Click on the Tone Curve label towards the bottom of the right sidebar in Lumariver, press the Load Base Curve button and select the second TIFF that we exported with the Auto Curve applied. Press the Show Target Grid button and align the corners of the grid that is displayed with the registration marks on the ColorChecker target, then turn on the Grid is in place checkbox. Then select the type of target used, which in this case is the X-Rite ColorChecker SG. My custom white balance showed me a reading around 5000K so D50 is smack on. We then click the Load Image button and load our linear curve TIFF file, and then select the Illuminant that is closest to the light source that we photographed the target in. You can use Lumariver to create DNG profiles for use in Lightroom and Adobe Camera Raw, but our objective is to create a camera profile for Capture One Pro, my raw processing software of choice, so we need to select ICC profile. Next select New Project from the Edit menu in Lumariver Profile Designer and select “General-purpose ICC profile”. We then export the file as a 16 bit TIFF with the ICC Profile set to Embed camera profile, then export a second TIFF with the Curve set to the setting we usually use, so I’ll go with Auto. Then we need to go to the Base Characteristics panel, and under ICC Profile select Effects > No color correction, and also set the Curve to Linear Response. We first use the White Balance picker to set the white balance using one of the mid-gray patches and note that the image is pretty much a perfect 5000K white balance. The Lumariver manual states that exposure should be around 220 on the white patches, and I have a photo of the Digital ColorChecker SG from last year that is around 221 on the white patches, so that’s perfect! This image was exposed so that the white patches were not blinking, but 1/3 of a stop brighter would have made them blink on the camera’s LCD. ![]() Here are the notes I made as I prepared for this episode.
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