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- Dictionarymask/mɑːsk/
noun
- 1. a covering for all or part of the face, worn as a disguise, or to amuse or frighten others. Similar
- 2. a covering worn over the mouth and nose in order to reduce the transmission of infectious agents, or to prevent the inhalation of pollutants and other harmful substances. Similar
verb
- 1. cover (the face) with a mask: "he had been masked, bound, and abducted"
- 2. conceal (something) from view: "the poplars masked a factory"
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May 8, 2012 · A mask defines which bits you want to keep, and which bits you want to clear. Masking is the act of applying a mask to a value. This is accomplished by doing: Below is an example of extracting a subset of the bits in the value: Applying the mask to the value means that we want to clear the first (higher) 4 bits, and keep the last (lower) 4 bits.
It is a known flaw in the C language that | and & have lower precedence than == (Dennis Ritchie admitted this at some point).
Sep 8, 2009 · int mask = -1; mask = mask << param; mask = ~mask; This way you can avoid lookup tables and hard coding the length of an integer. Explanation: A signed integer with a value of -1 is represented in binary as all ones. Shift left the given number of times to add that many 0's to the right side. This will result in a 'reverse mask' of sorts.
Aug 10, 2020 · I created a mask to replace detected outliers with NaN values in a specific column in a dataframe, and the code I wrote worked perfectly for the random dataframe I created, but the the same code di...
Aug 7, 2009 · Your variable, msginfo_mask, when represented as a binary number (1's and 0's) is used as a "mask" by setting certain bits to 1 (using bit-wise OR) or clearing certain bits to 0 (using bit-wise AND). Your code snippet sets certain bits to 1 while leaving others unchanged. Masking is comparable to how a painter masks off areas that they do not ...
The masked value should display directly inside of the input. Something like this: <input type='text' value='____/__/__'>. I wrote the mask as a value in that example, but my intent is to allow people to write a date without typing / or - to separate months, years and days. The user should be able to enter numbers into the displayed field ...
Jan 9, 2013 · 1. Just use 0x1FF << 6 (if you want 111111111 << 6) or 0x3FF. << 6 (if you want 2^10-1 << 6). That's considerably clearer than your binary. As Jerry Coffin points out, you can easily get 2^10 by using 1 << 10, but I'm not convinced that this is clearer than just using hexadecimal.
May 26, 2010 · I need a macro that allows me to set a field (defined by its bit-mask) of a register (defined by its address) to a given value. Here's what I came up with: #include <stdio.h>. #include <assert.h>. typedef unsigned int u32; /*. * Set a given field defined by a bit-mask MASK of a 32-bit register at address. * ADDR to a value VALUE.
May 27, 2020 · 2. To mask off the low offset bits, your computation for mask is OK, but the expression is not. It should be: byte = (byte & ~mask); or simply: byte &= ~mask; To compute a mask from an offset with (1 << offset) - 1, you should beware that offset must be less than the number of bits in the type of 1. 1 being an int, if means offset < 32, so you ...
Oct 28, 2015 · 2. You can generate the ellipse mask yourself rather than using the imellipse command. % Create a meshgrid the same size of the image in order to generate the mask. [x y] = meshgrid(1:size(img, 1), 1:size(img, 2)); % Create the eclipse mask using the general form of an eclipse. % This will be centered in the middle of the image.
