Amount is the strength of the sharpening effect and Threshold tempers the effect of noise and halos. For most images, this is best set to between 0.5 and 0.7. The radius tool defines the size of the details to be sharpened. Unsharp Mask is usually the best option, RL Deconvolution is best suited to images with Gaussian blur. This can be done from the mouse scroll wheel or via the +/- icons at the bottom right of the screen. As with all sharpening, you should zoom into 100% of the image. Under the drop-down, there are two options, the familiar Unsharp Mask and RL Deconvolution.
The sharpening tools come under the Detail tab top right of the screen. You can specify Post-Resize sharpening but we will look at the main sharpening options instead. Bounding box allows you to specify a maximum height or width and will resize to maintain the current image ratio. This can be by scale, width height or bounding box.
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The Specify option allows you to choose how to resize the image. For the method, select Lanczos, this is recommended by RawTherapee. Select cropped if you have previously cropped the image.
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The first drop-down asks whether you wish to apply the resize to the cropped or full image. Resizing For OutputĪssuming you have cropped as required, it’s time to resize.Ĭlick on the Resize Bar in the toolbox to show the resize options. Unlike other programs, RawTherapee maintains the entire image and only crops the final output. One thing you will find is that you do not need to click enter to apply the crop. Cropping does not actually occur until you export the image You can now draw your crop on the screen, fix it to a certain ratio and from the Guide, type drop-down, select a compositional overlay.
With crop open, you need to click on the Select Crop bar in the toolbox. Clicking on the word crop will open or close the crop dialogue. The upper section deals with cropping the image. You are looking for the icon that looks like a protractor with a pair of scissors called Trasform.
The resize and crop tools are found together in the tabs at the top right of the Editor window. The Resize Crop Tool is found on the toolbar If you are not already in the Editor window you can get there either by double-clicking the image you wish to work on in the File Browser or clicking the Editor tab on the left of the screen. We have finished editing our image, now we wish to output the file for printing or for display on the Internet. Today we will concentrate on preparing your image for output. In our last tutorial, we looked at the basics of editing, exposure, shadow/highlights and white balance. Being open source, it is free, but this does not mean that it is any less capable than it’s more expensive rivals. If you are just joining us, RawTherapee is an open source image management and RAW processing app for Windows, Linux and Mac.
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Our first installment, An Introduction to RawTherapee – A Free Photography Software Alternative to Photoshop, sparked a lot of interest and you can see the second tutorial featuring some basic editing techniques here. Welcome to our third tutorial on the basics of RawTherapee.
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