![]() Converting the images from DNG to 16bit ACES EXR The only difference I did for the reference is to add ‘_ reference‘ into the filename.Īt this stage, you should have a version of all your images in the. Repeat the step for your reference data set. You should then have something like the following: Once you are happy with your settings, hit Convert I like to then set a naming convention for my images, so I use something like the following: ![]() So, something like: …/hdri_int_workshop_pos1001/ hdri/dng Then set the save location to ‘ Save in New Location‘ and create a dng folder within your hdri folder. To do this, load the tool and then select the /hdri/cr2 folder the the 1st part of the tool. To convert your camera images from RAW (in my case CR2) to EXR, you can use Adobe Digital Negative (DNG). Once I have my data organised, I’ll go through the process of converting the hdri data. For example:Ĭonverting the images from RAW (CR2) to EXR …/hdri_int_workshop_pos1001/ reference/cr2Īnd lastly, if you have images of the slate, copy them into the following path: /slate/cr2.Then that all the reference images (the Macbeth chart, grey and chrome ball) and from them all into the following path: /reference/cr2. Next, take all the pics that will be used for the HDRI 360 panorama and drop them all into the following path: /hdri/cr2. I am using this naming convention to state that the dataset is a high dynamic range image ( hdri), it was shot in an interior ( _int), the environment was a workshop and it was in the first position ( _pos1001) Once you have all your data, copy them into a folder so you can start editing them. I do shoot a specific brackets series top-down to minimise reflections on the ColorChecker The ColorChecker to be useful in this context should be sampling as much of the same Illumination than the HDRI, given that we are mostly interested by the upper hemisphere, it makes sense to put it flat pointing to the sky so that there is no preferred angle in the upper hemisphere that would bias the measured values. The Illumination captured by your HDRI is only right at the very single point where the lens entrance pupil was, anywhere else and you start to introduce error, thus the ColorChecker needs to be very close. I would suggest is to lay the ColorChecker flat where you are shooting the HDRI. When shooting the Macbeth chart, here is some very useful advice from Thomas Mansencal (which I’ll be implementing on future shoots): You should have also shot a Macbeth chart using the same settings, and ideally a grey/chrome ball that can be used for reference. At this stage, you should have a dataset for your HDRI which will consist of a 7+ bracketed set of exposures from 3 or 4 different positions (shot every 120 degrees or 90 degrees).
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