Resizing Different Size Images to the SAME Size

Hi all,

I would like to change several different size images to make them the same exact size. However, when I simply resize them, some of them look distorted, as they get stretched or compressed to fit into that size.

How do I resize multiple pictures and make them the same exact specified size while maintaining each picture's proportion?

Thanks so much!

[Matt Kindig]

If the original pictures don't have the same aspect ratio as the target image size, then they will be distorted when resizing--there really isn't any way around this.

[Walter Roberson]

Unless padding is added so that a portion of the resized picture ends up being solid black (or whatever)

[Image Analyst]

And, just to round out the comments: http://matlab.wikia.com/wiki/FAQ#How_can_I_process_a_sequence_of_files.3F And, you can use imresize(). Also, what size do you want them? As big as the biggest image height or width? As big as the smallest image? Some fixed size? Or something else?

[Steven]

Thanks for the responses.

As big as the biggest image height would be preferred (but anyway to get them to be the same size would suffice).

Is that not possible without distorting?

[Walter Roberson]

Not if any of them are different aspect ratios from the other, not unless you are willing to lose part of the picture.

For example, suppose one image was 800 x 400, and another image was 400 x 250. You can expand the second image to 800 high with no distortion by doubling in both dimensions, but that would get you 800 x 500 rather than 800 x 400 like the first image is. You could throw away 100 after the expansion to 800 x 500, but that would lose information. If you were to resize the 800 x 500 to be 800 x 400 without cutting out any information and without adding padding, then objects would end up scaled to 4/5 of their original width, which would (for example) squash circles into ellipses.

[Steven]

That makes sense. Thanks Walter.