how to choose the correct height/width for images

[Kentor]

Hello,
I have users that submit images to my website. By default I choose to
make the width bigger than the height because usually pictures are
taken horizontally... But in some cases people take pictures
vertically so what I'm getting at is... can I know whether an image
was taken horizontally or vertically so I can make the proper width/
height lengths so that it looks nice and not kinda weird... because if
you make the width bigger than the height of an image that is supposed
to have a bigger height than width, it looks kinda ugly.. And also is
there a way to know when I've enlarged the image too much? because if
an image submitted was small and I make it bigger, then it also
becomes kind of ugly to look at because I guess there aren't enough
pixels... thanks for your help.

Simon

[Curtis]

On Wed, 31 Jan 2007 20:58:57 -0800, Kentor <ke****@gmail.comwrote:

Hello,
I have users that submit images to my website. By default I choose to
make the width bigger than the height because usually pictures are
taken horizontally... But in some cases people take pictures
vertically so what I'm getting at is... can I know whether an image
was taken horizontally or vertically so I can make the proper width/
height lengths so that it looks nice and not kinda weird... because if
you make the width bigger than the height of an image that is supposed
to have a bigger height than width, it looks kinda ugly.. And also is
there a way to know when I've enlarged the image too much? because if
an image submitted was small and I make it bigger, then it also
becomes kind of ugly to look at because I guess there aren't enough
pixels... thanks for your help.

Simon

If you are using the GD library, have a look at imagecopyresampled:

Example: "Example 2. Resampling an image proportionally"
http://php.net/imagecopyresampled

--
Curtis, http://dyersweb.com

[Kentor]

On Feb 1, 12:10 am, Curtis <[e-mail]:

On Wed, 31 Jan 2007 20:58:57 -0800, Kentor <[e-mail]:

Hello,
I have users that submit images to my website. By default I choose to
make the width bigger than the height because usually pictures are
taken horizontally... But in some cases people take pictures
vertically so what I'm getting at is... can I know whether an image
was taken horizontally or vertically so I can make the proper width/
height lengths so that it looks nice and not kinda weird... because if
you make the width bigger than the height of an image that is supposed
to have a bigger height than width, it looks kinda ugly.. And also is
there a way to know when I've enlarged the image too much? because if
an image submitted was small and I make it bigger, then it also
becomes kind of ugly to look at because I guess there aren't enough
pixels... thanks for your help.

Simon

If you are using the GD library, have a look at imagecopyresampled:

Example: "Example 2. Resampling an image proportionally"http://php.net/imagecopyresampled

--
Curtis,http://dyersweb.com

Thanks, but this stuff will resize it to 200 by 200 as in the example
or 50% of the original size... But I would like to have the image
bigger horizontally if this is the images original setting... but I
don't want the images original size because someone may upload a huge
image that will take half the screen... so I need to figure out a way
to know if the original image has a bigger width or height...

[CH4:D]

Kentor wrote:

On Feb 1, 12:10 am, Curtis <[e-mail]:

On Wed, 31 Jan 2007 20:58:57 -0800, Kentor <[e-mail]:

Hello,
I have users that submit images to my website. By default I
choose to make the width bigger than the height because usually
pictures are taken horizontally... But in some cases people take
pictures vertically so what I'm getting at is... can I know
whether an image was taken horizontally or vertically so I can
make the proper width/ height lengths so that it looks nice and
not kinda weird... because if you make the width bigger than the
height of an image that is supposed to have a bigger height than
width, it looks kinda ugly.. And also is there a way to know when
I've enlarged the image too much? because if an image submitted
was small and I make it bigger, then it also becomes kind of ugly
to look at because I guess there aren't enough pixels... thanks
for your help.

Simon

If you are using the GD library, have a look at imagecopyresampled:

Example: "Example 2. Resampling an image
proportionally"http://php.net/imagecopyresampled

--
Curtis,http://dyersweb.com

Thanks, but this stuff will resize it to 200 by 200 as in the example
or 50% of the original size... But I would like to have the image
bigger horizontally if this is the images original setting... but I
don't want the images original size because someone may upload a huge
image that will take half the screen... so I need to figure out a way
to know if the original image has a bigger width or height...

This may sound a little bit anti-user but it would be the only surefire
way. You might want to add a note on the conditions to upload pictures.
Like "please upload photos of height x width only". I don't think it
can kill them to spruce up their images before they upload it. You can
then add conditions in your code to trap images that don't match
exactly what you're expecting and ditch it.

Personally, I'd just resize all images to a reasonable size so it
wouldn't look ugly regardless of orientation. You can do something like
google images that wraps the images with a square box so that they all
look all arranged in boxes to cancel out the random orientations.

