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php Programming Glossary: rgb

PHP - Replace colour within image

http://stackoverflow.com/questions/1548534/php-replace-colour-within-image

y imagesy src y src_pix imagecolorat src x y src_pix_array rgb_to_array src_pix check for chromakey color if src_pix_array.. die 'Problem saving output image' imagedestroy out split rgb to components function rgb_to_array rgb a 0 rgb 16 0xFF a 1.. image' imagedestroy out split rgb to components function rgb_to_array rgb a 0 rgb 16 0xFF a 1 rgb 8 0xFF a 2 rgb 0xFF return..

“Distance” between colours in PHP

http://stackoverflow.com/questions/1633828/distance-between-colours-in-php

and return the name. Something like this function getColor rgb these are not the actual rgb values colors array BLUE 0xFFEEBB.. like this function getColor rgb these are not the actual rgb values colors array BLUE 0xFFEEBB RED 0x103ABD GREEN 0x123456.. 0x123456 largestDiff 0 closestColor foreach colors as name rgbColor if colorDiff rgbColor rgb largestDiff largestDiff colorDiff..

Get image color

http://stackoverflow.com/questions/1746530/get-image-color

1 imagecopyresampled pixel image 0 0 0 0 1 1 width height rgb imagecolorat pixel 0 0 color imagecolorsforindex pixel rgb html.. rgb imagecolorat pixel 0 0 color imagecolorsforindex pixel rgb html head title Test Image Average Color title head body style.. Average Color title head body style 'background color rgb php echo color 'red' php echo color 'green' php echo color 'blue'..

RGB to HSV in PHP

http://stackoverflow.com/questions/1773698/rgb-to-hsv-in-php

to convert a RGB triplet to HSV values php image colors rgb hsv share improve this question Another Google search revealed..

“Distance” between colours in PHP

http://stackoverflow.com/questions/1633828/distance-between-colours-in-php

For example I am looking to have an array of HEX values or RGB arrays and I want to find the most similar colour in the array.. in the array for a given colour eg. I pass a function a RGB value and the 'closest' colour in the array is returned php.. To determine close matches you need need to subtract each RGB component seperatly. Example Color 1 #112233 Color 2 #122334..

RGB to HSV in PHP

http://stackoverflow.com/questions/1773698/rgb-to-hsv-in-php

to HSV in PHP In PHP what is the most straightforward way to.. In PHP what is the most straightforward way to convert a RGB triplet to HSV values php image colors rgb hsv share improve.. search revealed this . Here's something else php function RGB_TO_HSV R G B RGB Values Number 0 255 HSV Results Number 0..

Change “HUE” of an image with PHP GD Library?

http://stackoverflow.com/questions/1890409/change-hue-of-an-image-with-php-gd-library

the design. function set_theme_color_header hex info hexToRGB hex utility function that converts hex to rgb token header.gif.. the image's hue Traverse the image pixel by pixel Get the RGB color at pixel using imagecolorat Transform the RGB value into.. the RGB color at pixel using imagecolorat Transform the RGB value into a HSL value Change the hue value leave saturation..

How to check a PNG for grayscale/alpha color type?

http://stackoverflow.com/questions/2057923/how-to-check-a-png-for-grayscale-alpha-color-type

don't do PHP so I don't know how to do that 0 greyscale 2 RGB 3 RGB with palette 4 greyscale alpha 6 RGB alpha The preceding.. do PHP so I don't know how to do that 0 greyscale 2 RGB 3 RGB with palette 4 greyscale alpha 6 RGB alpha The preceding byte.. 0 greyscale 2 RGB 3 RGB with palette 4 greyscale alpha 6 RGB alpha The preceding byte offset 24 gives the number of bits..

Bitwise Flags abandoned?

http://stackoverflow.com/questions/224799/bitwise-flags-abandoned

of abstraction are exposed to hex on a regular basis RGB values for example . Parroting stuff you find on the net will..

Making an Image Greyscale with GD Library

http://stackoverflow.com/questions/276780/making-an-image-greyscale-with-gd-library

share improve this question A common formula to convert RGB to greyscale is Gray scale intensity 0.30R 0.59G 0.11B share..

Detect “overall average” color of the picture

http://stackoverflow.com/questions/3468500/detect-overall-average-color-of-the-picture

glance there can use the histogram of the image channel RGB . Supplement at work I use mostly JavaScript and PHP a little.. 0x33 0x33 blue round round rgb 'blue' 0x33 0x33 thisRGB sprintf ' 02X 02X 02X' red green blue if array_key_exists thisRGB.. ' 02X 02X 02X' red green blue if array_key_exists thisRGB colors colors thisRGB else colors thisRGB 1 arsort colors..

PHP HSV to RGB formula comprehension

http://stackoverflow.com/questions/3597417/php-hsv-to-rgb-formula-comprehension

HSV to RGB formula comprehension I can convert RGB values to HSV with.. HSV to RGB formula comprehension I can convert RGB values to HSV with the following code... r r 255 g g 255 b b.. hg hr if h 0 h 1 if h 1 h 1 But how do you convert HSV to RGB in PHP The following is on wikipedia but I don't understand..