Category Archives: Post-Processing

Principles and tools for post processing

Twirl Effect

Posted on October 14, 2020 by Geoff Shaw

Twirl, found under Filters>>Distort in the Photoshop menu can be used to make some interesting effects. Consider the simple crossed lines image below. Activate the Twirl dialog, and adjust the Angle slider to achieve your desired degree of twirl. I’ll … Continue reading →

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The making of “At Home with the Mouse Family” by Bob Thomas

Posted on October 12, 2020 by Geoff Shaw

Bob has kindly shared a short video to show how he made his award winning entry “At Home with the Mouse Family” 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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Split Toning

Posted on September 23, 2020 by Geoff Shaw

Think about the light on an image. Consider an image with end of day sunshine casting shadows across a landscape/cityscape. The sunlit areas get warm, orangish light, whilst the shadows will be colder, with light from the blue sky. You … Continue reading →

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Doug Porter – Hons SIG 10 June and Creative SIG – 11 Aug 2020

Posted on September 2, 2020 by Geoff Shaw

Here is a chance to see some of Doug Porter’s expertise as he transforms mediocre images in Photoshop to amazing works of fine art. Continue reading →

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Smart objects (Photoshop)

Posted on August 28, 2020 by Geoff Shaw

Before smart objects were introduced to Photoshop, if you edited a pixel layer, you changed the data in that layer so your edits were a one-way process. Smart objects changed that. A smart object’s base image is edited non-destructively. Any … Continue reading →

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HowTo – Starburst

Posted on August 25, 2020 by Geoff Shaw

Page in progress… stuff from Tim Here is a link to a video which I thought was pretty good for the starburst effect: I tried this out and I did not have as much success as was evident in the … Continue reading →

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Colour Management

Posted on August 25, 2020 by Geoff Shaw

PAGE IN DEVELOPMENT Colour vision and the human colour perception metamerism basic concepts of colour capabilities of devices, why use a colour management workflow? gamut colour space mapping between RGB, CMYK, LAB. Color spaces sRGB vs AdobeRGB RAW –> demosaicing/interpolation. … Continue reading →

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Basic Edits – Colour

Posted on August 24, 2020 by Geoff Shaw

Colour is complex, and you can find hundreds of books on the topic and a search for “photography colour management” on a popular search engine found 121 million hits today. My notes here will be just a brief introduction. I … Continue reading →

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GIMP – GNU Image Manipulation Program

Posted on August 20, 2020 by Geoff Shaw

GIMP is a cross-platform image editor available for GNU/Linux, OS X, Windows and more operating systems. It is free software. GIMP provides sophisticated image editing tools similar to those in Photoshop. There is a vast array of 3rd party plugins that can extend the functionality of GIMP. Continue reading →

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