color-picker

问题 I have image with kind of light purple image in background and character in dark blue. My goal is to identify text from the image. So I'm trying to remove light purple color from background so that my image will be free of noise, but I can't find the exact color code for that image as it is somewhat different everywhere, so I'm not able to mask image. Here's my code import numpy as np from PIL import Image im = Image.open('capture.png') im = im.convert('RGBA') data = np.array(im) rgb = data[:

问题 I am having a strange issue using the integrated color picker of Xcode (version 6.3): After I assign a color to a any item (in my case a UIButton) and then try to enter a new hue value, just by clicking the textfield the color changes . All three values (hue, saturation and brightness) change. Funny enough this change is visible as the color of the button changes, but the actual values stay the same until expecting a color in another view and then switching back to the button inspection, the

问题 I would like to change the color palette. The colors are by default have a transparency of 30%. Is it possible to replace the color palette? 回答1: Based on this solution, you can replace the color palette once you get the rectangles and their colors. For instance, you can make brighter all the palette: @Override public void start(Stage primaryStage) { ColorPicker picker = new ColorPicker(); StackPane root = new StackPane(picker); Scene scene = new Scene(root, 500, 400); primaryStage.setScene

问题 I would like to change the color palette. The colors are by default have a transparency of 30%. Is it possible to replace the color palette? 回答1: Based on this solution, you can replace the color palette once you get the rectangles and their colors. For instance, you can make brighter all the palette: @Override public void start(Stage primaryStage) { ColorPicker picker = new ColorPicker(); StackPane root = new StackPane(picker); Scene scene = new Scene(root, 500, 400); primaryStage.setScene

问题 How to draw a colorpicker on HTML5 canvas? 回答1: A basic example would be using getImageData : http://jsfiddle.net/eGjak/60/. var ctx = $('#cv').get(0).getContext('2d'); for(var i = 0; i < 30; i++) { for(var j = 0; j < 30; j++) { ctx.fillStyle = 'rgb(' + ((i/30*255)|0) + ',' + ((j/30*255)|0) + ',' + '0)'; ctx.fillRect(i * 10, j * 10, 10, 10); } } $('#cv').click(function(e) { // get pixel under mouse cursor var data = ctx.getImageData(e.offsetX, e.offsetY, 1, 1).data; alert('rgb: ' + [].slice

问题 Does anyone knows a javascript only way to open the browser-standard colorpicker, without using a html field? so i want a javascript what does exactly the same a a click on the html input color field. Bart 回答1: You are going to have to use the input field, you can just hide it off the page. Issue here is the fact that the color dialog requires a click in browsers in order to open up the color dialog. It will not work if you just call click() document.getElementById("xxx").addEventListener(

问题 Is there a Webkit-specific CSS style that will allow me to control the color/size/style of the box around the color in an input[type=color] ? I'm setting the color and background color of the input already so it looks good with a cross-compatibility polyfill I'm using for older Chrome and Firefox. But now that Chrome actually has a color picker, there's a box around the color which leaves a 1px grey box floating in the middle of the input when both color and background color of the input are

问题 Is there a Webkit-specific CSS style that will allow me to control the color/size/style of the box around the color in an input[type=color] ? I'm setting the color and background color of the input already so it looks good with a cross-compatibility polyfill I'm using for older Chrome and Firefox. But now that Chrome actually has a color picker, there's a box around the color which leaves a 1px grey box floating in the middle of the input when both color and background color of the input are

问题 Is there a Webkit-specific CSS style that will allow me to control the color/size/style of the box around the color in an input[type=color] ? I'm setting the color and background color of the input already so it looks good with a cross-compatibility polyfill I'm using for older Chrome and Firefox. But now that Chrome actually has a color picker, there's a box around the color which leaves a 1px grey box floating in the middle of the input when both color and background color of the input are

问题 Is there a Webkit-specific CSS style that will allow me to control the color/size/style of the box around the color in an input[type=color] ? I'm setting the color and background color of the input already so it looks good with a cross-compatibility polyfill I'm using for older Chrome and Firefox. But now that Chrome actually has a color picker, there's a box around the color which leaves a 1px grey box floating in the middle of the input when both color and background color of the input are