I have jpg file which is cropped for sure from original file.
In osx system I can see small thumbnail preview with whole image.
My question is: is jpg format allow to store whole image, and coordinates that describe how it should be cropped when you open file in any program?
Or is this small thumbnail somehow saved in this file as second resource?
What software do I need to check this? What keywords should I look in order to understand that better?
Related
I am Working on a small Image comparing script where the reference images are generated as SVGs and the compare images are PNGs.
I can transform the SVG files to PNG (using svglib and renderpm) but can´t specify the size I want them to be generated as(renderscale seems to cut of a part of the picture), but I need to get them to the same size for the compare functions and resizing the pngs nullifyes the whole purpose of vector graphics in itself. Any Ideas?
Regards a python noob
I have some data which I would like to show in a Plot. My Problem is, that while there seems to be a tone of libs for generating a website with all sorts of plots, I just want to generate an Image and save it as a file. My question would be if you guys know any options for doing so?
(I don't care if I would get an SVG or a .png)
This question is very similar to PDF image in PDF document using ReportLab (Python), but I seem unable to adapt it to my needs:
I want to add vectorized images (available in SVG oder PDF format) to an A4 PDF output. The images must not get scaled! They should simply be placed from top to bottom with some vertical spacing and automatic page breaks.
No text or other content is required. Basically, I'm looking for a pdfnup solution. In the past, I have used pdflatex with a simple input file for the task, but this is no option for the target system.
There's an svg image of Alabama's state flag # http://en.wikipedia.org/wiki/File:Flag_of_Alabama.svg
The caption says "This image rendered as PNG in other sizes." I downloaded the 1,000-pixel size #
http://upload.wikimedia.org/wikipedia/commons/thumb/5/5c/Flag_of_Alabama.svg/1000px-Flag_of_Alabama.svg.png but it won't display on my web page. I opened it in Photoshop, copied it into a new window and saved it with a new file name, but it still doesn't display.
So I guess I was wrong when I thought "rendered as a PNG" means an image is a png. It's actually a SVG...with a .png extension?
Anyway, I just wondered what's going on here and what I need to do to download such images as pngs. Or is the only solution to take a screenshot?
The PNG file you linked to (the ".png" link) is not an SVG. It is definitely a PNG.
I don't know why it isn't displaying for you, but it has nothing to do with SVG.
To get the image as .svg just copy the source of the page (of the image) to an editor. Now save it as an .svg image
I downloaded the icon file from http://www.freeiconsweb.com/favicon.ico. I try to convert ico file to png as below : -
im.convert(['favicon.ico', '-format', '16x16+0+0', 'favicon.png'], function (err, stdout, stderr) {
});
Result :
It's create two png file for me. favicon-0.png and favicon-1.png.
Correct result:
It should be create one file only that is favicon.png.
Anyone know about the why imagemagick create two file ?
An ico file can contain multiple images, a png cannot, so ImageMagick makes a png for each image in the ico file.
From the Wikipedia page (emphasis mine):
The ICO file format is an image file format for computer icons in Microsoft Windows. ICO files contain one or more small images at multiple sizes and color depths, such that they may be scaled appropriately.
To get only a single image, you'd have to specify which one you want. For help with that, see the (command line) documentation on reading particular frames of an image.