Questions tagged [image-format]

Questions about image file formats, a standardized means of organizing and storing digital images. Image files are composed of either pixel or vector (geometric) data. Common image format include JPEG, PNG, GIF, TIFF, EPS, SVG and many more. Ask anything about file formats that's relevant to graphic design.

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2 votes
3 answers
2k views

Should I generate report graphics as PDF or SVG for 70% web, 30% print users? Or PNG?

As a database guy, I hope my design-n00B question isn't noise! I have some moderately complex data for which I want to generate (2-D) graphic representations on demand and also at intervals. I ...
1 vote
1 answer
95 views

How to draw high-resolution images on client-side?

Any libraries, API, or tips are welcome. I am trying to draw Landsat 8 images using Canvas utility of Javascript on my browser. The grayscale reflectance values for Landsat 8 bands are from minimum -...
3 votes
2 answers
2k views

Why is image size becoming larger after cropping it in PS?

I am using photoshop to crop Youtube preview images like this one, which is a .jpg file, the url being "http://img.youtube.com/vi/g-LvhmaHEWA/0.jpg" Originally it is 480*360 and about 25k on disk, ...
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2 votes
1 answer
4k views

GIMP: exporting as .png does not produce an image with the specified dimensions in "Scale image" or "Print size"

Let us say that I have a 600x600 pixels picture and I want to create a .png file with it that is 6x6 cm in size. What I do is to set the following in "Image->Scale image": I can check in "Image->...
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1 vote
1 answer
5k views

Better way to save photos in InDesign so that they print in higher quality when turned into PDF's?

I create my newsletter in InDesign, and then save it as a PDF. I typically print a few copies from Adobe Reader, but no matter how high quality I set the printer at, my photos always look horrible and ...
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0 votes
1 answer
85 views

how to calculate the rate of loss of colors?

JPEG is said to be a lossy quality image format so most people prefer PNG. When JPEGs are edited it seems the quality does degrade(it's demonstrated well in the documentation of GIMP). How can we ...
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1 vote
0 answers
117 views

How to properly create and save for web animated slides with text on image background

Following on from this question PNG vs. GIF vs. JPEG vs. SVG - When best to use? regarding mr. @ChuckLeButt 's answer. I have a situation trying to create and save for web a few picture slides ...
1 vote
0 answers
52 views

What are the relevant ratios for converting to square ratio

I'm building an application that collects images and convert them to a square ratio images for usage as avatars in social networks. I want to understand what is the range of image ratios that I can ...
0 votes
2 answers
460 views

Crop image background out? [closed]

I just started using photoshop today, and this is my first question in Graphic Design, so pardon me if this is a simple question. I have bee researching for about two hours now, on how to crop out the ...
-3 votes
1 answer
3k views

what size should i use to print a shoppin bag? [closed]

I need to design a shopping bag. What sizes should I use for printing? It's a vertical bag. I know the sizes may vary according to shape. What font sizes that should be used? What file format should ...
1 vote
0 answers
464 views

What image dimensions to choose for mobile and desktop in 2015?

I am working on a portfolio website for a friend showcasing the work in a gallery with photoswipe.com. Just got the original photos delivered. They are between 70 and 100 mb and range from 2551x5124 ...
3 votes
1 answer
200 views

How can I make a png's Alpha contain undetectable colours?

Okay, I'll try to make a long story short. I use PS elements 8 (yeah I know that barely counts a PS). I make textures for a video game mod, and I came across a problem. To help explain I quickly put ...
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0 votes
1 answer
7k views

Reduce BMP file size without losing quality

The input file format is BMP. The required output format is BMP. I do not want a reduction of size or quality, but I want to reduce the file size. How is it possible?
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1 vote
1 answer
159 views

Illustrator image size info

I try compression to used images. How can i see images size (like 15MB, 20MB) to in my Illustrator file. Links window not show embeded images size.
17 votes
3 answers
8k views

Why do people use JPG images?

I see JPG images everywhere. But why? PNG files have opacity, while JPGs do not. I've tried exporting some images to PNG and JPG to compare size, and they both either match up or the PNG is smaller(...
0 votes
3 answers
133 views

How can I optimize my graph images for my website?

