Digital Photographyand photo manipulation

Richard Hine

Digital photography and image manipulation

I can Appreciate the differences between digital and optical cameras and the advantages of the digital photography processTake digital photographsUnderstand the use and limitations of the flash (useful distance, red eye reduction etc)Understand image size / qualityTransfer images from a camera to the computer either through cable or a digital card readerAppreciate the differences between bitmap and vector graphics and their uses and limitationsRecognise common bitmap formats Understand the use of common paint tools, paintbrush, aerosol, eraser, clone brush and selection tools.Select appropriate image resolution for printed and computer output. Understand memory verses image quality issues.Crop imagesResize imagesChange image quality depending on use. Including memory verses image quality issues.Be able to save images in different formats to preserve quality or save memoryRemove scratches / red eye or use sharpen / blur (on selected areas and whole image)Understand how to adjust the transparency of a layerUnderstand how to alter colour values (hue, saturation, lightness) Adjust contrast and or brightness to improve on screen and printed appearanceAppreciate the differences in paper types for producing digital photograph output

Optical Camera

                                                                                  

                                                              

How does an optical camera work

                                                                               

                                                                 

How does an optical camera focus

                                                                          

                                      

Out of focus?

                                                                                     

                                                           

Aperture

Changing the aperture

                                                                                           

                                                     

Digital cameras

                                            

                            

Using the flash

• The flash illuminates an object

• The light bounces back off the object

• The reflected light enters the camera

• Until the shutter closes

Using the flashThe background is dark because the light did not have enough time to reflect back to the camera before the shutter closed.

If the shutter is held open longer (manual mode only) more of the background will become visible. The foreground can become too light though.

Red Eye

• This happens when the flash is used.

• Light is reflected by the retina (the back of the eye)

• The retina is red (lots of blood vessels!!)

Red Eye

Red Eye

This has used very basic digital manipulation, but it is very difficult to do well, notice the dog.

Red Eye

• Cameras use multiple flashes to close the iris before the picture is taken

• This reduces reflection from the retina

• This should eliminate red eye.

Depth of field

Large aperture, cards out of focus

Small aperture, most cards in focus, greater depth of field

Framing a photo

• Framing a photo can be the difference between a great photo and a rubbish one.

• Where is the point of interest?

• What will the viewers eyes do?

• What can you do about it?

Dead centre

• Object centre• Just a snapshot

Rule of thirds

Rule of thirds

Eye movement

Framing

This picture shows the frames only as an idea

Framing

Important

• There is no right and wrong!!!!!!

• You decide what works

• Why always take photos standing up at eye level?

• Try to vary things.