--

[Curtis]

On Wed, 31 Jan 2007 21:15:25 -0800, Kentor <ke****@gmail.comwrote:

On Feb 1, 12:10 am, Curtis <[e-mail]:

>On Wed, 31 Jan 2007 20:58:57 -0800, Kentor <[e-mail]:

Hello,
I have users that submit images to my website. By default I choose to
make the width bigger than the height because usually pictures are
taken horizontally... But in some cases people take pictures
vertically so what I'm getting at is... can I know whether an image
was taken horizontally or vertically so I can make the proper width/
height lengths so that it looks nice and not kinda weird... because if
you make the width bigger than the height of an image that is supposed
to have a bigger height than width, it looks kinda ugly.. And also is
there a way to know when I've enlarged the image too much? because if
an image submitted was small and I make it bigger, then it also
becomes kind of ugly to look at because I guess there aren't enough
pixels... thanks for your help.

Simon

If you are using the GD library, have a look at imagecopyresampled:

Example: "Example 2. Resampling an image
proportionally"http://php.net/imagecopyresampled

--
Curtis,http://dyersweb.com

Thanks, but this stuff will resize it to 200 by 200 as in the example
or 50% of the original size... But I would like to have the image
bigger horizontally if this is the images original setting... but I
don't want the images original size because someone may upload a huge
image that will take half the screen... so I need to figure out a way
to know if the original image has a bigger width or height...

That's the whole point, they specify arbitrary maximum size limits. If
someone uploaded a huge image, it would be resampled to 200x200. You can
change those size limits how you want. You can specify that the width is
bigger than the height, if you want.

--
Curtis, http://dyersweb.com

[leader]

On Thu, 01 Feb 2007 05:10:10 GMT, Curtis <dy******@verizon.netwrote:

>On Wed, 31 Jan 2007 20:58:57 -0800, Kentor <ke****@gmail.comwrote:

>Hello,
I have users that submit images to my website. By default I choose to
make the width bigger than the height because usually pictures are
taken horizontally... But in some cases people take pictures
vertically so what I'm getting at is... can I know whether an image
was taken horizontally or vertically so I can make the proper width/
height lengths so that it looks nice and not kinda weird... because if
you make the width bigger than the height of an image that is supposed
to have a bigger height than width, it looks kinda ugly.. And also is
there a way to know when I've enlarged the image too much? because if
an image submitted was small and I make it bigger, then it also
becomes kind of ugly to look at because I guess there aren't enough
pixels... thanks for your help.

Simon

If you are using the GD library, have a look at imagecopyresampled:

Example: "Example 2. Resampling an image proportionally"
http://php.net/imagecopyresampled

Also, the getimagesize function might provfe a helpful tool for some
decision-making.

[lorento]

You can use getimagesize() function. http://www.php.net/getimagesize

You will get the height and width of the picture.
If height width = portrait
If width height = landscape

Then you can resize the image e.g resize all height into 50 pixel
newheight = 50
newwidth = width * (50 / height)

Or e.g resize image, if potrait height = 50, if landscape width = 50

if portrait
newheight = 50
newwidth = width * (50 / height)

if landscape
newwidth = 50
newheight = height * (50/width)

------
http://www.mastervb.net
http://www.theaussiemap.com
http://www.theukmap.com
On Feb 1, 12:42 pm, "CH4:D" <[e-mail]:

Kentor wrote:

On Feb 1, 12:10 am, Curtis <[e-mail]:

On Wed, 31 Jan 2007 20:58:57 -0800, Kentor <[e-mail]:
Hello,
I have users that submit images to my website. By default I
choose to make the width bigger than the height because usually
pictures are taken horizontally... But in some cases people take
pictures vertically so what I'm getting at is... can I know
whether an image was taken horizontally or vertically so I can
make the proper width/ height lengths so that it looks nice and
not kinda weird... because if you make the width bigger than the
height of an image that is supposed to have a bigger height than
width, it looks kinda ugly.. And also is there a way to know when
I've enlarged the image too much? because if an image submitted
was small and I make it bigger, then it also becomes kind of ugly
to look at because I guess there aren't enough pixels... thanks
for your help.

Simon

If you are using the GD library, have a look at imagecopyresampled:

Example: "Example 2. Resampling an image
proportionally"http://php.net/imagecopyresampled

--
Curtis,http://dyersweb.com

Thanks, but this stuff will resize it to 200 by 200 as in the example
or 50% of the original size... But I would like to have the image
bigger horizontally if this is the images original setting... but I
don't want the images original size because someone may upload a huge
image that will take half the screen... so I need to figure out a way
to know if the original image has a bigger width or height...

