COMP6023 Understanding Digital Colour I & II

These videos explains how Digital Colour works. We will be looking at this over the next few classes. The first one look at SHB and Lab.

The second video looks at RGB and CMYK.

COMP6021 Class 08.1

We looked at transparency and PNG.

Interesting videos about Animated GIFs

Is it GIF or JIF?

COMP6021 Class 07.3

We looked at how JPEG works

When I was finished, students used the time to catch up in the dithering stuff they missed

The video below may also be of use

COMP6021 Class 07.2

I gave out some sample exam questions on dithering. But they didn't mean anything because none of the students in class today were in for the last class. Students should catch up using the videos online, and we will come back to those questions if we get time.

I talked a bit about the assignment 

We looked at GIF

COMP6023 DCOM1 Class 26 GIF & JEPG

We looked at GIF & JPEG

COMP6021 Class 27 Lab

We did some dithering experiments using Photoshop

COMP6021 Class 26 Transparency & PNG

We looked at transparency, alpha channels, and PNG.

[due to a technology failure there is no recording of today's class. The (shockingly similar) class above is from four years ago.]

COMP6023 DCOM1b Classes 27 & 28

We did some experiments with dithering in Photoshop.

COMP6023 ITM1 Classes 27 & 28 Lab

We did some experiments with dithering in Photoshop.

COMP6021/COMP6023 JPEG

Here's an online video I made some time about about JPEG. It is largely the same as what we did in class.

This rather unusual logo has it origins in the way JPEG works.

COMP6023 DNET1/COM1c Class 26 GIF & JPEG

We looked at GIF & JPEG image formats.

[no recording due to technical problems]

COMP6021 Class 25 GIF & JPEG

the one with the DCT

We looked at the main features of the GIF and JPEG image formats.

COMP6023 DWEB1/ITM1 Class 26 GIF & JPEG

We looked at the main features of GIF & JPEG.

Students now ave everything they need to complete Assignment 2.

COMP6023 DWEB1/ITM1 Class 25 Indexed Colour and Dithering

We looked at indexed colour, colour palettes, and dithering.

COMP6023 DCOM1 Class 25 Subsampling, Indexed Colour & Dithering

[no recording today]

We looked at subsampling and interpolation. We saw how 24 bit images can be coded with fewer bits per pixel by using a well chosen palette. We played a palette matching game.

I explained how dithering works and students did an exercise on dithering. There are more such exercises in the notes, for students interested in doing more.

COMP6021 Online Class: Dithering

COMP6023 DNET1/COM1c Class 25 Dithering

We looked at dithering. [no recording]

We did an exercise in class. There are other similar exercises in the slides.

I answered a few questions about interpolation.

COMP6021 Class 24

the one with Colin's tie

We looked at indexed colour palettes and at dithering.

Only 5 students were in class.

COMP6021 Online Class: 1-bit images