The second argument of the function is the quality. It ranges from 0.0 to 1.0 canvas.toDataURL(type,quality); Here you have extended information And I don’t think it’s possible to know the quality of the image once is converted. As you can see on this feedle the only information you get when printing the value on the … Read more
Nowadays this is pretty simple. The basic idea is: SVG to canvas canvas to dataUrl trigger download from dataUrl it actually works outside of the Stack Overflow snippet var btn = document.querySelector(‘button’); var svg = document.querySelector(‘svg’); var canvas = document.querySelector(‘canvas’); function triggerDownload (imgURI) { var evt = new MouseEvent(‘click’, { view: window, bubbles: false, cancelable: … Read more
The answer’s right on that web page: When you upload a PNG (Portable Network Graphics) file, similar colours in your image are combined. This technique is called “quantisation”. Because the number of colours is reduced, 24-bit PNG files can be converted to much smaller 8-bit indexed colour images. All unnecessary metadata is stripped too. The … Read more
I think you are at, or beyond, the limits of the ImageMagick documentation and would like to suggest you work out your answer empirically – or if you do get a definitive answer, that you at least test it empirically. I don’t have access to your images, so I generated a reference image myself, as … Read more
from PIL import Image image = Image.new(‘RGB’, (n, m))
You can select the shapes within a slide (Word Art also) and right click on the selection and choose “Save As Picture”. It will save as a transparent PNG.
As of now (January 31st 2015) there is a way to do that without using canvas, with pure CSS, and with only 2 lines of code. The trick is using the css filter and -webkit-filter properties to draw two drop shadows with no blur, one for the positive axis and one for the negative, which … Read more
The problem is that eps does not support transparencies natively. There are few options: rasterize the image and embed in a eps file (like @Molly suggests) or exporting to pdf and converting with some external tool (like gs) (which usually relies as well on rasterization) ‘mimic’ transparency, giving a colour that looks like the transparent … Read more
The web server is probably serving the image using the image/x-png MIME type. Chrome does not recognise this as an image (as of August 2012 February 2013), hence offers the file as a download. image/x-png is a legacy MIME type from the days before it got its official name, image/png, in 1996. However, when Internet … Read more
PIL already has a function to do exactly that: from PIL import Image, ImageOps thumb = ImageOps.fit(image, size, Image.ANTIALIAS)