This may sound a little bit anti-user but it would be the only surefire
way. You might want to add a note on the conditions to upload pictures.
Like "please upload photos of height x width only". I don't think it
can kill them to spruce up their images before they upload it. You can
then add conditions in your code to trap images that don't match
exactly what you're expecting and ditch it.

Personally, I'd just resize all images to a reasonable size so it
wouldn't look ugly regardless of orientation. You can do something like
google images that wraps the images with a square box so that they all
look all arranged in boxes to cancel out the random orientations.

--

[Kentor]

On Feb 1, 4:41 am, "lorento" <[e-mail]:

You can use getimagesize() function.http://www.php.net/getimagesize

You will get the height and width of the picture.
If height width = portrait
If width height = landscape

Then you can resize the image e.g resize all height into 50 pixel
newheight = 50
newwidth = width * (50 / height)

Or e.g resize image, if potrait height = 50, if landscape width = 50

if portrait
newheight = 50
newwidth = width * (50 / height)

if landscape
newwidth = 50
newheight = height * (50/width)

------http://www.mastervb.nethttp://www.theaussiemap.comhttp://www.theukmap.com
On Feb 1, 12:42 pm, "CH4:D" <[e-mail]:

Kentor wrote:

On Feb 1, 12:10 am, Curtis <[e-mail]:
On Wed, 31 Jan 2007 20:58:57 -0800, Kentor <[e-mail]:
Hello,
I have users that submit images to my website. By default I
choose to make the width bigger than the height because usually
pictures are taken horizontally... But in some cases people take
pictures vertically so what I'm getting at is... can I know
whether an image was taken horizontally or vertically so I can
make the proper width/ height lengths so that it looks nice and
not kinda weird... because if you make the width bigger than the
height of an image that is supposed to have a bigger height than
width, it looks kinda ugly.. And also is there a way to know when
I've enlarged the image too much? because if an image submitted
was small and I make it bigger, then it also becomes kind of ugly
to look at because I guess there aren't enough pixels... thanks
for your help.

Simon

If you are using the GD library, have a look at imagecopyresampled:

Example: "Example 2. Resampling an image
proportionally"http://php.net/imagecopyresampled

--
Curtis,http://dyersweb.com

Thanks, but this stuff will resize it to 200 by 200 as in the example
or 50% of the original size... But I would like to have the image
bigger horizontally if this is the images original setting... but I
don't want the images original size because someone may upload a huge
image that will take half the screen... so I need to figure out a way
to know if the original image has a bigger width or height...

This may sound a little bit anti-user but it would be the only surefire
way. You might want to add a note on the conditions to upload pictures.
Like "please upload photos of height x width only". I don't think it
can kill them to spruce up their images before they upload it. You can
then add conditions in your code to trap images that don't match
exactly what you're expecting and ditch it.

Personally, I'd just resize all images to a reasonable size so it
wouldn't look ugly regardless of orientation. You can do something like
google images that wraps the images with a square box so that they all
look all arranged in boxes to cancel out the random orientations.

--

Aha! I think http://www.php.net/getimagesize will do the job, thanks :)

[VS]

Sounds like you need to re-size the image based on Width / Height Ratio
between the original image and your maximum desired size. I've not done
Image re-sizing in PHP, but you might be able to devise your own based
on this bit of Perl that I used:

# CreateThumbnail(Source, Destination)
sub CreateThumbnail
{
my( $src_file, $dst_file) = @_;

my $quality = 100;
my $newwidth = 160;
my $newheight = 120;

# create a new image from original
$im = GD::Image->newFromJpeg($src_file);
($width, $height) = $im->getBounds();

# Width / Height Ratio's
$wr = $width / $newwidth;
$hr = $height / $newheight;

if ($wr $hr){
$newheight = int(($height / $wr)+0.5);
$newwidth = int(($width / $wr)+0.5);
}else{
$newheight = int(($height / $hr)+0.5);
$newwidth = int(($width / $hr)+0.5);
}

# new image for re-sized / re-sampled version
$outim = new GD::Image($newwidth, $newheight);
$outim->copyResized($im, 0, 0, 0, 0, $newwidth, $newheight,
$width, $height);
$outim->interlaced('true');

# Put a black frame around the Image
$black = $outim->colorAllocate(0,0,0);
$outim->rectangle(0,0,$newwidth-1,$newheight-1,$black);

#save the new Image...
open(DST , '>', "$dst_file") || die "could not write image: $!";
binmode DST;
print DST ($outim->jpeg($quality));
close(DST);
}

--
VS