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to get over from the world of paper documents in the world of the digital information, the scanner is required. This car can bring the big advantage at typing, and for numbering of images and at all is irreplaceable. The test laboratory of magazine " was engaged in studying of merits and demerits of different models of scanners; Money “. The tester Evgenie Lyubarsky worked with “ iron “. Vladislav Dorofeyev contacted To suppliers . Results were analyzed by Igor Pitchugin.
That We tested
asked suppliers to send tablet scanners of format A4 which is belonging to the class personal or office, with interface connection on universal tyre USB on the test. We also warned that additional options, such as the block of automatic feeding of a paper or a slide - the module for film scanning, we will specially not test. We tried to catch on the test devices of eight most popular marks in the market to have fuller picture. Unfortunately, on the test and scanners Agfa, Umax and Microtek which are considered as the most qualitative have not got. Besides, we expected to receive from suppliers on three scanners of each mark from different price ranges: to $100, from $100 to $200 and over $200. From 24 scanners planned on such scheme on the test has arrived 18.
On the internal device scanners essentially differ, perhaps, only type of a used light source and a reading out photo cell. The fluorescent lamp serves in the majority of devices as a light source, and the image is read out by matrix CCD. In other models for this purpose light-emitting diodes and gauge CIS are used. Scanners on light-emitting diodes are more compact, consume energy less and is cheaper, but from - for low intensity of a light stream speed of scanning decreases and the noise level on the received image increases. Besides, non-uniformity of a spectrum of light radiated by light-emitting diodes worsens quality of a colour rendition. The powerful fluorescent lamps possessing a uniform spectrum of radiation, provide a good colour rendition and higher speed of scanning, but they have also lacks - the raised power consumption and long (till 30 seconds and more) time which is required for warming up a lamp at inclusion of the device in work.
to the Objective estimation (measurement) two characteristics of the scanner - actual resolution and accuracy of a colour rendition give in. For check of that, resolution how much declared by the manufacturer corresponds valid, special photographic scales are used (the alternating it is black - the white lines decreasing on a thickness). The place where lines of the scanned image of a scale start to merge, and defines the maximum resolution of the scanner. However to find such scale it has appeared business rather uneasy, therefore the tester had to be limited to value judgment of quality of the image (an estimation 2). It compared a colour photo to its scanned image on the monitor, paying attention to such moments, as accuracy of a colour rendition and width of a dynamic range (how much well the scanner transfers gradation of light and dark sites of the image).
But to a tester it was possible to measure and estimate accuracy of a colour rendition absolutely objectively. The special table (in professional language " is for this purpose used; a colour target “) With the colour rectangles printed with factory way. At first a colour target have measured spektrofotometrom and have received reference figures in format Lab then the target was scanned on all scanners. The received images were loaded in Photoshop where the colour table can be seen in format Lab and to compare to the standard. The deviation from reference value less, the better the scanner transfers colours. This deviation is counted on 5 - a mark scale and appears in our tables as an estimation 1.
Besides, for each scanner the tester spent even on four measurements. With a stop watch in a hand it measured time of performance by them of various problems. First of all, it studied, what is the time it is required to the device for calibration (self-adjustment before performance of procedure of scanning) and for a warming up of a fluorescent lamp (for scanners on light-emitting diodes it is possible to consider this time equal to zero). It is important enough characteristic of the scanner on which convenience of work with it depends. Agree, to wait for 8 seconds or 2 minutes until when the device will start directly scanning procedure, it is far not same. The measured time necessary for preparation of the scanner to work, is counted on 5 - a mark scale and makes an estimation 3.
the Estimation 4 (double) is exposed to tested devices for speed. As a rule, it is necessary to scan either text documents, or photos. Thus it is possible to choose different parametres of scanning. For the experiences the tester used the text document on a sheet A4 and switched the scanner to a mode 8 - bit gradation grey with the permission of 300 points to inch (an optimum mode for the further processing by the program of recognition of the text), and also a colour photo 10x15, switching the device on 24 - a bit colour mode with the permission of 600 points to inch. Also measured scanning time.
One more value judgment (the estimation 5) was exposed for design, ergonomics and convenience of work with the scanner. Here the tester estimated, how much simply to connect the device and to establish on it the software necessary for work. He also paid attention that is included into the complete set ON: whether only drivers or still any useful programs which besides actually scanning allow to carry out other operations with the text or the image. An estimation incorrect russification of the applied software or absence reduced that. For the user of personal or office scanner possibility of dialogue with the device in Russian has important value. The general point was deduced as an average arithmetic all estimations.
one more parametre for comparison - scanner retail price.
in tables we also have resulted the basic technical characteristics of scanners: The optical permission declared by the manufacturer, depth of colour, dimensions and weight.
that has turned out
As a whole is better scanners Epson (in absence, we will remind, devices Agfa, Umax and Microtek which are considered as the most qualitative) have proved. Good models are in an arsenal and other marks which have got to the test.
in group of the cheapest devices it is possible to allocate models Mustek BearPaw 1200CU Plus on light-emitting diodes ($51) and Genius ColorPage - HR6X Slim with built in a slide - the module ($90), received an identical estimation. But in the first scanner ON it is not Russified, and in the second russification is incorrect. Convenient, beautiful and qualitative enough machine - CanoScan LiDE 20 on light-emitting diodes ($85), but is very long calibrated (130 seconds), as has led to decrease in its estimation.
in average price group we will note two models Epson - Perfection 1660 Photo with built in a slide - the module ($185) and Perfection 1260 ($112). However, at the second model a problem with speed: on scanning of sheet with the text 120 seconds are required. The graceful design and decent characteristics allocates HP ScanJet 3570C with built in a slide - the module ($153).
In group of expensive devices out of competition model Epson Perfection 2400 Photo with built in a slide - the module - the highest in the test an estimation and the lowest in this group the price ($227). We will note excellent speed CanoScan D2400U ($334) - 15 seconds on scanning of the text and 22 seconds on a photo (it is a pity that is not Russified ON). The device of giving of documents in model HP ScanJet 5550C makes heavier not only the device, but also its price ($434). The car for office: quickly copes with the text (18 seconds) and much more time spends for scanning of photos (52 seconds).
the Test of scanners