54 lines
1.6 KiB
Python
54 lines
1.6 KiB
Python
|
def crop(clip, x1=None, y1=None, x2=None, y2=None, width=None, height=None, x_center=None, y_center=None):
|
||
|
|
"""
|
||
|
|
Returns a new clip in which just a rectangular subregion of the
|
||
|
|
original clip is conserved. x1,y1 indicates the top left corner and
|
||
|
|
x2,y2 is the lower right corner of the croped region.
|
||
|
|
All coordinates are in pixels. Float numbers are accepted.
|
||
|
|
|
||
|
|
To crop an arbitrary rectangle:
|
||
|
|
|
||
|
|
>>> crop(clip, x1=50, y1=60, x2=460, y2=275)
|
||
|
|
|
||
|
|
Only remove the part above y=30:
|
||
|
|
|
||
|
|
>>> crop(clip, y1=30)
|
||
|
|
|
||
|
|
Crop a rectangle that starts 10 pixels left and is 200px wide
|
||
|
|
|
||
|
|
>>> crop(clip, x1=10, width=200)
|
||
|
|
|
||
|
|
Crop a rectangle centered in x,y=(300,400), width=50, height=150 :
|
||
|
|
|
||
|
|
>>> crop(clip, x_center=300 , y_center=400,
|
||
|
|
width=50, height=150)
|
||
|
|
|
||
|
|
Any combination of the above should work, like for this rectangle
|
||
|
|
centered in x=300, with explicit y-boundaries:
|
||
|
|
|
||
|
|
>>> crop(x_center=300, width=400, y1=100, y2=600)
|
||
|
|
|
||
|
|
"""
|
||
|
|
|
||
|
|
if width and x1 is not None:
|
||
|
|
x2 = x1 + width
|
||
|
|
elif width and x2 is not None:
|
||
|
|
x1 = x2 - width
|
||
|
|
|
||
|
|
if height and y1 is not None:
|
||
|
|
y2 = y1 + height
|
||
|
|
elif height and y2 is not None:
|
||
|
|
y1 = y2 - height
|
||
|
|
|
||
|
|
if x_center:
|
||
|
|
x1, x2 = x_center - width / 2, x_center + width / 2
|
||
|
|
|
||
|
|
if y_center:
|
||
|
|
y1, y2 = y_center - height / 2, y_center + height / 2
|
||
|
|
|
||
|
|
x1 = x1 or 0
|
||
|
|
y1 = y1 or 0
|
||
|
|
x2 = x2 or clip.size[0]
|
||
|
|
y2 = y2 or clip.size[1]
|
||
|
|
|
||
|
|
return clip.fl_image(lambda pic: pic[int(y1) : int(y2), int(x1) : int(x2)], apply_to=["mask"])
|