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

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3answers
599 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 ...
2
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1answer
339 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
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2answers
601 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 ...
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1answer
2k views

multiple png images over a single pipe to ffmpeg (no file writes to disk!)

I have a program that generates a script for gnuplot, which in turn generates a lot of png images and send it to stdout. I want to pipe these images to ffmpeg without writing them to the disk. This is ...
2
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1answer
818 views

Keep alpha transparency in indexed PNG from Fireworks when batch resizing using convert (ImageMagick)

I have a special case where I'm using alpha transparency in indexed PNGs from Fireworks to keep the file size of PNG's in an iOS game down. (That is, indexed colors like an 8bit PNG but alpha ...
2
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0answers
67 views

Why have multiple PNG files been transformed to glitches on the external hard drive?

Pictures have been made and edited using Adobe Photoshop and saved as PNG on a MacBook If the hard drive of the PC is almost full the edited pictures will be copied to an external hard drive in order ...
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0answers
1k views

What is @OpenWithToastLogo.png?

Background Recently, I copy-n-pasted some text from Notepad into a command line window. The copied text included a TAB character prefixing the text I copied, for example "{tab}test.exe". When I ...
2
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1answer
390 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 ...
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4answers
612 views

How do I explain to my mother how to convert a bunch of PNG files into JPEGs?

Mom asked me to scan in a bunch of photos for her previously, and I scanned them in as PNG files; namely because most any software package can read them, and they don't throw away any of the photo's ...
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2answers
2k views

PNG file size is too big after converting from JPG

I try to convert a JPG file to PNG, but the size is still too big, about 7 MB. What's wrong? I used Microsoft Paint to convert it. The original file is only 500 KB in JPEG, yet the PNG file is 7 MB. ...
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2answers
619 views

How does this animated png work?

I've just received an email that contains a remotely hosted animated png. The png file is a countdown timer. Here is the URL:- https://img.kickdyn.com/57/1MfiOGVFjvmaMMHd3VZv/imgancnt.png Can ...
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2answers
86 views

Batch Convert BMP to PNG & keep original created/modified dates

I have many screenshots from video games over the years that I want to convert while maintaining their timestamps so I can keep them chronologically organized with other images. I've already used an ...
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1answer
702 views

Make the extension .fw.png open in a different program to .png?

I want files ending in .fw.png to open in Adobe Fireworks but I want regular .png files to open in my standard image viewer program. Is this possible?
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2answers
11k views

How can i make a font using a .png image

I am using Font Lab Studio 5. but i dont know how to import vector file
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4answers
5k views

Best way to export powerpoint slides into pngs with different resoltuions?

I am trying to convert powerpoint slides into a png. I know that there are several ways that allow to do this by allowing for changing the resolution (e.g., within powerpoint by changing the registry, ...
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2answers
616 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 ...
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4answers
3k 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 ...
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2answers
2k views

lossless PNG to video in Imagemagick

As an intermediate step in creating an animation, I need to put a bunch of sequential PNGs into a movie file. I tried ffmpeg but was getting compression and artifacting even when I set quality to ...
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1answer
383 views

Force the .png extension on Mac Screenshots

It's very easy to take a screenshot on the Mac with either Command-Shift-3 or Command-Shift-4, and they will be dumped on your desktop. One major annoyance, however, is that the files created have no ...
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2answers
31 views

Batch extract thumbnails with ffmpeg

I need to batch extract thumbnail pic from hundreds of .mpg files using the following bat code, which works like a charm, but the only drawback is that the output png are with file name like "filename....
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2answers
6k views

Mac get info always showing png icon instead of the icon

When I open 'Get Info' copy my icon over the default and it applies it but it never shows it. It only shows the default PNG icon (with the pictures and the camera). Does anybody faced the problem ...
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1answer
1k views

How to convert a photo without losing quality?

