Tag Archives: gifs

Fun with Vedic Squares⤴

from @ wwwd – John's World Wide Wall Display

Given I want a nice gentle start for my class this session I thought we would play with Vedic Squares. I was reminded of these and their possibilities from a tweet I’d bookmarked from Blair Minchin.

We started on Last Thursday making multiplication grids then vedic squares, making patterns by joining the same numbers with lines.

vedic square vedic square


The next day we recreated the grids in Numbers. I then explained conditional highlighting so that the class could colour the grid. They were fascinated by both the process and the results. The Gallery below steps through the process.

Screenshot sizing the table

The next step was to screenshot the grids and place them in keynote to duplicate and create symmetrical patterns. At this point some of the class started animating their patterns to rotate madly in keynote. At that point gifs became obvious;-)

Here is the process in Keynote.

Paste Screenshot into Keynote Duplicate & Rotate to make symetrical pattern Align graphics Select and group Animate, angle 359, rotations 1 Acceleration set to None

For a gif purist like myself Keynote gifs are a bit off. Very big files indeed. This got a little better after I explained that they didn’t need 999 rotations for a gif, one would do. Getting rid of any easing in the rotation and any delay in the export gives a straightforward rotation.

A quick screencast of rotation settings and gif export:

I particularly enjoyed the excitement as the class saw the conditional highlighting in action and then that the animation step was suggested by the pupils. There is still a lot to explore around both the patterns and processes. I hope that the class will further explore both, opening up links to maths, R.E. and art.

Shrinking Squirrels⤴

from @ wwwd – John's World Wide Wall Display

I do like a gif. I like to make them in all sorts of ways. Recently I’ve been messing about with Live Photos. The mac Photos app will export gifs from these but they are huge. To my mind a gif should be as small as possible. The other problem wit Live photos is my hands tend to move. Today I tried the iOS app Motion Stills:

Motion Stills is an app from Google Research that uses advanced stabilization and rendering to turn your Live Photos and videos into GIFs

The only problem is that the files are pretty big. I took a photo of a squirrel in the botanic gardens this morning and ran it through the app. The stabilisation was great but the file size for the image was 8.7MB for a 480 × 360 image!

I decided to see if I could shrink it a little and got it down to 331kb. This is how:

  1. I opened in the Gif in FireWorks
  2. The gif had 54 frames at 3/100 of a second and one at 6/100 of a second. I deleted every second frame and doubled the length of each.
  3. The gif was set to have an exact pallet with 256 colours, i changed that to Adaptive and 128 colours.
  4. I set the loss to 20%
  5. I made a new layer which was shared across the frames. copied the first frame to that layer and cut out a space for the squirrel in the top layer. This froze most of the image except for the squirrel.

The featured image of this post is the shrunken gif.


Gif Cam on Raspberry pi⤴

from @ John's World Wide Wall Display

I’ve got my raspberry pi working as a webcam posting gifs every 9 minutes and stills every 5. Gif Cam.

The pi has been sitting around for a while acting as a web server with a broken tweetbot. It took very little effort to get it taking photos from our window and showing them on the web. Little more to grab a bunch and gif them (Gifsicle again). A better view might be more interesting.

I’ve not spent as much time as I’d like playing with the pi but the potential for play, learning and work seems large.