🐛 Fix Immutable Output from WSIReader (#850)

mostafajahanifar · web-flow · commit 70db18630282 · 2024-08-23T14:46:28.000+01:00
- Resolve issue #837 The output of WSI readers (read_rect, read_region, etc) are immutable, i.e. Read-only. We assume that created Numpy arrays created from PIL images in the `background_composite` are mutable by default. After Numpy v1.16.0, doing np.asarray(pil_image) will return an immutable Numpy array. Gladly, there is an easy fix for this, we should use `np.array()` instead of `np.asarray`.
diff --git a/tiatoolbox/utils/transforms.py b/tiatoolbox/utils/transforms.py
@@ -53,9 +53,9 @@ def background_composite(
     )
     composite.alpha_composite(image)
     if not alpha:
-        return np.asarray(composite.convert("RGB"))
+        return np.array(composite.convert("RGB"))
 
-    return np.asarray(composite)
+    return np.array(composite)
 
 
 def _convert_scalar_to_width_height(array: np.ndarray) -> np.ndarray:

Original file line number	Diff line number	Diff line change
`@@ -53,9 +53,9 @@ def background_composite(`
`53`	`53`	`)`
`54`	`54`	`composite.alpha_composite(image)`
`55`	`55`	`if not alpha:`
`56`		`- return np.asarray(composite.convert("RGB"))`
	`56`	`+ return np.array(composite.convert("RGB"))`
`57`	`57`
`58`		`- return np.asarray(composite)`
	`58`	`+ return np.array(composite)`
`59`	`59`
`60`	`60`
`61`	`61`	`def _convert_scalar_to_width_height(array: np.ndarray) -> np.ndarray:`