[PHP] Image Resize with LibGD
Good morning, I am using imagecreatetruecolor() and imagecopyresampled() to resize oversized images and am overlaying them with an transparent PNG to add a watermark. That works just well for oversized images. Now, let's say I have a small image and would like to stretch it by 50 to 100% of its original size... I know there will be a loss of quality. But maybe someone out there has had to deal with the same before and knows the best way to do that? Any suggestion would be very much appreciated :o) Greetings from germany, Chris -- Chriatian Haensel Fulltime WebSlave http://www.chftp.com -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] Image Resize with LibGD
On 5/8/07, Christian Haensel [EMAIL PROTECTED] wrote: Now, let's say I have a small image and would like to stretch it by 50 to 100% of its original size... I know there will be a loss of quality. But maybe someone out there has had to deal with the same before and knows the best way to do that? Create a new image resource with imagecreatetruecolor(); then copy your source image into it using imagecopyresampled(), adjusting your size to whatever you need. -- Greg Donald http://destiney.com/ -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] Image Resize with LibGD
On Tue, May 8, 2007 3:17 am, Christian Haensel wrote: I am using imagecreatetruecolor() and imagecopyresampled() to resize oversized images and am overlaying them with an transparent PNG to add a watermark. That works just well for oversized images. Now, let's say I have a small image and would like to stretch it by 50 to 100% of its original size... I know there will be a loss of quality. But maybe someone out there has had to deal with the same before and knows the best way to do that? I suspect you'll never be totally happy with the result of stretching an image... You're basically attempting to re-construct lost pixel data that simply isn't there... In my limited experience, you're almost always better off just leaving the image alone rather than expanding it. You can make it bigger by framing it centered in a larger image of transparent pixel border, and then your watermark will blot out huge chunks of it, perhaps, but it will layout okay, and at least the bits of image one can see aren't all chunky/ugly. -- Some people have a gift link here. Know what I want? I want you to buy a CD from some indie artist. http://cdbaby.com/browse/from/lynch Yeah, I get a buck. So? -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
RE: [PHP] image resize looks horrible..
Any ideas as to how I can fix this function???
-Original Message-
From: Edward Peloke [mailto:[EMAIL PROTECTED]
Sent: Thursday, June 03, 2004 4:18 PM
To: Php-General
Subject: [PHP] image resize looks horrible..
I am using the below function which does seem to resize the image yet the
colors in the resized image look horrible. How can I resize the image yet
keep the colors in tact?
Thanks,
Eddie
Justin-I tried your code but it didn't seem to do anything...I will just use
this function if the color will work.
function createthumb($name,$filename,$new_w,$new_h){
global $gd2;
$system=explode(.,$name);
$src_img=imagecreatefromjpeg($name);
$old_x=imageSX($src_img);
$old_y=imageSY($src_img);
if ($old_x $old_y) {
$thumb_w=$new_w;
$thumb_h=$old_y*($new_h/$old_x);
}
if ($old_x $old_y) {
$thumb_w=$old_x*($new_w/$old_y);
$thumb_h=$new_h;
}
if ($old_x == $old_y) {
$thumb_w=$new_w;
$thumb_h=$new_h;
}
if ($gd2==){
$dst_img=ImageCreate($thumb_w,$thumb_h);
imagecopyresized($dst_img,$src_img,0,0,0,0,$thumb_w,$thumb_h,$old_x,$old_y);
}else{
$dst_img=ImageCreateTrueColor($thumb_w,$thumb_h);
imagecopyresampled($dst_img,$src_img,0,0,0,0,$thumb_w,$thumb_h,$old_x,$old_y
);
}
if (preg_match(/png/,$system[1])){
imagepng($dst_img,$filename);
} else {
imagejpeg($dst_img,$filename);
}
imagedestroy($dst_img);
imagedestroy($src_img);
}
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Re: [PHP] image resize looks horrible..
Is $gd2 set right?
Edward Peloke wrote:
Any ideas as to how I can fix this function???
-Original Message-
From: Edward Peloke [mailto:[EMAIL PROTECTED]
Sent: Thursday, June 03, 2004 4:18 PM
To: Php-General
Subject: [PHP] image resize looks horrible..
I am using the below function which does seem to resize the image yet the
colors in the resized image look horrible. How can I resize the image yet
keep the colors in tact?
