Boris Sluban's research while affiliated with University of Maribor and other places

Publications (17)

Article
Full-text available
One of the main tasks of the international metrology system is to assure comparability of measurement results. It can be achieved through recognized traceability chains, which are linking measurement results to references such as measurement units and their realizations. However, the traceability is most commonly limited to measurement instruments...
Article
Observer metamerism is defined as a property of a pair of spectrally different stimuli having the same colour sensation for an individual (reference) observer. Frequently, samples in this pair no longer match if the observer is changed. In this article, a linear approximation formula is developed that predicts a metameric effect caused by small cha...
Article
Indices for describing the degree of metamerism are based on either the deviation of the spectra of a metameric pair or the colour difference of the pair under test conditions. The magnitude of illuminant metamerism is commonly evaluated by measuring the colour difference under the test illuminant. The calculated colour differences absolutely vary...
Article
The repeatability of the recipe color can be affected by several different types of inevitable inaccuracies in the coloration process. Two of the major causes of poor target-color reproducibility are the (random) weighing and (proportional) strength errors. This article describes alternative definitions of colorant strength sensitivity and total co...
Conference Paper
Full-text available
The repeatability of dyeing is affected by several types of small inevitable inaccuracies in the coloration process. Two of the major causes of poor target color reproducibility are random weighing inaccuracy, as well as proportional strength error. This article describes alternative definitions for colorant strength sensitivity and total colorant...
Article
The essential question of the paper ‘Can the predicted sensitivity to random and/or proportional dye concentration errors assist in selecting the most repeatable recipes?’ was investigated using the laboratory dyeing of acrylic fabric with basic dyes. When the dye strength errors were not involved, the biggest scattering of the recipe colour in rep...
Article
The general concept of predicting the colour sensitivity to random colorant concentration errors and the colour correctability of a colour matching recipe are reviewed and generalised in this paper. The treatment of both quantities is unified either in the concentration space or, equivalently, in colour space. The concept of the recipe's colour bal...
Article
A regularity of the predicted sensitivities to random and proportional dye concentration errors in regard to the position of target colour has been observed for the case of dyeing acrylic with basic dyes. The sensitivity of the recipe colour to random dye concentration errors is highest for light neutral target colours and is almost negligible for...
Article
In this research the effect of the proportional dye concentration errors has been examined with numerical experiments using optical data of basic dyes applied on polyacrylic. A larger set of target colours regularly spaced throughout the colour space has been chosen. For each target colour all available recipes have been treated and their sensitivi...
Conference Paper
The paper describes a variant of multi-illuminant strategy of colour match prediction calculation for the cases of CMC(l:c) and CIE94 colour differences. This strategy tries to minimize the colour differences (against a given standard), under several different illuminants. In case when a given standard, using the usual single-illuminant matching st...
Article
The repeatability of the recipe colour is a very important aim in coloration practice. In the present research the question about the nature of eventual dependence of the repeatability of the recipe colour upon the position of the target colour in colour space has been investigated in laboratory-scale experiments. For 8 target colours and according...
Article
The paper briefly describes a mathematical model of the colorant mixture colour sensitivity to concentration errors and the numerical estimates of the related quantities. Features of the theoretical model are illustrated with the results of a number of numerical experiments in which the optical data of a few basic dyes applied to textile fabric wer...
Article
The colour of a test dyeing/batch is frequently too far from the target colour to be accepted and some correction to the component concentrations in the recipe is needed. Therefore, it would be useful for a colourist, already at the time of match prediction, to have some a priori information about the possibility of correcting the colour of a parti...
Article
The article examines the concepts of the following three quantities: partial colour sensitivity of a recipe to a particular colorant, colour balance of a recipe, and the overall colour sensitivity and the related property of colour robustness of a recipe. the way to calculate numerical estimates of the above quantities is extended from the case of...
Article
The article discusses two types of colour-formulation strategies: the tristimulus colorimetric strategy (ΔX,ΔY,ΔZ) → (0,0,0) and the least-squares curve fitting Σjw2j[ΔR(λj)]2 → min. Then a new matching strategy (ΔED65)2 + (ΔEA)2 + (ΔEWWF)2 → min is stated, which tries to combine the advantages of the first two strategies: more “balanced” colour di...

Citations

... Detailed descriptions and illustration of numerical experiments and their results are provided in the conference paper. 14 We will only summarize the essential observations: ...
... If more data is available, we can get a more accurate result. Simulation and data generation might be a solution, and many studies have applied them in several fields [46,47]. ...
... To avoid the influence of capture conditions, DigiEye system 17 was utilized for image capture. As shown in Figure 3(a), this system is equipped with a Nikon D7000 camera, special pick-up head and standard illumination D65, 18 which has the advantages of small color difference and stable capture condition. After capture, the image was cropped in the size of 1000 pixels  1000 pixels to reduce the parts of edge burr and platen, as shown in Figure 3(b). ...
... With the light source alteration from D 65 to A, the metamerism index could be represented by the color differences of the mismatching sample pairs. Based on the given CIE standard observer, the degree of metamerism index is affected by the sample pairs with different spectrum reflectance, which is affected by sample itself (Shahram and Seyed, 2012). ...
... For their implementation, various calibration objects are used. To evaluate the ILC data, various methods of their data processing are used [25][26][27][28][29][30], and to estimate the measurement uncertainty, the regional guidance EA-04/02 М [31] is additionally used, in addition to the ILAC documents [8,13]. However, in addition to the method of data evaluation, it is necessary to take into account other influencing factors on the CL result of ILC. ...
... 4 Therefore, it is obligatory that any modified equation must also be available in its inverse form. Finally, for color matching systems, the concentration of pigments will be calculated by the aid of equations (3) and (9) (for opaque) or (3) and (10) (for translucent) media by the trial and error method [60][61][62][63][64][65][66][67] or by some sophisticated procedures. 64,68 ...
... 4 Therefore, it is obligatory that any modified equation must also be available in its inverse form. Finally, for color matching systems, the concentration of pigments will be calculated by the aid of equations (3) and (9) (for opaque) or (3) and (10) (for translucent) media by the trial and error method [60][61][62][63][64][65][66][67] or by some sophisticated procedures. 64,68 ...
... 4 Therefore, it is obligatory that any modified equation must also be available in its inverse form. Finally, for color matching systems, the concentration of pigments will be calculated by the aid of equations (3) and (9) (for opaque) or (3) and (10) (for translucent) media by the trial and error method [60][61][62][63][64][65][66][67] or by some sophisticated procedures. 64,68 ...
... 4 Therefore, it is obligatory that any modified equation must also be available in its inverse form. Finally, for color matching systems, the concentration of pigments will be calculated by the aid of equations (3) and (9) (for opaque) or (3) and (10) (for translucent) media by the trial and error method [60][61][62][63][64][65][66][67] or by some sophisticated procedures. 64,68 ...
... where the concentrations need to satisfy the constraint that c i ≥ 0 and n i=1 c i = 1. It is notable that comparisons between these two types of optimization objectives have also been made (Sluban, 2007). To eliminate the metamerism phenomenon and achieve the unconditional match, spectrophotometric matching was adopted in this article. ...