In Dependent Color Halftoning, Yellow Matters

Gooran, Sasan

doi:10.2352/j.imagingsci.technol.(2006)50:5(448)

Cited by 5 publications

(18 citation statements)

References 4 publications

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“…IMCDP reproduces most of the gray tones quite well, but in highlight and shadow regions, i.e. in regions with gray tones lighter than 0.04 and darker than 0.96, the dots are not distributed as homogeneously as expected [3,10]. The reason is that the 11×11 filter is not big enough for these regions.…”

Section: D Imcdpmentioning

confidence: 94%

“…Iterative Method Controlling Dot Placement (IMCDP) halftoning was presented in [3]. In this method, the halftoning problem is defined as placing a predetermined number of dots in a blank image the same size as the original.…”

Section: D Imcdpmentioning

confidence: 99%

“…Experiments in [3] showed that a Gaussian filter with a standard deviation of 1.3 truncated to 11×11 pixels leads to desired halftone results in most cases. Applying the filter to the 11×11 neighboring pixels, centered at the pixel holding the maximum value, decreases the values of the neighborhood based on the distance from the center, hence reducing the probability of finding the next maximum in this area.…”

Section: D Imcdpmentioning

confidence: 99%

“…While thresholding and the original error diffusion suffer from low halftone quality and several artifacts, the third category of halftoning methods, iterative halftoning, obtain the highest quality at the cost of computational complexity. Direct Binary Search (DBS) [2] and Iterative Method Controlling Dot Placement (IMCDP) [3] fall into this category.…”

Section: Introductionmentioning

confidence: 99%

“…The 2D IMCDP halftoning method is a color channel dependent halftoning method which has been proved not only to produce higher quality halftones, but also to reduce the amount of ink needed to reproduce colors [3]. Later, the authors used predetermined and image-independent threshold matrices to increase the IMCDP speed by making it a point-by-point halftoning process [10].…”

Section: Introductionmentioning

confidence: 99%

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3D Halftoning based on Iterative Method Controlling Dot Placement

Abedini¹,

Gooran²,

Nyström³

2020

print4fab

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Realistic appearance reproduction is of great importance in 3D printing's applications. Halftoning as a necessary process in printing has a great impact on creating visually pleasant appearance. In this article, we study the aspects of adapting and applying Iterative Method Controlling Dot Placement (IMCDP) to halftone three-dimensional surfaces. Our main goal is to extend the 2D algorithm to a 3D halftoning approach with minor modifications. The results show high-quality reproduction for all gray tones. The 3D halftoning algorithm is not only free of undesirable artifacts, it also produces fully symmetric and wellformed halftone structures even in highlight and shadow regions.

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Section: D Imcdpmentioning

confidence: 94%

Section: D Imcdpmentioning

confidence: 99%

Section: D Imcdpmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

3D Halftoning based on Iterative Method Controlling Dot Placement

Abedini¹,

Gooran²,

Nyström³

2020

print4fab

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Effect of halftones on printing iridescent colors

Abedini¹,

Trujillo-Vazquez²,

Gooran³

et al. 2023

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The iridescent effect produced by structural color is difficult (if not impossible) to capture and print using traditional CMYK pigments. The so called RGB reflective pigments, nonetheless, generate angle-dependent colors by light interference. A layered surface structure generated by the pigments' particles on a substrate reflects light waves of different wavelengths at different viewing angles according to the optical principle known as the Bragg Law. In this work, we have studied the influence of different halftone structures on printed images, produced with RGB reflective inks via screen printing. The main goal was to enhance the iridescence of a printed reproduction by studying the performance of different halftone algorithms on a screen printing process. We investigated the influence of different halftone structures in creating different spatial combinations of inks on a print to reproduce the image of an iridescent feathered headdress. We applied first-order, second-order, and structure-aware FM halftones to compare how they influence the reproduction of the material appearance of the object represented in the original image. The results show that the structure-ware halftones improve the representation of the image structures and details. Therefore, it could better convey the 3D surface features that produce iridescence in real feathers.

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3D Surface Structures and 3D Halftoning

Gooran¹,

Abedini²

2020

print4fab

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As 3D printing is becoming increasingly popular, the demand for high quality surface reproduction is also increasing. Like in 2D printing, halftoning plays an important role in the quality of the surface reproduction. Developing advanced 3D halftoning methods for 3D printing and adapting them to the structure of the surface is therefore essential for improving surface reproduction quality. In this paper, an extension of an iterative 2D halftoning method to 3D is used to apply different halftone structures on 3D surfaces. The results show that using different halftones based on the 3D geometrical structure of the surface and/or the viewing angle in combination with the structure of the texture being mapped on the surface can potentially improve the quality of the appearance of 3D surfaces.

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In Dependent Color Halftoning, Yellow Matters

Cited by 5 publications

References 4 publications

3D Halftoning based on Iterative Method Controlling Dot Placement

3D Halftoning based on Iterative Method Controlling Dot Placement

Effect of halftones on printing iridescent colors

3D Surface Structures and 3D Halftoning

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