How to detect the effect of a scanner

With the rapid development of multimedia and network technology, people are no longer satisfied with the common text information exchange. Image this simple and intuitive information media has always been the best way to communicate information, scanner, as the fastest, convenient and inexpensive input device for image input, has always been the first choice for digital image input, especially with the advent of the multimedia information age, the application field of scanners is also gradually expanding, whether in Office applications, home Entertainment, Multimedia production, Internet applications can see the figure of the scanner.

While many people are buying scanners, all like to stay in the scanner's various theoretical indicators, and ignore the effect of the scanner test, resulting in the purchase of the scanner and can not play the role of the application, so the scanner on-site effect detection should be a necessary part of the purchase of scanners. So as our ordinary users in the end how to test the scanner in the field, the following is its specific detection steps:

1, first to find a black handwriting with a white paper as a scanning object, and put the side of the word toward the flat glass, and then start scanning software, in the software settings interface of the scanning mode to choose "Black and white" scanning mode, so that the scanner will be in accordance with 1 bits to represent black and white two kinds of pixels; At the same time, in the scanning settings interface resolution options, the scan resolution is adjusted to 300dpi, because this resolution is normally processed in ordinary documents when the general resolution;

2. After setting up the above two parameters, let the other parameters all use the default value, and then directly start scanning, and do not first sweep, the purpose is: to see the scanner in the context of the outside settings, only to use their own adjustment to adapt to the ability, in the end can scan what kind of manuscript out;

3, after scanning, we carefully analyze the scanner in the default state of the scanning effect. If the scanned document is very close to the original document, which means that the black handwriting in the original document is clearly scanned, and you don't see or see other noise stains on the white background of the document, the scanner has a strong adaptive scanning capability, If the scanned manuscript in the white background produced a lot of hemp points, and the manuscript itself is relatively vague, it reflects the scanner does not have the ability to adapt to the paper, each scan will spend a lot of time to adjust the effect of the scan, will greatly reduce the efficiency;