Resizing Images

FlashAges

How would I resize an image to 10 x 10 using PHP?

scbmx

this is what i use, also you must have the gd library installed.

also, leave the stuff at the top, cuz its not my script


<?
//resize.txt -> source
################################################
# shiegege resize and save v.1
# [email]shiegege@yahoo.com[/email]
################################################
# ONLINE SAMPLE PREVIEW :
# [url]http://kentung.f2o.org/scripts/thumbnail/resize.php[/url]
################################################
# readme:
# + Need GD_Library on your server
# + If your GD not support 'ImageCreateTrueColor' function,
#   change one line from 'ImageCreateTrueColor' to 'ImageCreate' 
# + Jpeg file format Only
#   Other file format, just modify the scripts
#   ex:
#   to create PNG file format:
#   change this lines:
#   - imagejpeg =WITH=> imagepng
#   - Header("Content-Type: image/jpeg") =WITH=>
#     Header("Content-Type: image/png")
#   - ImageCreateFromjpeg =WITH=> ImageCreateFrompng
################################################
# Please Edit
################################################

## CONFIG ##

picture_location=./your/pic/here.jpg;
picture_save=./where/to/save/thumbnail.jpg;
size=75;  // size in pixel u want the picture to come out

## /CONFIG ##

$img_des=resize_img($picture_location,$size);

# to display thumbnail, type this :
#    imagejpeg($img_des);
# OR
# use this to save picture :
#     imagejpeg($img_des,$picture_save);
# OR
# U can show thumbnail and
# save thumbnail to a file together :
#     imagejpeg($img_des);
#     imagejpeg($img_des,$picture_save);

imagejpeg($img_des); // only thumbnail picture
imagejpeg($img_des,$picture_save);

##########################################
##### Stop Edit ##########################
##########################################
function resize_img($imgname,$size)
{
Header("Content-Type: image/jpeg");
 $img_src = ImageCreateFromjpeg ($imgname);

 $true_width = imagesx($img_src);
 $true_height = imagesy($img_src);

 if ($true_width>=$true_height)
 {
    $width=$size;
    $height = ($width/$true_width)*$true_height;
 }
  else
 {
    $height=$size;
    $width = ($height/$true_height)*$true_width;
 }
 $img_des = ImageCreate($width,$height);
     imagecopyresized ($img_des, $img_src, 0, 0, 0, 0, $width, $height, $true_width, $true_height);
      return $img_des;
}
?>

FlashAges

Thanks.

apepelis

all you need is GD?
not image magik?
I'll be so happy if this works!!!

DigitalExpl0it

this works also with GD

function thumbnail($image_path,$thumb_path,$image_name,$thumb_width) 
{ 
    $src_img = imagecreatefromjpeg("$image_path/$image_name"); 
    $origw=imagesx($src_img); 
    $origh=imagesy($src_img); 
    $new_w = $thumb_width; 
    $diff=$origw/$new_w; 
    $new_h=$new_w; 
    $dst_img = imagecreate($new_w,$new_h); 
    imagecopyresized($dst_img,$src_img,0,0,0,0,$new_w,$new_h,imagesx($src_img),imagesy($src_img)); 

imagejpeg($dst_img, "$thumb_path"); 
return true; 
} 

thumbnail("/usr/images","/usr/images/thumb","foo.jpg","10");

clonemaster

This came from PHP and MySQL Web Development by Luke Welling and Laura Thomson

<?php

if (!$max_width)
  $max_width = 10;
if (!$max_height)
  $max_height = 10;

$size = GetImageSize($image);
$width = $size[0];
$height = $size[1];

$x_ratio = $max_width / $width;
$y_ratio = $max_height / $height;

if ( ($width <= $max_width) && ($height <= $max_height) ) {
  $tn_width = $width;
  $tn_height = $height;
}
else if (($x_ratio * $height) < $max_height) {
  $tn_height = ceil($x_ratio * $height);
  $tn_width = $max_width;
}
else {
  $tn_width = ceil($y_ratio * $width);
  $tn_height = $max_height;
}

