Chapter 3 Metadata
Outro
But before that there is one last thing we may want to change in our image. The metadata it contains. Thorough the workflow there is a lot of chance to lose that information, but it may be important in the end. If it is, then we will have to recreate that data based on one of the source images. Exiftool17 is a command-line application that can do exactly that. We may copy the required metadata only or everything that a source image contains.
The programs in this workflow were running under Microsoft Windows 10 operating system, but since the open source community works mostly with Linux these options are usable under the most popular Linux distributions as well. Beside these there are programs that run only under a Linux or Mac. For example Darktable is a Linux only program that can be used to catalogue images and process raw files in a similar way Rawtherapee does. For Mac there is a program called HDRtist, an HDR generator and tone mapper. These are solutions I hadn’t got the chance to test yet, but give them a try if you have the time and the needed equipment. Using free software may require more time in the beginning and you may have to look for information in places you usually would not, but in return you will gain a lot better understanding how and why things works as they do. This kind of knowledge can help to find better and faster methods developing HDR images, so the invested time will pay-off.
The later can be done with the command in the screen:
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As you see it is possible to work with HDR without spending money on any software. We can spare few euro this way that we may use later on to buy a few stuff we really have to pay for.
exiftool -TagsFromFile src.jpg “-all:all>all:all” target.jpg. If we have to change the metadata after this, or just simply remove specific entries from the final image Rawterapee can be our program of choice. It has a lot of option to rewrite the data stored along with the images and delete tags that has no meaning anymore like exposure bias or shutter time. HDR Photography - A Practical Guide
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