Questions tagged [rescaling]
The rescaling tag has no usage guidance.
58
questions
25
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Does it give higher quality to shoot in low-res mode in-camera, or to downsize high-res photos later?
Suppose you want to store your photos at some lower resolution, let's say about ~1 MB large.
You own a camera able to make photos at 5 MPix and more.
And, you want to have the maximum quality at the ...
- 353
22
votes
5
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How can I upscale a low-res image to make it appear higher-res?
I want to enlarge an image to a bigger size. This will cause pixelation.
So I want to apply some treatment to it in Photoshop that will suppress some of this pixelation. Of course I cannot generate ...
- 388
15
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3
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How can I open a very, very large image to downsize it?
I have an image with a 18984x28591px resolution but I can't open it with Paint or with Pixlr Editor to reduce its size.
How can I convert or open this large image on my laptop?
- 253
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Technical implementations of upscaling
So I've seen bicubic and fractal listed as methods of upscaling photos. What's the technical details behind how these work and why/when is one better than the other?
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How can one determine the ideal resampling algorithm for a given type of image?
Was reading this question and got to thinking. How exactly can you determine what the best resampling solution is? I have a concept, albeit somewhat vague, of what the basic methods do.
Are there ...
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3
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How to preserve detail when downscaling scanned photos?
I'm mixing analog with digital photography — I tend to take better photos when I can't look at a small digital screen, unconsciously forcing me to take the picture before I shoot instead of checking ...
- 391
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11
answers
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What program can automatically resize & crop a folder of images to a certain resolution?
I'd like to take a folder of images of various sizes and have them cropped into a 600x600 grid square, cut out from the middle of the image. Is there a program that can automatically resize and crop ...
- 119
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6
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Is it possible to scale up an image to increase the the pixel density?
I have taken a picture whose resolution is less. I can resize the image easily (i.e I can scale to higher resolution) but the image quality goes for a toss, which is true because the image might not ...
- 1,727
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3
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How to resize RAW image files without converting to JPEG?
How can I resize RAW image files (.NEF) from 12 Megapixels to about 5 megapixels without converting them to JPG?
- 209
10
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5
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How can I detect upscaled photos?
I have a collection of JPEG photos, each 500 to 600 pixels on the longest side. How can I detect which ones have been algorithmically enlarged from a substantially smaller photo?
An online ...
- 361
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2
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What DPI should I resize my image to for best printing quality?
And my apologies if this sounds a bit too basic but I can't get my head around this.
I have a digital image I took with my camera. 4000x3000 pixels, and GIMP claims that its resolution is 72x72 DPI.
...
- 203
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votes
1
answer
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At which point do cameras scale photos down when using quarter sensor resolution?
My Nikon D5600 sensor can deliver 24MP but I configured it to just use 6MP. At which step in the process does the camera "scales" the images down?
Maybe already at sensor level? By calculating an '...
- 173
6
votes
3
answers
1k
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Is this article correct about gamma error in picture scaling in common software?
That is kind of a "please proof-read an articles conclusion"-question. Some time ago I found this page: Gamma error in picture scaling.
I grasp the point, that the luminosity-curve is not linear and ...
- 3,386
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5
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How can I resize more than 2GB of travel photography with no quality compromise?
I have more then two gigabytes of travel photography. Each image takes up than 4 to 5 megabytes. I have to send them to some one. How can I resize all images while retaining high image quality?
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3
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How can I resize Raw images and store them back in the original format?
I have some raw images captured using Canon,Nikon,Minolta cameras.(*.CR2, *.NEF, *.MRW)
I want to change resize them and store them back as the original format.
I checked in two tools, Canon Digital ...
- 1,219
5
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3
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322
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How to resize a photo?
I know this is really a noob question, but it has always confused me. If something says "Images must be 210 px high and up to 375 px wide." how do I do that? I assume one uses a program to do it, but ...
- 139
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3
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How can I downsample high-resolution shots with Lightroom?
I have many casual travel shots taken with a high resolution camera. I want to take the shots with high resolution because I'm not sure on beforehand if I want to print big or crop.
