Photoshop :: Resampling Order Of Operations?
Jan 12, 2013
I have a large image (21.6 x 14.4in, 51.3MB, and 240ppi) that I need to reduce to approx. 7 x 5in, under 30MB, and 300ppi. First, I resampled the image down to 7 x 4.667in, 5.38MB, and 240ppi. Later, after I realized that I forgot to change the resolution, I resampled the image up by changing the resolution to 300ppi. I was left with a final image that had the following characteristics: 7 x 4.667in / 8.41MB / 300ppi. Since the file size is larger, I'm assuming that Photoshop did a bit of guesswork in order to add information back into the file.
If I would have changed the resolution from 240ppi to 300ppi at the same time that I resampled the image down to 7 x 4.667in, would I have gotten a better image? In other words, should I have done all of the adjustments at the same time?
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Jun 13, 2006
To make this clear in my (Holy & Venerable) head once and for all:
The "resampling down" option should be applied when resizing a picture to a smaller size (Thus, I should preferably use "bicubic smoother"?)
Whereas resampling up will give best results when making a picture bigger ("bicubic sharper" for this one?)
Also, what is your experience of these resampling methods in terms of quality loss? I'd assume quality loss will be greater whenever you try to "create pixels out of thin air" as in resizing pics bigger?
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May 21, 2009
What happens to the image when I transform (Ctrl +T) the image regarding to its re-sampling interpolation aspects? By transform I mean make it bigger or smaller.
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May 21, 2009
In the image size dialog you can determine what gonna happened with the pixels when you change the size of an image by check or uncheck the re-samping. But what happens to an image when I commit a transformation operation (Ctrl + T)?
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Mar 2, 2006
I've tried to figure out a way to do a batch-resampling in photoshopCS2 (Bridge) but I can not figure out how. My books / Helpfunction does not mention it either (as I can see). I've also tried googling.
Is it possible?
I do not want the pixel-size to be reduced before I do the proper croping and stuff on my pictures for web. I need them to go down from 300dpi to 72dpi, then crop them and then resize them to 800x600 (aprox)
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Apr 12, 2005
I take digital images in RAW format, usually quite large, and then open and save the image as a large format Tiff file. At that point, I have to resize the image for the purpose at hand. Here goes...
I normally take the image down to roughly 4x6 inches (I keep the "Constrain Proportions" box checked) and desire a final resolution of 300dpi. Because I'm starting with a much larger image also at 300dpi or higher, this isn't a problem. However, I'm unsure about checking the "resample image" box.
My question is, should I check this box? I'm going to insert my desired resolution dpi regardless, so is it necessary to check the box or should I leave it unchecked? I'm starting to think that the purpose of leaving it checked is to perform roughly the same function as the "constrain proportions" box - to allow the software to automatically resample the image based on the resizing I do. But again, I have a particular resolution in mind and so I'm wondering if it's okay to just uncheck the box and insert my desired resolution. Or, even leave it checked but just go ahead and insert my desired dpi resolution as planned.
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May 27, 2013
When I resample in CS6 using bicubic sharper, I'm getting what looks like a gray on black plaid pattern in the darkest areas of the image.
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Nov 18, 2013
I can only resize an image using pixels as unit when resampling is turned on. Why can't I resize in pixels without resampling? I can use all the other units but not pixels...
Photoshop CC, Win 7
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Sep 26, 2012
how do I re-order or change the order of images within a file?
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Dec 11, 2011
Is cropping to a larger image the same thing as resampling...? I believe I was told it handled the information differently without adding extra pixels... is this true.?
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May 15, 2013
I am a Creative Cloud member, and have downloaded all of the products and they are all up to date currently. The issue I have is, I see all these people using a new resampling setting called "Preserve Details". They go Image ------> Image Size, and then the window pops up. Now their window already looks different then mine. Mine looks like it did in CS4, theirs has an image preview inside the window, plus they have another resampling option available to them. Why doesn't my have this option?
I have tried to upload an image to show you what I mean, but I am unable to upload via my computer, and yes it is the correct size (>450 pxs wide by >500 pixels tall, 131 KB).
