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

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0answers
15 views

some problems about libpng, I can't open software-center and qtcreator

if i open software-center, it will closed by itself.in terminal, >software-center /usr/bin/python: relocation error: /usr/lib/x86_64-linux-gnu/gdk-pixbuf-2.0/2.10.0/loaders/libpixbufloader-png.so: ...
0
votes
1answer
24 views

Steganography/Execute command

I made a program that encrypts commands and executes on the remote system, but after that I wanted to learn steganography and I have one question: Is it possible to attach a script to a PNG or JPG or ...
1
vote
1answer
50 views

How to change the dash icon in Unity 15.04 to a custom .png? [duplicate]

It's very tiring to have to keep looking at the default image of the Ubuntu logo in the dash. How do you change this default image into a custom image (btw, in my case I have a 48x48 .png ready to be ...
2
votes
2answers
121 views

How to convert png to tiff? [duplicate]

i need to convert png files to tiff. Is there an easy way to do so in Ubuntu 14.04? Thanks!
0
votes
1answer
32 views

Renaming png fails with shutter

I am learning to use shutter and from the CLI I was trying to take 10 screenshots at 1 second interval and to rename them, however when I try I get an error message that says: "There was an error ...
0
votes
0answers
162 views

Cannot run snes9x 1.53

I cannot run snes9x-gtk 1.53 which I downloaded from http://snes9x.ipherswipsite.com/. I keep getting this error message: ./snes9x-gtk: error while loading shared libraries: libpng14.so.14: cannot ...
1
vote
1answer
142 views

How can I create a GIF out of a sequence of PNG files without the previous image appearing on the next frame?

I'll let the .gif I have do most of the talk: The GIF A bit of backstory: I have 100 PNG files (which can be accessed from this link), each one is a frame of an animation. With those files, I have to ...
2
votes
2answers
95 views

Directory using more space than expected

I have a directory on Ubuntu that contains 262144 files. Each file is a 25x25 png image. On average these files are approximately 1.14kb and no file is larger than 2kb. Yet this directory is using ...
2
votes
2answers
1k views

How to invert colors in multiple images using Gimp in terminal?

I need to convert multiple .png images from black (and dark grey) to white (and light grey). I have found that I eed to use gimp plugin "plug-in-vinvert" but I can not figure out how to use it. I have ...
0
votes
0answers
419 views

how do i compile & install libpng from source without apt-get

I downloaded libpng source(tar.gz) from http://libpng.org/pub/png/libpng.html. My system -> Linux mpp-qa2-5803 3.13.0-24-generic #47-Ubuntu SMP Fri May 2 23:30:00 UTC 2014 x86_64 x86_64 x86_64 ...
2
votes
3answers
604 views

Writing a bash script to create PNGs out of SVG with Inkscape from a directory

I'm very new to bash scripting and I hope that someone can help me with that task. I have a directory filled with *.SVG-files and I want to batch convert them with inkscape to PNG with the following ...
2
votes
1answer
107 views

Inkscape File recovery

I was working on Inkscape software and saved my file as .png, after that my laptop suddenly stopped working. I restarted the system (hoping there will be a recovery file as inkscape .svg) but there ...
0
votes
1answer
117 views

.png Images will not display on webpage

I am having an issue where my '.png' images will not display in my webpage. I am running 12.04 server. The images are linked and called right in the code. The server recognizes that the files are ...
2
votes
2answers
8k views

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 ...
1
vote
1answer
785 views

14.04 MIME type “png”

Error message clicking on nnn.png images (and no image display): No default application found for the MIME type image/x-apple-ios-png. Open the "File types and programs" page in the Control Center to ...
5
votes
1answer
3k views

How do I convert a PNG to SVG, using a software?

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 ...
1
vote
1answer
10k views

how to convert an xcf file[image] to jpg or png

i have gimp photo editor which automatically saves the converted files in xcf format but they cannot be reopened with any other app and thats the reason for this question please help me
5
votes
2answers
10k views

Converting a lot of image jpg to png

I want to convert a lot of image(nearly 100) from jpg to png format. How can I do this without renaming them?
2
votes
1answer
313 views

Eclipse displays png as a text file

I want to create an app in eclipse with libGDX. But when I import a png file into Eclipse it displays it as a text file. I tried with the Android Developmet Kit from Google, but the same problem as ...
-1
votes
2answers
566 views

eog does not recognize .png file format and many icons are gone

I use Ubuntu 12.04 and XFCE desktop on a PC with nVidia graphics card. I ran into Segmentation fault during a Ubuntu update process. An very inconvenient consequence is that .png files cannot be ...
1
vote
1answer
37 views

what is “make png” command for?