The graphs are terribly detailed and include text for identification. These graphs are created in Visio by engineers then passed to me for website article creation. I normally take the graph file, ...
0 votes
2 answers
33k views

Importing transparent background PNG in CMYK

So I have Illustrator document in CMYK mode intended for print. I need to import PNG image (because I need to place object extracted from the background). And here I step on the unknown area because I ...
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3 votes
2 answers
17k views

Saving an 8-bit grayscale image as a 2-bit image

Assuming there's an 8-bit grayscale image; what's the simplest method to save it as a "2-bit per pixel" image? Is it a binary image or something else (like a colormap image)? In the case of binary, ...
0 votes
0 answers
85 views

Image processing automation - filter square images

How does Photoshop treat a perfectly square image? Are they considered a Portrait or Landscape? I need to automate some image processing and I need to filter out perfectly square (aspect ratio 1:1) ...
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37 votes
6 answers
40k views

Can I reduce the file size of an SVG to be closer to its JPEG equivalent?

I have an image that I’m using on a website. I would like to use an SVG so that it can be any size and still look crisp. This dropbox contains the SVG file as well as the original Illustrator file. ...
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2 votes
2 answers
44k views

How to reduce file size of animated GIF?

I'm making an animated GIF web ad that needs to be 40KB or under. Unfortunately the one I put together is much larger than that. How can I reduce the file size without losing too much image quality? ...
2 votes
1 answer
514 views

Can you include retina and non-retina images within the same sprite?

When building a web page, I've always created 2 different sprites for my icons. A sprite for normal images and a sprite for retina images. The retina images are saved out twice the size and twice the ...
7 votes
3 answers
65k views

What does rasterization do to an image?

What is the general purpose for making or converting graphics / images to a raster format? What happens to an image when it is rasterized?
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1 vote
1 answer
6k views

How to differentiate 24 Bit PNG and 32 Bit PNG file?

When image is encoded in PNG format, it can be encoded either in 24 bit format (rgb) or in 32 bit format (argb). Both the files appear as .png files. Then how it is possible to differentiate these two ...
0 votes
1 answer
603 views

Change contrast/colors, etc to multiple selected images

I have a simple request, but can't seem to find the answer online. I want to change the colors of each of these green tiles to red. When I selected all images, my Image > Adjustments tab is grey'ed ...
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1 vote
1 answer
1k views

Is there a way to make an image larger without losing quality?

What's the best way to take the attached 'CobraJet' 72 dpi image and prepare it for inclusion in a printed poster? 1) I tried finding similar fonts 2) I tried blowing image up and blurring it 3) I ...
32 votes
5 answers
12k views

Why are raster images still used when vector images have so many advantages?

I have read some posts and see many advantages of using vector images when compared to raster images: They can be zoomed or scaled at any ratio. File-size efficiency. Because vector image only ...
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1 vote
2 answers
2k views

How do I export a sliced psd file as a single jpeg image optimized for web?

I am a beginner at photoshop and am going a bit crazy here: I have a flowchart and am trying to use the slicing tool to include URLs into my flowchart image. However, when I optimize it for the web ...
  • 11
0 votes
5 answers
32k views

Picture loses quality upon saving in Photoshop CS5

I am using adobe Photoshop CS5, I am transforming my picture into black and white via "Calculations" and then i apply "Shadows and Highlights" filter. It actually looks very good in Photoshop but it ...
1 vote
4 answers
614 views

Which raster image format is better for digitally displaying images when there is no transparency; JPEG or PNG?

I'm trying to determine which format is better to use when there is no transparency in an image. More importantly though, I'm trying to figure out when it's better to use one over the other. From ...
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0 votes
4 answers
35k views

Is there a quick way of batch converting multiple files from JPG to PNG in photoshop?

I made a rookie error and accidentally saved about 20 images in Photoshop as .jpg files rather than .png files. Is there a quick way I can convert all these files to a .png format at once rather than ...
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3 votes
2 answers
366 views

Small JPEG image (just 21.8 KB) without lack of quality — why is that?

This image size is just 21.8 KB without lack of quality. Why is that? How is it done?
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-2 votes
1 answer
1k views

What program can I use to view a .gfa file?

