Legacy ImageMagick Discussions Archive

I tried this: As I'd prefer to use mogrify vs convert for batches of images, and this resulted in images that were the same 73MB as the original, but their DPI reports as 4880 in Photoshop.

So...I think this is solved! Thanks!!

The original image is showing up as uncompressed, sorry. So that's the 73MB image.

The altered image with the adjusted DPI, the 136MB image, identify -verbose reports "Compression: RLE".

If I use the -verbose command, it lists "Compression: None"... is that useful information?

Thanks for the reply. I'm not trying to change the number of pixels, just the dpi/print area.

I ran identify and the output was:
BMP3 8192x9216 8129x9216+0+0 8-bit sRGB 256c 75.5MB 0.437u 0:00.275

I have not tried -compress, not exactly sure how to use it.

I'll start off by letting you know I'm new to Imagemagick. What I'm trying to do with the software is change the dpi of scanned images. Ideally I'd like to apply a horizontal and vertical dpi, as our image has different horizontal and vertical pixel dimensions, but it's fine if square pixels are my ...