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Deskew and photos on a document scanner
Hi all,
I am looking for a documentscanner to archive many documents. Some of these are regular lettersize, others are thin paper @ 1/3rd letter size, abt 10.000 are indexcard sized cardstock(thick paper), color handwritten and printed pictures which all have just a bit different size - no two are the same. Many documents have information on both sides sometimes with stickers pasted on them. All this makes for a wide range of documents to process with challenges to get the quality somewhat right. I started archiving using my trusty old HP 5370 with Vuescan which works well as long as I am careful in how I put the pages but it is way to slow in getting everything scanned and filed during my lifetime without giving up living a life. So now that documentscanners have reached a reasonable pricepoint I am considering purchasing one and archiving more so the original documents can be boxed and stored away from prime-space. After searching various sites and reviews I had decided to check into the Kodak I-1220 duplex scanner over the Canon DR-2580 and the Fujitsu FI-5120 because of the praised feeder, image quality and ability to scan plastic cards. I tested one (on the cardstock, different sizes) but found that the ADF did not pull all documents straight through. The deskew option could straighten this up though, however it cut off parts of the top/bottom images - or maybe those parts were never scanned. I am not quite sure why and the store did not have a good explanation. I assume this is because the scanner only scans when the paperrollers detect paper. Because the paperrollers are "somewhat" in the middle of the scanner when paper is skewed a corner of the paper would already be past the roller and at the end the final corner would not be scanned yet (hopefully you understand what I mean here). The result is that sometimes the corners of documents are not in the scanned image. These corners do however hold part of the information needed. I was truly disappointed by what I saw or maybe my expectations were too high and this is the state of current technology... Now my questions: Is this phenomenon a driver issue which can be corrected - if so how? - or is this a hardware issue which cannot be corrected? Do all ADF document scanners in this pricerange have this problem or are the Canon or Fujitsu better in this regard? Are there any other scanners which don't have this problem - they need to be able to scan thick postcards? Do (affordable) flatbed scanners exist with a duplex option (without ADF) with enough scanning speed? Is there some forum besides the newsgroup where these questions would be more appropriate? Thanks in advance for reading this, sharing your thoughts and answering my questions! Joe. |
#2
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Deskew and photos on a document scanner
Joe none@nowhere wrote in
news Hi all, I am looking for a documentscanner to archive many documents. Some of these are regular lettersize, others are thin paper @ 1/3rd letter size, abt 10.000 are indexcard sized cardstock(thick paper), color handwritten and printed pictures which all have just a bit different size - no two are the same. Many documents have information on both sides sometimes with stickers pasted on them. All this makes for a wide range of documents to process with challenges to get the quality somewhat right. I started archiving using my trusty old HP 5370 with Vuescan which works well as long as I am careful in how I put the pages but it is way to slow in getting everything scanned and filed during my lifetime without giving up living a life. So now that documentscanners have reached a reasonable pricepoint I am considering purchasing one and archiving more so the original documents can be boxed and stored away from prime-space. After searching various sites and reviews I had decided to check into the Kodak I-1220 duplex scanner over the Canon DR-2580 and the Fujitsu FI-5120 because of the praised feeder, image quality and ability to scan plastic cards. I tested one (on the cardstock, different sizes) but found that the ADF did not pull all documents straight through. The deskew option could straighten this up though, however it cut off parts of the top/bottom images - or maybe those parts were never scanned. I am not quite sure why and the store did not have a good explanation. I assume this is because the scanner only scans when the paperrollers detect paper. Because the paperrollers are "somewhat" in the middle of the scanner when paper is skewed a corner of the paper would already be past the roller and at the end the final corner would not be scanned yet (hopefully you understand what I mean here). The result is that sometimes the corners of documents are not in the scanned image. These corners do however hold part of the information needed. I was truly disappointed by what I saw or maybe my expectations were too high and this is the state of current technology... Now my questions: Is this phenomenon a driver issue which can be corrected - if so how? - or is this a hardware issue which cannot be corrected? Do all ADF document scanners in this pricerange have this problem or are the Canon or Fujitsu better in this regard? Are there any other scanners which don't have this problem - they need to be able to scan thick postcards? Do (affordable) flatbed scanners exist with a duplex option (without ADF) with enough scanning speed? Is there some forum besides the newsgroup where these questions would be more appropriate? Thanks in advance for reading this, sharing your thoughts and answering my questions! Joe. Joe, There are some people who participate here that have scanned tens and hundreds of thousands of documents or images using a vareity of methods. One I recall even created some software for a commerical customer to utilize. Each project is unique from a scanning point of view. It appears you have a variety of shape and sizes in objects (documents). 