Digital Photography

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Digital Photography. Agnieszka Piekarska and Łukasz Trzciałkowski. Digital Photography. History. - Photography was invented in 19th century. - 1963 - student at Stanford University invented a videodisk camera - disadvatages of traditional photography. Digital Photography. - PowerPoint PPT Presentation

Transcript of Digital Photography

Stan projektua videodisk camera
- limited access to laboratories;
- you have to process all your photos and file them all
together because they are all on one roll of film;
- photos must be processed before you can view them;
- image quality can be poor if you use fast films or do
not take care in how you take pictures;
- necessity of scanning photos before computer
One of the first digital cameras !!!
SONY ProMavica MVC-5000
The camera was attached to a PC to transfer images.
Digital Photography
built-in transmission capabilities
photos on location
The first digital camera to offer both still and moving image
and sound recording/reproduction
Digital Photography
output personal moving pictures
to a personal computer
in the MPEG format.
Flash lamp - is a special lamp which illuminate places and things when we took a picture.
Viewer – we can see a display frame of taking picture when we look in viewer.
Self timer diode – it blink when camera is set with self timer. (Self timer afford to put camera in some place and get self-photo)
Lens – it allows to zoom in and zoom out objects in photo without changing distance of it. Lens consist of lens group and lens barrel.
LCD Viewer – digital screen. It is used to preview photos (by pressing Preview button) and to set the best view of photo when we took it.
Menu buttons – they are used to move in menu or to scroll photos in preview.
Power switch – when we switch it the lens will slide in and slide out. LCD Screen is turning on and camera is ready to took some photos.
Agnieszka Piekarska & ukasz Trzciakowski
Building of Digital Camera
Digital Camera is powered by small rechargable batery, and pictures are stored on memory card, which is built-in or is removable. Every card has different storage capacity like 16MB 32MB 64MB 128MB or even 512MB.
To take one picture in 1600x1200 resolution we need about 1MB of memory, if resolution is smaller then picture waight less. e.g.
to keep 32 photos on 16MB MEMORY CARD we need to set resolution in our camera like 1024x768 if resolution is set 640x480 this amount is growing to 80 photos. So we can see that if quality is small then we can do keep more photos, we need to chose… good look or amount…
Agnieszka Piekarska & ukasz Trzciakowski
How does it work?
To make good picture we need to have good camera and good light, if objects which we are going to pohotograph is not illuminate enough, then picture will be in poor quality.
When we have good light then we can start taking photos. So how does it realy works ? Let see…
The light focused in lens is falling on a CCD (Changed-Coupled Device) Matrix which consist of milion light-sensitive cells. These cells electrify in different way depending on range of visible light.
Agnieszka Piekarska & ukasz Trzciakowski
Agnieszka Piekarska & ukasz Trzciakowski
How Much Compression?
the more information is lost !!!
Agnieszka Piekarska & ukasz Trzciakowski
Resolution - number of pixels (or dots)
displayed per inch (ppi or dpi).
The photo on the left was shot at a higher-resolution setting than the one on the right.
Agnieszka Piekarska & ukasz Trzciakowski
Most digital cameras store images in one of three formats:
pronounced "jay-peg"
(JPEG File Interchange Format)
uses a lossy compression scheme;
supports 24-bit color.
pronounced "tiff"
scanners, frame grabbers, and photo editing programs;
a popular format for desktop publishing applications;
TIFF files support up to 24-bit colors.
Agnieszka Piekarska & ukasz Trzciakowski
raw, unprocessed data;
on a powerful desktop computer.
Agnieszka Piekarska & ukasz Trzciakowski
Transfer images to PC
To transfer images to PC we need to use USB cable
connection, or flash memory…
Agnieszka Piekarska & ukasz Trzciakowski
We also need program which can store and arganize our
galeries. It is usually included on CD with drivers to
USB Cable.
Transfer is fast and after succesful copy photos to disk
all photos are erased from memory card.
Agnieszka Piekarska & ukasz Trzciakowski
The original image has too much dark space around the center of interest.
Cropping, cuts out the dark areas, leaving just the interesting part of the image.
Agnieszka Piekarska & ukasz Trzciakowski
Sharpened image.
The horizon line in front of the mountains is slightly tilted
as is the tall cactus in the foreground.
The rotation command has been used to level the image.
Agnieszka Piekarska & ukasz Trzciakowski
The original image has a gray cast to it.
By adjusting color balance, the image is given a more surrealistic look.
Agnieszka Piekarska & ukasz Trzciakowski
like a watercolor painting.
Agnieszka Piekarska & ukasz Trzciakowski
Agnieszka Piekarska & ukasz Trzciakowski
original image (left) and a variation (right).
When you score the variation,
its attributes are applied to the original image.
Agnieszka Piekarska & ukasz Trzciakowski
Digital Photography
Advantages & Disadvantages
+ We can preview photo in any time we want without using special laboratories
+ We can use computer to correct some scratches in our photos
+ We can make many fotos, watch them and erase for free
+ We can send photos via e-mail imediately after we took it.
+ If we have large storage capacity memory card we can make many photos without changing a film
+ If it’s necessary we can repeat our photography
Digital Cameras are more expensive than traditional stuff (memory card, camera, bateries)
Durability of ink-jet printout is lower than traditional photos
Resolution of digital camera is still lower than traditional 35mm films.
Agnieszka Piekarska & ukasz Trzciakowski
If we look in near future we can predict that digital photography dominate traditional ways of making photos.
Cameras and stuff prices will be decrease, and all these gear will be cheaper.
Probably someone invent that kind of photo storage which will be more durable than CD’s and normal paper.
Cameras will be also smaller and quality of pictures will be better
Typical cameras will be used by our grandparents and parents but new generation do not expire: „What is traditional photography…”
Agnieszka Piekarska & ukasz Trzciakowski