Directory mode silently skips .JPG/.PNG (case-sensitive extension check)

[chirag127]

Problem

Directory mode skips files with uppercase extensions (.JPG, .JPEG, .PNG) because the endswith check is case-sensitive. Common iPhone/Android/Windows camera outputs are .JPG and get silently ignored with no warning.

Steps

1. mkdir photos && cp IMG_0001.JPG photos/ (uppercase extension, as produced by most cameras)
2. split-image photos 2 2

Expected

Image tiled into 4 pieces.

Actual

Output: Splitting all images in directory: photos then Done! — file skipped silently, no tiles produced, no warning.

Cite

src/split_image/split.py:175:

if file.endswith(".jpg") or file.endswith(".jpeg") or file.endswith(".png"):

Fix: lowercase the extension before compare, e.g. if file.lower().endswith((".jpg", ".jpeg", ".png")). Also consider adding .webp, .bmp, .tiff (all Pillow-supported).

Environment

split-image 2.0.3 (setup.py), Pillow>=9.0.0, Python >=3.6, any OS.

Thanks for maintaining whiplashoo/split-image!