mask

问题 I'm trying to combine 2 mechanisms and I'm not getting very far on finding a solution. This is what I want to be able to do :- I have a routine that allows me to draw a mask on a UIImage layer which has a 2nd UIImage below which contains the image I am drawing the mask on top of. This seems to work fine and when I'm fininihed I just combine to 2 layers which then apply the mask and the image looks 'cut-out'. The problem is I want to be able to zoom, pan the mask and the image to be able to

问题 In ActionScript 3 we can apply a mask of to a visual object like this: SomeVisualObject.mask = maskShapeObject; How can I achieve similar result in Objective-C ? Assume I have two UIImageView objects, I want something like this: imageView1.mask = imageView2; How can I use one UIImageView to mask, or clip the shape of, another? 回答1: CALayer *maskLayer = [CALayer layer]; UIImage *maskImage = [UIImage imageNamed:@"maskImage.png"]; maskLayer.contents = (id)maskImage.CGImage; maskLayer.bounds =

问题 I'm trying to reproduce example of Szenia Zadvornykh presented here https://medium.com/@Zadvorsky/webgl-masking-composition-75b82dd4cdfd His demo is based on three.js r80, so I referenced r101 and tried to remove most of unrelated parts, and just have scene with grid and png mask on top. Here's my code: http://jsfiddle.net/mmalex/y2kt3Lrf/ Having commented // composer.addPass(maskPass) the grid shows up. But it does not seem like uniform sampler2D tDiffuse has the output of render pass. I

问题 I'm writing because I've some problems finding a correct SubnetMask of my own PC. I've already read the question How to get subnet mask of local system using java? but if I try: InetAddress thiscomputer = InetAddress.getLocalHost(); NetworkInterface thisNetworkInterface = NetworkInterface.getByInetAddress(thiscomputer); int thiscomputerSubnetMask = thisNetworkInterface.getInterfaceAddresses().get(0).getNetworkPrefixLength(); System.out.println("This pc subnetmask: "+thiscomputerSubnetMask);

问题 I have a field in a table that can be informed with differente values. Examples: Row 1 - (2012,2013) Row 2 - 8871 Row 3 - 01/04/2012 Row 4 - 'NULL' I have to identify the rows that have a string with a date mask 'dd/mm/yyyy' informed. Like Row 3, so I may add a TO_DATE function to it. Any idea on how can I search a mask within the field? Thanks a lot 回答1: Sounds like a data model problem (storing a date in a string). But, since it happens and we sometimes can't control or change things, I

问题 I want to change 2 letters and mask the remaining letters. I changed the letters but didn't mask other letter. This change command is SELECT NAME, CONCAT(SUBSTRING(NAME, 1, 2), SUBSTRING(NAME, 4, 1), SUBSTRING(NAME, 3, 1), SUBSTRING(NAME, 5, ABS(LEN(NAME) -4))) AS CHANGELETTER FROM TESTBILGILER How can I do masking SQL SERVER 2014? 回答1: A little ugly, but here is another option Example Declare @YourTable table(SomeCol varchar(50)) Insert Into @YourTable values ('Chirstina') ,('John') ,('Susan

问题 What I'm trying to do is add a textured frame or border to an SVG mask. Here is a working demo of what I'd like to achieve. Here is what I'm working with. Notice that in the second demo the image used in the mask, #frame , does not seem to have any transparency whatsoever and the color is inverted (so that what is actually black displays as pure white), unlike the mask image, #rectangle > image , in the working demo. However, the only difference that I can spot between both demos is that the

问题 Probably a commonplace question, but how can I parallelize this loop in Python? for i in range(0,Nx.shape[2]): for j in range(0,Nx.shape[2]): NI=Nx[:,:,i]; NJ=Nx[:,:,j] Ku[i,j] = (NI[mask!=True]*NJ[mask!=True]).sum() So my question: what's the easiest way to parallelize this code? ---------- EDIT LATER------------------ An example of data import random import numpy as np import numpy.ma as ma from numpy import unravel_index #my input Nx = np.random.rand(5,5,5) #mask creation mask_positions =

问题 I have some traffic camera images, and I want to extract only the pixels on the road. I have used remote sensing software before where one could specify an operation like img1 * img2 = img3 where img1 is the original image and img2 is a straight black-and-white mask. Essentially, the white parts of the image would evaluate to img1 * 1 = img3 and the black parts would evaluate to img1 * 0 = img3 And so one could take a slice of the image and let all of the non-important areas go to black. Is

问题 I've googled a lot and I've just given up, so I'll turn to the experts out there to see if someone can help me in my quest. I've got a logo converted to .SVG through illustrator. My objective is to use that logo to clip (or mask if you prefer) an entire div so that just a small part of it shows through and you can see the background. I decided to go the .SVG way since I want to create this website as a full scalable experience, and thus a .png would not work accurately from full HD