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Questions tagged [png]

Portable Network Graphics is a bitmapped image format and video codec that employs lossless data compression.

PNG is an extensible file format for the lossless, portable, well-compressed storage of raster images. PNG provides a patent-free replacement for GIF and can also replace many common uses of TIFF. Indexed-colour, greyscale and truecolour images are supported, plus an optional alpha channel. Sample depths range from 1 to 16 bits.

PNG is designed for on-line viewing applications, such as the World Wide Web, so it is fully streamable with a progressive display option. PNG is robust, providing both full file integrity checking and simple detection of common transmission errors. Also, PNG can store gamma correction and chromaticity data for improved colour matching on heterogeneous platforms.

97 questions
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Trouble with batch conversion of .png to .pdf using convert

convert /home/bill/TempScan/*.png myfile.pdf gives error message: convert-im6.q16: not authorized `myfile.pdf' @ error/constitute.c/WriteImage/1037. Any help would be appreciated!
bill-lancaster
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How to install libpng and zlib

I'm completely new to Ubuntu. I got installed it because my school uses a lot of Linux type stuff in my school's Computer Science program so I figured I would use Ubuntu on my own machine and just do my code from there instead of the computer labs.…
user313944
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How to create a png with transparent background in inkscape?

Is it possible? A PNG usually consumes less storage space compared to an SVG. Sometimes I need small sized images in sites like Launchpad. When I simply save as PNG, the background remains white, not transparent.
Archisman Panigrahi
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75
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4 answers

Bulk converting images from one format to another?

I want to convert a batch of images, nearly 100, from jpg to png format. How can I do this without renaming them, but instead actually converting the format?
opu 웃
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How do I convert a PNG to SVG?

I'd like to be able to crop SVG chemical structures, completely (see this question), that were created using MarvinSketch and I think I might have thought of a solution; I use MarvinSketch to create a large PNG file, then crop that using GIMP, and…
Josh Pinto
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How to convert CR2 to JPG or PNG?

I need to convert a lot of CR2 photos to either JPG or PNG, no editing. How to do this?
user284848
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GIMP 2.8 doesn't allow to save usual image file formats (jpg, png) via Save dialog

I used to save images as usual image file formats (jpg, png) by pressing Ctrl+S or Ctrl+Shift+S (Save or Save As dialog). Now in version 2.8 GIMP doesn't allow it anymore: you can Save only as .xcf but to save as .jpg or .png you must Export. Is…
Nickolai Leschov
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Is there a way to batch export SVGs to PNGs?

I have these SVGS and I'd like to export them to PNG images, I could export them with Inkscape but that would mean open each file and export that file to PNG which is not efficient (I have hundreds of them). How can I do this?
Uri Herrera
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How can I convert a .png file to .icns

What is the correct way of converting one or more .png files to .icns files?. I've installed icnsutils but I'm having a hard time figuring out how to work with png2icns.
Uri Herrera
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How to get pngcrush to overwrite original files?

I've read through man pngcrush and it seems that there is no way to crush a PNG file and save it over the original. I want to compress several folders worth of PNGs so it would be useful to do it all with one command! Currently I am doing pngcrush…
DisgruntledGoat
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Image viewer that shows transparent as white or different color, not as checkered

I have made a number of graphical mockups in SVG, and then exported them to PNG. They all have transparent background, because that makes sense in my case. However, it isn't easy to browse through the PNG-files. Both Gwenview and Gnome Image Viewer…
Mads Skjern
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How do I find out if a PNG is PNG-8 or PNG-24?

I have a PNG file but I can't tell if it's PNG-8 or PNG-24?
Exil
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How to convert png to tiff?

i need to convert png files to tiff. Is there an easy way to do so in Ubuntu 14.04? Thanks!
giulio
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Tool to convert a sequence of numbered PNG files to an animated GIF?

I've created a series of small PNG files using Blender and I was wondering if there was a tool (preferably in the repos.) that would convert them to an animated GIF. One extra stipulation: the tool needs to also be able to set the background color…
Nathan Osman
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ImageMagick PNG delegate install problems

Ubuntu 14.04: I've downloaded the latest imagemagick source and installed, using option below to configure: root@usve59445:~/im/ImageMagick-6.9.3-7# ./configure --enable-shared --with-png=yes After installation however, I have zero items in my…
gvanto
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