AutoCad :: Lighten PDF Underlay
Apr 6, 2012
I haven't used PDF Underlays very much as we're always given CAD backgrounds. In this case, I used them to quickly put in since we won't get CAD files. However, they are scanned PDF's so they are essentially raster images. They have jagged lines, etc.
Is there a way to just lighten these when plotting so I can still use them as my background? or should I just bite the bullet and trace them to get actual ACAD lines to be able to control in plotting?
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Nov 29, 2013
How to Lighten areas?
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Mar 7, 2008
I have a collague of pictures I want to lighten up. No matter if I use the marque tool or ctrl A, it just takes this one picture to lighten.
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May 8, 2012
I took a portrait type of picture with a flash. The people are ok, the background is to dark. How can I lighten the background.
In the past when I took pictures for our awards, I used the blur method because I didn't lie the busy background. The background style on these pictures are ok. I just have a picture that I want to lighten the background.
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Dec 23, 2007
I would like to lighten, brighten and color up this pic, since it's rather dull now. How can I do this?
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Aug 19, 2010
lighten the faces on a photo when they are shadowed. Attaching photo.
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Nov 9, 2013
I have taken a beach and sea shot with palm trees and greenery in the foreground which when printed are very dark. What is the method to lighten this specific area using elements 10 ?
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Aug 30, 2012
I want to send a consultant our dwg file as a dwf so they can use it as an underlay. I cannot find any clear info in forums or on web to create it from model space (so 1:1 scale) for them to attach it in their model space. AND when I did try it (just not sure it is the best way), I insert in (as DWF underlay) and it comes in with all white lines & the line weights of everything are way too thick.
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May 2, 2012
I wish to use a pdf document as an underlay to draw over in autocad LT 2008 and print off.
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Oct 2, 2012
I have about 100 images similar to the example below where the background is a neutral grey, darker at the edges then becoming lighter as it reaches the image subject. I'm looking for a way to lighten the grey background without have to mask the item in the center.
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Mar 9, 2008
With PS CS, I have noticed in Lab color space the lighten and darken blending modes for layers are disable. Also, if an RGB picture uses them, they are converted to normal blending mode upon conversion to Lab. Any idea why this limitation? And any way to circumvent it?
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Oct 4, 2006
I have a photo but I want to lighten it considerably to use it as a background on a business card. I am using Photoshop CS and how do I do this?
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Apr 26, 2013
When I am in the develop mode, and I want to darken, or lighten the background, or the fore ground, or anything in the picture. Do I use the Radial Filter, or the adjustment Brush? How to use both of these tools?
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Jun 4, 2012
I'm using AutoCAD LT 2013. When attempting to attach a PDF as an underlay, I go to the Insert tab, choose "Attach" from the Reference panel, pick the PDF I want, and then...nothing. No dialog boxes come up, I get no error messages, it just doesn't do anything at all. I just upgraded my RAM and I know the rest of my specs are up to par, and I did get this feature to work once, but now it doesn't do anything.
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Dec 10, 2013
I have a pdf underlay in my dwg file and I found I can snap the object in it, end point, mid point, etc. Is this mean there are some ARX functions to retrieve the object in pdf underlay?
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Feb 21, 2012
I'm trying to import a pdf underlay in AutoCAD 2012. However, every time I have imported it, the frame of the underlay shows up, but the pdf itself doesn't show up.
Contrast = 100
Fade = 0
Monochrome = No
Show underlay = Yes
Path is correct
I've tried importing image underlays (PNG files), and they work fine. Also, the pdf file is pretty big (about 100 MB), so I didn't know if that affected its ability to display.how to get this to show up?
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May 4, 2012
I have a seascape photo with an island in the middle of the water. think of a black triangle surrounded by sparkly waves. I want to isolate the exact shape of the island so ONLY the island can be lightened a bit. Is there a nice video tutorial showing what that process is? tried some things in photoshop like the lasso tool but I could not get the island shape traced exactly enough. something similar in Photo paint?
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Jun 6, 2008
I need to know the best way to lighten part of a picture without it being two-toned. An example of this is when I took a picture of someone inside a house.
The orange dress is vivid, and the white wall and door came out good also. The problem is that the lighting wasn't good enough to bring out the true skin tone of the person. So much so that the person's face could hardly be seen, and her neck and hands came out the same as her face also.
I tried to lighten her face by using the Ellipse in Tools>Adjustment>Brightness/Contrast making sure not to go outside the perimeter of the face. I then zoomed to 1600X and manually changed the rest of it a few pixels at a time by switching to the Rectangle in Tools . The result after more than an hour later was something that looked akin to pasting an egg in place of her face on the picture. It was grainy and looked ridiculous.
I don't want to lighten the whole picture because it ruins the true color of the dress, and not as important, the door and walls don't look as sharp and vivid either.
P.S. I would also like to know how to do the reverse; darken a specific area without the two-toned look.
