Kuvaskannaus

Kuvaskannaus, often translated as image scanning or picture scanning, refers to the process of converting a physical image, such as a photograph, document, or artwork, into a digital format. This is typically achieved using a scanner device. The scanner captures the visual information of the physical object and transforms it into a digital file that can be stored, viewed, edited, and shared on electronic devices.

The fundamental principle behind kuvaskannaus involves light. A light source within the scanner illuminates the surface of the image. As the light passes over the image, it is reflected or absorbed differently by various colors and tones. A sensor, often a Charge-Coupled Device (CCD) or Contact Image Sensor (CIS), detects these variations in reflected light. This sensor then converts the light intensity and color information into electrical signals, which are subsequently processed and digitized by the scanner's software.

The result of kuvaskannaus is a digital image file, commonly in formats like JPEG, PNG, or TIFF. The quality of the scanned image depends on factors such as the resolution of the scanner (measured in dots per inch or DPI), the color depth, and the accuracy of the color reproduction. Higher resolutions capture more detail, while greater color depth allows for a wider range of colors and subtle tonal gradations. Kuvaskannaus is widely used in various fields, including archiving, digital art, document management, and personal use for preserving memories.