2. FUNDAMENTALS OF DIGITAL CAMERA 2003. 05. 29 Ahn Hyun Sang

3. Characteristics -Comparison with Film Camera 1)No Film - Using CCD and Memory Media instead of Film. 2) Instantaneousness - Having LCD panel on their body. 3)Unchangeable - Picture Information is recorded in Digital type. 4)Easily-Controllable -Enable the user to make some effects after taking the shot.

4. Signal Processing LightFilterLens Buffer Memory Media CCD Image Processing A/D Converter

5. CCD CCD(Charge Coupled Device) -Same as the film of a film camera. -The light is transformed to electric signal on CCD -CCD only analyze the strength of the light

6. Color Filter -To find the information about the color of the light, 3 color filters are located between lens and CCD. 1)RGB filter -The color expression is natural but the image sharpness is poor. 2)CMY filter -The image sharpness is good but the color expression is bad. Red = Yellow + Magenta Green = Yellow + Cyan Blue = Magenta + Cyan

7. Pixel and Resolution Pixels of Digital Camera’CCD =Resolution of X-axis * Resolution of Y-axis Example) If the Resolution is 1600*1200 Then we call the digital camera as 2 Mega Pixel Camera. (because 1600*1200=1920000)

8. Lens -Bright Lens and Dark Lens F number(=aperture value)= f/A (f=focal length, A=diameter of aperture opening) F number high -> Dark Lens F number low -> Bright Lens -Optical and Digital zoom Optical Zoom: Truly magnifying the image by using the combination of lens to control the focal length. Digital Zoom: Non-true magnifying the figure. It magnifies the image by using software.

9. Storage Media Flash Memory CF(Compact Flash) : Canon, Nikon, Samsung SM(Smart Media) : Olympus, Fujifilm MS(Memory Stick) : Sony ETC MD(Micro Drive) Floppy Disk CD-R CD-RW

10. References Books 보고, 찍고, 보고 ! 디지털 카메라 - 교학사 PC 사랑 5 월호 HOW PC 5 월호 WEB-SITES