Abstract:
This specification describes various embodiments that relate to methods for providing a wideband colorimeter that can include more accurate outputs. In one embodiment, a narrowband instrument, such as a spectrometer or spectrograph, can be used for calibration of a wideband colorimeter, so that more accurate outputs can be provided. In one embodiment, an optical test equipment, which consists of both a wideband colorimeter and a narrowband spectrograph, can be used for providing a more accurately calibrated wideband colorimeter. As an example, a spectra-camera, which is a hybrid system consisting of both a wideband colorimeter and a narrowband spectrograph, can be used for simultaneous testing by both the wideband colorimeter and the narrowband spectrograph. By doing simultaneous testing, accurate calibration of the wideband colorimeter can be achieved. This specification further describes a mathematical model to characterize a wideband three channel colorimeter with a narrowband multiple channel spectrometer.
Abstract:
La présente invention se rapporte à un d'étalonnage d'un dispositif (10) comportant un écran émissif (11) et un capteur (12) électronique d'images en couleur (tri stimulus), ledit capteur (12) électronique d'images comportant une lentille autofocus, caractérisé en ce qu'il comporte les étapes suivantes : a) mesure de la surexposition dudit capteur électronique d'images relativement à la puissance lumineuse de l'écran; b) mesure du seuil de détection dudit capteur électronique d'images; c) calibration des fonctions gammas R/V/B dudit capteur électronique d'images; d) calibration de la fonction gamma du rétroéclairage de l'écran; e) calibration des fonctions gammas R/V/B de l'écran; f) calcul d'une matrice de transfert colorimétrique dudit capteur électronique d'images des C CEI R/V/B linéaire∈ [0;1] vers des coordonnées CIE XYZ; g) calcul des spectres des trois primaires de l'écran rouge E(λ) R MAX , vert Ε(λ) V MAX et bleu Ε(λ) Β ΜΑΧ ; h) calcul d'ajustement entre la matrice de transfert colorimétrique de dudit capteur électronique d'images [M CEI ] et les spectres des trois primaires de l'écran rouge E(λ) R MAX , vert Ε(λ) V MAX et bleu Ε(λ) Β ΜΑΧ ; i) détermination de deux fonctions de transfert permettant de passer de la dioptrie d de ladite lentille autofocus à la mesure de distances dans le plan focal image, et à la distance entre le foyer de ladite lentille autofocus et le plan focal image; et j) détermination de l'écartement entre le foyer de la lentille et le bord de l'écran.
Abstract translation:本发明涉及包括发射显示器(11)和电子彩色图像(三刺激)传感器(12)的装置(10)的校准,所述电子图像传感器(12)包括自动对焦透镜,其特征在于: 它包括以下步骤:a)测量所述电子图像传感器相对于显示器的光输出的过度曝光; b)测量所述电子图像传感器的检测阈值; c)校准所述电子图像传感器的R / G / B伽马函数; d)校准显示器的背光的伽马功能; e)校准显示器的R / G / B伽马功能; f)从线性CCEI R / G / B E [0; 1]到CIE XYZ坐标计算所述电子图像传感器的比色转移矩阵; g)计算显示器的三个原色的光谱,红色E(λ)R MAX,绿色Epsilon(λ)V MAX和蓝色Epsilon(λ)Beta MuAlphaChi; h)计算所述电子图像传感器[MCEI]的比色转移矩阵与显示器的三个基色的光谱之间的调整,红色E(λ)R MAX,绿色Epsilon(λ)V MAX和蓝色Epsilon(λ) Beta MuAlphaChi; i)确定使得可以从所述自动对焦镜头的屈光度d切换到图像焦平面中的测量距离以及所述自动对焦透镜的焦点与图像焦平面之间的距离的两个传递函数; 以及j)确定透镜的焦点与显示器的边缘之间的距离。
Abstract:
A method for determining a paint formulation includes: obtaining target color information for a target color, identifying a plurality of toners and corresponding concentrations of the toners in a paint formula that can be used to produce a paint having a color that is similar to the target color, and modifying the paint formula by removing one of the identified toners having a lowest concentration to produce a modified paint formula that can be used to produce a paint having a color that is similar to the target color, and determining if the modified paint formula meets user specified acceptance criteria. An apparatus that can be used to perform the method is also described.
