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Questions tagged [hsv]

HSV is cylindrical color space that determines colors by hue (0°-360°), saturation (percentage of white) and value (percentage of black).

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Calculate perceived equal steps in color brightness

I've been trying to figure this out for a while, and it's driving me mad. As most people know, if you draw 10 rectangles next to each other, ranging from white to black in equal steps of HSV brightness, they will not be perceived equal to the eye.…
Ronze
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projecting light and shadows on a surface

Hi I am trying to extract the lighting and the shadow from one surface and apply it to another type of surface. I convert the image to HSV and extract the Hue component and plot it which seems to give me a good indication of where the lighting and…
user2242037
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Matlab Convertion of HSV type in Matlab

I'm looking for making image corrections in a movie using matlab. I've googling for examples to splitting the movie into images, and then another example to improve image's quality. As I'm using several examples, I got into a issue and I was…
João Filipe
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Yellow and Orange color identifying with Android

Me and my project group are making an Paintball-like Android app. When you shoot someone it checks the following things: Is the opponent's color in the cross-hair (center of screen)? (either fluor yellow or fluor orange vests) Is their an opponent…
Kevin Cruijssen
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Special color histogram in SimpleCV

I need to cunstruct color histogram (using HSV color space) in SimpleCV, the problem is that the histogram needs cointain only colors where saturation and brightness are over certain level (which is different of each channel). How do I achieve…
user1819238
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Efficient Fast Color Extraction Emgucv

So I'm new to image processing, and i'm kinda learning emgucv right now.. ..I want to track a Ball with a specific color- orange.. however.. so..what i needed was to threshold, isolate , or binarize (i don't know the right term).. the image to…
muffin
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Compute HSL main color values (red, yellow, green, magenta, blue and purple)

How do I mathematically compute the values for HSL main colors? I can hardcode them in the program, of course, but I remain interested how can I determine if the color is main or combined. There must be an inscribed hexagon in the HSL color circle,…
Tomáš Zato
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Change the V of HSV of an specific place at an image with OpenCV and C++

I'm new with OpenCV and I'm using it for change the luminosity of an image. In my image, here: https://docs.google.com/file/d/0B9LaMgEERnMxQUNKbndBODJ5TXM/edit, there's a big space reflecting the light of the ambiance just in one part of it. At…
Hime
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How to create a Mat image in OpenCV if i have the values of h, s and v?

I used mathematical calculations to convert the r,g,b values of a pixel into the h,s and v values. How do i use these h, s, and v values to create an image and be able to show them using imshow("HSV", hsv_image). It would be better if the answer is…
nisargthakkar
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Perform Canny Edge in HSV Image

I had converted an BGR image to HSV to detect the black circles, then how I perform Canny edge on the HSV image? I had tried but it doesn't works at all. IplImage *capturedImg = cvLoadImage("template.jpg",1); IplImage* imgHSV =…
Din Hee
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RGB to HSV color conversion android using Opencv

i've tried my code to take a picture from camera and convert it into a HSV color space from RGB, but the result didn't show the HSV color, it shows something unusual, please take a look here's my code public void onCreate(Bundle savedInstanceState)…
user1802057
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Convert RGB value to HSV/HSL

Possible Duplicate: RGB to HSV in PHP Please help,I googled many script but all not work .. Can somebody tell me how to write a function to do the conversion?
Blazce Zeno
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HorizontalScrollView with imageviews as a child and while scrolling the center of the image in the screen should play animation?

I am new android platform app development. my problem is center lock the image without using gallery view and that image we play an animation.while scrolling animated image should be adjust with center of screen. Currently i am using…
Ganesh
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How to compare two color histogram

I used a map> structure to store the mapping of file name to its HSV color histogram.And there are 100 elements in this map as a image DB.If now comes a image,and I have get the input image's histogram,how can I do the…
zxi
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How can I change lightness hue and partially desaturate an image in ImageMagick?

I have a PNG which (besides a white spot and transparency in the background) is a pretty straight blue. I would like to use convert from ImageMagick to partially desaturate it, so that I can create images with the original blue at one extreme, and…
Christos Hayward
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