Dr. Mark Humphrys

School of Computing. Dublin City University.

Home      Blog      Teaching      Research      Contact

Online coding site: Ancient Brain

coders   JavaScript worlds


CA170      CA318      CA686      CA686I

Online AI coding exercises

Project ideas

Computers and Internet - Links


Data Formats

How to do things with images and video



Computers and Internet Links



Search engines

The Internet Archive


Image search engines


Music search

Usenet newsgroups






Lookup sites

3-D visual worlds

Google Street View

Google Street View of Cambridge.
Click to enter.
Beautiful. I dreamed of something like this for years before 2007.



Data Formats

ps and PDF


How to split a PDF





Online charts and graphs

How to do various things with images and video (on Windows)

How to do various things with images

  1. How to do screen capture:
    1. PrintScreen (whole screen) or Alt-PrintScreen (active window)
    2. Microsoft Photo Editor
    3. Paste as new image
    1. Print Screen or Alt-PrintScreen
    2. Microsoft Paint
    3. Paste
    1. ArcSoft PhotoStudio
    2. File - Capture - Desktop
    3. Click on window you want to capture

  2. How to Crop in Microsoft Paint:
    1. Move mouse to bottom RHS corner and note (in status line) pixels Width,Height
    2. Image - Attributes - (Enter pixels Width and Height)

  3. How to write a line of text on top of an image:
    1. Microsoft Paint: "A" icon.
    2. Pick icon for transparent / not-transparent.
    3. Pick color.
    4. Pop-up gives font, size, etc.
    1. HTML and CSS. Make a div with a background-image and write text in the div.

  4. How to generate an icon with words in it:
    1. Write in HTML and do screen capture

  5. How to draw straight lines (e.g. boundary of a property):
    1. Microsoft Paint
    2. Shapes - line
    3. Size and Color

  6. How to scan a document that is larger than A4 (or whatever limit your scanner has)
    1. Do multiple small (e.g. A4) scans until you have covered the whole document with overlapping images.
    2. Image stitching software - Microsoft Image Composite Editor
    3. Just drag and drop the multiple small scans onto it. It figures out the overlaps automatically and creates one huge image.

  7. How to convert (a color map say) to black and white
    1. Microsoft Photo Editor
    2. File-Properties-Greyscale
    3. save as JPEG

  8. How to convert transparent-background PNG (e.g. color icon) to greyscale:
    • Can be tricky not to lose the transparency.
    • Online editor Lunapic seems to work.

  9. How to make transparent:

How to highlight (say text, or places on a map) in yellow


How to do screen capture from video

  1. How to do screen capture from video:

  2. How to do screen capture from Windows Media Player:
    1. Ctrl-I saves current frame as JPG

  3. How to do screen capture from QuickTime:
    1. Play inside IE browser and PrintScreen screen capture as normal.

  4. How to do screen capture from RealPlayer:
    1. Tools - Preferences - Hardware - Video card compatibility - Most reliable
    2. PrintScreen screen capture

  5. How to do screen capture from other video:
    1. MPUI - press "S" to grab screenshot

How to Rotate video

How to Light adjust video







How to get Windows Photo Viewer back in Windows 10


How to


multiple desktops




Text editors




Web browsers


ASCII and other characters

Printing web pages


light versions of red, green, blue:

This is bgcolor=#ffcccc
This is bgcolor=#ccffcc
This is bgcolor=#ccccff
This is bgcolor=#ffdddd
This is bgcolor=#ddffdd
This is bgcolor=#ddddff
This is bgcolor=#ffeeee
This is bgcolor=#eeffee
This is bgcolor=#eeeeff

light versions of cyan, magenta, yellow:

This is bgcolor=#ccffff
This is bgcolor=#ffccff
This is bgcolor=#ffffcc
This is bgcolor=#ddffff
This is bgcolor=#ffddff
This is bgcolor=#ffffdd
This is bgcolor=#eeffff
This is bgcolor=#ffeeff
This is bgcolor=#ffffee

light grey:

This is bgcolor=#cccccc
This is bgcolor=#dddddd
This is bgcolor=#eeeeee

ancientbrain.com      w2mind.org      humphrysfamilytree.com

On the Internet since 1987.      New 250 G VPS server.

Note: Links on this site to user-generated content like Wikipedia are highlighted in red as possibly unreliable. My view is that such links are highly useful but flawed.