FIXED! I’ve been wrestling with the same issue, and just had a breakthrough! We’ve established that if you give the image a background color or image, the png displays properly on top of it. The black border is gone, but now you’ve got an opaque background, and that pretty much defeats the purpose. Then I … Read more
Instead of -background transparent, use -background none. convert -background none in.svg out.png NOTE: The order of the arguments is important.
According to the doc, scipy.misc.imread is deprecated starting SciPy 1.0.0, and will be removed in 1.2.0. Consider using imageio.imread instead. Example: import imageio im = imageio.imread(‘my_image.png’) print(im.shape) You can also use imageio to load from fancy sources: im = imageio.imread(‘http://upload.wikimedia.org/wikipedia/commons/d/de/Wikipedia_Logo_1.0.png’) Edit: To load all of the *.png files in a specific folder, you could use … Read more
JPEG: YES — use progressive scan. It makes files smaller (each pass gets its own Huffman table), and partial rendering looks quite good. GIF: NO — it’s unlikely to make the file smaller, partial rendering is poor, and it’s pointless for animGIFs. It’s best not to use GIF at all (yes, even for anims). PNG: … Read more
You can use one commandline with two commands (gs, convert) connected through a pipe, if the first command can write its output to stdout, and if the second one can read its input from stdin. Luckily, gs can write to stdout (… -o %stdout …). Luckily, convert can read from stdin (convert -background transparent – … Read more
try this: var canvas = document.getElementById(“alpha”); var dataURL = canvas.toDataURL(“image/png”); var newTab = window.open(‘about:blank’,’image from canvas’); newTab.document.write(“<img src=”https://stackoverflow.com/questions/11112321/” + dataURL + “” alt=”from canvas”/>”); This shows image from canvas on new page, but if you have open popup in new tab setting it shows about:blank in address bar. EDIT:- though window.open(“<img src=”https://stackoverflow.com/questions/11112321/”+ canvas.toDataURL(“image/png’) +”‘/>”) does … Read more
PNG’s are pixel perfect (non-lossy), and require very little extra CPU energy to display. However, large PNGs may take longer to read from storage than more compressed image formats, and thus be slower to display. JPG’s are smaller to store, but lossy (amount depends on compression level), and to display them requires a much more … Read more
The file is actually a PNG with the wrong file extension. “0x89 0x50” is how a PNG file starts.
I am coming late to this party, but look what I have found at CodePen ! a[target=”_blank”]::after { content: url(data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAoAAAAKCAYAAACNMs+9AAAAQElEQVR42qXKwQkAIAxDUUdxtO6/RBQkQZvSi8I/pL4BoGw/XPkh4XigPmsUgh0626AjRsgxHTkUThsG2T/sIlzdTsp52kSS1wAAAABJRU5ErkJggg==); margin: 0 3px 0 5px; } <a class=”external” href=”https://example.org” target=”_blank”>external link</a>
By the looks of it you need to actually pass drawImage an image object like so var canvas = document.getElementById(“c”); var ctx = canvas.getContext(“2d”); var image = new Image(); image.onload = function() { ctx.drawImage(image, 0, 0); }; image.src = “data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAUAAAAFCAIAAAACDbGyAAAAAXNSR0IArs4c6QAAAAlwSFlzAAALEwAACxMBAJqcGAAAAAd0SU1FB9oMCRUiMrIBQVkAAAAZdEVYdENvbW1lbnQAQ3JlYXRlZCB3aXRoIEdJTVBXgQ4XAAAADElEQVQI12NgoC4AAABQAAEiE+h1AAAAAElFTkSuQmCC”; <canvas id=”c”></canvas> I’ve tried it in chrome and it works fine.