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Jul 31, 2012
Ps CS6
OS X 10.6.8
Save For Web offers 5 resampling algorithms (the same 5 as in Image Size, ignoring "Bicubic Automatic", of course) for when the output is being resized.
All choices except "Nearest Neighbor" output an identical image (which is different to all results of Image Size). Although the "Bilinear" output contains the same pixels as the output of the 3 bicubics, its file size is slightly different than their shared file size.
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May 17, 2012
I haven't had Photoshop Extended before CS6, so I've been experimenting with doing some simple 3D stuff, such as turning text into 3D shapes and trying to match it to a photographic background.
What I'm doing seems quite simple, and it seems to be working, but there's one glitch: A few things seem to take a really long time. At worst, Photoshop goes completely unresponsive for about 40 seconds.
A good example is this: I have a photo I've opened in RGB/16 mode at 4096 x 6144 pixels, and I create a new Text layer over the photo with one word in it: STOP
I click the 3D button in the Options area for the Text Tool, and wait a full 40+ seconds before seeing the pop-up that asks whether I want to switch to the 3D workspace.
I assume a 40 second delay isn't normal. It's certainly not acceptable.
Once in the 3D editing realm, I can do most things with relative ease, such as moving the 3D mesh around, rotating it, changing lighting, etc. The update time for any of those operations to show is maybe 1/2 second or so to show on the screen. Some things are a little faster. Even rendering it into a pretty clean state is fairly quick - just 10 seconds or so.
I've tested this in both Photoshop CS6 32 bit and 64 bit, and the performance seems about the same, as does the appearance of the long delay.
Other observations:
I also see the long delay if I click on a history step to go back or forward in the history. If I work on an 8 bits/channel image the 40 seconds is reduced to about 2 seconds. I have a decent 8 core machine, with (by today's standards) a modest graphics card: ATI Radeon HD 5670 with 1 GB DDR5. I'm on the ATI Catalyst 12.2 drivers because the 12.4 (latest) set has other problems. But when I did try the 3D stuff with 12.4 the delay was the same.
Example: Going from this screen to the one below takes 40 seconds.
...40 seconds later...
Ultimately tweaking it to look decent seems doable - no crashes or glitches...
Not knowing what to expect, or what I should expect to not try to do, what I'm doing seems pretty simple. Am I trying something I shouldn't? Is it just a given that to do 3D one is supposed to work on 8 bits/channel data?
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Mar 21, 2012
A few weeks back my illustrator started resampling all of my high-res images to 72 dpi upon opening.
example:
Image A: Resolution 300, 877 x 591
I'll open that image in Illustrator (which, I've been doing for 8 years without problem) and here is what happens --
I get a bounding box of 877 x 591 - HOWEVER, the image is floating within that box at (what I'm guessing is around a 72 resolution) 213 x 142 pixels.
If I save the file out at 72 dpi - the image pulls up the right size in illustrator - it's just any image file that's a higher res than 72.
I'm running CS5
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Mar 6, 2013
Here I have several concentric squares in an uninterrupted stack.I moved the topmost (small orange) one vertically.I then went to the Alignment panel, selected all the squares and clicked on the one I moved.Then I clicked on Vertical Distribute Center.
The right hand picture shows what happened.One of the squares (that big orange one) near the bottom of the stack shot up so that its centre was above the centre of the topmost one in the stack.The centres are evenly distributed but why is the stacking order not controlling the order in which the squares are arranged?
Fortunately the positioning of that big orange square was easy to correct, but something tells me this is not the way things are supposed to happen.Seemingly this does not always happen. I have tried the method on several stacks. Some were o.k., others showed similar behaviour to the above.
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May 15, 2013
Everytime I Resample pictures that are big in size, and resolution, and I reduce the resolution and the size, the end result is always blurry. (doesn't matter if I use Draw or Paint)
- image is 39.4"w by 29.556"h @ 72 DPI, RGB, JPG (when opened in Paint or imported into Draw)
- I want it to be .976"w by .736"h @ 300 DPI ... yes alot smaller
Ultimately, once at the small size, I need to take all artwork (bitmaps, text etc) and make one 300 DPI bitmap to be run on the press.
