how to crop an image?

[lukelee]

If i upload an 300X400 image to replace the old image which is 300X300 on my website through cms, the image will be stretched, does anyone know how to make a crop image function? or is there any tutorial?thanks

[Mr_J]

I use 1 of 2, GIMP image software @ www.gimp.org/downloads or google it: http://www.google.co.za/search?hl=en&q=gimp+download&btnG=Google+Search&meta=

or

Sometimes I just use:

<img src="images/image.jpg" width="300px" height="300px">

 

[john-formby]

Hi lukelee,

 

Have a look at this function: http://www.findmotive.com/2006/12/13/php-crop-image/

 

John

[Mr_J]

Hi lukelee,

 

Have a look at this function: http://www.findmotive.com/2006/12/13/php-crop-image/

 

John

Looking at the amount of code, I would rather use Image manipulation software... Very interesting though

 

[john-formby]

Looking at the amount of code, I would rather use Image manipulation software... Very interesting though

 

Image manipulation software is useful and you can crop exactly what you want.  The problem is if you are getting uploads from users, how many of them are going to resize to what you require?

[lukelee]

Looking at the amount of code, I would rather use Image manipulation software... Very interesting though

 

Image manipulation software is useful and you can crop exactly what you want.  The problem is if you are getting uploads from users, how many of them are going to resize to what you require?

yeah，I need that function in my cms, thats for other ppl use. I have tryed the codes, but it doesnt work for me.

 

<?php
      cropImage(225, 165, 'mypicture.jpg', 'jpg', 'mypictures.jpg');


      function cropImage($nw, $nh, $source, $stype, $dest) {

       

          $size = getimagesize($source);

          $w = $size[0];

          $h = $size[1];

       

          switch($stype) {

              case 'gif':

              $simg = imagecreatefromgif($source);

              break;

              case 'jpg':

              $simg = imagecreatefromjpeg($source);

              break;
  16.
              case 'png':

              $simg = imagecreatefrompng($source);

    break;

          }

       

          $dimg = imagecreatetruecolor($nw, $nh);

       
$wm = $w/$nw;

          $hm = $h/$nh;

       

          $h_height = $nh/2;

          $w_height = $nw/2;

       

          if($w> $h) {

       

              $adjusted_width = $w / $hm;

              $half_width = $adjusted_width / 2;

              $int_width = $half_width - $w_height;

       

              imagecopyresampled($dimg,$simg,-$int_width,0,0,0,$adjusted_width,$nh,$w,$h);

       

          } elseif(($w <$h) || ($w == $h)) {

       

              $adjusted_height = $h / $wm;

              $half_height = $adjusted_height / 2;

              $int_height = $half_height - $h_height;

       

imagecopyresampled($dimg,$simg,0,-$int_height,0,0,$nw,$adjusted_height,$w,$h);
       

} else {

    imagecopyresampled($dimg,$simg,0,0,0,0,$nw,$nh,$w,$h);

}

       

imagejpeg($dimg,$dest,100);

}
?>

[lukelee]

All i need is just convert any big size image to 150X150, and fill white color into the blank space

[jcombs_31]

Looking at the amount of code, I would rather use Image manipulation software... Very interesting though

 

Image manipulation software is useful and you can crop exactly what you want.  The problem is if you are getting uploads from users, how many of them are going to resize to what you require?

yeah，I need that function in my cms, thats for other ppl use. I have tryed the codes, but it doesnt work for me.

 

<?php
      cropImage(225, 165, 'mypicture.jpg', 'jpg', 'mypictures.jpg');


      function cropImage($nw, $nh, $source, $stype, $dest) {

       

          $size = getimagesize($source);

          $w = $size[0];

          $h = $size[1];

       

          switch($stype) {

              case 'gif':

              $simg = imagecreatefromgif($source);

              break;

              case 'jpg':

              $simg = imagecreatefromjpeg($source);

              break;
  16.
              case 'png':

              $simg = imagecreatefrompng($source);

    break;

          }

       

          $dimg = imagecreatetruecolor($nw, $nh);

       
$wm = $w/$nw;

          $hm = $h/$nh;

       

          $h_height = $nh/2;

          $w_height = $nw/2;

       

          if($w> $h) {

       

              $adjusted_width = $w / $hm;

              $half_width = $adjusted_width / 2;

              $int_width = $half_width - $w_height;

       

              imagecopyresampled($dimg,$simg,-$int_width,0,0,0,$adjusted_width,$nh,$w,$h);

       

          } elseif(($w <$h) || ($w == $h)) {

       

              $adjusted_height = $h / $wm;

              $half_height = $adjusted_height / 2;

              $int_height = $half_height - $h_height;

       

imagecopyresampled($dimg,$simg,0,-$int_height,0,0,$nw,$adjusted_height,$w,$h);
       

} else {

    imagecopyresampled($dimg,$simg,0,0,0,0,$nw,$nh,$w,$h);

}

       

imagejpeg($dimg,$dest,100);

}
?>

 

First, you need to change the size in the function call, and second make sure that you're path to the image is correct.

