问题描述
当我运行我的 PIL 代码时，它有这个错误:
when I run my PIL code ,it has this error:
from PIL import Image,ImageDraw, ImageColor, ImageChops
# Load images
im1 = Image.open('im1.png')
im2 = Image.open('im2.png')
# Flood fill white edges of image 2 with black
seed = (0, 0)
black = ImageColor.getrgb("black")
ImageDraw.floodfill(im2, seed, black, thresh=127)
# Now select lighter pixel of image1 and image2 at each pixel location and
result = ImageChops.lighter(im1, im2)
result.save('result.png')
错误出在我的图像处理中:
the error is in my image processing:
Traceback (most recent call last):
File "C:\Users\Martin
Ma\Desktop\test\36\light_3_global\close_open\gray\main.py", line 96, in <module>
ImageDraw.floodfill(im2, seed, black, thresh=127)
File "E:\python\lib\site-packages\PIL\ImageDraw.py", line 346, in floodfill
if _color_diff(value, background) <= thresh:
File "E:\python\lib\site-packages\PIL\ImageDraw.py", line 386, in _color_diff
return abs(rgb1[0]-rgb2[0]) + abs(rgb1[1]-rgb2[1]) + abs(rgb1[2]-rgb2[2])
TypeError: 'int' object is not subscriptable
我该如何解决?非常感谢！
how can I solve it? thanks a lot !
推荐答案
您在未考虑后果的情况下更改了图像类型.JPEG 和 PNG 是根本不同的野兽，您需要注意这一点:
You have changed image type without thinking about the consequences. JPEG and PNG are fundamentally different beasts, and you need to be aware of that:
JPEG 图像是有损保存的，因此您的数据通常不会以您写入的相同值读回 - 这似乎让每个人都感到震惊.他们对图像进行阈值处理，使所有高于 127 的值变为白色，其他值变为黑色并具有真正的二值图像，然后他们将保存为 JPEG 并惊讶地发现，在重新加载时，尽管已对其进行了阈值处理，但该图像仍有 78 种颜色.
JPEG images are lossily saved, so your data will not generally be read back with the same values you wrote - this seems to shock everyone. They threshold an image so that all values above 127 go white and others go black and have a true binary image, they then save as JPEG and are amazed that on reloading, the image has 78 colours despite having thresholded it.
JPEG 图像具有各种伪像 - 大块的噪声会扰乱您的处理 - 特别是如果您查看饱和度.
JPEG images have all sorts of artefacts - chunky blocks of noise which will mess up your processing - especially if you look at saturation.
PNG 图像通常是调色板，其中每个像素将索引存储到 256 色调色板中，而不是 RGB 三元组.大多数操作在调色图像上都会失败，因为您将索引与 RGB 颜色三元组进行比较.
PNG images are often palettised where each pixel stores an index into a 256-colour palette, rather than an RGB triplet. Most operations will fail on palettised images because you are comparing an index with an RGB colour triplet.
PNG 图像通常是灰度的 - 因此只有一个通道，与 RGB 三元组的比较将失败，因为通道数量不同.
PNG images are often greyscale - so there is only one channel and comparisons with RGB triplets will fail because the number of channels differs.
因此，在回答您的问题时，我怀疑您的 PNG 图像已调色(尤其是当它只有 2 种颜色时).因此，您需要在打开时将其转换为 RGB 或亮度模式:
So, in answer to your question, I suspect your PNG image is palettised (especially likely when it only has 2 colours). You therefore need to convert it to RGB or maybe Luminance mode on opening:
im1 = Image.open('im1.png').convert('RGB')
这篇关于类型错误:“int"对象不可下标?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！