I have a .gfa file that needs viewing outside my simulation program. After google-ing .gfa, I found that it belongs to the Graphics Interchange Format along with .gif. But I have not found a viewer ...
2 votes
5 answers
2k 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 ...
0 votes
1 answer
9k views

What does 8 bit alpha (PNG) mean?

I am trying to follow specs for iTunes app graphic. The requirements state: 72ppi, rgb,flattended, NO transparency High qualtiy PNG plus 8-bit alpha. Everything I read about alpha is WITH ...
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13 votes
3 answers
58k views

What unique benefits does the EPS format provide?

Reading this excellent question regarding logo export formats, and it made me want to ask a question that was a little bit more narrowly focused than that one. I know when to use a GIF and when to ...
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2 votes
4 answers
928 views

Should I, or should I not, consider using an image editing tool other than PhotoShop?

Please forgive the open-ended title. My actual question, I think, is a bit more specific and suited for this site but it is rather difficult to articulate my need in one simple sentence. Quick ...
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10 votes
3 answers
8k views

Is it possible to convert PostScript to SVG? (Inkscape)

Is it possible to convert a PostScript file to SVG? Based on an answer in Tex.SE, I tried to use inkscape: inkscape test.ps --export-inkscape-svg=test.svg This indeed produced an SVG file, but ...
1 vote
2 answers
178 views

Combining elements from multiple PDFs -what options do I have, what tools can I use?

Here is my problem: I am creating mindmaps with Mindjen MindManager (see an example here http://en.wikipedia.org/wiki/File:Mindmanager.png) The problem is that this program has very poor printing ...
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2 votes
1 answer
10k views

Photoshop CS6 export to RGB 565 format

I googled this a bit and found an older post on the Adobe forums but that's for Photoshop CS3. I was looking for the Advanced Mode option but couldn't find it. Is it still possible to save a bitmap ...
3 votes
1 answer
10k views

What image file format is used by Autodesk Sketchbook Mobile?

I have been using Sketchbook Mobile on an android phone a little bit and, being an android (me and the device), I have located the single save file the program allows and make backups of that file on ...
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1 vote
1 answer
867 views

Planning to use different size images across different devices

The current framework I use to design webpages currently doesn't do anything to optimize images across different devices. As I see it, their are four types: mobile, tablet, desktop PC and large ...
3 votes
5 answers
62k views

Illustrator: Converting a letterhead design to Word

I created this letterhead for a client in Illustrator and it got approved. It now needs to get converted to a Word document for internal usage. What's the best way to make this conversion?
2 votes
2 answers
11k views

Best file type of picture for print

I'm doing layout design, pro bono stuff for my uni, and I haven't done much designing lately. But back when I did my high school newspaper I remember what I was told: your pictures must be in .tiff ...
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0 votes
1 answer
631 views

Why am I losing quality when combining two images?

I have a transperent image image1.png that is383 x 133 px, and another background image image2.gif that is 430 x 128 px. I opened both of images in two separate tabs in Photoshop. Then I copied the ...
3 votes
2 answers
411 views

Measuring minimum resolution in Photoshop/GIMP

I am following Apple's iTunes connect guide (as of today 13th November 2013) for designing an image. At page 239 of their guide I am confused on the following: Background artwork must be at least ...
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3 votes
4 answers
73k views

How to Remove Jagged Edge (Aliasing) on a Straight Diagonal Line

This is 120px X 283px dimension, PNG image. When using it in website the same image dimension is set through css but in the browser view it is showing like a saw like this Is it possible to draw ...
1 vote
2 answers
2k views

What software should I use to design clipart pictures of human's performing different exercises?

I am building a database with descriptions and various other information for strength training exercises. One of the most important things is to actually let the user get a visual idea of how to ...
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3 votes
3 answers
12k views

Are there methods for cutting down on file size with animated gifs without decreasing quality?

I'm in the process of replacing a lot of flash content with anything other than flash. Most of it's simple animated diagrams such as the one below: Rather than write javascript each time an image ...
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5 votes
2 answers
9k views

Embedding pdf in illustrator

So, I'm using adobe illustrator for creating vectorial figures, mainly for graphs. In illustrator, creating graphs is not so well implemented, so I'm using another tool to make them (e.g. R, xmgrace, ...