[lukelee]

finally, I have found a code which is working for me, but some of them I dont unstand, it gives a new name for thumbnail image in function dst_img() which is within resizeimg class. how can i display it on the screen after echo $image1; ?here is the code:

 

<?php

class resizeimage
{
        var $type;
        var $width;
        var $height;
        var $resize_width;
        var $resize_height;
        var $cut;
        var $srcimg;
        var $dstimg;
        var $im;

        function resizeimage($img, $wid, $hei,$c)
        {
                $this->srcimg = $img;
                $this->resize_width = $wid;
                $this->resize_height = $hei;
                $this->cut = $c;

                $this->type = substr(strrchr($this->srcimg,"."),1);

                $this->initi_img();
    
                $this -> dst_img();

                $this->width = imagesx($this->im);
                $this->height = imagesy($this->im);
        
                $this->newimg();
                ImageDestroy ($this->im);
        }
        function newimg()
        {

              
                $resize_ratio = ($this->resize_width)/($this->resize_height);

                $ratio = ($this->width)/($this->height);

                {
                        if($ratio>=$resize_ratio)

                        {

                                $newimg = imagecreatetruecolor($this->resize_width,$this->resize_height);

                                imagecopyresampled($newimg, $this->im, 0, 0, 0, 0, $this->resize_width,$this->resize_height, (($this->height)*$resize_ratio), $this->height);


                                ImageJpeg ($newimg,$this->dstimg);
                                echo "thumbnail created";
                        
                        }
                        if($ratio<$resize_ratio)

                        {
                                $newimg = imagecreatetruecolor($this->resize_width,$this->resize_height);
                                imagecopyresampled($newimg, $this->im, 0, 0, 0, 0, $this->resize_width, $this->resize_height, $this->width, (($this->width)/$resize_ratio));


                                ImageJpeg ($newimg,$this->dstimg);
                                echo "thumbnail created";
                        
                        }

                }
                else
                {
                        if($ratio>=$resize_ratio)
                        {
                                $newimg = imagecreatetruecolor($this->resize_width,($this->resize_width)/$ratio);
                                imagecopyresampled($newimg, $this->im, 0, 0, 0, 0, $this->resize_width, ($this->resize_width)/$ratio, $this->width, $this->height);



                                ImageJpeg ($newimg,$this->dstimg);
                                echo "thumbnail created";
                        
                        }
                        if($ratio<$resize_ratio)
                        {
                                $newimg = imagecreatetruecolor(($this->resize_height)*$ratio,$this->resize_height);
                                imagecopyresampled($newimg, $this->im, 0, 0, 0, 0, ($this->resize_height)*$ratio, $this->resize_height, $this->width, $this->height);



                                ImageJpeg ($newimg,$this->dstimg);
                                echo "thumbnail created";
                        
                        }
                }

         }

       
        function initi_img()
        {
                if($this->type=="jpg")
                {
                        $this->im = imagecreatefromjpeg($this->srcimg);
                }
                if($this->type=="gif")
                {
                        $this->im = imagecreatefromgif($this->srcimg);
                }
                if($this->type=="png")
                {
                        $this->im = imagecreatefrompng($this->srcimg);
                }
        }
        
        function dst_img()
        {
                $full_length  = strlen($this->srcimg);
                $type_length  = strlen($this->type);
                $name_length  = $full_length-$type_length;
                $name         = substr($this->srcimg,0,$name_length-1);
                $this->dstimg = $name."_small.".$this->type;
            
        }
}

$tempimgname = strtolower($_FILES["file"][name]);

$tempimgname = mb_convert_encoding(   $tempimgname,   "gb2312",   "utf-8");

$tmpfiletype = substr(strrchr($tempimgname,"."),1);


if($tmpfiletype=="jpg" || $tmpfiletype=="gif" || $tmpfiletype=="png")
{
        if(copy($_FILES["file"]["tmp_name"],strtolower("image/".date("Y-m-d-h-m-s",time()).$tempimgname)))
        {
          $image1 = basename(strtolower("image/".date("Y-m-d-h-m-s",time()).$tempimgname));
         $class = new resizeimage("image/".date("Y-m-d-h-m-s",time()).$tempimgname, 150, 150, 1);

            echo "file".strtolower($_FILES["file"]["name"])."<br>"."大小".$_FILES ["file"]["size"]."<br>"."type is".$_FILES["file"]["type"]."< br>"."success"."<br>";
         
         echo $image1;
        }
        else
        {
            echo "failed"."<br>";
        }
    
}
else
{
    echo "wrong image type;
}

?>