$src = ImageCreateFromPng($image);
$dst = ImageCreate($tn_width,$tn_height);
ImageCopyResized($dst, $src, 0, 0, 0, 0,
    $tn_width,$tn_height,$width,$height);
header("Content-type: image/Png");
ImagePng($dst, null, -1);
ImageDestroy($src);
ImageDestroy($dst);

?>

apepelis

er... um.. that didn't work...
original image:

reprocessed image:

any way to get the colors better?

apepelis

that is the picture done with imagecopyresampled

apepelis

work that into a function and you are good to go.
took like 1/2 to get iut right.
all the other examples don't use true color.
the images come out crappy.

$picture_location = "./picture.jpg";
$picture_save = "./picturethumb2.jpg";
$size=78; // size in pixel u want the picture to come out

$im_size = GetImageSize ( $picture_location);
$imageWidth = $im_size[0];
$imageHeight = $im_size[1];

// - or with GD 2+ -

// do all your color allocations here
//$font_color_black = ImageColorAllocate( $im, 0,0,0);

$im2 = ImageCreateFromJPEG($picture_location);

if ($imageWidth>=$imageHeight)
{
$width=$size;
$height = ($width/$imageWidth)$imageHeight;
}
else
{
$height=$size;
$width = ($height/$imageHeight)$imageWidth;
}
$im = imageCreateTrueColor( $width, $height );

ImageCopyResized ($im,$im2, 0, 0, 0, 0, $width, $height, $imageWidth, $imageHeight);
Header("Content-type: image/jpeg");
Imagejpeg($im,'',100); //to print to screen
Imagejpeg($im,$picture_save,100);
ImageDestroy($im);
ImageDestroy ($im2);

apepelis

sorry for beating a dead horse...
but I made a nice method out of this....

the edit was to fix the method... oops.
enjoy

sks1024

Try this:

$size = GetImageSize("/path/to/image/image_name.jpg");

//Make these porportions the same or the image will de distorted
$sizeh=$size[1]/3; //Make this whatever in this case 1/3 of original height 
$sizew=$size[0]/3; //Make this whatever in this case 1/3 of original width


print"<img src=/path/to/image/image_name.jpg height=$sizeh width=$sizew border=1>";

RGBlackmore

use imagemagick, it's more easy:

passthru("convert -geometry 640x480! $file $file");

$file is the temporal uploaded file.

640x480! -> static image, not conserving the ratio
640x480 --> conserv the ratio of the image... the output image can be less than this size

Also see montage

Angus

Originally posted by RGBlackmore
use imagemagick, it's more easy:

passthru("convert -geometry 640x480! $file $file");

$file is the temporal uploaded file.

640x480! -> static image, not conserving the ratio
640x480 --> conserv the ratio of the image... the output image can be less than this size

Also see montage

Is there a way to run convert (im in telnet) that does all files at once? I cant work out how to do a whole dir at once... eg

convert -geometry 640x480 . newdir/

apepelis

to sks1024: a 3MB 6 megapixel picture is still a 3MB 6MP picture when no matter what you tell an image the height size is... I'm hoping you are just jokeing there.... Someone uploaded a 200KB+ CD cover to my site and within one day, the transfers on that slowed my whole side down (cd covers and show on the main page) and the end-of-the-day transfers on that one file where a few 100 MB.

On the Imagemagik comment:
My server does not have and will not add image magik so this is the only way to do it.

enterume

Hi,

Does it mean if i use one of the method above(except the one just change the width and height in the <img) to convert the image file size to smaller, it will reduce output file size?😕

Devil_Dude

yes

thread_PHP

what changes should be made to create gd library or imagemagick to install in php.ini. Please anybody help me how to configure php.ini or httpd.conf in windows2003 php4.3.2 and apache 2.0 ,Mysql 4x

thread_PHP

extension=php_gd2.dll

I have known it.