Color Profile Creation

steps complete the framing & focus, exposure (rough), and white balance (rough) pre flight steps using capture one according to the dt reflective digitization guide – but aim to be approximately one stop underexposed if you’re using a phase one ixh camera and dt autocolumn system, both framing and focus can be set in one click using autoppi inside of live view in the color profiles panel of dt nexus, click “create new profile” to launch a new window to guide you through the color profiling process, which will also fine tune the exposure and white balance flat fielding following the prompt, place either a white or gray card on the imaging surface, covering the entire field of vision for a white card, under expose the image by one and a third stops using the shutter speed exposure adjustment for flat fielding (if required) should only be done with shutter speed changing the aperture will affect the accuracy of the profile select “capture flat field” for dt nexus to capture an image of the card and generate an lcc profile if a white card was used for flat fielding, return the exposure to the initial exposure after the capture is complete in capture one, select an image of your white or grey flat fielding card in the color profiling wizard in dt nexus, click "use selected image(s) " the flat fielding step can be skipped by clicking the "skip" button in the lower right corner of the wizard this will affect the quality of the profile detect targets following the prompt, place one or more of the supported targets in the imaging area see dt nexus preflight docid\ m6r1szflih lhwzpivrnx for the list of supported targets click “capture targets ” for dt stellar or dt gemini users while in beta release, dt nexus will capture both a white and sapphire light capture to generate profiles for both standard and fusion modes for more on fusion mode, see fusion capture docid\ zwsz5f66df1cmen5avn68 after the beta, color profiling will be dependent on a license for fusion in capture one, select an image or fusion pair that contains one or more color profiling targets in the dt nexus color profiling wizard, click "use selected image(s)" proper profile creation and validation requires two separate color targets one target is required for profile creation but for independent validation of this profile, we recommend a second target when selecting a target for initial profiling, dt recommends the dt ngt2 this allows the fadgi 19264 target to be reserved for validation of all metrics (color, sfr etc) for more information see the importance of evaluating color quality using an independent target on the dt website dt nexus will detect the target(s) and their serial numbers, if available it will automatically select the optimal target to create a new color profile and apply specific measurements for serialized targets when possible dt nexus profiling engine includes compensation for exposure and white balance minor underexposure of the raw file used to create the profile is recommended if you overexpose the raw file, the quality of the profile will be negatively affected note that "generic" values for the ccsg and ngt2 are based on averaged measurements by dave wyble while generic values for the isa and dt nexus transmissive targets are from specific serial numbers (tp24001 and tv24001) generic values are significantly less accurate than serial number specific measurements dt nexus will create the profile or profiles a standard icc profile will always be created if a fusion capture pair was selected then a fusion profile will also be created the target measurements file used to create a fusion profile must contain spectral data upon creation of the color profile, several color metrics are displayed average delta e, 90th percentile delta e, and max delta e above these metrics are two drop downs to select a quality standard and material type to quickly see if these metrics pass the designated use case a pass is indicated by a blue checkmark next to the metric a fail is indicated by an orange warning icon some standards do not have guidance for some metrics for example, most fadgi controls for average and 90th percentile delta e, but not for maximum delta e moreover, the current (2023) fadgi guideline does not control for deltae for film materials in these cases there will be neither a checkmark, nor fail icon for those metrics click the "heatmap" toggle at the top of the target image viewer to see deltae of individual patches use cmd + + to zoom in on the target image do not be alarmed if the deltae results for fusion profiles are not as low as the white profile on the profiling target see suggested capture settings docid\ tcmv37c6vzhvn rhthcd1 for more information if a color profile does not meet the required standard, consult the color profiling troubleshooting docid 96qdkhu1tz8jf9vf9hwuz section click “save profile” to save and exit the color profile window dt nexus will request to restart capture one, after which the new icc profile will be available under capture one's base characteristics tool the icc profile will also be automatically applied to the target capture that was selected for profiling the fusion profile (if created) will be available under the nexus \[export >fusion processing] tool for more about the disk location of the resulting profile files see user file locations docid 1 nbecvcegzycwfshupve