I have a source code that should be compiled to create some executable files. The code is: #------------------------- # for executable file #------------------------- executables : chmod 754 ...
0
votes
3answers
2k views

png terminal in gnuplot

I have : Ubuntu 13.10 64 bit wxMaxima 13.04.2 ( Maximy:5.31.3 ) Lisp:SBCL 1.1.1.0.debian gnuplot version 4.6 patchlevel 4 last modified 2013-10-06 When I check terminals in gnuplot using : ...
1
vote
2answers
513 views

ffmpeg how to output images from a video

I want to extract images from a video I want thous images to be extracted from specific time for example 0:30 1:15 1:45 and I would love them to be in PNG format as well Thank you in advanced ...
22
votes
3answers
74k views

How to create a png with transparent background in inkscape?

Is it possible? A PNG is generally less in size than an SVG. Sometimes I need small sized images in sites like Launchpad.
7
votes
4answers
11k views

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 ...
4
votes
1answer
236 views

Screenshot tool with integrated optipng or pngcrush

This is a followup question of how do I get maximal compressed screenshots? Is there a screenshot tool that has optipng or pngcrush already included to minimize the filesizes of the png ...
3
votes
2answers
901 views

Avoid “save for web” in Gimp

Previously Gimp could directly open and save JPEG and PNG-images. Since Ubuntu 12.10 Gimp is upgraded and requires me to save via a "save for web"-dialog. I have several issues with this dialog and ...
1
vote
1answer
479 views

Can I use PNG instead of SVG for icons? [closed]

I'm making a theme. I'm new to the whole linux/ ubuntu thing. I have a lot of experience using photoshop/ gimp so drawing up some icons in those programs is a piece of cake to me. I was messing around ...
1
vote
2answers
630 views

blurry images with mogrify & convert

Does anyone know why this image is so blurry? I did a convert from pdf to png and it turned out like that. Before deleting imagemagick and it's entire toolset from software-center most of my image ...
4
votes
1answer
4k views

convert several png to one pdf

I have 280 pgn files that I want to merge and convert into one pdf. PNG files names are in the sequence p000.png, p001.png etc and total space is about 30mb. I did: convert p00*.png to myfile.pdf ...
2
votes
2answers
379 views

How to convert multiple files to png (instead of one) in Thunar custom actions?

I have added convert %f %f.png to Thunar's custom actions to convert a selected image to png. What would be the command that can be added in the same way that would allow selecting multiple files or ...
8
votes
1answer
4k views

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.
6
votes
2answers
3k views

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 ...
1
vote
1answer
653 views

Images not working with Glade?

I am sorry if it appears that I am spamming, I am just trying to learn as much about Ubuntu development as possible. I have this basic Quickly app set up and working fine. I have one image on the ...
2
votes
2answers
4k views

Cannot open PNG files with imageviewer [closed]

When I try to open PNG files, I double click them, then nothing happens. I have to go to "Open with" and select F-spot photoviewer to view PNG files. This is eog, eye of gnome, correct? How can I ...
6
votes
1answer
4k views

Gimp colours do not fill correctly

This is probably a very easy question, but I am stumped. I am trying to edit a png. I select a colour with the "Select by color" tool, change the fill colour to red ff0000, or 255,0,0, but when I ...
2
votes
1answer
77 views

Lookit does not produce a PNG file that is able to be used by all image viewing applications

Recently I have begun experimenting with Lookit, a screen capture upload application. At this point I have not tried the upload capabilities. That is, my various screen captures are simply being ...
13
votes
2answers
9k views

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 ...
1
vote
0answers
166 views

Change default .png for saving .jpeg image [closed]

I once read about this possibility, including controlling the size of resolution, unfortunately, did not save the link and I'm trying without much success.
2
votes
2answers
20k views

What's the best way to install the GD graphics library for Nagios?

While trying to install Nagios 3.2.3, I ran their ./configure script and got these errors: checking for main in -liconv... no checking for gdImagePng in -lgd (order 1)... no checking for gdImagePng ...
12
votes
2answers
4k views

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 ...
2
votes
2answers
3k views

How to Save Filters with PNG in Inkscape

I have created a graphic with multiple layers in Inkscape. One of the layers is some text. I have applied a drop shadow filter to the text. When I save the file as PNG, the drop shadow is not saved. I ...