PDF Preflight includes some color condition detection and correction parameters that are not available in the ColorConvert section of the refine process template. Process & RGB A non press color is used Determines whether the PDF file contains specific colors in the text, line art, and in pixel images that use one or more of the following color models:
Pattern or indexed color is used Determines whether the PDF file contains an indexed color space. Select Pattern or indexed color is used to select colors from a color map or color table in another color space. An indexed color space can considerably reduce the amount of data required to represent a sampled image. Shading is used Determines whether pattern shading is used in the PDF file Ink coverage is lower than Determines whether there is enough ink coverage in the PDF file to register on the plate. The default is 4%. You cannot type a value less than 0 or greater than 3200. Ink coverage is higher than Determines whether the PDF file contains too many combined inks to produce a given color. You cannot type a value less than 0 or greater than 3200. RGB Black or CMYK Black is used Determines whether the PDF file contains any black that is mixed from RGB or CMYK. RGB Gray or CMYK Gray is used Determines whether the PDF file contains any gray that is mixed from RGB or CMYK. Impure CMYK Black is used (sum of Cyan, Magenta, and Yellow exceeds 70%) Determines whether the PDF file contains any impure black. Black produced when the sum of cyan, magenta, and yellow inks exceed 70% is considered impure. Impure CMYK Gray is used (equal and non-zero amounts of Cyan, Magenta, and Yellow) Determines whether the PDF file contains any impure gray. Gray produced by equal amounts of cyan, magenta, and yellow is considered impure. Spot Color Spot color is used Identifies painted spot colors in the PDF file. Spot color definition is ambiguous Determines when two spot colors use the same name but have different alternate color space (ACS) values or different recipes (for example, CMYK equivalents) in the PDF file. Spot color suffix is not Determines specific PANTONE spot color name endings in the PDF file. In the list, you can select C, CV, CVC, CVS, CVU, CVP, or U. Spot color has an alternative color space other than CMYK or Gray Identifies spot colors with an ACS definition other than CMYK or gray in the PDF file. Number of separations Determines the number of separations in the PDF file and compares it to a number that you specify. To specify the number of separations, select a setting in the Options: Is list, and type a number in the adjacent box. Rendering Parameters Custom transfer curve used for images Determines whether the PDF file contains a custom transfer curve. A custom transfer curve adjusts the values of color components in the file to compensate for the output device and the human eye. The transfer curve can be text and line art, images, or any other element. Custom halftone curve is used Determines whether the PDF file contains a custom halftone curve. A custom halftone curve defines characteristics such as screen angle, frequency, screen shape, and proprietary screen names. Screen information is applicable to RIPs that convert data to bitmaps. Under Color Removal function is used Determines whether the PDF file contains an under-color-removal function. An under-color-removal function reduces the amounts of cyan, magenta, and yellow to compensate for the amount of black that was added by black generation. Rendering intent for text and line art are not Determines whether the rendering intent for the text and line art is not one of the on-screen settings. In the Options list, select one of the following settings: Absolute Colorimetric Colors are solely represented using the light source. No correction is made for the output medium's white point. For example, an output medium's white point might be the color of paper with no print marks on it. Relative Colorimetric Colors are represented using a combination of the light source and the output medium's white point. Perceptual Colors are represented in a way that provides a pleasing perceptual appearance. Saturation Colors are represented in a way that preserves or emphasizes saturation. The rendering intent influences the conversion from device-independent color spaces to a target color space. Rendering intent for images is not Determines whether the rendering intent for images in the PDF file is not one of the on-screen options. In the Options list, select one of the following options:
To change the rendering intent setting, select the Fix check box. For example, if you selected Absolute Colorimetric in the Options list and PDF Preflight detects that images are not set to Absolute Colorimetric in the PDF file, PDF Preflight changes them to Absolute Colorimetric when you select the Fix check box. Rendering intent is used Preflight detects the use of the rendering intent operator in the content stream and reports its use. Black generation curve is used Determines whether the PDF file uses the black generation curve, which calculates the level of black to use when converting RGB colors to CMYK. Detect if Halftone phase is used PDF Preflight detects whether the PDF file contains halftone phases. ICC Profiles Text and line art <list> tagged with ICC profile Determines whether the PDF file is tagged with an ICC profile for text, line art, and images.
In the adjacent list, select a profile. Multi Channel NChannel color space is used PDF Preflight detects whether a PDF file uses NChannel color spaces. Separation None color space is used PDF Preflight detects whether a PDF file uses separartion None color spaces. |
Processus et RVB
Un motif ou une couleur indexée est utilisé
Remarque : Les deux paramètres sont universels : si vous les sélectionnez lors de la vérification de la couverture d'encrage faible, ils s'appliquent également si vous cochez la case Encrage supérieur à.
