Pixels to Pictures
Introduction 3 steps
Introduction 3 steps
1 pixel
Hexadecimal Red-Green-Blue Colors from 0-255 17 million colors More pixels = better Two parts of a file Overview Options Pixel positions Pixel values Brightness Brightness example Contrast Contrast example Color Color example ND grad Sharpen Blur Acquiring an image Scanners Scanner specs Resolution Bit depth & DMAX Other Digital cameras Sensor types Digicam pixels Four into one Interpolation More sensors Print size Output What is resolution? Dots vs. pixels Printer resolution Output resolution Print size 2 Enlarging Formats Conclusion Links Software
PART I: Digital Images in the Computer
What IS a pixel?
Pixel is short for Picture Element
It's the "atom" of digital imaging: The smallest possible unit of a digital image.
 |
- It's two dimensional
- It has no inherent height or width (it can be any size)
- It has no inherent shape (though image editing software renders it as square)
- It's all one color
- It can be any color
(There are, by the way, other definitions of "pixel" which can cause some confusion. More on this later...)