I have tried ...
- Resampling the original sized image, that is 72 DPI, into 300 DPI and then Resampling the size from there and end up with Blurry (left on Anti-Alias and Maintain aspect ratio)
- Resampling size and DPI, in one step, and end up with Blurry (left on Anti-Alias and Maintain aspect ratio)
- made the image proportionately smaller (now DPI is 2,089) and then Convert into 300 DPI image, and end up with Blurry
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Sep 26, 2010
This happens only occasionally. I have a file open in PP5. I resample the image -- reduce the physical size from, in this case, 53 inches to 8 inches high, and increase resolution from 72 to 300 dpi, with the resulting file size smaller than the original. I save the file, then import into my layout in Coreldraw. The imported file is back to 72 dpi and the physical size is huge. I reopen the file in PP, resample again, and resave under a new file name. Same problem occurs when I import into Draw. Of course, I can physically shrink the file to 3 inches high and the resulting dpi will be 300.
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Feb 29, 2012
Every so often I notice that my preferences have been reset. Can't pin down a frequency, but you say every 4-6 months this happens.Documents open in tab form, my scratch drive is now C, and the checked options of S and O drive is gone.
I have not reset the preferences or done any actions or disk clean up operations.Using current version of McAfee Security Center and it does run scans automatically. But it does this frequently so the 4-6 mo. of reset makes this unlikely.
Windows 7 OS and PS 12.0.4.Have noticed this same occurrence for years even with CS3.
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Mar 18, 2012
Is there a way to customize menus or add buttons to the control bar to make repetitive operations single step. Thinking specifically of adding an import button somewhere (similar to PS Elements 2) in which the current scanning settings are stored. Presently it takes about 6 steps through the menu to accomplish this.
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Apr 17, 2012
it's possible to see a status of savon operations in CorelDraw X6? I've read that the progress bar has changed to a small icon in the statusbar in X5, but in my recently installed X6 there's no such thing. I always have to guess whether Corel is done saving or not. This is also relevant for exporting to PDF.
forcing the measuring tool to measure only horizontally/vertically. The automatic function does not always do the trick. I have a feeling that the improvements of the measuring tool has actually made it less usable. The centering of the values used to work better in X4 and I still haven't managed to change the default color of the measurement lines and text
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Mar 16, 2010
Is posible to disable undo for certain operations?
I want to disable undo for some for some transactions. if posible it...
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Aug 9, 2012
new to 3D modelling in Autocad. the client has asked me to detail this in about 20 places on a structure.Its an SHS edge beam joining a CHS rafter.Both are at different angles.The CHS has a cleat plate, as does the edge beam.The 2 need to align and connect. The bolt hole must be 40mm off the face of the rafter.The rafter CL & edge beam CL need to coincide at a setting out point.
Where the rafter cleat plate connects to its rafter it has to be in alignment with the rafters plane.SHS edge beam will need to have its sides vertical and horizontal, so the edge beam cleat won’t be aligned with the SHS faces .
Even though I have the autocad file as an example, have tried to draw this about 100 times but cant get it right – I have been unable to contact the draftsman who did it. How to draw it and what commands to use?how to use UCS and other modelling operations.
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Nov 19, 2013
Lightroom 4 is saying "Some import operations could not be performed" then says "following images could not be copied" when I try to import any photos.
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Nov 8, 2012
I have imported images from a brand new My Book hard drive, completed my edits in LR, but when I attempt to export to a subfolder located in the original folder, I repeatedly get the error message: "Some export operations were not performed." None of the images are exported. I was able to export this way to my desired location at least once before, but I'm not sure if a setting got changed or what the problem is. It does however, let me export to other locations such as the Desktop.
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May 27, 2013
I have been using lightroom for a year and now suddenly I cannot import pictures, I get the message "some import operations were not performed, could not copy a file to the requested location" I have tried both Raw and Jpegs and have installed the latest updates 4.4.