Remarque : Les deux paramètres sont universels : si vous les sélectionnez lors de la vérification de la couverture d'encrage faible, ils s'appliquent également si vous cochez la case Encrage inférieur à.
L'intention de rendu influence la conversion des espaces chromatiques indépendants du périphérique vers l'espace chromatique cible.
Pour modifier les paramètres d'intention de rendu, activez la case à cocher Corriger. Par exemple, si vous avez sélectionné Colorimétrie absolue dans la liste Options et si PDF Preflight détecte que les images ne sont pas définies sur Colorimétrie absolue dans le fichier PDF, il les convertit en Colorimétrie absolue lorsque vous activez la case à cocher Corriger.
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使用图形或索引颜色
注: 这两项设置通用:如果您在检查油墨覆盖率是否过低时选择了这两个选项,则在选中了油墨覆盖率高于复选框时也适用。
注: 这两项设置通用:如果您在检查油墨覆盖率是否过高时选择了这两个选项,则在选中了油墨覆盖率低于复选框时也适用。
输出转换意向会影响从设备无关的颜色空间到目标颜色空间的转换。
要更改输出转换意向设置,请选中修正复选框。 例如,如果从选项列表中选择了绝对色度,但 PDF 预检在 PDF 文件中检测到图像未设置为绝对色度,则在选中修正复选框时,PDF 预检会将图像更改为绝对色度。
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Muster oder indizierte Farbe wird verwendet
Anmerkung: Diese beiden Einstellungen sind universal gültig: Wenn Sie diese beim Prüfen der Farbdeckung auswählen, gelten sie auch, wenn Sie das Kontrollkästchen Die Farbdeckung liegt höher als aktivieren.
Anmerkung: Diese beiden Einstellungen sind universal gültig: Wenn Sie diese beim Prüfen der hohen Farbdeckung auswählen, gelten sie auch, wenn Sie das Kontrollkästchen Die Farbdeckung liegt niedriger als aktivieren.
Der Gestaltungstyp beeinflusst die Umwandlung von geräteunabhängigen Farbräumen in Zielfarbräume.
Aktivieren Sie das Kontrollkästchen Korrigieren, um die Einstellungen des Gestaltungstyps zu ändern. Wenn Sie beispielsweise in der Liste Optionen den Eintrag Absolute Farbmetrik ausgewählt haben und PDF Preflight erkennt, dass die Bilder in der PDF-Datei nicht auf „Absolute Farbmetrik" eingestellt sind, ändert PDF Preflight die Einstellung und setzt die Bilder auf „Absolute Farbmetrik", wenn Sie das Kontrollkästchen Korrigieren aktivieren.
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È in uso un modello o un colore indicizzato
Nota: Queste impostazioni sono universali. Se vengono selezionate quando si desidera ottenere una copertura di inchiostro ridotta, avranno, inoltre, valore se verrà selezionata la casella di controllo Copertura inchiostro superiore a.
Nota: Queste impostazioni sono universali: se vengono selezionate quando si desidera ottenere una copertura di inchiostro elevata, avranno, inoltre, valore se verrà selezionata la casella di controllo Copertura inchiostro inferiore a.
Il tipo di resa influenza la conversione da spazi colore indipendenti dal dispositivo a uno spazio colore di destinazione.
Per modificare l'impostazione del tipo di resa, selezionare la casella di controllo Correggi. Ad esempio, se è stata selezionata l'opzione Colorimetrico assoluto dall'elenco Opzioni e PDF Preflight rileva che le immagini non sono impostate su Colorimetrico assoluto nel file PDF, PDF Preflight modifica l'impostazione in Colorimetrico assoluto se viene selezionata la casella di controllo Correggi.
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Se utiliza un espacio cromático indexado o tramado
Nota: Estas dos configuraciones son universales: si las selecciona cuando comprueba si hay escasa cobertura de tinta, también se aplicarán al seleccionar la casilla de verificación La cobertura de tinta es superior a.
Nota: Estas dos configuraciones son universales: si las selecciona cuando comprueba si la cobertura de tinta es alta, también se aplicarán al seleccionar la casilla de verificación La cobertura de tinta es inferior a.
El procesamiento del color afecta a la conversión de los espacios cromáticos independientes del dispositivo a un espacio cromático objetivo.
Para cambiar la opción de procesamiento de color, active la casilla de verificación Solucionar. Por ejemplo, si seleccionó Colorimétrico absoluto en la lista Opciones y PDF Preflight detecta que las imágenes del archivo PDF no están definidas como Colorimétrico absoluto, PDF Preflight las cambia a Colorimétrico absoluto al activar la casilla de verificación Solucionar.
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