hsv

问题 In PHP, what is the most straightforward way to convert a RGB triplet to HSV values? 回答1: <?php function RGB_TO_HSV ($R, $G, $B) // RGB Values:Number 0-255 { // HSV Results:Number 0-1 $HSL = array(); $var_R = ($R / 255); $var_G = ($G / 255); $var_B = ($B / 255); $var_Min = min($var_R, $var_G, $var_B); $var_Max = max($var_R, $var_G, $var_B); $del_Max = $var_Max - $var_Min; $V = $var_Max; if ($del_Max == 0) { $H = 0; $S = 0; } else { $S = $del_Max / $var_Max; $del_R = ( ( ( $var_Max - $var_R )

问题 I need to accurately convert HSB to RGB but I am not sure how to get around the problem of turning decimals into whole numbers without rounding. This is the current function I have out of a colorpicker library: HSBToRGB = function (hsb) { var rgb = { }; var h = Math.round(hsb.h); var s = Math.round(hsb.s * 255 / 100); var v = Math.round(hsb.b * 255 / 100); if (s == 0) { rgb.r = rgb.g = rgb.b = v; } else { var t1 = v; var t2 = (255 - s) * v / 255; var t3 = (t1 - t2) * (h % 60) / 60; if (h ==

问题 How to change RGB color to HSV? In C# language. I search for very fast method without any external library. 回答1: Have you considered simply using System.Drawing namespace? For example: System.Drawing.Color color = System.Drawing.Color.FromArgb(red, green, blue); float hue = color.GetHue(); float saturation = color.GetSaturation(); float lightness = color.GetBrightness(); Note that it's not exactly what you've asked for (see differences between HSL and HSV and the Color class does not have a

问题 I want to design a program that can help me assess between 5 pre-defined colors which one is more similar to a variable color, and with what percentage. The thing is that I don\'t know how to do that manually step by step. So it is even more difficult to think of a program. More details: The colors are from photographs of tubes with gel that as different colors. I have 5 tubes with different colors were each is representative of 1 of 5 levels. I want to take photographs of other samples and

问题 I have an image of a coffee can with an orange lid position of which I want to find. Here is it . gcolor2 utility shows HSV at the center of the lid to be (22, 59, 100). The question is how to choose the limits of the color then? I tried min = (18, 40, 90) and max = (27, 255, 255), but have got unexpected Here is the Python code: import cv in_image = \'kaffee.png\' out_image = \'kaffee_out.png\' out_image_thr = \'kaffee_thr.png\' ORANGE_MIN = cv.Scalar(18, 40, 90) ORANGE_MAX = cv.Scalar(27,