Hello, I need to despeckle a scan of a document consisting of black text and greyscale images. Basically I want to remove all isolated pixels, but without. Despeckle removes undesired noise—small dots or stray pixels—that may be introduced to the page during the scanning process. Images that have been. Hi folks – just came upon this board looking for some help, so here goes: I need to find a way to setup a batch process which will run the.

Author: Moogugrel Naran
Country: Ethiopia
Language: English (Spanish)
Genre: Sex
Published (Last): 27 June 2012
Pages: 26
PDF File Size: 18.1 Mb
ePub File Size: 1.88 Mb
ISBN: 244-2-40351-913-5
Downloads: 12497
Price: Free* [*Free Regsitration Required]
Uploader: Vijinn

Yes, Acrobat could have a pixel level editing tool, but by using Photoshop, I can usually get what I want with an application that is actually designed to do scannev kind of stuff.

A reduced size video view often appears worse than it is. The Median filter is very similar, it smoothes differences in pixels. Not all paper documents are written in “portrait”, that is thinking of a sheet of A4 paper, with the natural orientation for reading such that the narrow part is the basis of the paper. Patrick Hurley 2, 7 How many years must go by before Adobe addresses this common problem in somewhat the same fashion as did Nuance with its Paperport product many years ago with its built in eraser tool?

How to maximize OCR accuracy OCR text recognition is heavily influenced by the quality of the text document that is being processed. What color would I change to? Some Median filters also have a Radius parameter. It appears that you have zcanned glossy surface with a pebbled texture.

I don’t find that this helps.

This makes it easier for the software to match new characters to characters that are already in its memory. I am not interested in vespeckle reproductions in my.

By clicking “Post Your Answer”, you acknowledge that you have read our updated terms of serviceprivacy policy and cookie policyand that your continued use of the website is subject to these policies. Viewed in a angle. Not all scanners provide this. So, I want to know where that tool is located in DC.


A few scanning tips

After you clean up the. Regardless if or dpi is used, then resample the image to smaller final desired size. How to remove white spots from a scanned picture? Straightening a rotated image is simply resampling, pure and simple, from one grid to another.

Our rotation of the original just introduces yet another problem, and there is no one angle that will solve anything. Some OCR tools have the capability to clean up images to make them easier to recognize. Here is what a chat agent suggested as a way of removing random dots and speckles from scanned documents: There’s something I can do? Post as a guest Name.

The issue is as you are guessing with the non-glossy finish reflecting the bright light from the scanner. When you scan documents, you always use the same orientation for which we will be left with rotated images correctly for reading, and with no other.

Clean Up Images with Despeckle – CVISION Technologies

To avoid that, during the next consultation document, the operator must repeatedly use rotation functions to be able to correctly read the full document, have been specifically developed functions of auto orientation that allow you to automatically perform this operation in batch, about a group documents, without human intervention.

What do you think? You can not post a blank message.

Smaller page areas may be practical at dpi, but a full page color image will be MB. You will find the scanner’s Descreen filter to be better easier and more effective than most other techniques. Sign up using Facebook. By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service.

Paper documents scanned to. With the filter, it’s rather good, but scannrd perfect. There is a bit difference between Paperport and Acrobat: Normal removable dulling spray doesn’t despdckle completely and will take some care to remove completely. There are four screens, one for each CMYK color.

The subject is really quite complex and all images are different. I would have thought the tech guys at Adobe would have addressed the removal of these disfiguring items in Acrobat 12 so as to make the edited. Any “de-speckle” tool is clumsy and inefficient, because such tools do not recognize and eliminate all random dots or speckles; hence, the need for a target specific eraser tool. Karl, what the agent is suggesting is that I go to the “Edit” toolbox, select the “text box” tool and surround the random dot or speckle with depeckle “text box” and, thereafter, change the color of the interior of the text box to the color “white”, thereby in effect “erasing” the dot or speckle.


Hopefully, the chat agent’s suggestion above will work, because my Paperport that has worked des;eckle for years has now developed an unresolved problem that is interfering with production of a cleaned up copy of a. Use the absolute minimum to do the job. The Descreen filter does something very similar, and is easier to use, but manual methods offer more control.

Please type your message and try again. In order to maximize OCR accuracy, make sure that your scanned documents are as clear as possible. I have a photo and I scanned it, but the scanned version introduced a lot of white spots on the image.

Taking note of Information of the policy of personal data D.

Descreen methods for Moiré patterns

Stan 3, 9 You do not want to sharpen until after the pattern is removed, that would aggravate the problem. My sole concern is the creation of clean and handsome black on white.

Despeckling looks for small dots that don’t fit with their surrounding area and dsepeckle the appropriate filter for this kind of problem. However, severity does vary with resolution and resampling. If you do not have the negatives, scanning the photo in different orientations may help as this will change the direction of the reflected light.