mask

问题 I'm trying to render some UIImages into 1 single image that I can save in my photo album. But it seems to as if the layer.renderInContext doesn't take a layermask into account? Current behavior: the photo saves, and I see mosaicLayer, without the masking effect of maskLayer. Expected behavior: the photo saves and I see the image in my view, with on top of that a masked mosaicLayer. I use the following code to mask the image UIImage *maskImg = [UIImage imageWithContentsOfFile:[[NSBundle

问题 Something like SELECT COUNT(*) AS c FROM BANS WHERE typeid=6 AND (SELECT ipaddr,cidr FROM BANS) MATCH AGAINST 'this_ip'; So you don't first fetch all records from DB and then match them one-by one. If c > 0 then were matched. BANS table: id int auto incr PK typeid TINYINT (1=hostname, 4=ipv4, 6=ipv6) ipaddr BINARY(128) cidr INT host VARCHAR(255) DB: MySQL 5 IP and IPv type (4 or 6) is known when querying. IP is for example ::1 in binary format BANNED IP is for example ::1/64 回答1: Remember

问题 I have a binary mask that I want to be permanently applied to a colour image how would I do this? The binary mask should be preferably permanent- as in I don't want to reapply the mask to the image every time I call a function. Basic Code Examples would be appreciated. If you use code, please explain the code instead of just posting it. Thank You 回答1: You don't apply a binary mask to an image. You (optionally) use a binary mask in a processing function call to tell the function which pixels

问题 I am using a jqgrid where I'd like to use inline editing and mask the entry such that the user is prompted to enter hh:mm where hh = hours and mm = minutes. I'm using the digitalBush masked jquery plugin. The issue is that when I call it from initData, it overwrites the current data in that field. I noticed that this behavior is different when you use a modal form to do the editing. Does anyone have a solution for this issue? I'll call the mask from any event, and I'm happy to use any

问题 I have a boolean mask array a of length n : a = np.array([True, True, True, False, False]) I have a 2d array with n columns: b = np.array([[1,2,3,4,5], [1,2,3,4,5]]) I want a new array which contains only the "True"-values, for example c = ([[1,2,3], [1,2,3]]) c = a * b does not work because it contains also "0" for the false columns what I don't want c = np.delete(b, a, 1) does not work Any suggestions? 回答1: You probably want something like this: >>> a = np.array([True, True, True, False,

问题 I've seen similar questions, but haven't found workable answers. I want to mask a UIView using a grey image (need to convert to alpha scale for masking). The UIView has background. It should be easy to mask an image, but I want to mask any UIView. Any clues will be appreciated. 回答1: I've been working on this problem for a couple of hours and have a solution that I think will do what you want. First, create your masking image using whatever means you see fit. Note that we only need the alpha

问题 I have a simple scene with some elements added to it. Now i want focus on a specific element with a mask a cut a whole at the same position as the element I want to focus on. Very similar to what we can see on some games when they are started first time showing some kind of tutorial. Basically I am adding a fullscreen layer with alpha=0.7 (so user still see all the content) but then add a circle at a specific position as this layers child and set blendMode= . Subtract so it "cuts" out a

问题 I'm using the jquery iMask plugin found here. Here is my code: fiddle When I run it 1) it doesn't work correctly. The input for phone is not masked like i set it up 2) the console displays the error: Uncaught ReferenceError: Json is not defined fiddle.jshell.net:1 What is this error and how do I fix it? Thanks 回答1: It's not a jQuery plugin, it's a mootools plugin. Use the jQuery port instead https://github.com/cwolves/jQuery-iMask http://jsfiddle.net/GtQKh/9/ $(document).ready(function(e) { $

问题 I have a masked image that's utilized by a UIBezierPath() and I'd like to have a border around the masked portion rather than the original image. I've come this close in my (countless number) attempt through trial and error and, tirelessly, given up. Any easier way to do this? This is how far I've come to my goal: I'd love to have the border go inward! :-( Swift 2 Code: let picture = UIImageView(image: UIImage(named: "myPicture.png")) picture.layer.contentMode = .ScaleAspectFit picture.layer

问题 Below is the code I have written to convolve an image with a x-direction Sobel mask. The function inputs a gray-scale image along with a kernel to be convolved with. However, the result I am getting is different compared to the result I get from the built-in conv2() function. Why is that? What am I doing wrong? Here's my function's output: Here's conv2() output: 回答1: You are computing the correlation. The 2D convolution is a 180 degree rotation (flip both axes) of the kernel. h = rot90(h,2);