There are at least two practical reasons to investigate hidden exposure compensation in raw converters. We will be dealing in depth with Adobe’s converters, but the same method stands for any other converter. The goal of this article is to demonstrate how you can find the hidden exposure compensation your converter is applying to your raw files when opening them. Even avid Exposing To The Right (ETTR) practitioners can get into this trap, as they consider a histogram derived from the in-camera beautified conversion to be an indication of exposure. In fact, the shot may be underexposed, sometimes by more than 1 stop, and the price is more noise, more artifacts, less resolution, and, ultimately, getting a new camera, which doesn’t really solve the problem. It often leaves a false impression of properly exposed raw, as we are so accustomed to mixing up exposure and brightness, judging former by the latter. The brightening of the mid-tones that is done behind the scenes is one of the most common approaches to add punch to a raw image. If you are using or planning to use some raw converter, you may want to know what “beautifiers” it applies, and their price. This is done to make the shot look good, but can also lead to all sorts of confusion. Profile Edition allows applying white balance, normalization, equalization (Flat Field), and filtering of outlying values before data export.As we already mentioned in the previous article “ Where are my Mid-tones?“, most raw converters apply some hidden adjustments to a raw shot, often resulting in a bumped mid-tone, clipped highlights, and compressed shadows. Profile Edition adds selection grids for faster processing of step wedges and color targets, as well as for calculating non-uniformity maps. Profile Edition is for those who need to create sensor calibration data, linearization data, or device data for color profiling. Research Edition adds TIFF export, multiple selected areas via samples, tables of sampled data statistics and histograms over multiple samples, exporting sampled data as CSV and CGATS. It is suitable for a wide range of tasks, starting from personal use and preparing reviews and all the way to programming RAW data processing. Research Edition is meant for camera/sensor evaluation and statistical analysis of raw data. RawDigger is available in several editions:Įxposure Edition is for everyday use and is intended to help those who are serious about extracting the maximum quality from the camera to get precise exposures.Įxposure Edition displays RAW data in all modes (RGB, RAW Composite, and RAW per channel), indicates over- and underexposed areas, displays RAW histogram, image statistics, as well as statistics and histogram for selected area. It helps prepare data for calculations of color transforms and camera profiles. It helps to determine how exposure meters are calibrated, what is the headroom in highlights, which camera setting affect RAW data and how, how a raw converter interprets RAW data and which "hidden" compensation it applies, what tone curve is used for in-camera JPEGs and in a converter. RawDigger can be used to solve a multitude of tasks, including the diagnosis of different problems, such as those with studio lights, lenses, flash, shutter, and aperture accuracy and repeatability, camera drifts, exposure, noise. The primary goals of RawDigger are to help you get better shots and increase the number of "keepers" through better knowledge of the "digital film" you are using, that is, RAW data. In essence, RawDigger is a microscope of sorts that lets you drill down into the RAW by means of visualizations, histograms, and statistics over selections and samples.
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