User Tools
macro:rgbtohex
Differences
This shows you the differences between two versions of the page.
| — |
macro:rgbtohex [2019/04/12 13:13] (current) |
||
|---|---|---|---|
| Line 1: | Line 1: | ||
| + | ====== RGBtoHEX ====== | ||
| + | **This simple macro exemplifies how to use ImageJ macro functions to convert RGB color values into Hex notation.** | ||
| + | ---- | ||
| + | == Code: == | ||
| + | <code java> | ||
| + | // This simple macro exemplifies how to use ImageJ macro functions to convert RGB color | ||
| + | // values into Hex notation. | ||
| + | // | ||
| + | // After obtaining the RGB tripplet of the current foregound color, the macro prompts | ||
| + | // the user to choose an alpha blending value. Choice is then converted into a four-byte | ||
| + | // hex number (#AARRGGBB) that is copied to the clipboard and can be pasted directly into | ||
| + | // the 'Image>Overlay>Add Selection... [b]' dialog box. | ||
| + | // | ||
| + | // As for RGB values, alpha values range from 0 (fully transparent) to 255 (solid color). | ||
| + | // This wikipedia article on 'web colors' has more information on hex color notation: | ||
| + | // http://en.wikipedia.org/wiki/Web_colors | ||
| + | // | ||
| + | // T.Ferreira, 20010.01 | ||
| + | |||
| + | fColor = getValue("color.foreground"); | ||
| + | r = (fColor>>16)&0xff; g = (fColor>>8)&0xff; b = fColor&0xff; | ||
| + | fColor = ""+r+", "+g+", "+b; | ||
| + | |||
| + | Dialog.create("RGB to Hex"); | ||
| + | Dialog.addString("RGB values (0-255) separated by \",\":", fColor); | ||
| + | Dialog.addNumber("Opacity value (0-100%):",100); | ||
| + | Dialog.addMessage("(These values refer to current foreground color)"); | ||
| + | Dialog.show; | ||
| + | cColor = Dialog.getString; | ||
| + | cAlpha = Dialog.getNumber; | ||
| + | |||
| + | fColor = split(cColor,","); | ||
| + | if(fColor.length!=3) | ||
| + | exit("Invalid input"); | ||
| + | r = toHex(fColor[0]); g = toHex(fColor[1]); b = toHex(fColor[2]); | ||
| + | fAlpha = toHex(255*cAlpha/100); | ||
| + | hex= "#" + pad(fAlpha) + ""+pad(r) + ""+pad(g) + ""+pad(b); | ||
| + | |||
| + | String.resetBuffer; String.copy(hex); | ||
| + | showMessage("RGB to Hex", "RGB value: "+ cColor+" ("+cAlpha+"% Opacity)\n"+ | ||
| + | "HEX value: "+ hex +"\n \n"+ | ||
| + | "(Result has been copied to clipboard)"); | ||
| + | |||
| + | function pad(n) { | ||
| + | n = toString(n); | ||
| + | if(lengthOf(n)==1) n = "0"+n; | ||
| + | return n; | ||
| + | } | ||
| + | |||
| + | </code> | ||
macro/rgbtohex.txt ยท Last modified: 2019/04/12 13:13 (external edit)
Page Tools
