PNG (portable network graphics) is a popular image format that supports 32-bit colors and transparency.

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7
votes
4answers
3k views

Why are PNG-8 files mangled when opened in Photoshop?

Why are some 32 bit PNGs opened in Photoshop with Indexed Colors and no transparency? For instance, I grabbed a png icon file of the Stack Overflow logo at: ...
0
votes
1answer
2k views

How can I create a 24-bit PNG with alpha and no transparency in Fireworks CS3?

We're creating icons for a mobile app, and the developers have asked for very specific files. One needs to be 48px x 48px and has to be a 24-bit PNG with alpha and no transparency. I'm using ...
0
votes
0answers
12 views

Increase masked area size from PNG

I have a simple outline style icon in PNG format, which consists in a plain background color with a masked area that determines the icon's viewable area. I need to smoothly increase the size (or ...
7
votes
3answers
11k views

Can't see PNG previews in Windows 7?

I´m using Windows 7 x64. I can see the .jpg, .gif, etc. preview thumbnails but if .PNG, I only see the generic image, and not the image preview like in the other formats. What can I do to fix this?
11
votes
4answers
14k views

How to convert a multi-page PDF file to PNG files, with one PNG file per page of the PDF document (Windows)

Is there a software that could convert a multi-page PDF file to PNG files, and could automatically save one PNG file per page of the PDF document (for Windows 7)? I have tried a few virtual printer ...
39
votes
9answers
37k views

How to convert a PDF document to PNG?

Looking for a free way to convert a PDF document to an image.
0
votes
2answers
451 views

Transparent texture rendered as black

I'm trying to render a scene with transparent png. The scene is actually imported from a .obj file (with another .mtl file), which should technically applies the transparency for me. ^ It does ...
0
votes
2answers
7k views

How to change the colour of a png image in any adobe software

I have a logo that is a process color and I need to change it to a pantone colour. The only way I could change the colour was if I live traced it but I lost some detail. So I was wondering if there is ...
0
votes
1answer
53 views

FFMPEG combine PNGs of different size into movie

Is it possible to combine PNG of different heights without rescaling (like tile does)? I have pairs of images of same width, but first has height 900px and second 200px. I would like them to merge ...
3
votes
1answer
2k views

How do I merge a folder of PNG images to a mp4 movie using avconv?

I have a folder containing many time stamped PNG images which I'd like to merge to a short movie. The contents of that directory looks like this: └── images ├── img_20130421_115547.png ├── ...
3
votes
1answer
3k views

PNG alpha rendered as black in Blender

I'm a Blender novice, so this is probably easy to fix. When I use a transparent PNG as a texture in Blender, the parts that should be transparent are rendered as black. This is especially confusing ...
0
votes
0answers
153 views

correctly sizing PNG images in markdown with pandoc for html/pdf/docx

I am trying to use markdown with pandoc to convert a single document into html, pdf, and docx. It's an extremely simple document containing only math-less text and a few images. The images are in ...
0
votes
1answer
8 views

PNG file has different colours in different Programs

I downloaded an icon from Icons8. With their tool i recolored it to dark blue (#2c3e50). After unpacking and uploading the 48px icon I got the following result: As you can see the color is not ...
9
votes
7answers
17k views

Multiply blending mode to PNG

I have a layer in Photoshop with multiply on, when I however save to web it loses the blending mode. How can I keep multiply or achieve the same effect in another way?
1
vote
1answer
45 views

Postscript to png conversion loss

When converting Postscript files to PNG, is there any loss of fidelity in the converted files? The postscript files are scanned at 1200DPI. If there is such loss, how can it be kept minimum? I'm ...
8
votes
7answers
19k views

How to reduce PNG file size for web?

I have a PNG-24 file with transparent background and its current size is 1.5 MB. How to reduce size or use PNG-8 file format and keep same quality ? PNG file fro here: ...
2
votes
4answers
2k views

How to change DPI of a PNG file? (in command line, without ImageMagick)

I am looking for a way to change the DPI on PNG image files. Using ImageMagick this is easy: $ convert -density 150 -units pixelsperinch file.png file.png The problem is that I will run this ...
19
votes
4answers
3k views

Is it possible to store arbitrary data in an image file?

Is it possible to store arbitrary data such as documents or a program in the form of an image file, such as a PNG image? My concern is that someone could encode data for use by malware into an image ...
29
votes
4answers
19k views

How do I convert an SVG to a PDF on Linux

How do I convert and SVG (containing a a few words of latin text and some simple vector graphics) to a PDF on Linux? I tried Inkscape 0.47 on Ubuntu Lucid, but it moves some sub-graphics randomly, ...
1
vote
2answers
169 views

File Attributes - AI …Any clues?

Can anyone point me what does it mean when a .png file having 'AI' as File > Properties > Details > Attributes. Does it mean it made with Adobe Illustrator ? Also note that the png is 8bit image.
2
votes
1answer
65 views

PNG/BMP images become blurred on zoom

I recently installed a Debian Jessie desktop and when opening PNG/BMP images it all becomes blurred on zoom (in or out). With the image at 100%, everything looks sharp as expected. This happens both ...
2
votes
1answer
75 views

How can I explode an animated PNG?

Websites like GIF Explode allow you to "explode" an animated GIF into its component frames, and similar results are presumably easy to achieve with standard image-editing tools like GIMP, ImageMagick, ...
4
votes
2answers
3k views

Pdfcreator print file to multiple images (.png)

I am using pdfcreator. It installs a virtual windows printer that saves the file being printed into the desired format. I want to save my printed documents as multiple image files. (.png). I ...
1
vote
0answers
33 views

ImageMagick: is there a way to get the same PNG from the same image on multiple platforms?

I have a script for converting game assets to multiple resolutions, via imagick, and when I run the same imagick commands on Mac and Windows (with the same version of imagick - ImageMagick 6.8.7-2), ...
12
votes
3answers
11k views

What software can I use to read png metadata?

I know that I can create a simple little Qt based application that adds and read png metadata, using the QImage.setText(...) and QImage.text(...). That metadata can then be read with a linux command ...
1
vote
2answers
50 views

How can I create an MNG file out of PNGs?

I am really struggling to find compatible software that will allow me to animate PNG files. The GIMP plugin crashes my GIMP. Nothing else supports it. Is there any way I can easily put together the ...
4
votes
3answers
4k views

How to convert GIF files to PNG or JPEG in OS X with command line?

I have 10k+ GIF files that I need to convert to PNG or JPEG preferably using command line so that I can automate it. I'm not worried about losing quality or transparency, just need to prepare files ...
17
votes
7answers
35k views

How can I save a graph to a PNG or GIF file in Microsoft Excel?

How can I save a graph to a PNG or GIF file in Microsoft Excel? I know I can save as an HTML file and use the image created there, but I suspect there is a way that doesn't create other clutter of ...
30
votes
10answers
25k views

Command-line application for converting SVG to PNG on Mac OS X

Are there any command-line programs that can convert an SVG to PNG, that run on Mac OS X? Edit: Dylan B had a good answer with ImageMagick. For reference, to install ImageMagick with SVG support on ...
0
votes
1answer
117 views

Why are there no video formats that support transparency?

Why are there no [widely supported] video formats that support transparency? For example, the PNG image format supports transparency, allowing for some interesting effects in websites and documents. ...
1
vote
1answer
444 views

How to setup default interlacing for PNGs in Photoshop?

Every time I want to save a PNG in photoshop, asks me what type of interlacing I want. Is it possible to set the default to None and never hear about that dialog box again?
6
votes
1answer
2k views

Is it possible to make a .png (or other) image that does NOT have rectangular dimensions?

This might be a dumb question, but is it possible to make a .png file that isn't square? If so, how can one do this in Gimp? Ideally I'd like one in the shape of an X.
1
vote
2answers
357 views

Why would PNG format images be stopped by a mail client?

I tried to send someone an email with a PNG format image attachment but it was stopped by their email filtering software (messagelabs). They said I could send them the image in a JPG or ZIP format ...
0
votes
2answers
67 views

Do more compressed PNG images take longer to load?

When I create PNG files with very small disk size, I tend to wonder if the file size becomes less important than the time viewers would need to decompress the image. Technically that would be trivial ...
0
votes
1answer
126 views

How can I convert a large PDF to PNG?

I want to convert a very large PDF file (>2GB) to a PNG (or JPEG) file so that it is easier to open and look at. I want to do that without opening the PDF file since it is too large to be opened. Is ...
2
votes
2answers
291 views

PNG displays differently in Firefox

Currently I'm working on a website with some bright colors. I'm trying to implement a seamless overlay on top of a few images, to give the sensation that the background is flowing over the image, ...
2
votes
2answers
258 views

Why shell commands for PNG file in Windows 8 doesn't work?

I have exactly same task like here: Windows 7 - Add shell command for .png file But this solution doesn't work in Windows 8 for unknown reason only for PNG files. And I don't know why. I tried some ...
0
votes
1answer
70 views

Transparent regions of pasted png display as black in Inkscape

If I copy and paste, for instance, this image from Chromium or Opera webbrowsers into Inkscape, the regions which should be transparent are rendered as black, like so: How can I avoid this?
4
votes
2answers
638 views

Create a .png with zopfli

I wanted to give zopfli a try since I have some static .png's that I am using on a website. I see how I can create .gz and .deflate-files. But how can I create a png that can be displayed in FF, ...
544
votes
5answers
70k views

Why does this PNG image display differently in Chrome & Firefox than in Safari and IE?

Check this image out: On Chrome and Firefox it will show as a pear. Now, try to save it and look at it saved on your desktop. Also, try viewing in Safari or Internet Explorer. It will display ...
2
votes
2answers
397 views

PNGs with Black Backgrounds

Why is it that when I copy/paste PNG files with a transparent background into photoshop that they show up with a black background, whereas if I save them, then open they're transparent? I find it ...
1
vote
4answers
2k views

Make Thunderbird 3 paste inline images as GIF or JPG instead of PNG

I send email to people whose mailers don't show PNG images correctly, so it seems to them that I sent no images inline at all. In thunderbird, I can't see any options to paste inline images as GIF or ...
4
votes
1answer
12k views

Is there any quality difference between PNG vs BMP image formats?

I have just learned that PNG is a lossless image format while BMP can be both uncompressed or lossless format. Should there be a quality difference between these two? If not, does it mean that other ...
0
votes
1answer
124 views

Why do light edges appear on transparent PNGs online?

Everytime I try to use transparent PNG images on sites, white edges keep appearing around the images, seen in the photo below. How come this is happening, and how do I stop this from happening? ...
11
votes
2answers
9k views

How to create an uncompressed AVI from a series of 1000's of PNG images using FFMPEG

How can I create an uncompressed AVI from a series of 1000's of PNG images using FFMPEG? I used this command to convert an input.avi file to a series of PNG frames: ffmpeg -y -i input.avi -an ...
0
votes
1answer
140 views

Unable to plot png in gnuplot

i need to plot png files in gnuplot 4.6.3 and/or 4.6.4.I am unable to do so as set term does not list "png" as an option. system information is Linux masterx-Studio-1535 3.5.0-27-generic #46-Ubuntu ...
0
votes
1answer
291 views

gnuplot not working on ubuntu

My initial problem is that i am unable to find png as list of terminals in set term. So using the link http://askubuntu.com/questions/393882/png-terminal-in-gnuplot, I installed the gd library.And ...
15
votes
4answers
27k views

How to read Fireworks PNG multilayer files without Fireworks

I recieved a couple of Fireworks PNG files. Fireworks has a special format for saving several source images in layers in the png file. How can I read these without having Fireworks installed? (im ...
1
vote
1answer
205 views

How to make SVG in Inkscape really scalable?

I wanted to know how to make SVG from a raster picture in Inkscape. I am in Wikipedia which uses lot of SVG's so I want to make a few. I know how to track those PNG and export the bitmap results as ...
0
votes
0answers
146 views

Using Ghostscript, can an image output be scaled prior to “printing”?

I'm working on a project where par of the requirements are to convert the first page of a PDF to a PNG. This in and of itself is relatively simple, but I've yet to find a way to scale the resulting ...