How to crop an image to the center when uploading the same

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9

In the project here I want to display the images in a square-sized dynamic div where its maximum size is 240 x 240.

Assuming a user uploads an image with a rectangular dimension (eg 500 x 280), that same div becomes "disfigured" since its height is auto, so the height is proportional to width. And my goal is to leave all the div with square format.

So I need to ensure that all the images that will be displayed have square dimensions, that is, 200x200, 300x300, or any other size as long as it is square.

In my view an easy way to do this is by cropping the image at the time of upload. And preferably the cutout has to be in the center of the image. EX:

As you can see, the image has been cut to the center, and now it has the same Height and Width.

    
asked by anonymous 31.08.2014 / 03:42

3 answers

6

Good luck, the question was how to crop an image to the center when uploading it. I searched the internet and ended up changing my mind and using JCROP, but the question itself was unanswered, so I looked it up on the internet and found a script that solved my question. The script is not mine, but I did a little minor editing to better adapt to my initial goal.

Here's the script: 

  <form action="" method="post" enctype="multipart/form-data">
  <input name="img" type="file" />
  <input type="submit" name="cadastrar" />
  </form>


  <?php
  if(isset($_POST['cadastrar'])){ 
  $img  = $_FILES['img'];
  $name =$img['name'];
  $tmp  =$img['tmp_name'];
  $ext  =end(explode('.',$name));

  $pasta        ='NOMEDAPASTA/'; //Pasta onde a imagem será salva

  $permiti  =array('jpg', 'jpeg', 'png');
  $name = uniqid().'.'.$ext; $uid = uniqid();

  $upload   = move_uploaded_file($tmp, $pasta.'/'.$name);}; //Faz o upload da imagem para o servidor

  if($upload){
  function resize_crop_image($max_width, $max_height, $source_file, $dst_dir, $quality = 60){
  $imgsize = getimagesize($source_file);
  $width = $imgsize[0];
  $height = $imgsize[1];
  $mime = $imgsize['mime'];
  //resize and crop image by center
  switch($mime){
  case 'image/gif':
  $image_create = "imagecreatefromgif";
  $image = "imagegif";
  break;
  //resize and crop image by center
  case 'image/png':
  $image_create = "imagecreatefrompng";
  $image = "imagepng";
  $quality = 6;
  break;
  //resize and crop image by center
  case 'image/jpeg':
  $image_create = "imagecreatefromjpeg";
  $image = "imagejpeg";
  $quality = 60;
  break;
  default:
  return false;
  break;
  }
  $dst_img = imagecreatetruecolor($max_width, $max_height);
  $src_img = $image_create($source_file);
  $width_new = $height * $max_width / $max_height;
  $height_new = $width * $max_height / $max_width;
  if($width_new > $width){
  $h_point = (($height - $height_new) / 2);
  imagecopyresampled($dst_img, $src_img, 0, 0, 0, $h_point, $max_width, $max_height, $width, $height_new);
  }else{
  $w_point = (($width - $width_new) / 2);
  imagecopyresampled($dst_img, $src_img, 0, 0, $w_point, 0, $max_width, $max_height, $width_new, $height);
  }
  $image($dst_img, $dst_dir, $quality);
  if($dst_img)imagedestroy($dst_img);
  if($src_img)imagedestroy($src_img);
  }

  //Tamanho da Imagem final
  resize_crop_image(300, 300, $pasta.'/'.$name, $pasta.'/'.$name);}


  ?>
    
01.09.2014 / 04:11
8

Download the JCrop package and make two pages like this:

Homepage: (crop.php) 

<!DOCTYPE HTML>
<html>
<head>
<meta charset="utf-8">
<title>Arquivo</title>
<link rel="stylesheet" href="css/jquery.Jcrop.css" type="text/css" />
<script src="//cdnjs.cloudflare.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<script src="//cdnjs.cloudflare.com/ajax/libs/jquery-jcrop/0.9.12/js/jquery.Jcrop.min.js"></script>
<script language="Javascript"> 
    $(function(){ 
        $('#ImagemCrop').Jcrop({
            aspectRatio: 1,
            onSelect: UpdateCrop,
            setSelect: [0, 0, 200, 200],
        });

    }); 
    function UpdateCrop(c)
    {
        $('#x').val(c.x);
        $('#y').val(c.y);
        $('#w').val(c.w);
        $('#h').val(c.h);
        $("#altura").html("Altura:" + c.h);
        $("#largura").html("Largura:" + c.w);
    };  
</script>
</head>
<body>
    <div id="altura">Altura:</div>
    <div id="largura">Largura:</div>
    <form action="recorte.php" method="post">
        <input type="hidden" id="x" name="x" />
        <input type="hidden" id="y" name="y" />
        <input type="hidden" id="w" name="w" />
        <input type="hidden" id="h" name="h" />
        <input type="hidden" id="imagem" name="imagem" value="img/1.jpg" />
        <input type="submit" value="Recortar Imagem" />
    </form>
    <img src="img/1.jpg" id="ImagemCrop" />
</body>
</html>

Pagethatreceivesthedatafortheclipping:(clipping.php)

<?php if (isset($_POST['imagem']) && isset($_POST['x']) && isset($_POST['y']) && isset($_POST['w']) && isset($_POST['h'])) { $targ_w = $_POST['w']; $targ_h = $_POST['h']; $jpeg_quality = 90; $src = $_POST['imagem']; $img_r = imagecreatefromjpeg($src); $dst_r = ImageCreateTrueColor( $targ_w, $targ_h ); imagecopyresampled($dst_r,$img_r,0,0,$_POST['x'],$_POST['y'], $targ_w,$targ_h,$_POST['w'],$_POST['h']); header('Content-type: image/jpeg'); imagejpeg($dst_r,null,$jpeg_quality); } else { echo 'error'; }

    
31.08.2014 / 16:36
5

You can do this by cutting into the server's sludge, I use imagine has a very interesting OO approach to image manipulation.

Installation

Add the following dependency in your composer.json file: 

"require": {
    "imagine/imagine": "dev-master"
},

Example of use 

require_once './vendor/autoload.php';

$imagine = new Imagine\Gd\Imagine();

$size = new Imagine\Image\Box(200, 200);

$mode = Imagine\Image\ImageInterface::THUMBNAIL_OUTBOUND;

$imagine->open($_FILES['file']['tmp_name'])
        ->thumbnail($size, $mode)
        ->save(__DIR__ . '/upload/' . $_FILES['file']['name'])
;
    
01.09.2014 / 14:24
Is it really necessary to create a 3rd auxiliary table in N-N relationships? What's the difference between Simple Factory, Factory Method, Abstract Factory?