UIButton: set image for selected-highlighted state
I found the solution: need to add addition line [button setImage:[UIImage imageNamed:@”pressed.png”] forState:UIControlStateSelected | UIControlStateHighlighted];
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Can I store images in MySQL [duplicate]
Yes, you can store images in the database, but it’s not advisable in my opinion, and it’s not general practice. A general practice is to store images in directories on the file system and store references to the images in the database. e.g. path to the image,the image name, etc.. Or alternatively, you may even … Read more
Algorithm to compare two images
These are simply ideas I’ve had thinking about the problem, never tried it but I like thinking about problems like this! Before you begin Consider normalising the pictures, if one is a higher resolution than the other, consider the option that one of them is a compressed version of the other, therefore scaling the resolution … Read more
In Python, how do I read the exif data for an image?
You can use the _getexif() protected method of a PIL Image. import PIL.Image img = PIL.Image.open(‘img.jpg’) exif_data = img._getexif() This should give you a dictionary indexed by EXIF numeric tags. If you want the dictionary indexed by the actual EXIF tag name strings, try something like: import PIL.ExifTags exif = { PIL.ExifTags.TAGS[k]: v for k, … Read more
execute function after complete page load [duplicate]
this may work for you : document.addEventListener(‘DOMContentLoaded’, function() { // your code here }, false); or if your comfort with jquery, $(document).ready(function(){ // your code }); $(document).ready() fires on DOMContentLoaded, but this event is not being fired consistently among browsers. This is why jQuery will most probably implement some heavy workarounds to support all the … Read more
My images are blurry! Why isn’t WPF’s SnapsToDevicePixels working?
You may want to consider trying a new property available now in WPF4. Leave the RenderOptions.BitmapScalingMode to HighQuality or just don’t declare it. NearestNeighbor worked for me except it led to jaggy bitmaps when zooming in on the application. It also didn’t seem to fix any glitches where icons were sizing in weird ways. On … Read more
CSS transition effect makes image blurry / moves image 1px, in Chrome?
2020 update If you have issues with blurry images, be sure to check answers from below as well, especially the image-rendering CSS property. For best practice accessibility and SEO wise you could replace the background image with an <img> tag using object-fit CSS property. Original answer Try this in your CSS: .your-class-name { /* … … Read more
Why do I get this particular color pattern when using rand()?
I was initially going to have the same answer as everyone else had and chalk this up to the issues with rand(). However, I thought better of doing so and instead analyzed the distribution your math is actually producing. TL;DR: The pattern you see has nothing to do with the underlying random number generator and … Read more
Convert string in base64 to image and save on filesystem
Starting with img_data = 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Decoded the data using the base64 codec, and then write it to the filesystem. # In Python 2.7 fh = open(“imageToSave.png”, “wb”) fh.write(img_data.decode(‘base64’)) fh.close() # or, more concisely using with statement with open(“imageToSave.png”, “wb”) as fh: fh.write(img_data.decode(‘base64’)) Modernizing this example to Python 3, which removed arbitrary codec support from string/bytes … Read more
Tooltip on image
You can use the standard HTML title attribute of image for this: <img src=”https://stackoverflow.com/questions/11716916/source of image” alt=”alternative text” title=”this will be displayed as a tooltip”/>