Thanks,
Eddie
Justin-I tried your code but it didn't seem to do anything...I will just use
this function if the color will work.
function createthumb($name,$filename,$new_w,$new_h){
global $gd2;
$system=explode(.,$name);
$src_img=imagecreatefromjpeg($name);
$old_x=imageSX($src_img);
$old_y=imageSY($src_img);
if ($old_x $old_y) {
$thumb_w=$new_w;
$thumb_h=$old_y*($new_h/$old_x);
}
if ($old_x $old_y) {
$thumb_w=$old_x*($new_w/$old_y);
$thumb_h=$new_h;
}
if ($old_x == $old_y) {
$thumb_w=$new_w;
$thumb_h=$new_h;
}
if ($gd2==){
$dst_img=ImageCreate($thumb_w,$thumb_h);
imagecopyresized($dst_img,$src_img,0,0,0,0,$thumb_w,$thumb_h,$old_x,$old_y);
}else{
$dst_img=ImageCreateTrueColor($thumb_w,$thumb_h);
imagecopyresampled($dst_img,$src_img,0,0,0,0,$thumb_w,$thumb_h,$old_x,$old_y
);
}
if (preg_match(/png/,$system[1])){
imagepng($dst_img,$filename);
} else {
imagejpeg($dst_img,$filename);
}
imagedestroy($dst_img);
imagedestroy($src_img);
}
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Re: [PHP] image resize looks horrible..
Are you using gd2 or not? If you're not, that's probably your problem.
Edward Peloke wrote:
Any ideas as to how I can fix this function???
-Original Message-
From: Edward Peloke [mailto:[EMAIL PROTECTED]
Sent: Thursday, June 03, 2004 4:18 PM
To: Php-General
Subject: [PHP] image resize looks horrible..
I am using the below function which does seem to resize the image yet the
colors in the resized image look horrible. How can I resize the image yet
keep the colors in tact?
Thanks,
Eddie
Justin-I tried your code but it didn't seem to do anything...I will just use
this function if the color will work.
function createthumb($name,$filename,$new_w,$new_h){
global $gd2;
$system=explode(.,$name);
$src_img=imagecreatefromjpeg($name);
$old_x=imageSX($src_img);
$old_y=imageSY($src_img);
if ($old_x $old_y) {
$thumb_w=$new_w;
$thumb_h=$old_y*($new_h/$old_x);
}
if ($old_x $old_y) {
$thumb_w=$old_x*($new_w/$old_y);
$thumb_h=$new_h;
}
if ($old_x == $old_y) {
$thumb_w=$new_w;
$thumb_h=$new_h;
}
if ($gd2==){
$dst_img=ImageCreate($thumb_w,$thumb_h);
imagecopyresized($dst_img,$src_img,0,0,0,0,$thumb_w,$thumb_h,$old_x,$old_y);
}else{
$dst_img=ImageCreateTrueColor($thumb_w,$thumb_h);
imagecopyresampled($dst_img,$src_img,0,0,0,0,$thumb_w,$thumb_h,$old_x,$old_y
);
}
if (preg_match(/png/,$system[1])){
imagepng($dst_img,$filename);
} else {
imagejpeg($dst_img,$filename);
}
imagedestroy($dst_img);
imagedestroy($src_img);
}
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[PHP] image resize looks horrible..
I am using the below function which does seem to resize the image yet the
colors in the resized image look horrible. How can I resize the image yet
keep the colors in tact?
Thanks,
Eddie
Justin-I tried your code but it didn't seem to do anything...I will just use
this function if the color will work.
function createthumb($name,$filename,$new_w,$new_h){
global $gd2;
$system=explode(.,$name);
$src_img=imagecreatefromjpeg($name);
$old_x=imageSX($src_img);
$old_y=imageSY($src_img);
if ($old_x $old_y) {
$thumb_w=$new_w;
$thumb_h=$old_y*($new_h/$old_x);
}
if ($old_x $old_y) {
$thumb_w=$old_x*($new_w/$old_y);
$thumb_h=$new_h;
}
if ($old_x == $old_y) {
$thumb_w=$new_w;
$thumb_h=$new_h;
}
if ($gd2==){
$dst_img=ImageCreate($thumb_w,$thumb_h);
imagecopyresized($dst_img,$src_img,0,0,0,0,$thumb_w,$thumb_h,$old_x,$old_y);
}else{
$dst_img=ImageCreateTrueColor($thumb_w,$thumb_h);
imagecopyresampled($dst_img,$src_img,0,0,0,0,$thumb_w,$thumb_h,$old_x,$old_y
);
}
if (preg_match(/png/,$system[1])){
imagepng($dst_img,$filename);
} else {
imagejpeg($dst_img,$filename);
}
imagedestroy($dst_img);
imagedestroy($src_img);
}
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that any unauthorized dissemination, distribution or copying of this
communication is strictly prohibited. If you have received this
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[PHP] image resize problems
I have looked at several of the functions and tried a few tutorials online
but am not having much luck for some reason resizing images. I have this
code which works fine but everytime I try to add some resizing code, I get
the error that the image is not a valid image resource. I have even
hardcoded the values to an image I know exists and get the same error. I
would like to resize the images on upload to 250 wide but nothing seems to
work.
