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RawDigger 1.1.0

Changes

Histograms

  • for 3-channel and 1-channel raw data only 3-channel and 1-channel histograms are displayed, correspondingly. Empty histogram windows for non-existing channels are not displayed now.
  • additional settings to control the display of 4-channel histograms for Bayer RGBG raw data (Preferences - 'Histograms' - "Histogram for RGBG bayer images"):
    • Display G1 and G2 - to display 4 histograms

RawDigger 1.0.9

Changes

  • New Preferences Tab: Settings related to specific data formats or manufacturers only (that is, Sony ARW2, Panasonic, PhaseOne, Sigma dp2 Quattro, Canon/Nikon sRAW/Small RAW), have been moved to the "Vendor Specific" subsection within the Data Processing settings section. Settings affecting all cameras/data formats remain in the main "Data Processing" section.

     
  • Sigma dp2 Quattro support:

    The following settings in the "Data Processing -> Vendor Specific" Preferences subsection have been added:

RawDigger 1.0.8

Changes

  • Added indicators for Statistics box headers:
    • [M] in Image Statistics box - Masked Pixels is ON
    • [F] in Selection/Sample box - Discard abnormal pixel values mode is ON (pixels with outlying values are filtered off)
  • If a damaged RAW file is detected, the warning is issued and an attempt to open the file is still performed (previously such a file was just skipped with a warning)
  • New keyboard shortcuts added (you can use both old and new ones)
    • Ctrl-1 (Mac: Cmd-1) - 100% zoom

Digging into Nikon RAW Size S NEFs

RawDigger. sNEF

With D4s camera Nikon introduced the new file format they refer to as RAW Size S NEF:

  • It contains not RGB but YCbCr data much like a JPEG;
  • The data is 11-bit;
  • The tone curve is applied to the data;
  • The in-camera white balance is applied to the data;
  • The pixel count is 4 times less than with regular NEF files;
  • The color information is shared between two adjacent pixels (in other words, chroma is recorded for each other pixel);
  • The file size is insignificantly smaller than full resolution 12-bit lossy compressed NEF;

RawDigger 1.0.7

Changes

  • For DNG files having CFA pattern dimensons different from the dimensions in BlackLevelRepeatDim tag black level is displayed correctly:
    • on the BlackLevel button
    • in the black level fields in Prefernces, given Reset Black Level on file load is enabled
  • When the black level is set manually Black Level button at the lower left corner of the main window indicates the number of black level values according to the number of channels (it was always 4 numbers previously)

RawDigger 1.0.6

Changes

  • Support for Nikon Small Raw (D4s NEF Size S):
    • To extract unprocessed YCC data, switch on
      Show YCbCr data for Canon/Nikon sRAW files in Preferences - Data Processing.
    • To disable Cb/Cr interpolation, switch on "Do not interpolate Cb/Cr channels data (Canon/Nikon sRAW)" in Preferences - Data Processing.
    • In RGB-mode ("Show YCbCr…" setting is off) the image is rendered from luma and color-difference data:
      * linearized

RawDigger: detecting posterization in SONY cRAW/ARW2 files

RawDigger. Star Trails

Lossy compression of raw data is currently the only option available in Sony cameras of series NEX, SLT, RX, ILCE, ILCA, and the recent DSLR-A.

The first part of this article is showing how to detect artifacts caused by this compression. We will be discussing the technical details of this compression in the second part of this article.

In the vast majority of cases, the compression artifacts are imperceptible unless the heavy-handed contrast boost is introduced. There are, however, exceptions. With some unlucky starts in alignment, the artifacts can become plainly visible, even without much image processing.

All that is necessary for the artifacts to threaten the quality of the final image is a combination of high local contrast and a flat featureless background.

Lets have a look at the example, which was first published by Lloyd Chambers in his blog.

RawDigger 1.0.5

New Features

  • New Sony processing mode
    Preferences - Data Processing - Sony ARW2 processing options - Delta step relative to value
    This mode is to display the ratio of the minimum delta step to the pixel value. For those image areas where this ratio is large and the contrasty details do not exist (like it is in the sky) the normally processed image may exhibit visible posterization. The values are displayed in per mil (a tenth of percent, or one per thousand).

RawDigger Histograms, part 3: Overexposure Shapes

RawDigger.

Different cameras, even if based on the same sensor, may render extreme highlights at around clipping point differently, and differently, with different values of clipping points, depending on ISO setting. It is important to recognize the look and calculate the practical clipping point, which is not always the same as the maximum raw value.

Here we will try to demonstrate the typical “looks” of the histogram of the clipping zone.

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