Questions tagged [png]

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

310 questions
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5 answers

Why does this PNG image display differently in Chrome & Firefox than in Safari and IE?

Check this image out: On Chrome and Firefox it will show as a pear. Now, try to save it and look at it saved on your desktop. Also, try viewing in Safari or Internet Explorer. It will display as an apple! Try clicking the image and moving it…
ethree
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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 macOS?
Lorin Hochstein
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239
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13 answers

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.
nedned
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12 answers

How do I convert an SVG to a PDF on Linux

How do I convert an SVG (containing 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, and it makes some lines shorter in the output PDF. So…
pts
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8 answers

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 between 0 and 9. If it has a compression parameter…
pkout
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10 answers

How to convert a PDF document to PNG?

Is there a free way to convert a PDF document to a PNG image?
Raymond
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10 answers

How do I convert a .PNG into a .ICO?

There's an image in the VS2010 stock icon pack which is only included as a PNG, which I would like to use as an ICO (I want XP and earlier users to see the icon). How can I convert the PNG into the ICO?
Billy ONeal
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7 answers

Convert many images to one PDF on Mac

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 I want. Thoughts?
tekknolagi
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75
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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 called pngmeta. But what other image software…
Johan
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50
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4 answers

Invisible PNG image layer that is only visible as a background

I have recently came across a very peculiar image, with strange properties. The image is in PNG format and just shows a simple bird with a transparent background. My friend sent me the image with simple instructions just to save it and set it as my…
Callum
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45
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3 answers

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 PNG format. I include an image using this in…
user46976
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43
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8 answers

JPEG vs PNG vs BMP vs GIF vs SVG

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.
Narek
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43
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4 answers

Photoshop How to save selection to PNG

I have a largish PSD file with a couple of hundred layers, that I would like to extract selected areas from into PNG files. Areas can consist of a couple of layers. Being new to Photoshop, I have been using the following workaround. Duplicate…
Aniti
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How to create an uncompressed AVI from a series of 1000's of PNG images using FFMPEG

How can I create an uncompressed AVI from a series of 1000's of PNG images using FFMPEG? I used this command to convert an input.avi file to a series of PNG frames: ffmpeg -y -i input.avi -an -vcodec png -s 1024x768 pic%d.png` Now I need to know…
user995074
36
votes
6 answers

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 image editing software (Irfanview, Photoshop) to…
galacticninja
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