Resizing images by 50% doubles the file size?

[XnXo]

I am using XnView MP. I have a set of images that I would like to resize to produce smaller files sizes.

The dimensions of the original images is 5544 x 4154. The files size is typically 2.67Mb.

When I use the batch process to reduce the size 50%, when the images are saved as jpg, the resolution is halved, but the file size is almost double, over 4.7 Mb.

What accounts for this? How can I reduce both the dimensions of the image, and also get a smaller file size?

Thank you.

[cday]

When I use the batch process to reduce the size 50%, when the images are saved as jpg, the resolution is halved, but the file size is almost double, over 4.7 Mb.

On the Output tab, check the JPEG save settings...

Your resized images are probably being saved at a higher quality value than the original images, see Image > Properties... or 'i' icon on the toolbar.