AutoCAD LT :: Raster Image - Changing Pixel Size But Still Maintain Scale
May 18, 2012
So we've been sent a DWG file for a large site, that includes a massive aerial (TIF) image.
At this point it's too large to even work with so I'd like to scale it down (proportionally, so it will still maintain the same aspect ratio).
For simplicity sake, lets say the image is 15,000 x 15,000 and I want to scale it down to 5,000 x 5,000.
The problem is that AutoCAD seems to use that pixel size to determine the actual scale, so when I updated the new (smaller) image, it was also 3x smaller in the world.
How do I scale down the image independently of the size so it will still maintain the same scale in the CAD world? (I'm a 3D guy so this is akin to scaling down a texture, yet having the plane its projected on maintain its original scale.)
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Aug 28, 2007
i currently have a logo that is 460X440 pixels and 12.17cmsX11.69cms and the resolution is 96 pixels per inch.
i am wanting to change it into a 2cm X 2cm avatar that is less than 6K in size,
how do i do this? everything i try makes the output file about 24k in size.
the reason i am doing this is the forum i regularly post on has a max avatar size of 6k.
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Aug 10, 2011
I have some issues with Raster Image lately when I wanted a scanned jpeg of 210 x 297 mm (a4 dimension) that I want to fit into a 180x220 mm rectangular box in Autocad. I have used Photoshop CS 3 to change the image size to 180x220.
However when I insert the Raster Image files, some files are automatically set to 180x220 (as expected) and others are scaled down and I have to re-scale them (reset the scale value to 1, change the x-value and the y-value is automatically changed, but on the overall it is 180x220, sometimes x is more than y or sometimes y is more than x, but within 1-3 mm)
I want to know :
1. What is the best principle or techniques of knowing/changing image dimension (mm)
2. How to be able to scale raster image in x-axis and y-axis independently of one another?
3. Remove white background to neutral background?
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Mar 4, 2013
I can not use my HP scanner. It looks like the image size is wrong and should be reduced to less than 49999 pixels high x 4999 pixels wide. Where could I change the image size in X4. Using Windows 7 Pro.
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Apr 28, 2006
how is the import scale for a raster image determined?
I've different scanned sketches of floor plans drawn by hand to specific scales, the resize tool is not quite accurate enough for my use. Does the view scale have anything to do with it?
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Mar 15, 2013
I've just recently changed jobs and so I'm working on a new (to me) system with Autocad Mechanical 2013. I had been working with Mechanical 2010.
One (of the many) issues that is bothering me, is that I can't seem to scale resize individual dimension. Normally, I'd create the dimensions and then if I needed to tweak the fit, I'd go into the Properties pallet and change the overall scale under Fit. Not really a good standard of practice, I know...
But when I do that on my current system, the dimension doesn't change at all.
On top of that, I have a weird refresh problem. If I grab a dim by the grip and move/stretch it, it doesn't actually show the new position unless I Regen. Is that a setting or maybe just a slow reaction by my computer?
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Jun 5, 2005
when you scale somthing it smooths it, but i want to scale a pixel image.
so it stayed all pixely.
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Dec 6, 2012
I'm using Photoshop CS5 and as you can see on the picture below, when I set my grid line to every 1 px, grid doesn't match canvas pixel size.
Now I'm not able to draw sharp shapes using pen tool because even if I hold shift key everything gets blurry.
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Jun 2, 2013
When changing brush size in CS6, I've noticed that it is has granular resolution from 0 pixels up to around 500pixels, incrementing in size very slowly. However, above 500 pixels it increases in size very rapidly, jumping to 800, 1200, 1500 and then into the 2000s.
As most of the photos that I work on have a high pixel count I find that my ideal brush size is between 400 and 1000, occasionally I use it at around 100 pixels, and occasionally at 2500.
Is there any way of changing the scale of the brush size so that it allows greater sensitivity in the 400 to 1000 range?
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Mar 7, 2013
Is there a way available in autocad so that size of chosen entity (say circle, polygon) remains as is during zoom-in and zoom-out?
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Mar 17, 2013
I want to change the size of the image in Gimp to 3957x4429 px (67x75 cm) at a 150dpi (the image we have has a 300 dpi.) When i do this in image - print size it keeps changing the width.
The system is not allowing me to get the picture a few cm larger. Is there any way I can overwrite this?
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Apr 4, 2007
Working with CS2, is there a special way to match exactly two different images pixel dimesions
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May 12, 2007
It blows my mind that somthing this simple isnt all that simple. I used the eyedropper tool to slect a color from another photo, then used the brush while fully magnified to change the color of each pixel.
It was coming out a weird greyish color, and I noticed that if I clicked more than once, it got darker, but so did the pixels directly around the one i was editing. So, i copied both pictures, loaded them into paint, and went to town.
It worked, but then when i copied it back into photoshop, it had a black background (there was no background in the original pictures) around the sprite I was editing. I tried to use the magic wand tool to get rid of it, but it took parts of the sprite with it, so...
Is there any way that I can edit the color of a single pixel (or hell, even a group of pixels if they share the same exact color would be nice...preferred, even) accurately? If not, what program could I use that would keep the transparent background?
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Mar 22, 2011
Export is weird, maintain size is checked but it dose not give the proper size. My page size is 922x1344, but the image exported is half that size.
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Aug 9, 2012
i get a 1 pixel size image when I double click the zoom for 100%.Fit screen or full screen is wacky too, not fitting or filling and sometimes going way beyond.
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Dec 15, 2012
"Image > Print Size" really IS the command you are looking for.