After reviewing ...
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2
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706
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Is creative sharpening before resizing a mistake (if you're following the sharpen after resizing methodology)?
I've read about 'creative sharpening', a step in between raw sharpening and output sharpening, but it strikes me that this goes against the principles behind sharpening after you resize.
If you ...
- 449
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votes
2
answers
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Why does text in a photograph become blurry when I downscale the image?
Recently I created a website where I sell books. I captured some images with a Canon EOS 550, and then I resized them according to the website space, but when I resized the original picture, then the ...
- 163
4
votes
2
answers
796
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Are there any downsides to scaling down unsharp images?
To keep my personal image catalog compact, I am considering scaling down all images that are unsharp for one reason or another, but are interesting or valuable enough not to delete them altogether. I ...
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2
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995
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How can I export reduced resolution RAW files from Lightroom?
I read that in Lightroom 4 is possible to export reduced resolution raw files.
Does anybody know how to do it?
- 213
4
votes
3
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Superimposing photos and thermographic images
I have two cameras: one is a "visible" camera and the other one is a thermographic camera, which, as many of you may know, it is a camera that captures infrared radiation instead of visible light.
I ...
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2
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How to resize images in place in Lightroom
Generally, I take and store all of my images in RAW in Lightroom. If I capture a beautiful moment, I want to be able to access all of that beauty at any time in the future.
But there are exceptions. ...
- 197
3
votes
1
answer
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Should I resize photos before or after image optimization?
I am a software dev who appreciates stunning imagry in sites I build, but am also very conscious of page size. My workflow has me adjusting image sizes to the maximum resolution they will be displayed ...
- 133
3
votes
3
answers
264
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Which is sharper, theoretically - small image at 100% or large image re-sized in Photoshop?
I take macro shots of watches and post them on the web (not intended for printing), typically 640x480px. I've been composing those shots in the 1504x1000px frame so that it shows the required size on-...
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3
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How to remaster images from an early digital camera?
Background: I've got a lot of old photos taken by my first digital camera Epson PhotoPC 600 from 1997 and I'd love to make them look as good as possible. I do know they'll never look like those from ...
- 2,183
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1
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163
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Is there a tool which will resize photos based on level of actual detail in the original?
As part of my organisation workflow I like to scale down images where the quality of the photo is not making the most of the resolution (due to camera shake, low light graininess, or whatever). Is ...
- 273
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votes
2
answers
1k
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How does the resize option 'bicubic auto' in CS6 incrementally upscale images?
It's been demonstrated that upscaling incrementally improves image quality, Empirical Study: Extreme digital upscaling, and that thread also shows that choosing 105% increments versus 110% increments ...
- 449
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1
answer
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Does reducing JPG resolution decrease, increase, or have no effect on image quality?
I'm getting ready to download a bunch of images from microstock photo agency Dreamstime. I'll eventually want most of the images in the 400x300 pixel range for my website when I'm done working with ...
2
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3
answers
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Can I increase the resolution of a six-megapixel photo to print on a large canvas?
I took a photograph and the information tells me it is 3008x2000 and 2.2 MB. It's a darker image of two people and their reflections in a window. I'm trying to get it printed on a canvas by ...
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2
votes
4
answers
295
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Is photo sharpness different at different sizes?
I've been reading a lot about image sharpness lately. The only thing I haven't seen discussed is photo size. I know that when you zoom in on a photo, it becomes pixelated quickly. So would the ...
- 486
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3
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543
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What are the advantages of editing a larger image?
If I have an image which is 2000px by 2000px, and the same image at 500px x 500px, what are the advantages of editing the larger ...
- 718
2
votes
3
answers
166
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How do I correctly enlarge thermographic images for web use?
I'm helping a friend of mine who owns a company that does infrared analysis of structures.
He wants to put a gallery of thermal images on his website, but his extremely expensive camera only takes ...
- 121
2
votes
3
answers
264
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Does size reduction in a fine quality JPEG photograph introduce noise?
Does size reduction in a fine quality JPEG photograph introduces noise?
