Category Archives: Basic Edits

G’MIC

Posted on August 24, 2022 by Geoff Shaw

G’MIC, GREYC’s Magic for Image Computing is a full-featured open-source framework for digital image processing. It includes a wealth of image processing filters (about 600 at the time I write this), and is available as a stand alone command line … Continue reading →

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Kaleidoscope effect

Posted on August 24, 2022 by Geoff Shaw

Repeating patterns catch the eye, and the Kaleidoscope effect certainly provides plenty of repeating patterns. Kaleidoscopes use angled mirrors to produce repeated patterns (https://en.wikipedia.org/wiki/Kaleidoscope), but this effect is easily achieved also in software like Photoshop or GIMP. There are lots … Continue reading →

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Feathering

Posted on October 28, 2021 by Geoff Shaw

Feather. This does not refer to plumage of birds, but the fuzziness in a selection or mask or brush. If you will forgive the visual pun, the image right illustrates on the left panel a hard selection (low feathering) with … Continue reading →

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Pixel

Posted on October 28, 2021 by Geoff Shaw

Pixel. pixels are the basic elements of images. Each pixel is a point in the image and has associated values for the brightness of the colours that make up that pixel (Red,Green,Blue or RGB). Black is (0,0,0) ie no brightness … Continue reading →

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Select Subject tool

Posted on July 25, 2021 by Geoff Shaw

Adobe’s select subject tool (and some other applications have similar functionality) is becoming remarkably good, using AI approaches to make sometimes fiddly selections automatically. Here is an example. This is a particularly challenging image – the background is mottled, not … Continue reading →

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Up-Scaling images

Posted on July 16, 2021 by Geoff Shaw

Introduction From time to time you may find you just don’t have enough pixels in your image. For example you may want to make a huge print from your image (or a smaller print from a cropped part of your … Continue reading →

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Monochrome

Posted on March 6, 2021 by Geoff Shaw

A commonly asked question is what subjects are best for monochrome?  I have been casting my mind over this and I cannot give an answer. Thinking back over the last year, I have made monochrome landscapes, cityscapes, seascapes, portraits, photojournalism, … Continue reading →

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Creating realistic shadows

Posted on October 23, 2020 by Geoff Shaw

When compositing it is not enough to simply paste an object onto a background. If you do, it will look artificial and pasted. Shadows are what link the pasted object to the background. Creating realistic shadows requires some technical skills, … Continue reading →

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Local adjustment tools in Lightroom

Posted on September 23, 2020 by Geoff Shaw

Lightroom has three local adjustment tools (excluding the red-eye reduction tool), the linear gradient tool, the radial gradient tool and the paintbrush tool. Gradient tool and Radial gradient tool Clicking the gradient or radial adjustment icon brings up the adjustment … Continue reading →

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Resize an Image

Posted on August 16, 2020 by Geoff Shaw

When you have finished editing your masterpiece, you may want to save a copy with a different size. For example, for WCC competitions, images can be no wider than 1920 pixels and no higher than 1080 pixels. Continue reading →

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