我有一个背景图片,我想在上面叠加透明图片。到目前为止,我已经尝试了很多选择,但都没有一个很好的选择。最后,我找到了以下代码:
processedImagePIL = Image.fromarray(processedImage) #since we use opencv
shuttleImagePIL = Image.fromarray(shuttleIcon) #since we use opencv
blended = Image.blend(processedImagePIL, shuttleImagePIL, alpha=0.5)
但即使那样也给我带来尺寸错误
ValueError: images do not match
我不知道为什么图像大小应该相等,因为我要覆盖的是一个小图标,希望它和我的背景一样大是愚蠢的。有没有在Python中有效的简单算法?任何软件包或实现都可以。
答案 0 :(得分:0)
好的,我已经通过OpenCV运行它了
# function to overlay a transparent image on background.
def transparentOverlay(backgroundImage, overlayImage, pos=(0, 0), scale=1):
overlayImage = cv2.resize(overlayImage, (0, 0), fx=scale, fy=scale)
h, w, _ = overlayImage.shape # Size of foreground
rows, cols, _ = backgroundImage.shape # Size of background Image
y, x = pos[0], pos[1] # Position of foreground/overlayImage image
# loop over all pixels and apply the blending equation
for i in range(h):
for j in range(w):
if x + i >= rows or y + j >= cols:
continue
alpha = float(overlayImage[i][j][3] / 255.0) # read the alpha channel
backgroundImage[x + i][y + j] = alpha * overlayImage[i][j][:3] + (1 - alpha) * backgroundImage[x + i][y + j]
return backgroundImage
然后按如下方式使用:
# Overlay transparent images at desired postion(x,y) and Scale.
result = transparentOverlay(processedImage, shuttleIcon, tuple(trackedCenterPoint), 0.7)
似乎解决了我的问题。