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Feb 10, 2009
My copy / paste operations take several seconds. I'm copying very simple objects, lines, rectangles, etc. but regardless of the size of the object, a copy/paste operation takes 3-5 seconds.
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Mar 7, 2013
I have an existing polygon, I'd want to select it and :
1.- Delete all inside it
2,. Delete all outside of it
Both actions with an option to include points of cut objects.
Civil 3D (2013)
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Jul 28, 2011
app name, but is there any way of using (calling) operations from inside my C# code?What I'm saying is that, there is a SDK through Paint.NET so I can have simple Image Editing from my custom application?
If not, is there a way to call Paint.NET trough my code, make some editing and then closing Paint.NET continue handling the iage from my C# app?If this is not suitable for my needs, any simple Image editing tool so I can use through my C# application?
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Apr 19, 2011
I created a cone where I wanted to cut some cylindrical hole in it so I created the cylinders and did a boolean subtraction of the cylinders from the cone.
I got the holes cut out, but the resulting object appears as though it's hollow. Is this something do do with my display or is there a setting I'm missing to create objects as hollow/solid?
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Apr 18, 2013
I have begun experimenting with bump-mapping procedures, and I decided to create a mask which would create the effect of a three-dimensional rectangular pyramid with a flat top. So far I have only created raised bump effects with the Gaussian Blur filter, but this tool apparently has it's limits in that it won't raise any shape by more than a quarter inch or so on the screen - after a solid black rectangle is blurred beyond 30 or so it loses it's impact on the colored background.
So I thought that maybe I could use the Blend tool, which can produce a longer gradient of white on black for a more gradual and longer bumping. Problem is that I only seem to have one layer of selection available, and I want that radial grade set for angles to operate on the area outside of what would be the flat area atop my pyramid, and I cannot get it to blend anywhere other than within my selected area. I sort of need to make Blend respond like the Bucket Fill tool to a defined area, but it seems that this would require a secondary selection border (sort of like making Blend act on a broad ring, but a rectangular one. ). I thought of simply placing a layer for the pyramid top over a rectangle with the Blend effect, but I think the gradient should begin outside of the top rectangle, not under its center. Also, I would need to merge these two layers (probably as another image unless GIMP allows the merging of cherry-picked layers). Anyway, what would be your procedure for producing this effect (any that works and produces a long, even grade from outside a flat area to the ground below)?
The last idea I mentioned (which I doubted would be satisfying anyway) would require me to merge the two layers, one for the flat pyramid top and another for the larger surrounding area which would set up the effect for grading to the ground below. It would be no biggie to do this, but here I discovered a particularly awful GIMP bug when I tried opening another image while using Radial. I have been working with GIMP for a couple of years as a practical tool for plotting project map locations with a few symbols which I've created using the same, but nothing requiring what I'm trying to do now. I have often had multiple images open, with one box listing my layers, and I have up until now been able to rely on it to report what layers I had to work with for the image I am currently working in. Now it's getting really crazy. I wanted to test the results of bumping white on black in different shapes to colored backgrounds, using different radial effects or different blurring effects, so I started with newly created images which I would compare. Working in the new images the Layers box displayed the new layers which I had created for each new image. For example, I bump-mapped a mask for a cone on a solid blue background, removed the layer visibility for the mask so that I could view the results. What I saw was NOT the effects of the mask on my blue background but the bump background showing what I had done with a rectangle mask in the image I was previously working on! The Layers box did not change, so no I could not have switched windows by accident. If the other window image window was still present (further unhappy experimentation revealed that it didn't have to be from the point after the new image window was spawned), it did not contain the cone effects nor any layers which I had just created. I have experienced this both on my work machine (Windows XP) and my home laptop (Linux).
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Mar 15, 2013
I am trying to change settings in my template so that some of the Edit operations are turned OFF by default in newly created surfaces. Right now all of these options are turned on for each new surface. The command settings for CreateSurface allows me to control the build options for new surfaces, but I cannot find anything for edits.
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