- The word "Pixel" invented from "Picture Element".
- A pixel is smallest portion of a digital image or graphic that can be displayed and represented on a digital display devices.
- All raster images are made using the pixels only.
- The size of the pixel is depend on the how you set the resolution for the display screen.
- The number of pixels in a image is called Resolution.
- The pixel resolution determines the quality of display, more pixels per inch of monitor screen yields better image result.
- Each pixel stores color information for your image.
- It will usually store it in either three components, known as RGB(Red, Green, Blue), or four components, known as CMYK(Cyan, Magenta, Yellow, Black).
- The number of distinct colors that can be represented by a pixel depends on the number of "bits per pixel(bpp)".
- A 1 bpp image uses 1-bit for each pixel. Each additional bit doubles the number of colors available.
- For Example:
- 1 bpp, 21 = 2 colors
- 2 bpp, 22 = 4 colors
- 3 bpp, 23 = 8 colors
- n bpp, 2n colors
Calculating Megapixel:
- A Megapixel is a million of pixels.
- Multiplying an image pixel width by it's pixel height gives the resolution of the image.
- Example: take 21 Megapixel
- 5616(pixel wide) x 3744(pixel tall) =21,026,304 pixels approximately 21 million pixels (21 megapixels).
- Large (3072 x 2304 pixels) = 7 megapixels
- Medium (2048 x 1536 pixels) = about 3 megapixels
- Small (640 x 480 pixels) = 0.3 megapixels.
Examples for Pixel:
