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

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36
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5answers
21k 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, ...
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 ...
7
votes
4answers
6k views

Convert many images to one PDF

How can I convert about 100 PNGs to one PDF on a Mac? I'm open to using the command line if it helps. I have tried using iPhoto, but it quits, not sure why. Saving from Preview doesn't quite do what ...
1
vote
2answers
34 views

Convert PNG to Multi-page PDF

I've seen a lot of posts about how to convert a multi-page PDF to PNG but I'm wondering how I can go in the opposite direction if I have the size of each page I want made.
1
vote
2answers
16 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 ...
0
votes
0answers
36 views

avconv and ffmpeg: errors reading png files

I'm trying to use avconv to overlay data onto a video. I generate PNG files representing the overlay data at 4fps. The PNG files are the 120px wider and 60px taller than the original video, because ...
114
votes
6answers
14k views

How is PNG lossless given that it has a compression parameter?

PNG files are said to use lossless compression. However, whenever I am in an image editor, such as GIMP and try to save an image as a PNG file, it asks for the compression parameter, which ranges ...
5
votes
1answer
2k views

How do I convert (.gif to .png) this image to get the original view?

I am trying to convert this image, http://en.wikipedia.org/wiki/File:Dijkstra_Animation.gif, to a series of .png files. This was pretty simple, I used the convert command in Linux, convert ...
1
vote
3answers
161 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 ...
1
vote
0answers
22 views

LibreOffice has ugly PNG import

I'm trying to import a PNG graphic exported from Inkscape (I tried importing the SVG directly but it doesn't work: the text is missing and replaced by black boxes) in a LibreOffice document, but it ...
3
votes
1answer
198 views

Do PNGs compressed multiple times require multiple decompressions?

If my PNGs get compressed multiple times, do they need to be decompressed the same number of times? I need my PNGs to load darn fast.
0
votes
2answers
8k 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 ...
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 ├── ...
42
votes
9answers
39k views

How to convert a PDF document to PNG?

Is there a free way to convert a PDF document to a PNG image?
64
votes
7answers
70k views

Batch converting PNG to JPG in linux

Does anyone know a good way to batch-convert a bunch of PNGs into JPGs in linux? (I'm using Ubuntu). A png2jpg binary that I could just drop into a shell script would be ideal.
2
votes
3answers
1k views

Is there a Photoshop plug-in that reduces PNG file size using pngcrush? [closed]

I’ve used pngcrush to reduce the size of PNGs produced by Photoshop. It’d be neat if there was a plug-in for Photoshop that ran pngcrush automatically on PNGs when saving them for the web. Is there ...
10
votes
9answers
23k 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: ...
36
votes
11answers
28k 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 ...
20
votes
7answers
37k 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 ...
1
vote
1answer
14 views

I would like to batch change one colour in a group of PNGs. Mac - freeware software

I hope someone would be able to help me. I have a group of icons in png format. They are all transparent backgrounds with one colour for the actual icon. I would like to change this colour in all of ...
1
vote
1answer
175 views

how to remove a png file's background using paint.net

I have a png file that is composed of only two colors: white and dark. Majority of image space is occupied by the white color but I want to remove this white color, thus giving the image a transparent ...
28
votes
8answers
37k views

JPEG vs PNG vs BMP vs GIF

I would like to know which one of these formats requires less memory for the same quality of the picture, and what are the main differences between these formats.
0
votes
3answers
615 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 ...
13
votes
4answers
15k views

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

How do I convert a multi-page PDF file to PNG files, and automatically save one PNG file per page of the PDF document (for Windows 7)? I have tried virtual printers (CutePDF, Bullzip PDF Printer) and ...
4
votes
4answers
9k views

Get pixel dimensions of a PNG on my Mac?

I have a random .PNG file on my Mac. Actually I have about a hundred of them. What is the easiest way to get the pixel dimensions? (I.e, 100 pixels wide and 50 high, or whatever).
0
votes
2answers
1k views

convert serveral image files to a single djvu file

Suppose I have serveral BMP image file, say 001.bmp, 002.bmp,..., 100.bmp. I want to convert these files to a single djvu file, whose first page is the content of 001.bmp, the second page is the ...
5
votes
4answers
2k views

How to open huge PNG image [duplicate]

I have a really big PNG image, it's ~11GB. Is there any way to open it? I would just like to view it without too many problems. I tried Photoshop CS6 and it's too big even for this kind of modern ...
3
votes
2answers
457 views

Windows 7 doesn't show image size for all images

On Windows 7's new file layout in Explorer. Some PNGs will show the size whereas others won't. I've tried rebooting and clearing the cache, but it doesn't work. Also, all of these images were saved ...
1
vote
4answers
562 views

How do I rescale large images?

How do I reduce the dimensions of large .png images? I've tried GIMP, Paint.NET, and IrfanView, and they work well for smaller images but won't even open larger ones.
2
votes
5answers
365 views

Mass rescaling of PNGs

I have a bunch of PNG files that I want to rescale. Oversimplifying a little, let's say I have files named: apple@2x.png orange@2x.png pear@2x.png and so on, and I want to make: apple.png ...
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 ...
8
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: ...
9
votes
3answers
12k 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?
0
votes
1answer
112 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
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
741 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 ...
9
votes
7answers
19k 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
46 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 ...
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
3answers
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 ...
1
vote
2answers
491 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
123 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
103 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
37 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
12k 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
77 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 ...
6
votes
3answers
5k 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 ...
0
votes
1answer
278 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
469 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?