Questions about the amount of detail and information contained in an image.

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18
votes
9answers
101k views

Facebook: Ways to preserve image quality of uploaded images?

After uploading an image, Facebook converts it to a new image. Their conversion process introduces artifacts and mottling to the magenta-ish parts of the image. Original image: Facebook's ...
5
votes
4answers
154k views

How can I increase the size of a .jpeg without losing quality?

Is it possible to make a .jpeg photo larger without losing "quality"? I have a photo that is 450px x 750px and would like to make it 3 times bigger for web not print? I've been told that Illustrator ...
9
votes
8answers
8k views

Techniques to dramatically scale an image

I have been given an impossible task: Take a picture image (jpg) at 1422 x 1067 px with 100 dpi and scale it to 86400 x 29376 px (that's equivalent to 34ft x 100ft or 30.5 meters x 10.36 meters) ...
7
votes
3answers
37k views

Email signature hell--How to include a logo image and have it stay sharp?

I found a couple useful threads on this forum with respect to the issues posed by (displaying) images in email signatures-- here, for example-- and I've searched all over the web, but still have not ...
3
votes
1answer
88 views

put partly transpared photo on top of panorama

What is it nessesary to do if I want to see just black edges from background image in image placed on top? Here are links to source images This is what I want to create: You can see there are ...
9
votes
4answers
173k views

Reduce file size without losing quality

I would like to save files in Photoshop but keep them as small as possible. I use Save for Web (and Devices) and save as a JPEG. Here are the settings I used: I really do not want to lower the ...
3
votes
3answers
6k views

MacBook retina Photoshop save for web

I am, like so many other graphic designers, very excited about the new MacBook 15" with retina display. But there is one thing that I really am concerned about. With 4 times the pixels as on ordinary ...
3
votes
1answer
2k views

Tools or methods for optimizing favicon appearance?

I often must create a favicon for a fairly complex image, that when it gets down to 16x16, looks weird or blurry. I have been trying with one image, reduced with bicubic-sharp in Photoshop and ...
2
votes
3answers
9k views

Save for Web in Photoshop with custom DPI

I am writing user documentation using DITA which allows me to easily generate deliverables in PDF, CHM and web formats. The images need to be saved with a DPI of 110 so that they are displayed ...
1
vote
1answer
917 views

Skew transform severely distorts screenshot - any workaround?

I'm trying to create the image below where a screen (640px x 960px @ 72ppi) is shown on a stock photo of a device. Is there any way to maintain high quality of the screenshot on the device? I used ...
4
votes
4answers
15k views

Will changing image resolution from 300 to 72 without resampling reduce the quality?

This is a rather stupid question so I apologise in advance but I just wanted to be 100% sure! I have a set of photos at 300 ppi that are 800 pixels by 800 pixels and need to convert them in Photoshop ...
2
votes
5answers
687 views

What is the purpose of the resolution property of images (when creating/editing)?

I want to check something I don't quite understand with the size/quality properties of an image. OK, as much as I understand, the size of an image you create in Photoshop, for example, will determine ...
2
votes
5answers
7k views

Photoshop 3D object looks high quality only when moving it

I am working on some textures for 3D .obj files in photoshop cs6 extended. The objects look pretty pixelated and low quality, but when I move the object mesh, or scene, or camera, it instantly renders ...
2
votes
4answers
5k views

How can we talk about the “resolution” of a JPEG file?

A JPEG is characterised with three parameters: width (pixel), height (pixel) and bit depth (bits per pixel). And resolution is a characteristic for output devices, e.g., monitors or printers. Why? ...
2
votes
1answer
2k views

Photo distorts terribly on Facebook [duplicate]

I've designed a logo which looks high res in photoshop. But really distorts in Facebook. I understand that Facebook converts the image, but compared to similar logos, it looks bad. Any ways around ...
1
vote
4answers
25k views

Resizing/shrinking .JPG files without losing quality?

Im using Gimp to resize images. When using a high res image normally 4500 x 2994 i usually need to shrink this image to 325 x 130 pixels. As you can imagine i loose the shiny, glossy and high res ...
0
votes
1answer
2k views

Gimp: how to remove background noise/artifacts and enhance handwritten text

I have a lots of scanned handwritten lecture notes (PDFormat) and I want to improve their readability (I have uploaded an example). In particular I'd like to remove the "squares" on the back. I would ...