according to the docs use
-geometry 175x175> picture.jpeg
man mogrify:
-geometry <width>x<height>{+-}<x offset>{+-}<y offset>{%}{!}{<}{>}
preferred width and height of the image. See X(1) for
details about the geometry specification.
By default, the width and height are maximum values. That
is, the image is expanded or contracted to
fit the width and height value while maintaining the aspect
ratio of the image. Append an exclamation
point to the geometry to force the image size to exactly the
size you specify. For example, if you
specify 640x480! the image width is set to 640 pixels and
height to 480. If only one factor is speci
fied, both the width and height assume the value.
To specify a percentage width or height instead, append
%. The image size is multiplied by the width
and height percentages to obtain the final image
dimensions. To increase the size of an image, use a
value greater than 100 (e.g. 125%). To decrease an image's
size, use a percentage less than 100.
Use > to change the dimensions of the image only if its size
exceeds the geometry specification. <
resizes the image only if its dimensions is less than the
geometry specification. For example, if you
specify 640x480> and the image size is 512x512, the image
size does not change. However, if the image
is 1024x1024, it is resized to 640x480.
it looks like mogrify bases its resizing on the first value that is diff
than the one supplied i.e. if your image is 200x50 it will scale it to
175x? but if it is 50x200 it will scale it to ?x175
if it is important you not resize based on height use identify to get the
geometry first.
morgan
At 04:27 PM 4/18/2001, Noah Spitzer-Williams wrote:
>I have a bunch of pictures all in ranging filesizes and dimensions. I want
>to resize the ones that over 175 pixels wide to a 175 pixel wide picture
>however i want the height to scale down (ie. i dont want a really thin
>picture, i just want it to be what it would be if it were resized). i have
>this but i cant figure out how to just scale down the width:
>
>c:\progra~1\imagem~1\mogrify.exe -geometry 175x30! picture.jpeg
>
>the '!' forces those sizes to be used but obvoiusly i dont want the height
>to be 30. i want it to be whatever it should be so the picture doesnt look
>flattened.
>
>Thanks! - Noah
>
>
>
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