ImagickPixel::isSimilar
(PECL imagick 2.0.0)
ImagickPixel::isSimilar — Check the distance between this color and another
Description
bool ImagickPixel::isSimilar ( ImagickPixel $color , float $fuzz )Warning
This function is currently not documented; only its argument list is available.
Checks the distance between the color described by this ImagickPixel object and that of the provided object, by plotting their RGB values on the color cube. If the distance between the two points is less than the fuzz value given, the colors are similar. Deprecated in favour of ImagickPixel::isPixelSimilar().
Parameters
color
The ImagickPixel object to compare this object against.
fuzz
The maximum distance within which to consider these colors as similar. The theoretical maximum for this value is the square root of three (1.732).
Return Values
Returns TRUE on success.
Examples
Example #1 ImagickPixel::isSimilar()
<?php
????????//?The?tests?below?are?written?with?the?maximum?distance?expressed?as?255
????????//?so?we?need?to?scale?them?by?the?square?root?of?3?-?the?diagonal?length
????????//?of?a?unit?cube.
????????$root3?=?1.732050807568877;
????????$tests?=?array(
????????????['rgb(245,?0,?0)',??????'rgb(255,?0,?0)',???9?/?$root3,?????????false,],
????????????['rgb(245,?0,?0)',??????'rgb(255,?0,?0)',??10?/?$root3,?????????true,],
????????????['rgb(0,?0,?0)',????????'rgb(7,?7,?0)',?????9?/?$root3,?????????false,],
????????????['rgb(0,?0,?0)',????????'rgb(7,?7,?0)',????10?/?$root3,?????????true,],
????????????['rgba(0,?0,?0,?1)',????'rgba(7,?7,?0,?1)',?9?/?$root3,?????????false,],
????????????['rgba(0,?0,?0,?1)',????'rgba(7,?7,?0,?1)',????10?/?$root3,?????true,],
????????????['rgb(128,?128,?128)',??'rgb(128,?128,?120)',???7?/?$root3,?????false,],
????????????['rgb(128,?128,?128)',??'rgb(128,?128,?120)',???8?/?$root3,?????true,],
????????????['rgb(0,?0,?0)',????????'rgb(255,?255,?255)',???254.9,??????????false,],
????????????['rgb(0,?0,?0)',????????'rgb(255,?255,?255)',???255,????????????true,],
????????????['rgb(255,?0,?0)',??????'rgb(0,?255,?255)',?????254.9,??????????false,],
????????????['rgb(255,?0,?0)',??????'rgb(0,?255,?255)',?????255,????????????true,],
????????????['black',???????????????'rgba(0,?0,?0)',????????0.0,????????????true],
????????????['black',???????????????'rgba(10,?0,?0,?1.0)',??10.0?/?$root3,??true],);
????????$output?=?"<table?width='100%'?class='infoTable'><thead>
????????????????<tr>
????????????????<th>
????????????????Color?1
????????????????</th>
????????????????<th>
????????????????Color?2
????????????????</th>
????????????????<th>
????????????????????Test?distance?*?255
????????????????</th>
????????????????<th>
????????????????????Is?within?distance
????????????????</th>
????????????????</tr>
????????</thead>";
????????$output?.=?"<tbody>";
????????foreach?($tests?as?$testInfo)?{
????????????$color1?=?$testInfo[0];
????????????$color2?=?$testInfo[1];
????????????$distance?=?$testInfo[2];
????????????$expectation?=?$testInfo[3];
????????????$testDistance?=?($distance?/?255.0);
????????????$color1Pixel?=?new?\ImagickPixel($color1);
????????????$color2Pixel?=?new?\ImagickPixel($color2);
????????????$isSimilar?=?$color1Pixel->isPixelSimilar($color2Pixel,?$testDistance);
????????????if?($isSimilar?!==?$expectation)?{
????????????????echo?"Test?distance?failed.?Color?[$color1]?compared?to?color?[$color2]?is?not?within?distance?$testDistance?FAILED.".NL;
????????????}
????????????$layout?=?"<tr>
????????????????<td>%s</td>
????????????????<td>%s</td>
????????????????<td>%s</td>
????????????????<td?style='text-align:?center;'>%s</td>
????????????</tr>";
????????????
????????????$output?.=?sprintf(
????????????????$layout,
????????????????$color1,
????????????????$color2,
????????????????$distance,
????????????????$isSimilar???'yes'?:?'no'
????????????);
????????}
????????$output?.=?"</tbody></table>";
????????
????????return?$output;
?>← ImagickPixel::isPixelSimilarQuantum
ImagickPixel::setColor →
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