional halftoning method is disclosed, wherein a halftone matrix including values is provided and subdivided into a plurality of sub-matrices, each sub-matrix including values of the halftone matrix in a respective sub-range. For a current slice of a three-dimensional representation of an object, a sub-matrix of the plurality of sub-matrices of the halftone matrix is selected and halftoning of the current slice is performed using the selected sub-matrix. Furthermore, an additive manufacturing method and system are described.
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Citations
14 Claims
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1. A three-dimensional halftoning method, comprising:
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providing a halftone matrix including values; subdividing the halftone matrix into a plurality of sub-matrices, each sub-matrix including values of the halftone matrix in a respective sub-range; selecting, for a current slice of a three-dimensional representation of an object, a sub-matrix of the plurality of sub-matrices of the halftone matrix; halftoning the current slice using the selected sub-matrix; and depositing material on a layer of the object according to said halftoning of the corresponding slice. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. An additive manufacturing method for producing an object from a digital representation of the object, said method comprising:
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determining area coverage vectors for each pixel on each slice of the digital representation of the object; subdividing a two-dimensional halftone matrix including threshold values into a plurality of sequentially arranged sub-matrices, each sub-matrix including threshold values of the halftone matrix in a respective sub-range; for each layer of a sequential manufacturing sequence; determining a slice of the digital representation of the object corresponding to the layer; selecting a sub-matrix of the plurality of sequentially arranged sub-matrices based on a number of the slice modulo a total number of the sequentially arranged sub-matrices, halftoning the area coverage vectors for the slice using respective threshold values of the selected sub-matrix, and depositing material or fluid on the layer according to results of said halftoning of the area coverage vectors for the slice. - View Dependent Claims (11, 12)
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13. An additive manufacturing system, comprising:
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a print head to deposit successive layers of material or fluid; and a processor operatively coupled to the print head so as to control deposition of the successive layers of material or fluid, wherein, for an object to be manufactured, the processor is to; provide a halftone matrix including values, subdivide the halftone matrix into a plurality of sub-matrices, each sub-matrix including values of the halftone matrix in a respective sub-range, select, for a current layer to be manufactured, a sub-matrix of the plurality of sub-matrices of the halftone matrix, and halftone a representation of the object for the current layer using the selected sub-matrix, wherein the processor is to control deposition of material or fluid for the current layer according to results of the halftoning. - View Dependent Claims (14)
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Specification