gimp image editing basics

KERRY JOHNSON

BSCI , DIP PM, CERT IV TAE

CONTENT © KERRYJ

Working with digital images

Acknowledgement of Country

Our time together tonight…00:00 - 00:10 Welcome

00:10 - 00:20 Some techy info about digital images

00:20-00:30 Choose and download images

00:30-00:45 Introduction to GIMP, basics of the workspace, menu setup

00:45-00:55 BREAK

00:55-01:10 Open image, scaling and cropping images

01:10-01:25 Colour correcting images

01:25-01:30 Summarise and close

Pixels – the base element of all images

What are you using your image for?Tree Frog size: 57.4 MB

Dimensions in pixels: 2000h x 3000w

Pixel density: 300 DPI (High quality)

Computer monitors: 100-120 DPI

Average internet image: 72 DPI

https://www.iprintfromhome.com/mso/understandingdpi.pdf

Camera megapixels and image quality

Megapixels = vertical x horizontal effective pixels of sensor.

Also consider - print size at desired DPI, lens quality, controls, ease of use.

What’s in a digital image?

Image file formats for sharing

Lossy compression

Details removed, reduced file size

JPG or JPEG

Lossless compression

Re-writes data, no loss of quality

PNG (can be both)

Got an image to edit? If not -

https://www.pexels.com/

Open GIMP

Workspace setup

Reshape Toolbox

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Export = output as a standard file type such as .PNG, .JPG or .GIF

Save = Save your project for later work

Do BOTH of these

You now know how to

Think about image and file size

Set up your GIMP workspace

Scale and crop images

Colour correct and enhance images

Save your work

Next steps

Take your projects and files home

Email me for a handout of this presentation

Haunt YouTube for videos about GIMP

Register interest for an intermediate course

KERRY JOHNSON

BSCI , DIP PM, CERT IV TA

CONTENT © KERRYJ

Working with digital images

kerryank@gmail.com