hsl

How to apply HSB color filters to UIImage

由 旧街凉风 提交于 2019-12-06 13:14:23
I've been struggling for a few days for a project on UIImage colorization. The idea is that the app will embark a set of images that I will have to colorize with values retrieved from a webservice. Some sort of themes if you wish. The designer I work with gave me a background image on all of his Photoshop values. The first problem is that Photoshop uses HSL and iOS uses HSB. So the first challenge was to translate the values from Photoshop. Photoshop HSL: -28 (range -180 => +180), 100 (range -100 => +100), 25 (range -100 => +100). Luckily I found some code online, here it is . //adapted from

Any bug with hsla(0, 0%, 0%, 0), becoming hsla(0, 0, 0, 0)? (missing percent sign)

由 空扰寡人 提交于 2019-12-06 10:45:26
问题 I set up a text color as hsla(0, 0%, 0%, 0) to hide it. But sometimes it became hsla(0, 0, 0, 0) , which can't be executed by browser. I can fix this if I go the site with incognito mode. I have no idea if it's a bug in Chrome, from the server or just cache problem. If so, why it happens so often and how to fix it? 回答1: Zero's should be unitless in css. Lengths refer to distance measurements.The format of a length value (denoted by in this specification) is a (with or without a decimal point)

Determine HSL variation to transform a color in another one

由 ⅰ亾dé卋堺 提交于 2019-12-06 07:01:50
问题 I use LESS , and I would like to take advantage by various integrated color functions that allow to set only few basic colors, and then derive others changing Hue, Saturation, Lightness, Spin, ecc. Let's imagine that we have the following 2 colors (a light-green and a dark-green in this example) in my colorizer: @primary-color: rgb(0,100,60); @secondary-color: rgb(185,215,50); I would like to explicitly set only @primary-color and then obtain @secondary-color after an appropriate HSL

PHP function to convert HSL to RGB or Hex

由 人走茶凉 提交于 2019-12-06 01:51:48
Does anyone know a PHP function (for >5.3) which can convert an HSL color to either RGB or Hex? I've tried a dozen Google searches and none of the functions I have found work as expected. It doesn't matter whether the function converts to RGB or hex because converting between those two is trivial. The inputs are HSL values for CSS (Hue: 0–360, Saturation: 0–100, Lightness: 0–100). Edit: Specifying the input and output format would be a bonus :) enhzflep Taking the code from one of the answers in the link of Jim's comment ( PHP HSV to RGB formula comprehension ), we can compute it as follows: <

How can I use the HSL colorspace in Java?

由 梦想与她 提交于 2019-12-04 16:11:10
问题 I've had a look at the ColorSpace class, and found the constant TYPE_HLS (which presumably is just HSL in a different order). Can I use this constant to create a Color from hue, saturation, and luminosity? If not, are there any Java classes for this, or do I need to write my own? 回答1: Most of the given answers here seem to assume that HSL == HSB, which is false. The HSB colorspace is useful (and used) in many cases, but there is one notable exception: CSS. The non-RGB css color functions, hsl

How do you lightness thresh hold with HSL on OpenCV?

由 大兔子大兔子 提交于 2019-12-04 14:53:41
问题 There is a project that im working on which required the color white detection, after some research i decided to use covert RGB image to HSL image and thresh hold the lightness to get the color white, im working with openCV so wonder if there is a way to do it. enter image description here 回答1: You can do it with 4 easy steps: Convert HLS img = cv2.imread("HLS.png") imgHLS = cv2.cvtColor(img, cv2.COLOR_BGR2HLS) Get the L channel Lchannel = imgHLS[:,:,1] Create the mask #change 250 to lower

Determine HSL variation to transform a color in another one

由 孤街醉人 提交于 2019-12-04 11:53:27
I use LESS , and I would like to take advantage by various integrated color functions that allow to set only few basic colors, and then derive others changing Hue, Saturation, Lightness, Spin, ecc. Let's imagine that we have the following 2 colors (a light-green and a dark-green in this example) in my colorizer: @primary-color: rgb(0,100,60); @secondary-color: rgb(185,215,50); I would like to explicitly set only @primary-color and then obtain @secondary-color after an appropriate HSL transformation. (for example darken(hsl(90, 80%, 50%), 20% ) ) Is there any way to determine what hsl setting I

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

由 别来无恙 提交于 2019-12-04 07:39:51
问题 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

How can I use the HSL colorspace in Java?

由 六月ゝ 毕业季﹏ 提交于 2019-12-03 10:11:39
I've had a look at the ColorSpace class, and found the constant TYPE_HLS (which presumably is just HSL in a different order). Can I use this constant to create a Color from hue, saturation, and luminosity? If not, are there any Java classes for this, or do I need to write my own? Most of the given answers here seem to assume that HSL == HSB, which is false. The HSB colorspace is useful (and used) in many cases, but there is one notable exception: CSS. The non-RGB css color functions, hsl() and hsla() are HSL, not HSB. As such, it is very useful to be able to convert to and from HSL in java.

CSS: lighten an element on hover

由 蹲街弑〆低调 提交于 2019-12-03 04:44:00
问题 Assuming an element is at 100% saturation, opacity, etc... how can I have its background become slightly lighter when it is hovered? The use case is that I'm allowing a user to hover over any element on a page. I don't want to go around determining each colors equivalent at 80% opacity. One method is to change the opacity: 0.4 but I only want the background to change. 回答1: It's a long time ago but you can do something like this: .element { background-color: red; } .element:hover { box-shadow:
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