Certified Professional Photographer (CPP) Practice Exam

What does PPI stand for in digital imaging?

1. Pixels Per Inch

2. Pixels Per Image

3. Dots Per Inch

4. Digital Pixels Image

The correct answer is: Pixels Per Inch

PPI stands for Pixels Per Inch, which is a measurement that indicates the pixel density of a digital image. It describes the number of individual pixels that are contained within a specific area, typically one inch. This measurement is crucial for understanding image resolution, as it directly impacts the clarity and detail of the image when displayed or printed. A higher PPI value means more pixels are packed into each inch, resulting in a sharper and more detailed image. Understanding PPI is essential for photographers and graphic designers who aim to achieve optimal image quality for various outputs, whether for print or digital display. The other terms listed do not correctly represent PPI. Pixels Per Image refers to the total number of pixels in an entire image, which does not reflect density but rather quantity. Dots Per Inch (DPI) is a similar concept used primarily in printing to describe the resolution, but it is not interchangeable with PPI as it relates to how printers operate rather than digital images themselves. Digital Pixels Image does not represent a standardized term in digital imaging. Therefore, understanding that PPI specifically focuses on the relationship of pixels to physical dimensions in an image is key to its correct identification in digital imaging contexts.