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

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0
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1answer
21 views

Text scaling / clipboard issue

I am having some difficulty understanding some issues with dia, perhaps better posted as two questions, however I do get the impression that they are related in gnome somehow; they are as follows: ...
0
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1answer
39 views

Can't install libpng-dev

I use Ubuntu 15.10 64-bit. When I run sudo apt-get install libpng-dev the console prints Reading package lists... Done Building dependency tree Reading state information... Done Note, ...
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0answers
30 views

create a video file from series of png images

I know there a lot of similar questions, but for some reason even after reading them it does not work. I would like to create a video from a series of png-files. The files are named like ...
0
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0answers
18 views

How to set default file type PNG for Simple Scan?

With Xubuntu 15.10, Simple Scan 3.18.1, the default file type is, even for images, PDF. I would like to set it to PNG, is that possible? There is a related, older question for changing from JPG to ...
0
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2answers
56 views

how to convert .svg image to .png? [duplicate]

I would like to change the color of some SVG pictures and then save them as PNG images. I have installed GIMP. I am running Ubuntu 14.04. How can I do that?
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0answers
36 views

JPG displays colors less bright than PNG in Image Viewer

When I save an image in Gimp to JPG and PNG, then open it in Image Viewer, the JPG version seems less bright. The PNG is like when opened in Gimp. When opening both images in Gimp or in Photoshop on ...
0
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0answers
15 views

how to make a movie with some png files in ubuntu . also how to set the pause time?

how to make a movie with some PNG files in Ubuntu . also how to set the pause time ? it should be in a format that is playable in Vlc player.
2
votes
1answer
34 views

How can I get Eye of Gnome to open each figure in a new window?

I frequently open several (~10) figures that I want to compare. I have always generated them using an eps format then used evince to open the set I want to compare using something like evince ...
2
votes
1answer
124 views

Convert png to pdf without using convert

I'm trying to convert, from the command line, .png files of screenshots created by scrot to pdf files. I can successfully do this within shotwell, but I'd like to do it from the command line. ...
0
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0answers
8 views

How to turn an animated GIF into seperate still PNG files [duplicate]

Is there any way in Ubuntu GNOME 15.04 to convert an animated GIF file into separate PNG still images? So that each frame becomes a separate PNG image file.
0
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1answer
36 views

PNG images are viewed by Firefox

General problem start with seting default application for viewing png files as a Shotwell. If your default image viewer is Shotwell Viewer, your PNG files will be opened with Mozilla Firefox. Why is ...
1
vote
1answer
28 views

Need help recovering file from WasteBin [duplicate]

I am a graphics artist and I've lost around 500 pictures that I created by carelessly deleting it in the wastebin... I really need these back as they are for YouTubers and such ;( Please help if you ...
0
votes
1answer
104 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
340 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 ...
3
votes
2answers
1k 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
52 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 ...
1
vote
1answer
240 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
113 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 ...
3
votes
2answers
3k 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 ...
2
votes
3answers
877 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
203 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
170 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 ...
8
votes
2answers
25k 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
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1answer
1k 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 ...
7
votes
2answers
4k 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 ...
7
votes
2answers
19k 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
565 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 ...
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3answers
748 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
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1answer
39 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
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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
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2answers
845 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 ...
26
votes
3answers
91k 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
17k 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
292 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
1k 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
612 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
764 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
5k 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
432 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 ...
9
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
3answers
4k 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
813 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
5k 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 ...
2
votes
1answer
78 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 ...
14
votes
2answers
10k 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 ...
2
votes
2answers
21k 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 ...
13
votes
2answers
5k 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
4k 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 ...