I have to convert a bmp into another standard format, without losing quality. To which format shall I convert it to?
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2answers
155 views

Software for lowering the colors in PNG-24 files

I am searching for a software that will allow me to reduce the number of colors for PNG-24 transparent (as in photoshop) files. Photoshop doesn't allow me any control over the amount of colors the PNG ...
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4answers
618 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.
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3answers
5k views

Creating blurred PNG image to lay over text link

I have a website where I want the text links in the navigation to be blurred. When the visitor then hover over the text link it becomes clear again. My idea is to make some kind of blurred image in ...
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2answers
3k views

rescale PDF files

I have a bunch of PDF files that I have been using to make PNG files, with a width of 320 pixels. The way I have been doing this is by creating the PDFs in LaTex with a width of 4.44444 inches, then ...
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2answers
2k views

Photoshop - How to create a completely non anti-aliased image

How to create a completely non anti-aliased image... see the white dots on the body outline... by the way this thing is transparent and is being displayed on desktop via an application... anyways......
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3answers
10k views

how to change the png file background to transparent

I used Paintbrush drawing an icon, if it is on a colored background, it will display a white block shown as below. I prefer to change the icon background from white color to transparent color: ...
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1answer
583 views

How to change the default editor for PNG files from MS Paint to paint.net in Windows 10?

I have paint.net installed in my Windows 10 Pro. When I right-click a PNG file in the Windows Explorer, I see the Edit command. However, it opens the Windows Paint app, and I'd like to change it to ...
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1answer
351 views

Create empty truecolor PNG with ImageMagick

How can I create an empty (transparent) PNG containing 24 bit color channels with ImageMagick? The obvious one convert -size 1920x1080 xc:transparent blank.png will create an 1bit b/w ...
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2answers
48 views

Comparing two images without fully downloading?

I want to download a copy of a big image file(+20MB) whenever it changes. But without downloading it every X seconds and comparing it with the old version i have, how would i know the image has ...
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2answers
273 views

Find out PNG transparent background color on Linux

It appears that PNG files contain background color information for transparent pixels. This sometimes becomes noticeable when using that image as a texture with wrong settings. How to find out in ...
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2answers
902 views

Export excel chart to png with certain dimensions

How do i export an Excel chart to a PNG image, defining the exact size of the resulting image file? I need to export some excel charts to PNG to put them on a html page. Due to design restrictions, ...
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1answer
372 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 ...
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2answers
4k 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.
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1answer
6k views

Why is R having trouble rendering plots to a PNG file?

I am trying to get R to do some very basic plotting and such in UNIX, but am getting a weirdo error relating to X11, when as far as I can tell I'm not even needing X11. I have a matrix name d and ...
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1answer
581 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?
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1answer
40 views

Github Gists - Download Gist as Image File for Code Report

I have some pretty huge SQL queries as github gists and I would like to download them as images (eg PNG) in order to put them in a Word report document. I cannot find a way to do that, they just ...
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1answer
202 views

Best way to convert BMP to PNG while maintaining quality?

Is this possible convert BMP to PNG while maintaining quality? I am trying to reduce the size of some albums that are in BMP, but still maintain the lossless quality. Just tried XnConvert and setting ...
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2answers
25 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 #...
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1answer
569 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 ...
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4answers
391 views

Convert single PNG image into single PDF

I need a method to convert single images (specifically PNG format) into PDF's that are automatically re-sized to fit that single image (and not remain the default 8.5x11" letter size). I could do this ...
1
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1answer
51 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 ...
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2answers
187 views

Reducing file size of Photoshop-exported PNG files

I can export a file from PSD (photoshop) to PNG (portable network graphics) format. With an image sized 1024x768 I usually get a PNG file that's approximately 120KB. However, if I open that exact ...
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1answer
38 views

Batch Inverting .PNG Images while maintaining transparency

I have a large number of monochrome PNGs that are black on transparent. I would like to invert them to be white on transparent. I've tried using XnConvert but it doesn't maintain the transparency.
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2answers
762 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.
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1answer
46 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 ...
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0answers
79 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), ...
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0answers
301 views

Image optimization: Photoshop CS6 vs jpegtran / OptiPNG

Is there any difference in terms of algorithm for optimization between Photoshop's Shift+Alt+S (save for web) and jpegtran's -optimize and -progressive? It seems my images are not reduced (or reduced ...
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1answer
106 views

Most space-efficient format for image with large dimensions but few colors?

Recently I have had to scale up the dimensions of a gif image by a factor of 2, this resulted in an increase of the file size by about 8 times. While this is not a complete surprise, I can't help but ...