dimension

I have search for a while, and there is a function call get_image_dimensions(), however, as to my understanding, it works for the images which are downloaded or say local. So, any functions or solution like getimagesize in PHP, that we can just get the dimension of an image via URL, instead of path to local? Using the python image library (PIL) from PIL import Image im = Image.open("fileName.jpg") im.size If you have an url, open it via urlopen and pass the file object to Image.open import urllib2 as urllib fd = urllib.urlopen("http://a/b/c") im = Image.open(fd) im.size PHP can open a URL as

How to get an uploaded image's height and width before form submission , using jQuery or Javascript? <input type="file" /> I need to check whether the width and height of the image to be uploaded are equal to the selected width and height. I have found this link . But it's only working for FF and Chrome, not in IE7 and IE8. Can anyone show me any other way to get the dimensions so that it's working in all browsers? You can create an image object, After creating image object get the image from the image tag which is showing the image to be uploaded and then you can get the dimension of the

I have been reading about dp, px, ppi and dpi for awhile now, and I am lost. Why is it that a large phone like the Galaxy Note 3 (with a 5.7 inch display) can have the same dp as a Moto X (with only 4.7 inches )? My calculation for each returns a width=360dp and height=640dp . It seems like many higher density phones fall in this range. Is this true or am I misunderstanding dp ? I am using the following to calculate my values: How to determine the screen width in terms of dp or dip at runtime in Android? Onik Because it's not just a matter of screen size, it is also a matter of screen density.

When reading about star schema design I have seen that many people uses various names for different types of dimension tables. Please list the names and a small description of each type. If any list also an alias name. I have come across these types of dimension tables so far: Regular dimension Standard star dimension. Time Dimension A special case of the standard star dimension. Parent-child dimension Used to model hierarchical structures, fx BOM (bill of materials). Snowflake dimension Can also be used to model hierarchical structures. Degenerate dimensions When the dimension attribute is

Let's say I have two 4-dimensional vectors (i.e. a and b) as follows: a = {a1, a2, a3, a4} b= {b1, b2, b3, b4} How do I compute the Euclidean distance between these vectors? The euclidian distance calculus is independent of dimensions. In your case, the euclidian distance between a and b can be written as: d(a,b) = sqrt(sum_{i=1}^{4} (a[i] - b[i])^2). Or, more specifically: d(a,b) = sqrt( (a1-b1)^2 + (a2-b2)^2 + (a3-b3)^2 + (a4-b4)^2 ). public static float ndistance(float[] a, float[] b) { float total = 0, diff; for (int i = 0; i < a.length; i++) { diff = b[i] - a[i]; total += diff * diff; }