Databases
StackOverflow2013
Postsdbo
POHSV / RGB color space conversion
 

Note that there are some explanatory texts on larger screens.

plurals
  1. POHSV / RGB color space conversion
    primarykey
    data
    text
    <p>I found this code in this forum but Im having doubts with the code. </p> <ol> <li><p>in this code snippet "int hi = Convert.ToInt32(Math.Floor(hue / 60)) % 6;" why the complete answer is modulus by 6? (%6)</p></li> <li><p>why is " value = value * 255 " value is multiplied by 255? </p> <p>im reffering to this research paper (p-15 , p-16) and same algorithmic is discussed but I found these differences. </p> <p><a href="http://www.poynton.com/PDFs/coloureq.pdf" rel="nofollow">http://www.poynton.com/PDFs/coloureq.pdf</a></p> <pre><code>public static Color ColorFromHSV(double hue, double saturation, double value) { int hi = Convert.ToInt32(Math.Floor(hue / 60)) % 6; double f = hue / 60 - Math.Floor(hue / 60); value = value * 255; int v = Convert.ToInt32(value); int p = Convert.ToInt32(value * (1 - saturation)); int q = Convert.ToInt32(value * (1 - f * saturation)); int t = Convert.ToInt32(value * (1 - (1 - f) * saturation)); if (hi == 0) return Color.FromArgb(255, v, t, p); else if (hi == 1) return Color.FromArgb(255, q, v, p); else if (hi == 2) return Color.FromArgb(255, p, v, t); else if (hi == 3) return Color.FromArgb(255, p, q, v); else if (hi == 4) return Color.FromArgb(255, t, p, v); else return Color.FromArgb(255, v, p, q); } public void convertToHSV(Color color, out double hue, out double saturation, out double value) { int max = Math.Max(color.R, Math.Max(color.G, color.B)); int min = Math.Min(color.R, Math.Min(color.G, color.B)); hue = color.GetHue(); saturation = (max == 0) ? 0 : 1d - (1d * min / max); value = max / 255d; } </code></pre></li> </ol>
    singulars
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. PTQuestion
    1. This table or related slice is empty.
    1. USVisuddha Karunaratne
    plurals
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. PO
      singulars
      1. PTAnswer
    1. This table or related slice is empty.
    1. COis it because hue changes it color in cylindrical coordinates? guys help me out
      singulars
      1. POHSV / RGB color space conversion
      1. USVisuddha Karunaratne
 

Querying!

 
Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

SQuiL has stopped working due to an internal error.

If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

Reload