hsb

How to set HSV color range in OpenCV?

人走茶凉 提交于 2019-12-04 05:16:08
问题 I have a phone and it's HSV histogram like blow,and I want to track this phone's movement.Based on it's histogram,I set image range like this: greenLower = (300, 0, 50) greenUpper = (50, 128,250 ) cv2.inRange(hsv, greenLower, greenUpper) But nothing got detected out when waving the phone,and I am pretty sure it is because color range is wrong,would you tell me how to get color rang setting right?Especially,when HUE values are between [300~50],should I set it to (50~300) or (300~50) due to HUE

Color Theory: How to convert Munsell HVC to RGB/HSB/HSL

大兔子大兔子 提交于 2019-12-02 16:56:52
I'm looking at at document that describes the standard colors used in dentistry to describe the color of a tooth. They quote hue , value , chroma values, and indicate they are from the 1905 Munsell description of color: The system of colour notation developed by A. H. Munsell in 1905 identifies colour in terms of three attributes: HUE, VALUE (Brightness) and CHROMA (saturation) [ 15 ] HUE (H): Munsell defined hue as the quality by which we distinguish one colour from another. He selected five principle colours: red, yellow, green, blue, and purple; and five intermediate colours: yellow-red,

How to set HSV color range in OpenCV?

我是研究僧i 提交于 2019-12-02 07:07:45
I have a phone and it's HSV histogram like blow,and I want to track this phone's movement.Based on it's histogram,I set image range like this: greenLower = (300, 0, 50) greenUpper = (50, 128,250 ) cv2.inRange(hsv, greenLower, greenUpper) But nothing got detected out when waving the phone,and I am pretty sure it is because color range is wrong,would you tell me how to get color rang setting right?Especially,when HUE values are between [300~50],should I set it to (50~300) or (300~50) due to HUE is a cirle. Phone HSV histogram: You have wrongly set the upper and lower bounds, they must be:

Objective-C RGB to HSB

一曲冷凌霜 提交于 2019-11-30 20:52:42
问题 Let's say I've got the colour FF0000, which is red. Finding a darker colour is easy, I just type maybe CC instead of the FF, but let's say I've got the colour AE83FC, which is a complicated colour, how the heck would I find a lighter or darker version of it automatically? I figured the easy way to do this is to convert my RGB to HSB [Hue, Saturation, Brightness] How would I do that in Objective-C? Let's say I've got a RGB which is: 1.0, 0.0, 0.0. That's red. CGFloat r = 1.0; CGFloat g = 0.0;

Converting an RGBW color to a standard RGB/HSB representation

≡放荡痞女 提交于 2019-11-30 15:45:35
问题 I am building an interface for light management in a home automation system. I managed to control standard on/off and dimmable light for various providers with little problem, but now I am stuck with a problem related to RGB light. The light I am currently using is an RGBW led strip - specifically, I am working with a low-cost RGBW light: the light is composed by four led and every led can be controlled individually. To be more clear - I am working on some c# code that should retrieve the

Does the .Net Color struct use an HSB or HSL colour space?

那年仲夏 提交于 2019-11-30 14:58:41
问题 As I understand it HSL and HSB colour spaces are very similar, both use the same 0-360 colour wheel for hue and the same 0-1 value for saturation. The one difference between them is that in the HSB model you have brightness, where 0 is black and 1 is the colour at full intensity, while in HSL you have lightness/luminosity, where 0 is still black but 1 is white. The .net Color struct uses the RGB space, but has GetHue() , GetSaturation() and GetBrightness() functions. The documentation here is

Converting an RGBW color to a standard RGB/HSB representation

折月煮酒 提交于 2019-11-30 14:56:00
I am building an interface for light management in a home automation system. I managed to control standard on/off and dimmable light for various providers with little problem, but now I am stuck with a problem related to RGB light. The light I am currently using is an RGBW led strip - specifically, I am working with a low-cost RGBW light: the light is composed by four led and every led can be controlled individually. To be more clear - I am working on some c# code that should retrieve the currently selected color and display it in the UI, and enable the user to specify a new color for the

Does the .Net Color struct use an HSB or HSL colour space?

断了今生、忘了曾经 提交于 2019-11-30 12:43:18
As I understand it HSL and HSB colour spaces are very similar, both use the same 0-360 colour wheel for hue and the same 0-1 value for saturation. The one difference between them is that in the HSB model you have brightness, where 0 is black and 1 is the colour at full intensity, while in HSL you have lightness/luminosity, where 0 is still black but 1 is white. The .net Color struct uses the RGB space, but has GetHue() , GetSaturation() and GetBrightness() functions. The documentation here is confusing. For GetBrightness() : /// <summary>Gets the hue-saturation-brightness (HSB) brightness

HSB vs HSL vs HSV

一笑奈何 提交于 2019-11-28 18:13:34
I am making a Color class as a part of a very basic graphics API in c++. So I decided to take a look at Microsoft's .NET framework and noticed that their Color class has functions for HSB. Then I started a research to determine whether I should provide HSB, HSL or HSV or ALL of them in my class. So, I have 3 questions on HSB, HSL, HSV: Is HSB same as HSL? If not, why isn't there an HSBL or even HSBLV? I find many different methods of calculating these values, can someone show me the FASTEST ones? JoseV Is HSB same as HSL? No, HSB is the same as HSV but HSL is different. All these are used as a

Algorithm to Switch Between RGB and HSB Color Values

谁说我不能喝 提交于 2019-11-27 23:16:52
I read the article Algorithm to Switch Between RGB and HSB Color Values Type RGBColor Red As Byte Green As Byte Blue As Byte End Type Type HSBColor Hue As Double Saturation As Double Brightness As Double End Type Function RGBToHSB(rgb As RGBColor) As HSBColor Dim minRGB, maxRGB, Delta As Double Dim h, s, b As Double h = 0 minRGB = Min(Min(rgb.Red, rgb.Green), rgb.Blue) maxRGB = Max(Max(rgb.Red, rgb.Green), rgb.Blue) Delta = (maxRGB - minRGB) b = maxRGB If (maxRGB <> 0) Then s = 255 * Delta / maxRGB Else s = 0 End If If (s <> 0) Then If rgb.Red = maxRGB Then h = (CDbl(rgb.Green) - CDbl(rgb.Blue