The RemoveDotShading method is designed to remove shaded regions from bitonal images. It leaves text and other prominent foreground features alone, not modifying their pixels.Įxample of AutoSmoothBackground - before & after If you know the resolution of every image and the font size of characters on the images, then use Despeckle and specify the maximum spec height and width.ĪutoSmoothBackground works only on color and grayscale images. This operation smoothes background colors to eliminate or de-emphasize noise that may have originated from dust on scanners or artifacts introduced from the scanning process.If you expect to have a diverse set of images and can't set the speck size for each image, then use AutoDespeckle.When the resolution of the input images vary from image to image, the typical speck size in pixels can vary as well. You do not require to specify the size of the specks in this process. Despeckle works only on bitonal images, and is designed to remove randomly distributed specks from the image.ĪutoDespeckle works only on bitonal images. This operation automatically detects and removes small groups of black pixels, called specks, that may have been introduced into the image from dust on the scanner or through the binarization process. Specks are removed by examining each group of 4-way connected pixels and removing any group below the selected size threshold. Field books and pencils used to be the only way of recording data and I've researced some field notes over a hundered years old.The Despeckle method is used to remove small groups of pixels, called specks, from the image. There's a side note on this issue as well in the Survey / Civil field, and that concerns the "archivability" of electronic field notes and survey data. If you're going to use the fixatif, make sure your agency is ok with it. I'm not sure of the resolution - I've lost track of that conversation, since I'm doing more engineering now than surveying. Just recently, the survey community here has had a problem, because one of the media acceptedable for filing plats sudenly became unavailable (I think it was the mylar). If you look at a museum's idea of "archivable", though, a good H pencil on a high quality acid free velum is "archivable" to 400 years or better with proper care. Oregon law used to require "archivable" quality submittals for survey plats, which most of the County Surveyors interpeted as Black India ink on mylar. It all depends on the agency you are submitting to, and their requiredments. I just forgot what this product was called since it has been a couple of years since we have used it. I have to firmly beleive this is the proper way of doing this as this is the way we have done it in the past as well as with all of the people that have recomended using the filatif. We have all of our old Mylars in a seperate drawer and there is no sticking, discoloration or any other cosmetic problems. |>We have done several of these over the years and have never had a problem after we spray the filatif on it. The ink should stand on its own in my experience. I actually never realized people used fixative on ink/mylar, i thought it was for pencil/artistic stuff. I've seen this happen when mylar for electrostatic plotters is used in inkjets. If the ink is not drying in the timeperiod you are used to, something has changed.
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