Here's why:
* Pixels are digital units. They represent the smallest unit of information in a digital image.
* Resolution determines the pixel density. A higher resolution means more pixels per inch (PPI) or per centimeter (PPC), resulting in a more detailed image.
* A4 paper has a fixed physical size. It's 210mm x 297mm (approximately 8.27 inches x 11.69 inches).
To figure out the pixel size of an A4 sheet, you need to know the desired resolution:
* Example: If you scan an A4 sheet at 300 PPI, the image will be 2481 pixels wide x 3505 pixels tall. This is calculated by multiplying the physical dimensions by the resolution:
* Width: 8.27 inches * 300 PPI = 2481 pixels
* Height: 11.69 inches * 300 PPI = 3505 pixels
Common Resolutions:
* 72 PPI: Often used for web images.
* 150 PPI: Suitable for print at a smaller size.
* 300 PPI: Standard for high-quality print.
Therefore, an A4 sheet can have many different pixel sizes depending on the resolution used.
