bmp gif jpeg jpg png tiff tif Create a sample image with each file extension.
$ sh create-image.sh width-size height-size
$ sh create-image.sh 1500 1500
$ tree
.
├── create-image.sh
└── images
├── 1500x1500.bmp
├── 1500x1500.gif
├── 1500x1500.jpeg
├── 1500x1500.jpg
├── 1500x1500.png
├── 1500x1500.tif
└── 1500x1500.tiff