Raw Therapee for Developing Raw Images

Figure 2.14

RawTherapee's program screen offers many options and seems a little cluttered at first. The program offers a row of functions that are available in GIMP but not in UFRaw. In RawTherapee, you can perform all the steps in 16-bit color depth per channel.

Figure 2.14

RawTherapee's program screen offers many options and seems a little cluttered at first. The program offers a row of functions that are available in GIMP but not in UFRaw. In RawTherapee, you can perform all the steps in 16-bit color depth per channel.

GIMP developers recommend UFRaw for developing RAW images. It works as a plug-in to GIMP. UFRaw is integrated in distributions for Apple Macintosh.

Another easy to use, extensive, and free program for developing RAW photos is RawTherapee. It can be downloaded at http://www.rawtherapee. com and is available for Windows and Linux. RawTherapee is not a plug-in for GIMP. It's an independent program and a great alternative for developing RAW photos. Through an internal link, you can open your developed pictures in GIMP. Like UFRaw, RawTherapee is based on dcraw.

Unlike UFRaw, you can open also some other file formats, such as JPEG, TIFF, PNG (UFRaw only supports RAW, RAW-JPEG, RAW-TIFF and UFRaw ID files). Due to its large range of functions, the program is suitable for the most common steps in editing pictures, that is, white balance, shadows/highlights, sharpening, and noise reduction.

The following overview offers an insight into a wide selection of options in RawTherapee 3.0 alpha.

You can select your images in the File Browser, the left column of the program window. The program depicts the images as thumbnails in the middle preview window. The size of the thumbnail preview images can be adjusted using the magnifier icons on top of the preview window.

A double-click on the image chosen in the preview window of the file browser opens the image. The program offers a Navigator window and an (Undo) History in the left column. You can use this feature to undo working steps of your editing. The central preview window shows the enlarged image and some tools to perform basic manipulations, such as rotate, straighten, and zoom the preview image. The preview of the image is a real-time preview, depicting the changes to your image as you make them. On the bottom of this window are the buttons to save or send the image to another editor (more about them shortly). The right column shows a histogram of your image.

The lower part of the right column contains the actual editing functions that can be accessed over several tabs:

• Exposure contains functions to adjust the brightness of the image. You can correct brightness, contrast, and other values with the sliders of Exposure. You can apply several methods of Highlight Recovery and lighten shadows or darken highlights with Shadows/Highlights.

• Detail offers functions to sharpen and reduce noise in an image.

• Color lets you adjust colors in the image. You have the options of correcting the white balance and color temperature, changing the color with a channel mixer (see section 2.5.11), using a color booster (correction and saturation), setting the color tone (color shift), and setting the ICM color profile.

2.3 EDITING IMAGES IN GIMP

• Transform lets you crop and rotate the image and correct distortion. In addition, you can correct chromatic aberration and the effects of vignetting and resize the image to your preference.

• Metadata contains EXIF and IPTC information.

• The buttons on bottom of the preview window are as follows:

• Save Image: After editing, you can save the image in the TIFF and PNG formats with either 8 or 16 bits per channel. You can also save the image in JPEG with 8 bits per channel.

• Put to queue: When this button is clicked, the open image is sent to the queue of images waiting to be rendered.

• Send to editor: This button opens your image in the editor of your choice. If GIMP is installed then you will find GIMP as the default setting.

As I said, RawTherapee is a compact autonomous program for the most common editing steps.

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Responses

  • Roy
    How to rotate and auto crop an image with gimp like lightroom?
    6 years ago
  • leonie
    How to rotate image rawtherapee?
    6 years ago

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