Image Conversion

Convert image files for profile evaluations

Image Conversion

Overview

The Image Conversion tool converts pixel-based files for profile evaluations, e.g. when evaluating a demo version of CoPrA or to find the profile settings that provide the best color rendering. It is also convenient to test the profile quality on images directly in CoPrA, since typical applications often do not support all types of DeviceLink (e.g. RGB to CMYK) or Multicolor profiles. When running a demo version of CoPrA the tool allows conversions of images using CoPrA demo profiles (encrypted profiles) for further evaluation in other programs (i.e. Photoshop). Supported are PSD, TIFF and JPEG files which can be converted using ICC device profiles or DeviceLink profiles. 

Conversions can be saved in piled layers in a single file to better check different color conversions in Photoshop. 

The image preview uses the embedded profile of the image, or the specified source profile if there is no embedded profile, to convert the images colors to the display profile. In other words, if the monitor is calibrated the image is shown in true colors.

Procedure

Load an image file (TIFF, JPEG, PSD) to convert

Either drag-and-drop the file to be converted onto the Source File button or click the button and select the file.

A preview of the image is shown in the preview panel on the right. If a profile is embedded, it will be displayed under Embedded Profile. The color space of the image is indicated by an icon next to the image location path.

Note: The Image Conversion tool does not support retaining Photoshop layers or transparencies. Nonetheless image files such as Photoshop PSD and TIFF files with layers or transparencies will be converted correctly, however, only the compatibility layer will be color converted while additional layers and transparencies are removed.

Choose a source and target profile or a DeviceLink profile

Apply either a normal ICC conversion with source and target profile or a DeviceLink conversion.

For a standard ICC conversion from source to target profile, the Rendering Intent can be defined. In addition to the typical four ICC rendering intents, Blackpoint Compensation is available as a fifth option.

Notes:

  • Blackpoint Compensation is the relative colorimetric intent with additional black point compensation, as in Adobe Photoshop.
  • All profile drop-down menus function like search fields. Simply type in some letters of the desired profile and only those profiles containing these letters will be shown in the list. To select a profile simply click on it.
    Alternatively you may open the drop-down menu with the little arrow on the right and select a profile from the full list as usual.

For a DeviceLink conversion select the desired DeviceLink profile from the drop-down menu Source Profile. In this case it is not necessary to select other settings, such as the Target Profile or a rendering intent, therefore, these settings are grayed out.

Note: Image Conversion supports serialized profiles as well as encrypted demo profiles. Serialized profiles are those created with CoPrA SP (Serialized Profiles). Profile quality can be evaluated from either serialized or encrypted demo profiles when converting images.
If a serialized profile is to be embedded in the converted image file using Embed target profile, CoPrA will decode and embed the profile in the converted image with a smaller grid size. This ensures that other applications display the converted file correctly. Note, however, that this profile cannot be used for production purposes as the profile quality is reduced. For that reason, such profiles are marked as LOW QUALITY VERSION FOR DEMO ONLY in the file name. 

Convert to Lab: Converts the image into the Lab color space which is useful for comparing images with differing target color spaces or to evaluate the color appearance of Multicolor profiles. The latter is very convenient as Adobe Photoshop does not display Multicolor images correctly in the preview and does not support conversions from Multicolor to Lab.

Paper White Simulation: When the Convert to Lab checkbox is enabled, the Paper White Simulation checkbox can also be activated. If activated, the conversion to Lab uses the absolute colorimetric rendering intent, if disabled, it uses the relative colorimetric rendering intent.

Embed target profile: If a target profile is available it can be embedded in the converted file. This is also true for target profiles of DeviceLinks.

Select a Mode

Save Image: Saves the converted image. Available file formats are TIFF, JPEG or PSD.
Note: Only suitable file formats are listed, since some formats do not support all color spaces.

Use Layer: Allows to add layers to a converted image in PSD file format. Other formats can not be selected.

Add Layer: To test various profiles, the same original image can be converted again with different profiles, and the resulting files can be stacked as layers in a single file. Such a PSD file allows to switch between the layers in Photoshop to evaluate the quality of the conversions. For a better identification of the profiles that have been used the layer names contain the profile names.

Select Layer File: Defines the image file to which the new layer will be added. Either accept the suggested file name or enter a custom file name.