我使用python 2.7從hexa字符串獲取圖像
我在DB中有一個字符串表示Hexa中的圖像。例如
sdata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
現在,我想使用此字符串創建圖像。我知道該圖像是24x24 BMP(或PNG?)圖像。
我知道php代碼來得到它,但不是python。
PHP:
function imagecreatefrombmpstring($im) {
$header = unpack("vtype/Vsize/v2reserved/Voffset", substr($im, 0, 14));
$info = unpack("Vsize/Vwidth/Vheight/vplanes/vbits/Vcompression/Vimagesize/Vxres/Vyres/Vncolor/Vimportant", substr($im, 14, 40));
extract($info);
extract($header);
if($type != 0x4D42)
return false;
$palette_size = $offset - 54;
$ncolor = $palette_size/4;
$imres=imagecreatetruecolor($width, $height);
imagealphablending($imres, false);
imagesavealpha($imres, true);
$pal=array();
if($palette_size) {
$palette = substr($im, 54, $palette_size);
$gd_palette = "";
$j = 0; $n = 0;
while($j < $palette_size) {
$b = ord($palette{$j++});
$g = ord($palette{$j++});
$r = ord($palette{$j++});
$a = ord($palette{$j++});
if (($r == 255) && ($g == 0) && ($b == 255))
$a = 127; // alpha = 255 on 0xFF00FF
$pal[$n++] = imagecolorallocatealpha($imres, $r, $g, $b, $a);
}
}
$scan_line_size = (($bits * $width) + 7) >> 3;
$scan_line_align = ($scan_line_size & 0x03) ? 4 - ($scan_line_size & 0x03): 0;
for($i = 0, $l = $height - 1; $i < $height; $i++, $l--) {
$scan_line = substr($im, $offset + (($scan_line_size + $scan_line_align) * $l), $scan_line_size);
if($bits == 24) {
$j = 0; $n = 0;
while($j < $scan_line_size) {
$b = ord($scan_line{$j++});
$g = ord($scan_line{$j++});
$r = ord($scan_line{$j++});
$a = 0;
if (($r == 255) && ($g == 0) && ($b == 255))
$a = 127; // alpha = 255 on 0xFF00FF
$col=imagecolorallocatealpha($imres, $r, $g, $b, $a);
imagesetpixel($imres, $n++, $i, $col);
}
}
else if($bits == 8) {
$j = 0;
while($j < $scan_line_size) {
$col = $pal[ord($scan_line{$j++})];
imagesetpixel($imres, $j-1, $i, $col);
}
}
else if($bits == 4) {
$j = 0; $n = 0;
while($j < $scan_line_size) {
$byte = ord($scan_line{$j++});
$p1 = $byte >> 4;
$p2 = $byte & 0x0F;
imagesetpixel($imres, $n++, $i, $pal[$p1]);
imagesetpixel($imres, $n++, $i, $pal[$p2]);
}
}
else if($bits == 1) {
$j = 0; $n = 0;
while($j < $scan_line_size) {
$byte = ord($scan_line{$j++});
$p1 = (int) (($byte & 0x80) != 0);
$p2 = (int) (($byte & 0x40) != 0);
$p3 = (int) (($byte & 0x20) != 0);
$p4 = (int) (($byte & 0x10) != 0);
$p5 = (int) (($byte & 0x08) != 0);
$p6 = (int) (($byte & 0x04) != 0);
$p7 = (int) (($byte & 0x02) != 0);
$p8 = (int) (($byte & 0x01) != 0);
imagesetpixel($imres, $n++, $i, $pal[$p1]);
imagesetpixel($imres, $n++, $i, $pal[$p2]);
imagesetpixel($imres, $n++, $i, $pal[$p3]);
imagesetpixel($imres, $n++, $i, $pal[$p4]);
imagesetpixel($imres, $n++, $i, $pal[$p5]);
imagesetpixel($imres, $n++, $i, $pal[$p6]);
imagesetpixel($imres, $n++, $i, $pal[$p7]);
imagesetpixel($imres, $n++, $i, $pal[$p8]);
}
}
}
return $imres;
}
$data = @gzuncompress(pack('H*', $sdata));
$image = imagecreatefrombmpstring($data);
我找到http://code.google.com/p/fluxcp/source/browse/branches/fluxcp-1.0/modules/guild/emblem.php?r=696
你能幫助我這個代碼。
EDIT ::
溶液
from binascii import unhexlify
import zlib
import Image
from cStringIO import StringIO
data = StringIO(zlib.decompress(unhexlify(sdata)))
i = Image.open(data)
i.show()
您的數據是否被壓縮? – 2013-02-11 14:01:17
我不知道,因爲我使用的數據庫,我沒有做。我試圖找到一種方式來顯示圖像。但是,如果我們查看php代碼,我們會看到「gzuncompress」,所以我認爲數據壓縮zlib。 – Krozark 2013-02-11 14:03:34
14個字節的信息和40個字節的標題指向BMP格式。 – 2013-02-11 14:17:28