Abstract:
The present disclosure is directed to a system for displaying and designing one or more colors on digital display devices, non-digital display media, or a combination thereof. The system can comprise one or more comparative colors, background colors, or a combination thereof for improved color visual comparison. The system can be used for comparing and selecting colors, such as for use in fashion color designs, automotive color designs, architecture color designs, appliance color designs, or a combination thereof. This disclosure is further directed to a kit and a method for displaying and producing one or more colors.
Abstract:
Le dispositif comprend un appareil de capture d'image, un appareil d'éclairage et les programmes d'ordinateur alimentant une base de données. Le procédé comprend 9 étapes : 1) agencement du dispositif dépendant du type d'application. 2) réalisation prise de vue fond blanc. 3) réalisation prise de vue charte de couleurs connues 4) réalisation algorithme RGB vers L*a*b* 5) segmentation en voxels espace RGB dans L*a*b*. 6) RGB de l'image d'un objet convertis en L*a*b* 7) segmentation image par voxels. L'addition des plages sur l'image desdits voxels couvre la totalité de sa surface, chaque voxel est caractérisé par une couleur moyenne L*a*b*. 8) Enregistrement contrôles images et écarts de teinte ΔΕ calculés entre les couleurs des voxels sur l'objet contractuel et leurs homologues sur échantillon 9) Retour à l'étape 6
Abstract translation:该装置包括图像捕获装置,照明装置和提供数据库的计算机程序。 该方法包括9个步骤:1)根据应用的类型安排设备。 2)拍照,白色背景。 3)拍照,已知色彩图4)将L * a * b * 5的算法实现为L * a * b * 5)分割为L * a * b *中RGB空间的体素。 6)转换为L * a * b * 7的对象的图像的RGB)图像的体素分割。 将所述体素的范围添加到图像中覆盖其相同的整个表面,每个体素的特征在于平均L * a * b *颜色。 8)图像控制的记录和色差的偏差DeltaEpsilon在合同对象上的体素颜色与样本中的对应物的颜色之间计算9)返回到步骤6
Abstract:
Preferably, seven classes of observers are defined, according to different sets of Colour Matching Functions. By displaying specific colour patches of a classification chart using colour display devices having different sets of primaries, and by asking an actual observer to compare his perception of the same colour as displayed on each colour display device, the method allows assigning said observer his specific class. It is proposed a specific apparatus to implement this method.
Abstract:
The invention relates to a method and a device for screen calibration for the true-to-original reproduction of surface colors, the spectral reflection distribution of which is known, wherein by setting parameters the screen can be influenced using software and an electronic controller in each partial region of the screen. The invention is characterized in that an observer adapts the reproduced color impression of the screen to the color impression of an original in each partial region of the screen, wherein the original is compared to the screen colors immediately thereafter on the screen surface and the screen parameters are varied until the color impressions of the original and of the screen appear identical to the observer on the respectively viewed partial screen, viewed from a predefined observer angle, and the settings performed are stored in a screen profile.
Abstract:
The present invention relates to a method for minimizing the effects of metamerism between a set of color standards (e.g., nitrocellulose lacquers) and inkjet printed color merchandise (e.g., paint chips) under a plurality of illuminants, including a balanced illuminant that emulates lighting conditions between cool (6500 K) and warm (2856 K) color temperatures. For each color standard, one selects an ink combination that best produces color merchandise having a minimal degree of metamerism. Innovatively, a combination of instrumental and visual tests is used to evaluate color difference for a set of color standards-color merchandise pairs under a plurality of illuminants. If a color standard-color merchandise pair fails either test then the ink combination may be adjusted.
Abstract:
The present invention relates to a method for minimizing the effects of metamerism between a set of color standards (e.g., nitrocellulose lacquers) and inkjet printed color merchandise (e.g., paint chips) under a plurality of illuminants, including a balanced illuminant that emulates lighting conditions between cool (6500 K) and warm (2856 K) color temperatures. For each color standard, one selects an ink combination that best produces color merchandise having a minimal degree of metamerism. Innovatively, a combination of instrumental and visual tests is used to evaluate color difference for a set of color standards-color merchandise pairs under a plurality of illuminants. If a color standard-color merchandise pair fails either test then the ink combination may be adjusted.