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Mar 7, 2013
i would like to lighten the front portion of a seashell. how would i do this/ what selection tool etc. Attached is a photo of a seashell floating on some clouds.
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Jan 7, 2014
My girlfriend has a problem with AutoCad 2013 students version. After attaching pdf file in underlay option AutoCad crash. She's got macbook air with system version OS 10.9. She had not ever problems with pdr iunderlay before.
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Nov 27, 2012
I understand that a pdf underlay will slow down AutoCad and its functions. My company just switched from AutoCad 2010 to AutoCad LT 2010, while maintaining the same computer and it has become astronomically slower. Is this an issue I have to deal with or is there a way to improve its efficiency?
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Apr 15, 2013
In AutoCAD Architecture 2012 we try to use the PDF Underlay to insert PDFs into our dwg files. We have problem to scale the pdfs correctly. We use metric units (mm) and when we insert our pdfs it scales to imperial units. For example, we have a pdf plotted from AutoCAD (or Revit) as an A1-sheet (841x594 mm) an insert it canceled to 1 the inserted pdf (image) get the size 33,11x23,39 which is the sheet size in inch. If the drawing is in 1:100 scale we would like to scale it up to 100 to get the correct scale in AutoCAD but it won't work.
I have tried insunits, insunitsdefsource, insunitsdeftarget but it has no effect.
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Feb 21, 2012
I'm trying to import a pdf underlay in AutoCAD 2012. However, every time I have imported it, the frame of the underlay shows up, but the pdf itself doesn't show up.
Contrast = 100
Fade = 0
Monochrome = No
Show underlay = Yes
Path is correct
I've tried importing image underlays (PNG files), and they work fine. Also, the pdf file is pretty big (about 100 MB), so I didn't know if that affected its ability to display. How to get this to show up?
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Jul 14, 2011
I am attaching a PDF or DWF file to my drawing it shows in xref dialog but when i try to get it from
Database.GetHostDwgXrefGraph its not in the graph node list. can some body give code example, how i can update the underlay path. the following code crash Autocad.
using (Transaction trans = database.TransactionManager.StartTransaction()) { UnderlayDefinition uDef = trans.GetObject(objId, OpenMode.ForWrite) as PdfDefinition; uDef.UpgradeOpen(); uDef.SourceFileName = newPath; trans.Commit(); }
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Aug 19, 2013
After loading a single 24x36 road plan and profile PDF drawing as an underlay, Autocad is so slow and jerky I couldn't work with it. The PDF file size is about 1 MB. I need to load at least 10 more, so it is a hopeless endeavor to use the PDFs. I'll have to convert them another format such as to JPG to get the job done.
How to use this functionality, but if the performance isn't greatly improved it might as well not even be included in the product.
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Aug 31, 2012
I'm working with ACAD 2013. I need some way of masking part of a PDF underlay. Basically I am attempting to call out something on architectural plans and create a listing on a table. The mask needs to be transparent, kinda fading the rest of the plans out, leaving my little callout box.
The ways I can think of doing this involve a little trickery. I think if you bring the PDF (2) times create a clip then create the opposite clip then turn the fade up on the outer one should work.
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Aug 26, 2012
Client of mine has been experiencing slowness with AutoCAD LT 2013.
The program works fine when working on floor plans. However when they open up any PDFs to be using as an underlay, AutoCAD LT performance on scrolling up/down left/right moves as a snails pace.
PC Specs are: Intel Xeon W3505 @ 2.53Hz, 3Gb ram, Windows 7 Pro 32-bit, nVidia Quadro FX 580
Currently about to suggest upgrading the video card to a Nvideo Quadro 2000 1Gb Video card. Would this solve the issue that my client is having the the slowness when scrolling when a PDF underlay is used.
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Dec 12, 2013
Is there anyway to be able to edit a PDF document while the drawing it's referenced in is open?I would have thought that a PDF underlay would have worked in the same manner as an external reference does.
We use crystal reports to create reports from the drawing, export to PDF and insert back into the drawing.Then when items are released for ordering and received the PDF is stamped as such and the underlay reflects that progress in the drawing.
But if a user has the drawing open the PDF is locked for editing.
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Jul 31, 2012
I have a PDF underlay that is giving me some issues. I locked the layer and moved the pdf underlay's x-position to -1 and sent the drawing to the back to make sure it stays underneath all my lines, but annoyingly, everytime I draw something, it ends up *under* the PDF and I have to zoom out very far and selected the pdf to "send to back" again.
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Dec 11, 2013
pdf has the same layer state as these were in autocad file
this pdf is attached as pdf underlay is it possible/ how to on/off the layers of this underlay
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Oct 30, 2010
I'm using ACAD2011 and a HP DesignJet 500 plotter. We use PDF underlays of scanned charts, maps, etc in our cad plans and sometimes the PDFs will only partially plots even though the rest of the cad line work plots. We are using 2007 dwg file format to make files compatible with another program. I have monkeyed with the RASTERPERCENT and RASTERTHRESHHOLD variables but still same problem.
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