$upload_dir = ../images/property_$id;
//When REGISTERED_GLOBALS are off in php.ini
$_POST= $HTTP_POST_VARS;
$_GET = $HTTP_GET_VARS;
//Upload the file
if($_GET['method'] == upload)
{
$file_array = $HTTP_POST_FILES['file'];
$_SESSION['message'] = ;
$uploads = false;
for($i = 0 ; $i $files_to_upload; $i++)
{
if($_FILES['file']['name'][$i])
{
$uploads = true;
if($_FILES['file']['name'][$i])
{
$file_to_upload = $upload_dir./.$_FILES['file']['name'][$i];
$thisName=$_FILES['file']['name'][$i];
$sql-query(update properties set
main_thumb='$thisName' where id=$id and main_thumb is null);
move_uploaded_file($_FILES['file']['tmp_name'][$i],$file_to_upload);
chmod($file_to_upload,0777);
// add image resize
$_SESSION['message'] .= $_FILES['file']['name'][$i].
uploaded.br;
}
}
}
if(!$uploads) $_SESSION['message'] = No files selected!;
}
Thanks,
Eddie
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[PHP] Image resize on upload
Hello all, I looked at the PHP manual and found a lot of things to do with images but I did not seem to find out how to resize an image on upload. Can anyone help?? Thanks in advance, ~WILL~ -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
[PHP] Image resize with background.
Hey guys. I have read a lot of different option to resize images. What about a script that will resize an image, constrain proportions, and add a background color to whatever is left. For example, I have a picture that is 600 (width) by 300 (height) and I want to constrain proportions, and resize this to 300 by 400 (width by height). There would be an extra 250 pixels left in the height, so now that gets filled in with some background color. This way, the people that have to make any image fit in a certain location can keep the same aspect ratio, and not have to have an 'out of place' image. Just a though. What do you guys think? -Chris [EMAIL PROTECTED]
RE: [PHP] Image resize with background.
try the resize copy function (can't remember the exact name ATM) Set the destination's first colour to the desired background colour, then copy/resize the image to it. Martin -Original Message- From: Chris [mailto:[EMAIL PROTECTED] Sent: Monday, 3 November 2003 12:36 PM To: [EMAIL PROTECTED] Subject: [PHP] Image resize with background. Hey guys. I have read a lot of different option to resize images. What about a script that will resize an image, constrain proportions, and add a background color to whatever is left. For example, I have a picture that is 600 (width) by 300 (height) and I want to constrain proportions, and resize this to 300 by 400 (width by height). There would be an extra 250 pixels left in the height, so now that gets filled in with some background color. This way, the people that have to make any image fit in a certain location can keep the same aspect ratio, and not have to have an 'out of place' image. Just a though. What do you guys think? -Chris [EMAIL PROTECTED] -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
[PHP] Image resize
hi to all, I have a problem here in image resizing, after the image has been resized , the image has been discolorized. How can i recreate the image with the same resolution and color properties. Here's the sample code from my class file: $origPic = ImageCreateFromJpeg( $this - iOrig[ 'tmp_name' ] ); $this - iNew = ImageCreate($nWidth,$nHeight); ImageCopyResized($this - iNew, $origPic, 0, 0, 0, 0, $nWidth, $nHeight, $width, $height); Thanx in advance. Mike -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] Image resize
if your system suports the commands, try imagecreatetruecolor() instead of imagecreate(), and imagecopyresampled() instead of imagecopyresized(), hope this helps, Hugh - Original Message - From: Michael P. Carel [EMAIL PROTECTED] To: [EMAIL PROTECTED] Sent: Wednesday, March 12, 2003 3:23 PM Subject: [PHP] Image resize hi to all, I have a problem here in image resizing, after the image has been resized , the image has been discolorized. How can i recreate the image with the same resolution and color properties. Here's the sample code from my class file: $origPic = ImageCreateFromJpeg( $this - iOrig[ 'tmp_name' ] ); $this - iNew = ImageCreate($nWidth,$nHeight); ImageCopyResized($this - iNew, $origPic, 0, 0, 0, 0, $nWidth, $nHeight, $width, $height); Thanx in advance. Mike -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] Image resize
