Hi all,
Currently I have a range of images some portrait in size and some landscape, what I want to do is batch resize these images so they all fit the fixed dimensions of 180px x 120px
I understand that you can add .jsx files into the scripts folder of photoshop but right now I can only find scripts that resize the image based on 1 side which isnt that helpful.
Does anyone know were I could find examples of the code I need or can anyone offer me some advice?
Thanks
Kyle
Thanks Kalon, Il def give this code a go!
You have your query in the javascript thread and so I am not sure what type of script you want because afaik javascript cannot output files to a disk.
If it’s any help to you, this php script will resize images to fit within whatever max_width and max_heoght you specify and maintain the original image’s aspect ration.
<?php
/*************************************************************************
This script resizes an image so that it fits within a user specified
max_width and max_height.
Input Parameters:
-----------------
$image = path to image to be resized.
maxWidth = maximum width.
maxHeight = maximum height.
*************************************************************************/
$image = 'pic1.jpg';
$outFile = 'pic1_resized.jpg';
$max_width = 100;
$max_height = 150;
//get the original image attributes
$size = GetImageSize($image);
$width = $size[0];
$height = $size[1];
$imageType = $size[2];
//scaling factors
$xRatio = $max_width / $width;
$yRatio = $max_height / $height;
//calculate the new width and height
if($width <= $max_width && $height <= $max_height) //image does not need resizing
{
$toWidth = $width;
$toHeight = $height;
}
else if($xRatio * $height < $max_height)
{
$toHeight = round($xRatio * $height);
$toWidth = $max_width;
}
else
{
$toWidth = round($yRatio * $width);
$toHeight = $max_height;
}
//create the resized image
//Type of image 1=GIF 2=JPG 3=PNG 4=SWF 5=PSD 6=BMP 7=TIFF(intel byte order) 8=TIFF(motorola byte order) 9=JPC 10=JP2 11=JPX 12=JB2 13=SWC 14=IFF 15=WBMP 16=XBM
$newImage = ImageCreateTrueColor($toWidth,$toHeight); //create the new image canvas
switch ($imageType)
{
case 1: //gif file
$oldImage = ImageCreateFromGif($image);
break;
case 3: //png file
$oldImage = ImageCreateFromPng($image);
break;
default: //jpg file
$oldImage = ImageCreateFromJpeg($image);
break;
}
ImageCopyResampled($newImage,$oldImage,0,0,0,0,$toWidth,$toHeight,$width,$height); //resize the new image
//output the new resized image
switch ($imageType)
{
case 1: //gif file
header('Content-type: image/gif');
ImageGif($newImage,$outFile);
break;
case 3: //png file
header('Content-type: image/png');
ImagePng($newImage,$outFile);
break;
default: //jpg file
header('Content-type: image/jpeg');
ImageJpeg($newImage,$outFile);
break;
}
//clean up resources
ImageDestroy($oldImage);
ImageDestroy($newImage);
echo' Done...!!!';
?>
if you need anymore help, just post back 
To batch process multiple images I would put the code in a class file. I haven’t included any error checking code in this demo.
The class you would normally be put in a separate file and then include() it in your script.
The class needs 4 inputs for the consructor:
1 - folder containing the original images
2 - folder to output the resized images
3 - max width
4 - max height
The folder names must end with a /
<?php
class Image_Batch_Processor {
private $srcDir;
private $outDir;
private $maxWidth;
private $maxHeight;
/* -----------------------------------------------------------
* Class Constructor
----------------------------------------------------------- */
public function __construct($srcDir, $outDir, $maxWidth, $maxHeight) {
$this->srcDir = $srcDir;
$this->outDir = $outDir;
$this->maxWidth = $maxWidth;
$this->maxHeight = $maxHeight;
}
/* -----------------------------------------------------------
* Accessors
----------------------------------------------------------- */
public function setSrcDir($srcDir) {
$this->srcDir = $srcDir;
}
public function setOutDir($outDir) {
$this->outDir = $outDir;
}
public function setMaxWidth($maxWidth) {
$this->maxWidth = $maxWidth;
}
public function setMaxheight($maxHeight) {
$this->maxHeight = $maxHeight;
}
public function getSrcDir($srcDir) {
return $this->srcDir;
}
public function getOutDir($outDir) {
return $this->outDir;
}
public function getMaxWidth($maxWidth) {
return $this->maxWidth;
}
public function getMaxheight($maxHeight) {
return $this->maxHeight;
}
/* -----------------------------------------------------------
Class Methods
----------------------------------------------------------- */
public function resize($imgsArr) {
foreach($imgsArr as $file) {
$image = $this->srcDir.$file;
$outFile = $this->outDir.$file;
//get the original image attributes
$size = GetImageSize($image);
$width = $size[0];
$height = $size[1];
$imageType = $size[2];
//scaling factors
$xRatio = $this->maxWidth / $width;
$yRatio = $this->maxHeight / $height;
//calculate the new width and height
if($width <= $this->maxWidth && $height <= $this->maxHeight) {//image does not need resizing
$toWidth = $width;
$toHeight = $height;
} else if($xRatio * $height < $this->maxHeight) {
$toHeight = round($xRatio * $height);
$toWidth = $this->maxWidth;
} else {
$toWidth = round($yRatio * $width);
$toHeight = $this->maxHeight;
}
//create the resized image
//Type of image 1=GIF 2=JPG 3=PNG 4=SWF 5=PSD 6=BMP 7=TIFF(intel byte order) 8=TIFF(motorola byte order) 9=JPC 10=JP2 11=JPX 12=JB2 13=SWC 14=IFF 15=WBMP 16=XBM
$newImage = ImageCreateTrueColor($toWidth,$toHeight); //create the new image canvas
switch ($imageType) {
case 1: //gif file
$oldImage = ImageCreateFromGif($image);
break;
case 3: //png file
$oldImage = ImageCreateFromPng($image);
break;
default: //jpg file
$oldImage = ImageCreateFromJpeg($image);
break;
}
ImageCopyResampled($newImage,$oldImage,0,0,0,0,$toWidth,$toHeight,$width,$height); //resize the new image
//output the new resized image
switch ($imageType) {
case 1: //gif file
header('Content-type: image/gif');
ImageGif($newImage,$outFile);
break;
case 3: //png file
header('Content-type: image/png');
ImagePng($newImage,$outFile);
break;
default: //jpg file
header('Content-type: image/jpeg');
ImageJpeg($newImage,$outFile);
break;
}
//clean up resources
ImageDestroy($oldImage);
ImageDestroy($newImage);
}
}
} //end of class
//----------------------------------------------------------
//testing code
//you can hard code the files names or get them using scandir().
$imgA = array('pic1.jpg','pic2.jpg','pic3.jpg');
$batch_processor = new Image_Batch_Processor('./','./temp/',100,100);
$batch_processor->resize($imgA);
echo 'done';
?>
Hi Kalon,
Thanks for this, can I ask how you use this for multiple images?
Kyle