ImageMagick Tips and Tricks Part I
I will use a reference image throughout, an MG Midget with a couple of people standing by it: mg.jpg. This is a jpg image, with dimensions of 1024 x 683, file size of 519kb
2. Crop Image
You need to specify the output size (150×125) plus the start position for x & y on the original photo (+350+350). It may take some trial and error to find the exact spot! The +repage setting removed the virtual canvas (blank space left of original image after cropping).