CopyDot Scanner's Role and Skills in Image Processing
First, the role of CopyDot scanner
Broadly speaking, CopyDot dot-split copy scan technology is a technology for true reduction of manuscripts that have been linked to a web. It can use a sufficiently high resolution to reproduce the smallest dot on a linked web original, and dot loss can be negligible. , which can maximize the reproduction of the original.
Scanners with the "CopyDot" function scan text, lines, and images on film to generate dots on the film. This mainly has the following effects:
(1) Convert the mesh color separation film into a digital file in a highly streamlined manner to reduce the use of foreign films, archived films, or reflections.
(2) The information on the film can be integrated into the imposition, grouping, and the entire digital workflow after being digitized. The problem of overprint due to the long preservation time, repeated use, or the large format of the film is solved for multi-coloured films. .
(3) The scanning software aligns the color separation film by moving or horizontally by automatically recognizing some details that the registration mark or the image separation film has at the same time, and the registration work is automatically completed during the scanning process.
(4) Quality problems caused by yellowing of the film and scratches, creases, etc. can also be repaired by a dot-copy scanner.
Second, CopyDot scanner tips
The author used Creo company's Renaissance II - vertical roller dot copy scanner. There are some experiences in the actual production process, which is the use of CopyDot dot-copy scanners, which are summarized for your reference.
(1) Before scanning a document, test and calibrate it with a standard document in advance. It is the adjustment and calculation of the current environment and lens focal length. This step is very important.
(2) It is also important to maintain the cleanliness of the original film and rollers during daily use of the CopyDot dot copy scanner. Excessive dirt, band marks, and scratches on the original will affect the scanning quality of the original film, while increasing the workload of the back-end dirt removal personnel.
(3) The degree of reduction of the dots and the filtering condition of the moiré and the parameter setting before the scan are very important. Therefore, the resolution of the scanned manuscript is generally the same as the resolution of the output of the rear end illumination.
(4) The back-end RIP software determines the front-end scan. If the back-end RIP software has the option of using the file screening system, it is best to use it. If there is no RIP parameter at least, the dot shape must be the same as the original dot shape.
(5) Considering the factors of remote edition, the general file storage cannot be too large, and the resolution can generally be set to 1200dpi (newspaper) or 2540dpi (hardback book).
(6) Regardless of whether the photocopying system or the CTP system, the curve adjustment of such files at the back-end RIP (netpoint restoration curve) is not very effective, so the adjustment curve should be completed in the CopyDot dot-copying scanner software to ensure the network points The exact reduction.
(7) Roller dot dot copy scanners do not work continuously. According to the design principle and the author's work experience scanners work continuously for more than 12 hours, it is prone to the phenomenon that the scanned dots are not true, and the more serious dots are broken like snowflakes. It is therefore recommended to pause the scan for at least 2 to 3 hours in order to reduce the excessive temperature in the drum. First, the role of CopyDot scanner
Broadly speaking, CopyDot dot-split copy scan technology is a technology for true reduction of manuscripts that have been linked to a web. It can use a sufficiently high resolution to reproduce the smallest dot on a linked web original, and dot loss can be negligible. , which can maximize the reproduction of the original.
Scanners with the "CopyDot" function scan text, lines, and images on film to generate corresponding data on the dots on the film.
This mainly has the following effects:
(1) Convert the mesh color separation film into a digital file in a highly streamlined manner to reduce the use of foreign films, archived films, or reflections.
(2) The information on the film can be integrated into the imposition, grouping, and the entire digital workflow after being digitized. The problem of overprint due to the long preservation time, repeated use, or the large format of the film is solved for multi-coloured films. .
(3) The scanning software aligns the color separation film by moving or horizontally by automatically recognizing some details that the registration mark or the image separation film has at the same time, and the registration work is automatically completed during the scanning process.
(4) Quality problems caused by yellowing of the film and scratches, creases, etc. can also be repaired by a dot-copy scanner.
Second, CopyDot scanner tips
The author used Creo company's Renaissance II - vertical roller dot copy scanner. There are some experiences in the actual production process, which is the use of CopyDot dot-copy scanners, which are summarized for your reference.
(1) Before scanning a document, test and calibrate it with a standard document in advance. It is the adjustment and calculation of the current environment and lens focal length. This step is very important.
(2) It is also important to maintain the cleanliness of the original film and rollers during daily use of the CopyDot dot copy scanner. Excessive dirt, band marks, and scratches on the original will affect the scanning quality of the original film, while increasing the workload of the back-end dirt removal personnel.
(3) The degree of reduction of the dots and the filtering condition of the moiré and the parameter setting before the scan are very important. Therefore, the resolution of the scanned manuscript is generally the same as the resolution of the output of the rear end illumination.
(4) The back-end RIP software determines the front-end scan. If the back-end RIP software has the option of using file screening system, it is best to use it. If there is no RIP parameter at least, the dot shape must be the same as the original dot shape.
(5) Considering the factors of remote edition, the general file storage cannot be too large, and the resolution can generally be set to 1200dpi (newspaper) or 2540dpi (hardback book).
(6) Regardless of whether the photocopying system or the CTP system, the curve adjustment of such files at the back-end RIP (netpoint restoration curve) is not very effective, so the adjustment curve should be completed in the CopyDot dot-copying scanner software to ensure the network points The exact reduction. Work more than 12 hours, it is easy to appear the phenomenon of false points out of the scan, the more serious point of the network broken like snowflakes. It is therefore recommended to pause the scan for at least 2 to 3 hours in order to reduce the excessive temperature in the drum.
Of course, the CopyDot dot-copy scanner works with the Copydot Toolkit software and is even more powerful. The file formats they generate or export are supported by a wide variety of software on the market today. Such as TIFF, EPS, DCS1, DCS2M, DCS2S, PCC, EskoDDS, Handshake, PDF, SMD, AD, PSI and so on.
The function will be more powerful. The file formats they generate or export are supported by a wide variety of software on the market today. Such as TIFF, EPS, DCS1, DCS2M, DCS2S, PCC, EskoDDS, Handshake, PDF, SMD, AD, PSI and so on.