智能门禁刷脸照片格式gif、bmp，png转换，转换base64
随着刷脸闸机的普及，很多场所都使用了刷脸金闸机，很多时候对方传来的照片格式不对。
刷脸闸机对应的格式都是jpg
照片来源：访客手机上传，管理员上传，团队购票上传
在转换的语言很多，在网站中php使用较为广泛
一png转jpg
$图片格式png_数据 = imagecreatefrompng($facecache_fullpath);
$转换后保存路径 = str_replace('_ori.bmp', '_new_png.jpg', $facecache_fullpath);
$res = imagejpeg($图片格式png_数据, $转换后保存路径);二 gif 转换jpg
$图片格式png_数据 = imagecreatefromgif($facecache_fullpath);
$dstFile = str_replace('_ori.bmp', '_new_gif.jpg', $facecache_fullpath);
$res = imagejpeg($图片格式png_数据, $dstFile);
imagedestroy($dstFile);三、bmp转换jpg
$dstFile = str_replace('_ori.bmp', '_new_bmp.jpg', $facecache_fullpath);
changeBMPtoJPGV2024($facecache_fullpath, $dstFile);
function changeBMPtoJPGV2024($srcPathName,$dstFile ){
$srcFile=$srcPathName;
// $dstFile = str_replace('_ori.bmp', '_new.jpg', $srcPathName);
$photoSize = GetImageSize($srcFile);
$pw = $photoSize[0];
$ph = $photoSize[1];
$dstImage = ImageCreateTrueColor($pw, $ph);
$white = imagecolorallocate($dstImage, 255, 255, 255);
//用 $white 颜色填充图像
imagefill( $dstImage, 0, 0, $white);
//读取图片
$srcImage = ImageCreateFromBMP_private($srcFile);
//合拼图片
imagecopyresampled($dstImage, $srcImage, 0, 0, 0, 0, $pw, $ph, $pw, $ph);
$judge = imagejpeg($dstImage, $dstFile, 90);
imagedestroy($dstImage);
if($judge){
return $dstFile;
}else{
return false;
}
}
function ImageCreateFromBMP_private($filename) {
if (!$f1 = fopen($filename, "rb"))
return false;
$FILE = unpack("vfile_type/Vfile_size/Vreserved/Vbitmap_offset", fread($f1, 14));
if ($FILE['file_type'] != 19778)
return false;
$BMP = unpack('Vheader_size/Vwidth/Vheight/vplanes/vbits_per_pixel' .
'/Vcompression/Vsize_bitmap/Vhoriz_resolution' .
'/Vvert_resolution/Vcolors_used/Vcolors_important', fread($f1, 40));
$BMP['colors'] = pow(2, $BMP['bits_per_pixel']);
if ($BMP['size_bitmap'] == 0)
$BMP['size_bitmap'] = $FILE['file_size'] - $FILE['bitmap_offset'];
$BMP['bytes_per_pixel'] = $BMP['bits_per_pixel'] / 8;
$BMP['bytes_per_pixel2'] = ceil($BMP['bytes_per_pixel']);
$BMP['decal'] = ($BMP['width'] * $BMP['bytes_per_pixel'] / 4);
$BMP['decal'] -= floor($BMP['width'] * $BMP['bytes_per_pixel'] / 4);
$BMP['decal'] = 4 - (4 * $BMP['decal']);
if ($BMP['decal'] == 4)
$BMP['decal'] = 0;
$PALETTE = array();
if ($BMP['colors'] < 16777216) {
$PALETTE = unpack('V' . $BMP['colors'], fread($f1, $BMP['colors'] * 4));
}
$IMG = fread($f1, $BMP['size_bitmap']);
$VIDE = chr(0);
$res = imagecreatetruecolor($BMP['width'], $BMP['height']);
$P = 0;
$Y = $BMP['height'] - 1;
while ($Y >= 0) {
$X = 0;
while ($X < $BMP['width']) {
switch ($BMP['bits_per_pixel']) {
case 32:
$COLOR = unpack("V", substr($IMG, $P, 3) . $VIDE);
break;
case 24:
$COLOR = unpack("V", substr($IMG, $P, 3) . $VIDE);
break;
case 16:
$COLOR = unpack("n", substr($IMG, $P, 2));
$COLOR[1] = $PALETTE[$COLOR[1] + 1];
break;
case 8:
$COLOR = unpack("n", $VIDE . substr($IMG, $P, 1));
$COLOR[1] = $PALETTE[$COLOR[1] + 1];
break;
case 4:
$COLOR = unpack("n", $VIDE . substr($IMG, floor($P), 1));
if (($P * 2) % 2 == 0)
$COLOR[1] = ($COLOR[1] >> 4);
else
$COLOR[1] = ($COLOR[1] & 0x0F);
$COLOR[1] = $PALETTE[$COLOR[1] + 1];
break;
case 1:
$COLOR = unpack("n", $VIDE . substr($IMG, floor($P), 1));
if (($P * 8) % 8 == 0)
$COLOR[1] = $COLOR[1] >> 7;
elseif (($P * 8) % 8 == 1)
$COLOR[1] = ($COLOR[1] & 0x40) >> 6;
elseif (($P * 8) % 8 == 2)
$COLOR[1] = ($COLOR[1] & 0x20) >> 5;
elseif (($P * 8) % 8 == 3)
$COLOR[1] = ($COLOR[1] & 0x10) >> 4;
elseif (($P * 8) % 8 == 4)
$COLOR[1] = ($COLOR[1] & 0x8) >> 3;
elseif (($P * 8) % 8 == 5)
$COLOR[1] = ($COLOR[1] & 0x4) >> 2;
elseif (($P * 8) % 8 == 6)
$COLOR[1] = ($COLOR[1] & 0x2) >> 1;
elseif (($P * 8) % 8 == 7)
$COLOR[1] = ($COLOR[1] & 0x1);
$COLOR[1] = $PALETTE[$COLOR[1] + 1];
break;
default:
return false;
break;
}
imagesetpixel($res, $X, $Y, $COLOR[1]);
$X++;
$P += $BMP['bytes_per_pixel'];
}
$Y--;
$P+=$BMP['decal'];
}
fclose($f1);
return $res;
}自动判断图片格式
在我们不确定客户上传格式时候仅仅靠文件后缀名判断是不够的，这时候我们需要自动判断
function cyberwin_getImgFile_Type($facecache_fullpath){
//image/png image/bmp image/jpeg
$imginfo= getimagesize($facecache_fullpath);
$图片类型 = end($imginfo);
if($图片类型 == "image/png"){
return "png";
}
if($图片类型 == "image/bmp"){
return "bmp";
}
if($图片类型 == "image/jpeg"){
return "jpg";
}
if($图片类型 == "image/gif"){
return "gif";
}
return $图片类型;
// return end($imginfo);
}实现自动识别自动转换
$图片类型 = cyberwin_getImgFile_Type($facecache_fullpath);
$目标最终地址= $facecache_fullpath;
if($图片类型 == "jpg"){
}
if($图片类型 == "png"){
$图片格式png_数据 = imagecreatefrompng($facecache_fullpath);
$dstFile = str_replace('_ori.bmp', '_new_png.jpg', $facecache_fullpath);
$res = imagejpeg($图片格式png_数据, $dstFile);
$目标最终地址= $dstFile;
}
if($图片类型 == "bmp"){
echo "bmp格式";
$dstFile = str_replace('_ori.bmp', '_new_bmp.jpg', $facecache_fullpath);
changeBMPtoJPGV2024($facecache_fullpath, $dstFile);
$目标最终地址= $dstFile;
}
if($图片类型 == "gif"){
$图片格式png_数据 = imagecreatefromgif($facecache_fullpath);
$dstFile = str_replace('_ori.bmp', '_new_gif.jpg', $facecache_fullpath);
$res = imagejpeg($图片格式png_数据, $dstFile);
imagedestroy($dstFile);
$目标最终地址= $dstFile;
}
将图片转换为base64，用于推送到刷脸设备
$content互联网 = file_get_contents($目标最终地址);
$file_content = chunk_split(base64_encode($content互联网)); // base64编码
$img_base64 = 'data:image/' . $img_type . ';base64,' . $file_content;//合成图片的base64编码
echo $img_base64;