I use Gwenview to reduce the size of the JPEG photographs. Does that cause some noise introduction?
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2
votes
2
answers
436
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Simulating increasing image distance
I have a set of aerial images, but no information about the original camera or angular resolution of the photos. I need to in some way decrease the resolution of the images in a way that simulates ...
- 123
2
votes
1
answer
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Expand Canvas and Extend Edges of Image to Fill It
Hopefully this is the right place to ask this type of question. I am editing a digital photo (in gimp), and need to increase canvas size slightly.
At one point, I was watching a tutorial where they ...
- 121
2
votes
2
answers
502
views
Tools or methods to extract frame from video which is of higher resolution by combining multiple frames
With a stationary video zoomed in, if watching as a human, more details can be "seen" over multiple frames because we're able to tune out noise and/or combine slightly shifted detail into one coherent ...
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2
votes
2
answers
258
views
High vs low res original image, both later scaled to equal lower resolution - difference in sharpness?
If I take a Canon 5DS R (50.6 MP), which has high resolution and no anti-aliasing filter, and then I take a Canon 6D (20.2 MP) and shoot the same scene with both, both using the same capable lens (i.e....
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3
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If image I change an image from 72dpi to 300dpi, can I scale it up size without losing quality? [duplicate]
Title says it all. When I change my image from 72dpi to 300dpi, the image gets smaller. Can I scale the image back up and print it out at 300dpi without sacrificing quality?
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vote
3
answers
262
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Do I have to resample images when resizing them (smaller)?
Do I have to resample images when I'm resizing them? I want to make them smaller.
- 113
1
vote
1
answer
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How to scale up an image for print. How large can i go? [duplicate]
I have an approximately 2500 pixel x 3500 pixel image. How do I figure out the largest print that I can get from it? At the 300 dpi printing standard that would only yield about 8x12" but I need ...
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vote
2
answers
511
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How do I compose an image for use as a browser background or wallpaper on a widescreen monitor?
I want to use some of my images for the background of a web page in my browser and for computer desktop wallpaper on my widescreen notebook.
When I use a (landscape oriented) picture as is (in a ...
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1
vote
3
answers
223
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How to post process a B/W photo to improve printing
I'm willing to print a black and white picture with quite big dimension (more or less, 3x2 feet), but the image has pretty low resolution and appears quite blury. I was wondering which kind of post ...
- 211
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2
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Options to double image dimensions of artwork photo? [duplicate]
I have some high-quality RAW files of artwork that I've processed with some cropping, contrast adjustment, etc. I'd like them to be printed on metal at about 2'x3', which is about twice the size I get ...
- 503
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vote
3
answers
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How to transform a picture with reference points on another picture?
I don't exactly know how to describe the problem. I have two maps that partly show the same extent of a place, but on the whole, the scale, rotation and protection might be different.
I still want to ...
- 111
1
vote
1
answer
894
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Photoshop and mac not printing correct size?
Probably a silly question but any help appreciated.
Trying to print from photoshop CC on MacBook to Epson 9600. Images printing smaller than expected. For example, I've just tried to print a 6x8" ...
- 21
1
vote
2
answers
112
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resizing a picture [duplicate]
I entered a charity calendar competition and the picture of my cat won, but when they tried to make it larger to put on their 2016 calendar it wasn't a good enough quality. It was blurred. I was ...
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0
answers
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What my PPI should be set at for others to download my photos? [duplicate]
I sell my photos on Etsy for others to buy and download and I'm trying to figure out what I should set my PPI at and if I should resample when I do it...it is all very confusing. I'm reading all ...
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4
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11k
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How to scale up a photo? [duplicate]
Possible Duplicate:
How can I upscale a low-res image to make it appear higher-res?
I need to scale up a small photo to the 3x of the original size.
What method is common to become the best ...
- 1
0
votes
1
answer
346
views
Photo quality if you upscale a low-quality photo with Gigapixel AI then downscale back
Gigapixel is a program by Topaz Labs that is able to enlarge small and low-quality (pixelated) photos, while enriching them with higher quality details (between and within the original pixels) by ...
- 594
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