如何使用php和文件上传将图像转换为二进制字符串？

Posted 2021-04-21

我试图转换二进制数据中的图像，但没有在php中获得解决方案。请帮忙

试图实现像这样的网址。 https://www.dcode.fr/binary-image

1。上传图片并转换。 2。这会将我的图像转换为二进制0和1格式。用简单的上传表单在php中尝试做同样的事情。

任何帮助将不胜感激。

答案

在互联网上有很多upload image tutorials，所以生病让你想出那个。

用于将图像转换为二进制。你基本上循环图像并查看每个像素，然后根据它的颜色输出1或0。

function img_to_bin($file, $scale = 100, $fudge = 0) {

    if (!is_int($scale)) {
        throw new InvalidArgumentException('Scale argument invalid expecting int, got: '.gettype($scale));
    }

    $info = getimagesize($file);
    $mime = $info['mime'];

    switch ($mime) {
        case 'image/jpeg':
            $image_create = 'imagecreatefromjpeg';
            break;

        case 'image/png':
            $image_create = 'imagecreatefrompng';
            break;

        case 'image/gif':
            $image_create = 'imagecreatefromgif';
            break;

        default: 
            throw new InvalidArgumentException('Unsupported image type: '.$mime);
    }

    $return = null;

    $img = $image_create($file);
    $img = imagescale($img, $scale, $scale);

    $width = imagesx($img);
    $height = imagesy($img);

    for ($y=0; $y < $height; $y++) {
        $line = [];
        for ($x=0; $x < $width; $x++) {
            // get current pixel colour
            $rgb = imagecolorat($img, $x, $y);
            $r = ($rgb >> 16) & 0xFF;
            $g = ($rgb >> 8 ) & 0xFF;
            $b = $rgb & 0xFF;
            $pixel = ($r + $g + $b)/3;

            // value above 0(white) is 1 
            if ($pixel > $fudge) {
                $line[] = "1";
            } else {
                $line[] = "0";
            }
        }

        $return .= implode('', $line).PHP_EOL;
    }
    return $return;
}

echo img_to_bin("./face.png", 50).PHP_EOL;

所以对于像这样的图像：

将输出：

00000000000000000000000000000000000000000000000000 00000000000000000000011111111100000000000000000000 00000000000000000011111111111111100000000000000000 00000000000000011111111111111111111100000000000000 00000000000000111111111111111111111110000000000000 00000000000011111111111111111111111111100000000000 00000000000111111111111111111111111111110000000000 00000000001111111111111111111111111111111000000000 00000000011111111111111111111111111111111100000000 00000000111111111111111111111111111111111110000000 00000001111111111111111111111111111111111111000000 00000011111111111111111111111111111111111111100000 00000111111111111111111111111111111111111111110000 00001111111111111111111111101111111111111111111000 00001111111111100111111111000111111111111111111000 00001111111111000111111111000111111111111111111000 00011111111111000111111110000111111111111111111100 00011111111111000111111110001111111111111111111100 00011111111111101111111111011111111111111111111100 00011111111111111111111111111111111111111111111100 00011110011111111111111111111111111111011111111100 00011110011111111111111111111111111111001111111100 00001111101111111111111111111111111110011111111000 00001111110111111111111111111111111101111111111000 00000111111011111111111111111111111011111111110000 00000111111100111111111111111111110111111111110000 00000011111110011111111111111111001111111111100000 00000011111111100111111111111110111111111111100000 00000001111111111001111111111001111111111111000000 00000000111111111110000000001111111111111110000000 00000000011111111111111111111111111111111100000000 00000000001111111111111111111111111111111000000000 00000000000111111111111111111111111111110000000000 00000000000011111111111111111111111111100000000000 00000000000000111111111111111111111110000000000000 00000000000000011111111111111111111100000000000000 00000000000000000011111111111111100000000000000000 00000000000000000000001111111000000000000000000000 00000000000000000000000000000000000000000000000000