If you go with Rawdigger, you can use it both as part of a procedure to optimize your in-camera histogram, and as a way to see how close it is to the raw histogram. If you’re comfortable with the interface, go for it DCRaw is very powerful and available free. The reason I don’t generally recommend it is that is it a command-line program – it has no graphical user interface, although there are programs that provide a GUI for DCRaw. There are several other programs for this one of the oldest is DCRaw. I currently favor a program called Rawdigger, which allows you to do both, and is available here. You’re going to need a program that allows you to look at the values in the raw files that your camera makes and/or the EXIF data in those files. How can I tell if the in-camera histogram is close to the real raw histogram? Usually, you’ll want to reduce the contrast a bit. Once you’ve set up your camera for UniWB, you can make a few tweaks to get the in-camera histogram even closer to the true raw histogram.
This is a downside of the UniWB approach, and I don’t know of a practical workaround, although a magenta filter over the lens can ameliorate the situation with some side effects (more on that here). You will no longer be able to judge colors while chimping. Since camera sensors are usually more sensitive to green than to red or blue, the JPEG image of a camera adjusted for UniWB will appear unnaturally green. Most of this paper is about ways to do that. This situation is called “UniWB”, which is textual and verbal shorthand for “Unity White Balance”. Another way to say this is that the white balance coefficients should all be nearly one.
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This version of RawDigger is delivered as a download, and the license key can be installed on up to two computers simultaneously.The single most effective thing you can do is to change the white balance that the camera uses to process the JPEG image so that it favors no primary over another.
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It works on a variety 32/64-bit Windows, Intel-based Mac platforms and Linux Wine-1.2.3 Wine (1.3.37-0ubuntu1~ppa1~lucid1) and Debian testing. Value camera: 24 megapixel APS-C sensor with EVF and vibration-free. RawDigger doesn’t alter the raw data in any way. In essence, it is a microscope of sorts that lets you drill down into raw data.
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The software can read files from any media, from a flash card to a network server. RawDigger and FastRawViewer Support Sony A1 Lossless-Compessed RAW. What is RawDigger RawDigger by LibRaw, LLC, is a tool to visualize and examine pure raw data as the camera has recorded it. RawDigger supports all raw formats (including DNG) associated with a list of more than 800 supported cameras, and frequent updates are made to support new DSLR and cell phone models. Additionally, indicators for over- and underexposed image areas show you exactly where and in which color channel(s) details are blown out or have noisy shadows, with statistics to indicate the percentage of over- or underexposed pixels. The software allows you to monitor and improve studio lighting setups in terms of white balance/light uniformity, and dynamic range.
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It also helps you to use spot-metering, exposure compensation, and manual exposure settings more efficiently and reliably. RawDigger can help you determine the calibration of an in-camera exposure meter and quantify different vignetting sources. It can also be exported for further study as a spreadsheet (CSV) or a graphic file (PNG) for presentation.
To facilitate accurate raw image study, the histogram for either the entire file or an isolated image segment can be viewed in all modes (RGB, raw composite, and raw per channel).
RawDigger allows you to display and research data from the real raw histogram, which greatly differs from the in-camera histogram, as well as histograms presented by most raw converters. The Exposure edition is intended for everyday use, to help practitioners who are serious about extracting the maximum quality from their camera by delivering precise exposures. With this software, the isolation layer normally imposed by raw converters becomes transparent. RawDigger is not a raw converter it is a microscope of sorts that lets you drill down into your image files and visualize the data that will be used by raw converters. Access, view and analyze the pure raw data as recorded by your DSLR and certain video cameras with RawDigger's Exposure Edition from LibRaw LLC.
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