gradient

SVG - How to apply a gradient transform matrix to a linear gradient brush?

由 独自空忆成欢 提交于 2021-01-28 12:09:11
问题 I'm writing a SVG viewer application in c++ language. I actually face a transform issue in several SVG files that I cannot figure out. Considering the following SVG file: <?xml version="1.0" encoding="UTF-8" standalone="no"?> <!-- Created with Inkscape (http://www.inkscape.org/) --> <svg id="svg9686" xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" xmlns="http://www.w3.org/2000/svg" height="90mm" width="145mm" version="1.1" xmlns:cc="http://creativecommons.org/ns#" xmlns:xlink="http:/

Background from CSS not working in Base.html

由 喜你入骨 提交于 2021-01-28 12:02:08
问题 The following base.html code is not implementing the gradient background from the css file that is in the same folder. base.html: <!doctype html> <html lang="en"> <head> <link rel="stylesheet" text="text/css" href="templates/css/style.css"> </head> <body> <h1>hi</h1> </body> </html> style.css: body { background: linear-gradient(to bottom, #faaca8, #ddd6f3); background-repeat: no-repeat; background-size: cover; width: 100%; height: 100%; } 回答1: If this is not working, the problem is going to

log background gradient ggplot

由 微笑、不失礼 提交于 2021-01-28 05:51:18
问题 I need a ggplot2 graph with a specific background in the y direction. Y is also log2 scale going from .25 to 4, midpoint thus 1. Y extremes (.25 and 4) must be red while midpoint (1) must be green. Diagonal grading of background color of ggplot graph in R got me far and from that I have written this: ## create a diag gradient background ## create a df to supply the background to geom_tile yseq <- seq(-2,2, length=100) yseqlog2 <- 2^yseq df <- expand.grid(x=0:100, y=yseqlog2) # dataframe for

image gradient angle computation

由 孤街浪徒 提交于 2021-01-27 12:40:16
问题 I am actually following the instructions of a paper: The input is supposed to be a binary "edge" image. The output should be a new image, modified by the instructions in the paper. My understanding of the instructions is, that one takes the gradient image of the edge image and modifies it and creates a new image with the modified gradient. Therefore is there a possibility in MATLAB/OpenCV of creating the same image with a new gradient? Reference to the paper: Li, Hongyu, and Lei Chen.

PyTorch how to compute second order jacobian?

由 本小妞迷上赌 提交于 2021-01-27 11:50:45
问题 I have a neural network that's computing a vector quantity u . I'd like to compute first and second-order jacobian with respect to the input x , a single element. Would anybody know how to do that in PyTorch? Below, the code snippet from my project. import torch import torch.nn as nn class PINN(torch.nn.Module): def __init__(self, layers:list): super(PINN, self).__init__() self.linears = nn.ModuleList([]) for i, dim in enumerate(layers[:-2]): self.linears.append(nn.Linear(dim, layers[i+1]))

PyTorch how to compute second order jacobian?

由 懵懂的女人 提交于 2021-01-27 11:50:16
问题 I have a neural network that's computing a vector quantity u . I'd like to compute first and second-order jacobian with respect to the input x , a single element. Would anybody know how to do that in PyTorch? Below, the code snippet from my project. import torch import torch.nn as nn class PINN(torch.nn.Module): def __init__(self, layers:list): super(PINN, self).__init__() self.linears = nn.ModuleList([]) for i, dim in enumerate(layers[:-2]): self.linears.append(nn.Linear(dim, layers[i+1]))

Image gradient in the point

由 北城以北 提交于 2021-01-27 07:38:43
问题 I'm working with the image segmentation. I need to compute image gradient in the point, so I was trying to understand by myself (because I know how to calculate gradient when having an ordinary equation) but I failed. I was googling... and googling but to find wright answer I couldn't. Can anyone say or give some information how to compute image gradient in the point step by step? 回答1: The gradient at each pixel of an image I(x, y) is simply the 2D vector (dI/dx,dI/dy)(x, y) . Approximate dI

What types of operations will/will not plugin the computational graph in the Tensorflow 2?

由 有些话、适合烂在心里 提交于 2021-01-05 07:21:33
问题 Based on this post, we can change the tf.variable threshold = 3 a = np.array([1,2,3,4,5,6]) b = tf.Variable(a) b = tf.where(b >= threshold, 199, b) Will b=tf.where(b>=3, 199, b) be plugin to the computational graph and affect the gradient of b in the back propragration? Or more general questions: What types of operations will/will not plugin the computational graph in the Tensorflow 2 ? 来源： https://stackoverflow.com/questions/65449945/what-types-of-operations-will-will-not-plugin-the

What types of operations will/will not plugin the computational graph in the Tensorflow 2?

由 五迷三道 提交于 2021-01-05 07:21:13
问题 Based on this post, we can change the tf.variable threshold = 3 a = np.array([1,2,3,4,5,6]) b = tf.Variable(a) b = tf.where(b >= threshold, 199, b) Will b=tf.where(b>=3, 199, b) be plugin to the computational graph and affect the gradient of b in the back propragration? Or more general questions: What types of operations will/will not plugin the computational graph in the Tensorflow 2 ? 来源： https://stackoverflow.com/questions/65449945/what-types-of-operations-will-will-not-plugin-the

How to do a Gradient effect from topLeft to botttomRgiht in Flutter Shader?

由 ℡╲_俬逩灬. 提交于 2021-01-03 08:21:45
问题 Hy everyone, I need to know, how do I can create so a Gradient colors from topLeft to bottomRight withhin a shader in flutter like in example 2 in this image? I tried with this mini shader code to do this, but it still doesn't working for me. final Shader linearGradient = LinearGradient( colors: <Color>[ Color(0xff002fff), Color(0xff00f4ff), ], ).createShader(Rect.fromCircle(center: Offset(200, 0), radius: 150)); Could anybody have a ideea, how can this be created? Or it's not impossible
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