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Yoshihiro Yamazaki yoya

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yoya / readexif.php
Created May 19, 2016 19:48
Exif を PHP で分解してみた (異常系は手抜き)
<?php
// ref) http://dsas.blog.klab.org/archives/52123322.html
class Exif {
private $data;
private $byteOrder; // 1:Big Endian, 2:Little Endian
private $IFDs = array();
private $cursol = 0;
const IFD_OFFSET_BASE = 6;
@yoya
yoya / testimageNG.php
Created June 30, 2016 06:10
test image generation (NG)
<?php
function cramp255($v) {
if ($v < 0) {
return 0;
}
return ($v<=255)?$v:255;
}
function getRGBA($x, $y, $width, $height) {
@yoya
yoya / depth4colortable.php
Created July 13, 2016 12:52
RGB444 の色を全部使うだけの画像
<?php
ini_set("memory_limit", '2G');
$nPixels = pow(2, 4 + 4 + 4);
$width = (int) sqrt($nPixels);
$height = $nPixels /$width;
$im = imagecreatetruecolor($width, $height);
if (! $im) {
@yoya
yoya / dropimage.html
Last active July 27, 2016 13:36
画像ファイルをドロップしてピクセル値を編集するサンプル
<html>
<head>
<title> Image Drop Sample </title>
<style>
body { background-color: #eff; }
canvas { border: 2px solid #888; }
</style>
</head>
<body<html>
<head>
@yoya
yoya / gifparse.go
Last active October 26, 2016 19:02
GIF parser sample
// 2016/10/27 (c)yoya@awm.jp
// ref) https://github.com/yoya/IO_GIF/blob/master/IO/GIF.php
package main
import (
"encoding/binary"
"fmt"
"io/ioutil"
"math"
@yoya
yoya / gifoneframeonly.go
Last active October 27, 2016 01:38
GIF one frame only sample.
// 2016/10/27 (c) yoya@awm.jp
// ref) https://github.com/yoya/IO_GIF/blob/master/IO/GIF.php
package main
import (
"fmt"
"io/ioutil"
"math"
"os"
@yoya
yoya / gifoneframeonly.go
Last active October 27, 2016 02:28
GIF one frame only sample. (take 2: with error handling)
// 2016/10/27 (c) yoya@awm.jp
// ref) https://github.com/yoya/IO_GIF/blob/master/IO/GIF.php
package main
import (
"errors"
"fmt"
"io/ioutil"
"math"
@yoya
yoya / rgb.sh
Last active February 2, 2017 08:42
RGB plus compose
convert -size 200x200 xc:black -fill "#f00" -draw "circle 100,75 60,35" r.png
convert -size 200x200 xc:black -fill "#0f0" -draw "circle 75,125 35,85" g.png
convert -size 200x200 xc:black -fill "#00f" -draw "circle 125,125 85,85" b.png
composite r.png -compose plus g.png rg.png
composite rg.png -compose plus b.png rgb.png
@yoya
yoya / cmy.sh
Created February 2, 2017 08:43
CMY multiply compose
convert -size 200x200 xc:white -fill "#0ff" -draw "rectangle 50,30 150,130" c.png
convert -size 200x200 xc:white -fill "#f0f" -draw "rectangle 20,70 120,170" m.png
convert -size 200x200 xc:white -fill "#ff0" -draw "rectangle 80,70 180,170" y.png
composite c.png -compose multiply m.png cm.png
composite cm.png -compose multiply y.png cmy.png
@yoya
yoya / getMetImages.php
Last active February 17, 2017 04:57
Metropolitan Museum of Art Public Images Downloader
<?php
/*
* Metropolitan Museum of Art Public Images Downloader
* (c) 2017/02/17(Fri) yoya@awm.jp
* Usage) php getMetImages.php MetObjects.csv
*/
$file = new SplFileObject($argv[1]);
$file->setFlags(SplFileObject::READ_CSV | SplFileObject::READ_AHEAD | SplFileObject::SKIP_EMPTY | SplFileObject::DROP_NEW_LINE);
$idx = 0;