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;