matplotlib: how to draw a rectangle on image

You can add a Rectangle patch to the matplotlib Axes. For example (using the image from the tutorial here): import matplotlib.pyplot as plt import matplotlib.patches as patches from PIL import Image im = Image.open(‘stinkbug.png’) # Create figure and axes fig, ax = plt.subplots() # Display the image ax.imshow(im) # Create a Rectangle patch rect = … Read more

Check if an image is loaded (no errors) with jQuery

Check the complete and naturalWidth properties, in that order. https://stereochro.me/ideas/detecting-broken-images-js function IsImageOk(img) { // During the onload event, IE correctly identifies any images that // weren’t downloaded as not complete. Others should too. Gecko-based // browsers act like NS4 in that they report this incorrectly. if (!img.complete) { return false; } // However, they do … Read more

Render HTML to an image

There is a lot of options and they all have their pro and cons. Option 1: Use an API ApiFlash (based on chrome) EvoPDF (has an option for html) Grabzit HTML/CSS to Image API … Pros Execute Javascript Near perfect rendering Fast when caching options are correctly used Scale is handled by the APIs Precise … Read more

Drop shadow for PNG image in CSS

Yes, it is possible using filter: dropShadow(x y blur? spread? color?), either in CSS or inline: img { width: 150px; -webkit-filter: drop-shadow(5px 5px 5px #222); filter: drop-shadow(5px 5px 5px #222); } <img src=”https://cdn.freebiesupply.com/logos/large/2x/stackoverflow-com-logo-png-transparent.png”> <img src=”https://cdn.freebiesupply.com/logos/large/2x/stackoverflow-com-logo-png-transparent.png” style=”-webkit-filter: drop-shadow(5px 5px 5px #222); filter: drop-shadow(5px 5px 5px #222);”>

How to hide image broken Icon using only CSS/HTML?

There is no way for CSS/HTML to know if the image is broken link, so you are going to have to use JavaScript no matter what But here is a minimal method for either hiding the image, or replacing the source with a backup. <img src=”https://stackoverflow.com/questions/22051573/Error.src” onerror=”this.style.display=’none'”/> or <img src=”https://stackoverflow.com/questions/22051573/Error.src” onerror=”this.src=”fallback-img.jpg””/> Update You can apply … Read more

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