1) You need a variety of tools and a constant operator with the ability to change methods on the fly. It's been my practice to attempt to keep the work flow as close as possible to the original order of the documents (rather than sorting the work flow by size and methods). 2) It's been my practice to deal with text and images sepatrely. Thus if you have a document which inlcudes an image the result is two digitiaztions. 3) For general text (plain black and white (line art), PDF is the simpliest archival prcoess. The newest version of ABBYY FineReader (9.0) allows OCR of PDF line art (later) for conversion to editable text. 4) for images, a variety of tools may be used. 5) ADF and multiple sizes are a dream and anything that is gained in saved time will most likely be sacrficed in quality. 6) My work surrounds the archival of older periodicals and a $50 Cannon scanned has been a workhorse. Course the cheapest scanners are absent of depth of field, however sounds to me like something similar would do just fine for your needs. Good reading. www.scantips.com |
#3
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Deskew and photos on a document scanner
On Sat, 16 Feb 2008 14:08:41 GMT, Don wrote:
Joe none@nowhere wrote in news Hi all, I am looking for a documentscanner to archive many documents. Some of these are regular lettersize, others are thin paper @ 1/3rd letter size, abt 10.000 are indexcard sized cardstock(thick paper), color handwritten and printed pictures which all have just a bit different size - no two are the same. Many documents have information on both sides sometimes with stickers pasted on them. All this makes for a wide range of documents to process with challenges to get the quality somewhat right. I started archiving using my trusty old HP 5370 with Vuescan which works well as long as I am careful in how I put the pages but it is way to slow in getting everything scanned and filed during my lifetime without giving up living a life. So now that documentscanners have reached a reasonable pricepoint I am considering purchasing one and archiving more so the original documents can be boxed and stored away from prime-space. After searching various sites and reviews I had decided to check into the Kodak I-1220 duplex scanner over the Canon DR-2580 and the Fujitsu FI-5120 because of the praised feeder, image quality and ability to scan plastic cards. I tested one (on the cardstock, different sizes) but found that the ADF did not pull all documents straight through. The deskew option could straighten this up though, however it cut off parts of the top/bottom images - or maybe those parts were never scanned. I am not quite sure why and the store did not have a good explanation. I assume this is because the scanner only scans when the paperrollers detect paper. Because the paperrollers are "somewhat" in the middle of the scanner when paper is skewed a corner of the paper would already be past the roller and at the end the final corner would not be scanned yet (hopefully you understand what I mean here). The result is that sometimes the corners of documents are not in the scanned image. These corners do however hold part of the information needed. I was truly disappointed by what I saw or maybe my expectations were too high and this is the state of current technology... Now my questions: Is this phenomenon a driver issue which can be corrected - if so how? - or is this a hardware issue which cannot be corrected? Do all ADF document scanners in this pricerange have this problem or are the Canon or Fujitsu better in this regard? Are there any other scanners which don't have this problem - they need to be able to scan thick postcards? Do (affordable) flatbed scanners exist with a duplex option (without ADF) with enough scanning speed? Is there some forum besides the newsgroup where these questions would be more appropriate? Thanks in advance for reading this, sharing your thoughts and answering my questions! Joe. Joe, There are some people who participate here that have scanned tens and hundreds of thousands of documents or images using a vareity of methods. One I recall even created some software for a commerical customer to utilize. Each project is unique from a scanning point of view. It appears you have a variety of shape and sizes in objects (documents). 1) You need a variety of tools and a constant operator with the ability to change methods on the fly. It's been my practice to attempt to keep the work flow as close as possible to the original order of the documents (rather than sorting the work flow by size and methods). 2) It's been my practice to deal with text and images sepatrely. Thus if you have a document which inlcudes an image the result is two digitiaztions. 3) For general text (plain black and white (line art), PDF is the simpliest archival prcoess. The newest version of ABBYY FineReader (9.0) allows OCR of PDF line art (later) for conversion to editable text. 4) for images, a variety of tools may be used. 5) ADF and multiple sizes are a dream and anything that is gained in saved time will most likely be sacrficed in quality. 6) My work surrounds the archival of older periodicals and a $50 Cannon scanned has been a workhorse. Course the cheapest scanners are absent of depth of field, however sounds to me like something similar would do just fine for your needs. Good reading. www.scantips.com Don, thanks for the constructive suggestions. I will take all these into account however, I am not (yet) convinced that a documentscanner with duplex cannot to job I like to do - especially with for some of the tasks OCR recognision on keywords. Yes you are correct on the quality, however the Kodak's for example are apparently being used by photostores to scan shoeboxes of old photographs. I would assume they would not do so if the quality were bad. Yes, a consistent workflow and a consistent operator: me :-)) - not the most consistent person in the world are absolutely required. But the biggest issue for me as of now is the "de-skew" on a documentscanner.... Still looking for people wanting to share their experiences... scantips.com did not help me on this..... |
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