The key is to pay attention to the units-of-measure shown on the Print Size dialogue box:- The "Width" and "Height" values under Print Size are displayed in real-world units (inches, mm, etc.), not image pixels.- The "Resolution" values are displayed in pixels-per-unit.- You cannot change your image's pixel dimensions (aka scale the image) from the Print Size dialogue. That's what the "Scale Image" command is for.Remember the relation between pixel and print sizes is:(print size) = (pixel size) / (print resolution)
When you change the image's print resolution, of course the real-world size (the "width" or "height" shown in the Print Size dialog) of your image will update to reflect the new print resolution -- that value is calculated from your image's actual pixel size and whatever resolution value you just entered. This is totally normal behavior -- in fact, it's expected. If you change an image's resolution from, say, 150 pixels/inch to 75 pixels/inch, this doubles the print size of your image but only the print size; the image's pixel size remains precisely the same as before. (You can confirm this by comparing "Image > Canvas Size..." before and after changing the resolution.)
And as others have stated, if you're using the image for Web viewing then its print resolution has absolutely zero effect on how it will appear onscreen (print resolution only affects, well, actual printing), in which case you'll want to use the "Scale Image" command to actually scale your image larger or smaller.
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Dec 30, 2011
I am using the following routine definition then calling the different view poins from a pop up menu.
Each time I switch veiw points it drastically zooms out. I would like to maintain the "zoom distance" if there is such a thing when switching views.
Ideally, like when in 3dorbit, I would like it to swing views around similar to that but to the defined viewpoints as below....
(DEFUN V (inp) (setq inp (strcase inp))
(cond ((= inp "T") (SETQ IXY 270) (SETQ FXY 90)) ((= INP "F") (SETQ IXY 270) (SETQ FXY 0)) ((= INP "RE") (SETQ IXY 90) (SETQ FXY 0)) ((= INP "L") (SETQ IXY 180) (SETQ FXY 0)) ((= INP "RI") (SETQ IXY 0) (SETQ FXY 0)) ((= INP "URI") (SETQ IXY 0) (SETQ FXY 45)) ((= INP "UL") (SETQ IXY 180) (SETQ FXY 45)) ((= INP "UF") (SETQ IXY 270) (SETQ FXY 45)) ((= INP "URE") (SETQ IXY 90) (SETQ FXY 45)) ((= INP "URF") (SETQ IXY 315) (SETQ FXY 35)) ((= INP "URR") (SETQ IXY 45) (SETQ FXY 35)) ((= INP "ULF") (SETQ IXY 225) (SETQ FXY 35)) ((= INP "ULR") (SETQ IXY 135) (SETQ FXY 35)) );COND (COMMAND "VPOINT" "R" IXY FXY) );END V.LSP
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Jan 4, 2011
If I change the size of, say, the "file open" box, and shut it down, then open it again, it goes back to the default small size. Is there a setting that I can change so that the dialog box size stay's to my selected size?
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Apr 10, 2013
I would like to find a lisp that changes the scale of something that has an annotative scale and deletes all other scales in the object scale list. Often i have many different scales of existing dimensions or objects. i waste a lot of time opening the annotation object scale dialogue box, selecting add, finding my scale and deleting the old scale.
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Jan 29, 2009
I often use the Crop Tool to get part of an image to print at actual size.
For example, Crop: Width 7cm @ Resolution 600 pixels/inch (same as my
printer), then select a known width of 7cm then crop and print.
I figure there must be a way without actually cropping the image, perhaps by selecting the known dimension.
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Aug 19, 2012
I want to scale down the size of each image in a set of 125 photos, to save storage space in my computer. How can I do this other than one at a time?
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Nov 19, 2005
How do you scale a layer proportional to the image size?
I want to scale a layer so that it's 10% of the width of the full image. It's going to be part of an action, so I can't just do the math, and do it manually.
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Jun 8, 2012
What is the difference between the outcome of using the new content aware scale versus just going ahead and resizing the image? Or is this a matter of preference?
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Feb 21, 2006
When i enlarge the size of an image (using free transform, or scale) in photoshop CS2, the resized image gets blurred (or smudged) as soon as i've accept the larger size. How can i prevent this from happening? I'm trying to work with few pixels, and when it smudges the edges i get tons of colors i don't want.
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Feb 19, 2013
I drag the graphed box to scale an image down (or up) and after clicking "scale" the image size decreases but the original box is there (original size). Why?
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Nov 19, 2013
How can you do this? I generally create images of a different size than that so it would be really useful to be able to change it.
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Jan 21, 2014
I have adobe photoshop elements 7 and I am wanting to make my pictures be maximum 200kb and 72dpi, how do i go abouts doing this?
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Jan 12, 2014
Is there any way I can scale images down in size, whilst keeping the quality of the image? I am a Media teacher having to use this software with the class and they must have high production values for their controlled assessment. However, I do not know how to get around the problem that all the work is predominantly blurred because students have scaled down the pictures resulting in horrendous blurring.
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Jul 28, 2004
I have to process a couple of thousand photos. What I need to do is get PS to resize the canvas so that Height=Width, no matter which is the larger. In the area where it increases the canvas size, it should then have white space.
So that for a 10x5 landscape picture, it resizes to be 10x10 canvas, for a 5x10 portrait picture, it resizes to be 10x10 canvas, etc.
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Apr 28, 2013
How to resize the image without changing the size of the background? When I try it makes the picture fit exactly into the background when that is not what I want to do. Also the image is in a different layer than the background .
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Nov 10, 2012
How can I train Photoshop to change the image size of a photo when I pull daigonally on a corner with the cursor?
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