Constraint proportions in Image resize

Hi,

I use MB tasks to resize my images. Currently I am using the "Image Size" transformer to resize a bulk image to different sizes.
However , when I use "constraint proportions" , the image looks proper but it does not resize to the desired size.
Say, for eg,

I have a 934x526 dimension image. When I resize this to 494x248 image(with constraint proportions), it resizes to 440x248.

However , when i resize it , without using constraint proportions , it resizes to the actual size but the image is skewed/stretched.

Is there a workaround this ?

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Migrateduser_427

I am not sure what kind of "workaround" you are looking for, as this is basic to any image processing...

Do you want the image to "crop" to the exact sizing?

Constraining by image dimensions will fit the image inside of your height and width. For example, if the source image is taller than wider then the target image height will be at the exact height you have set, and the width will be smaller since any lager width would change the actual image dimensions (stretch it or skew it).

If you want the target image to be in an exact height and width size, you could use the cropper transformation which will cut the image to fit (remove some size from height or width). However this would take some manual manipulation to get the image right; automatic system cropping might produce an image where the main artifacts of the subject within the image being cut out.

Migrateduser

No, I do not want any manual intervention here. So when we use image size transformation without constraint proportions, it will resize to the correct size but we are not sure about the quality of the image. So this remains as an actual constraint ?

Also , I do not want to use the cropper transformation as I do not want chunks of the image cut off.

Regards,

Mav

Migrateduser_427

Think of physics...

In order to not distort, skew, or alter an item, you must change size by ratio (or scale) up or down. Otherwise item will be altered into something else entirely, not merely smaller or larger.

Constrain proportions is setting the ratio to use as the largest size (either height or width) of the source asset to fit within the "box" size you defined.

That is to say, either height or width might not be to the exact pixel size you specified, however the height or width will never be out side of your ratio. Also, the largest size will be one of your defined size specifications (either height or width).

Migrateduser

Yeah i get what you say Shawn.

I just want to know if the change of dimensions(pixels) for either height or width, will have an impact for the image when deployed to the IIS server. As you said, the larger dimension will be the same( as I have also noticed ) .

Would love to hear your views on the same.

Mav

Migrateduser

As Shawn mentioned, the dimensions will vary as per the constrain proportions in Image resize primitive.

Migrateduser

Here is the snipped from Task Administration guide.

"The Image Size primitive has two functions. It can change the number of physical pixels and it can change the image resolution (the ratio between pixels and physical units). In this sample task, the output is set to 100x100 pixels and 72 dpi. However, since the “Constrain Proportions” option is enabled, the larger dimension will be 100 pixels and the smaller dimensions will be whatever value is required to keep the aspect ratio correct. For example, for an image in landscape mode the width will be 100 pixels and the height may be less than 100, and in portrait mode, the opposite is true."

Migrateduser_427

... will have an impact for the image when deployed to the IIS server. As you said, the larger dimension will be the same( as I have also noticed ) .

Would love to hear your views on the same.

Mav

You mean concern with IIS and height/width of an image?

Concern with IIS (and website for that matter) comes when you have a rather large file getting deployed and served to the site; the larger the file, the longer to deploy to the server, and the longer for the site user to download.

The MB task will make the image smaller (unless the image was smaller than your specs to begin with) in file size.

Other than that, I don't know what else you are looking for.