gradient

问题 I have tried implementing a basic version of shi-tomasi corner detection algorithm. The algorithm works fine for corners but I came across a strange issue that the algorithm also gives high values for slanted(titled) edges. Here's what i did Took gray scale image computer dx, and dy of the image by convolving it with sobel_x and sobel_y Took a 3 size window and moved it across the image to compute the sum of the elements in the window. computed sum of the window elements from the dy image and

问题 I need to create a "sharp" gradient for both the header and navigation text on a site I'm building. I'm trying to make it as pure HTML5/CSS3 as possible, and would like to stick with @font-face and not move over to Cufon. What I mean by sharp gradient is two colors, with no blending in between. Example: http://dl.dropbox.com/u/12147973/sharp-gradient.png I found a way to do it in Cufon, but as I said, I want to stick to @font-face . Cufon gives me too much grief in IE, and I really love how

问题 I need to create a "sharp" gradient for both the header and navigation text on a site I'm building. I'm trying to make it as pure HTML5/CSS3 as possible, and would like to stick with @font-face and not move over to Cufon. What I mean by sharp gradient is two colors, with no blending in between. Example: http://dl.dropbox.com/u/12147973/sharp-gradient.png I found a way to do it in Cufon, but as I said, I want to stick to @font-face . Cufon gives me too much grief in IE, and I really love how

问题 tf.raw_ops.TanhGrad says that grad = dy * (1 - y*y) , where y = tanh(x) . But I think since dy / dx = 1 - y*y , where y = tanh(x) , grad should be dy / (1 - y*y) . Where am I wrong? 回答1: An expression like dy / dx is a mathematical notation for the derivative, it is not an actual fraction. It is meaningless to move dy or dx around individually as you would with a numerator and denominator. Mathematically, it is known that d(tanh(x))/dx = 1 - (tanh(x))^2 . TensorFlow computes gradients

问题 The example below: h1 { background-image: linear-gradient(to right, #00b140, #bcda00 17%, #bcda00 60%, #00b140); background-clip: text; -webkit-background-clip: text; -webkit-text-fill-color: transparent; } <h1>Text11111</h1> Lacks full cross-browser support. Any suggestions? 回答1: Here is clip for background with gradient /** -webkit-background-clip: text Polyfill # What? # A polyfill which replaces the specified element with a SVG in browser where "-webkit-background-clip: text" is not

问题 Is it possible to stroke an SVG polyline with an horizontal linear gradient where the gradient's angle changes at every polyline vertex? it would look something like this: 回答1: Have a look at tubefy by Israel Eisenberg. There's not currently anything in svg that will give you exactly what you're asking for declaratively. However, tubefy makes use of svg for rendering, and can produce advanced gradients such as the one you're looking for. 来源： https://stackoverflow.com/questions/6295736

问题 I am working on a project where I need to implement center gradient in UITextView. It must be something like attached image. I cannot use any image at upper of UITextView because I want user interaction in UITextView. Please provide your suggestions. Thanks 回答1: If you apply CAGRradient Layer on UITextView and set [txtView.layer setMask:gradient] this will create problem while scrolling means the gradient layer will scroll. To overcome from this problem you must use a UiView working as a

问题 I am working on a project where I need to implement center gradient in UITextView. It must be something like attached image. I cannot use any image at upper of UITextView because I want user interaction in UITextView. Please provide your suggestions. Thanks 回答1: If you apply CAGRradient Layer on UITextView and set [txtView.layer setMask:gradient] this will create problem while scrolling means the gradient layer will scroll. To overcome from this problem you must use a UiView working as a

问题 I want to add gradient only to the border of my editText , I can add gradient but it takes the entire background . How can I apply gradient only to the border , and the rest should be transparent? 回答1: Add the edittext in a layout Set gradient background color for that layout Set margin 1dp for edittext . Set white background for edittext i think now it's displays like your expectation, thank you 回答2: This one does the trick :) <?xml version="1.0" encoding="utf-8"?> <layer-list xmlns:android=

问题 I need to make the titles in BottomNavigationView in android be of a gradient color. <?xml version="1.0" encoding="utf-8"?> <gradient xmlns:android="http://schemas.android.com/apk/res/android" android:startColor="@color/gradientLeft" android:endColor="@color/gradientRight" android:angle="0"/> I have the colors set up and it works with e.g. icons on BtmNavView, but I can't get the titles to change their color to a gradient. <com.google.android.material.bottomnavigation.BottomNavigationView