You will need to have an idea of the resolution of the picture to change this through your photo software.
It is the same. 1 dot is also 1 pixel.
Depends of the number of pixels per centimetres or inch (Ppi- pixel per inch).
14 grams per micron
Photoshop supports a maximum pixel dimension of 300,000 by 300,000 pixels per image.
The equivalent pixel resolution of an image at 300 dpi is 300 pixels per inch.
To calculate the pixel size of an image, you need to divide the width or height of the image in pixels by the physical size of the image in inches. This will give you the pixel size per inch.
Most land areas in Google Earth are covered in satellite imagery with a resolution of about 15 meters per pixel and highest resolution is about 1 inch per pixel.
The pixel size for a piece of paper varies depending on the resolution of the image and the size of the paper. For example, a standard letter-size paper (8.5 x 11 inches) at 300 pixels per inch resolution would be 2550 x 3300 pixels.
Pixel: This is the smallest building block of your screen. Resolution: This is refers to the size of the pixel. The smaller the pixel, the higher the resolution. ... PPI: (or Pixels Per Inch) This is the number of square pixels that show up in an inch of a digital screen. Also, more often commonly misused in place of DPI.
To convert centimeters to pixels, you need to know the pixel density (DPI, or dots per inch) of the device you are using. A common DPI setting is 96 DPI, which means there are approximately 37.8 pixels in a centimeter. Therefore, 3.5 cm would be approximately 132 pixels at 96 DPI (3.5 cm x 37.8 pixels/cm). Adjust the conversion based on your specific DPI setting for accurate results.
A pixel usually has a known size, and there are many ways to figure it out. If it is a printed pixel, then it probably has a resolution of 300 or 600 dpi (or higher!), where dpi = dots per inch. So a 300 dpi pixel = 1/300 inches. To convert inches to centimeters, multiply by 2.54. So... a 300 dpi pixel = 1/300 inches = 1/300*2.54 cm = 0.00847 cm For a computer monitor pixel, if you don't know your monitor's dpi, you can measure the width of your screen in centimeters (for example, mine is 40 cm wide... be careful, most monitors are sold using a diagonal dimension). Then, figure out the maximum horizontal resolution of the monitor (look in your user guide if you don't know, but for example, let's say 1600 pixels). The pixel size is then (40/1600) cm = 0.025 cm
To transmit an 8 by 10 inch image over an ISDN B channel with 300 pixels per inch and 4 bits per pixel, calculate the total number of pixels in the image: 8 (inches) * 300 (pixels/inch) * 10 (inches) * 300 (pixels/inch) = 7,200,000 pixels. With 4 bits per pixel, the total number of bits required would be 7,200,000 * 4 = 28,800,000 bits. Convert this to bytes by dividing by 8, giving us 3,600,000 bytes or approximately 3.43 MB for transmission.