thanks its working fine now. - Original Message - From: Hugh Danaher [EMAIL PROTECTED] To: Michael P. Carel [EMAIL PROTECTED] Cc: [EMAIL PROTECTED] Sent: Thursday, March 13, 2003 9:09 AM Subject: Re: [PHP] Image resize if your system suports the commands, try imagecreatetruecolor() instead of imagecreate(), and imagecopyresampled() instead of imagecopyresized(), hope this helps, Hugh - Original Message - From: Michael P. Carel [EMAIL PROTECTED] To: [EMAIL PROTECTED] Sent: Wednesday, March 12, 2003 3:23 PM Subject: [PHP] Image resize hi to all, I have a problem here in image resizing, after the image has been resized , the image has been discolorized. How can i recreate the image with the same resolution and color properties. Here's the sample code from my class file: $origPic = ImageCreateFromJpeg( $this - iOrig[ 'tmp_name' ] ); $this - iNew = ImageCreate($nWidth,$nHeight); ImageCopyResized($this - iNew, $origPic, 0, 0, 0, 0, $nWidth, $nHeight, $width, $height); Thanx in advance. Mike -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
[PHP] Image Resize
Hi guys, Is it possible to resize an uploaded file to 10% of it's size and rename it accordingly? I have the filename for the full-size image as filename-WWWxHHH.jpg where WWW is the width and HHH is the height. I want the re-sized image to have the filename filename-thumb-WWWxHHH.jpg where WWW is the resized width and HHH is the resized height. Does this make any sense, would it be possible automatically? I am grateful for any help, Ian. -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
[PHP] Image resize with database
(PHP 4.23, GD 1.6.2 or higher)
Hiya,
I have code to place the picture in a database, and I normally shrink it
when the user requests a picture. What I would like it to change to is that
it should shrink or expand the picture to be 300 pixels wide and then place
it into the database. I thought the function below would work to do to
return a text resized version.
It does sort of works, but makes a picture where only part of it is the
picture (top part), the rest is blank.
Any help would be gr8!
THanks,
Steve
function shrink_picture($tmp_name,$size,$name)
{
$result = ereg(.gif$,strtolower($name));
if($result)
{
$img = imagecreatefromgif($tmp_name);
}
else
{
$img = imagecreatefromjpeg($tmp_name);
}
$width = imagesx($img);
$height = imagesy($img);
$new_height = abs(300.0 * ($height/$width));
$new_img = imagecreate(300, $new_height );
imagecopyresized($new_img,$img,0,0,0,0,300,$new_height,imagesx($img),imagesy
($img));
imagejpeg($new_img,$tmp_name.a,70);
imagedestroy($new_img);
imagedestroy($img);
$data = addslashes(fread(fopen($tmp_name.a,r),$size));
return $data;
}
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[PHP] Image resize
Hello, I have an image (selected via a form), I know the original size of this picture 800x600. I'd like when I put the files in the database resize to 240x180, or 120x90. How do that ? Bye -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
[PHP] image-resize/convert
Hello, I'm creating a bunch of photogalleries and wondering about the following: - Is it possible to convert an image or a whole dir with images (jpg) to 60% of the original imagesize using php to automate this task? I know the gd library is installed, but don't know if it supports jpg... And what functions do I need to use? gd-variables in phpinfo(): GD Support enabled GD Version 1.6.2 or higher FreeType Support enabled FreeType Linkage with TTF library PNG Support enabled Hope you people can help. THanks, Bart Verbeek -- PHP General Mailing List (http://www.php.net/) To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] To contact the list administrators, e-mail: [EMAIL PROTECTED]
Re: [PHP] image-resize/convert
Hi. here is my GD report from PHPInfo() gd GD Support enabled GD Version 1.6.2 or higher FreeType Support enabled FreeType Linkage with TTF library GIF Support enabled JPG Support enabled PNG Support enabled WBMP Support enabled I think you don't have JPG enabled. As for resizing images yes, you can do that, i wrote bunch of scripts that does that for you. Whenever you need them mail me although they will be on my page soon. -elias http://www.kameelah.org/eassoft ""De Bodemschat"" [EMAIL PROTECTED] wrote in message [EMAIL PROTECTED]">news:[EMAIL PROTECTED]... Hello, I'm creating a bunch of photogalleries and wondering about the following: - Is it possible to convert an image or a whole dir with images (jpg) to 60% of the original imagesize using php to automate this task? I know the gd library is installed, but don't know if it supports jpg... And what functions do I need to use? gd-variables in phpinfo(): GD Support enabled GD Version 1.6.2 or higher FreeType Support enabled FreeType Linkage with TTF library PNG Support enabled Hope you people can help. THanks, Bart Verbeek -- PHP General Mailing List (http://www.php.net/) To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] To contact the list administrators, e-mail: [EMAIL PROTECTED] -- PHP General Mailing List (http://www.php.net/) To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] To contact the list administrators, e-mail: [EMAIL PROTECTED]
Re: [PHP] image-resize/convert
Again - if you have imagemagick installed email me and I'll email you my little class that does this. --Joe On Thu, Apr 19, 2001 at 10:02:47AM +0200, De Bodemschat wrote: Hello, I'm creating a bunch of photogalleries and wondering about the following: - Is it possible to convert an image or a whole dir with images (jpg) to 60% of the original imagesize using php to automate this task? I know the gd library is installed, but don't know if it supports jpg... And what functions do I need to use? gd-variables in phpinfo(): GD Support enabled GD Version 1.6.2 or higher FreeType Support enabled FreeType Linkage with TTF library PNG Support enabled Hope you people can help. THanks, Bart Verbeek -- PHP General Mailing List (http://www.php.net/) To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] To contact the list administrators, e-mail: [EMAIL PROTECTED] /* Joe Stump * Sr. PHP Developer * http://www.Care2.com http://www.joestump.net http://gtk.php-coder.net */ -- PHP General Mailing List (http://www.php.net/) To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] To contact the list administrators, e-mail: [EMAIL PROTECTED]
RE: [PHP] image-resize (thumbnail 150x150 code)
this is what i use to scale down an arbitrary .GIF or .JPG
image to 150x150...
$image_name is the name of the original file that you want
to create a thumbnail of...
function save_thumb($image_name,$image_type) {
global $Svar;
$new_w = 150;
$new_h = 150;
$image_path = "/path/of/imagedir/". $image_name;
$thumb_path = "/path/of/thumbdir/" . $image_name;
if ($image_type == "image/pjpeg") {
$src_img = imagecreatefromjpeg($image_path);
}
elseif($image_type == "image/gif") {
$src_img = imagecreatefromgif($image_path);
}
$dst_img = imagecreate($new_w,$new_h);
imagecopyresized($dst_img,$src_img,0,0,0,0,$new_w,$new_h,imagesx($src_img),imagesy($s
rc_img));
imagejpeg($dst_img, $thumb_path . "_t.jpg");
return 1;
}
-Original Message-
From: Joe Stump [mailto:[EMAIL PROTECTED]]
Sent: Thursday, April 19, 2001 17:18
To: De Bodemschat
Cc: Php-General-list
Subject: Re: [PHP] image-resize/convert
Again - if you have imagemagick installed email me and I'll email you my little
class that does this.
--Joe
On Thu, Apr 19, 2001 at 10:02:47AM +0200, De Bodemschat wrote:
Hello,
I'm creating a bunch of photogalleries and wondering about the following:
- Is it possible to convert an image or a whole dir with images (jpg) to 60%
of the original imagesize using php to automate this task?
I know the gd library is installed, but don't know if it supports jpg... And
what functions do I need to use?
gd-variables in phpinfo():
GD Support enabled
GD Version 1.6.2 or higher
FreeType Support enabled
FreeType Linkage with TTF library
PNG Support enabled
Hope you people can help.
THanks,
Bart Verbeek
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/* Joe Stump
* Sr. PHP Developer
* http://www.Care2.com http://www.joestump.net http://gtk.php-coder.net
*/
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[PHP] image resize
My goal.. Take an image (gif,jpg) from a remote server, resize it into 200x150 and then save it on my local server. My friend gave me a premade script but that doesnt work. Anyone have something like this already done or know where to find it? - Thanks -- PHP General Mailing List (http://www.php.net/) To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] To contact the list administrators, e-mail: [EMAIL PROTECTED]
