Question

Help me in extracting the pie chart data from attached PDF using Python. PDF: https://i.dell.com/sites/csdocuments/CorpComm_Docs/en/carbon-footprint-poweredge-m630.pdf

Thanks in Advance Santhosh

我曾尝试使用PyPDF2、PyMuPDF图书馆。既然是新来的,就没有确定实现这一目标的所有现有方法和其他图书馆。

Answer 1

这是使用PyPDF2图书馆的一种做法。

Convert PDF to Image using PyMuPDF lib or pdf2image to convert the PDF pages to images.
You could install pdf2image using: pip install pdf2image
Use an image processing library like OpenCV or PIL to analyze the pie chart image and extract data, and finally once you ve successfully extracted the image data, you can use image analysis techniques to determine the size or percentage of each slice in the pie chart.

Here s a small example using OpenCV

#Load the image
image_path =  path/to/your/image.png 
image = cv2.imread(image_path)
gray = cv2.cvtColor(image, cv2.COLOR_BGR2GRAY)

#Thresholding
_, thresh = cv2.threshold(gray, 128, 255, cv2.THRESH_BINARY_INV)

#Find contours
contours, _ = cv2.findContours(thresh, cv2.RETR_EXTERNAL, cv2.CHAIN_APPROX_SIMPLE)

#Print the number of contours (slices in the pie chart)
print("Number of slices:", len(contours))

#Draw the contours on the image
cv2.drawContours(image, contours, -1, (0, 255, 0), 2)

#Display the image
cv2.imshow( Image with Contours , image)

Answer 2

你们在决定方法之前,必须分析任何PDF物体,例如,国防军提供的图像实际上是内部图像资源的缩影,因此,需要提取图像来保持质量。

因此,在这种情况下,Poppler pdfimages是一种好的方法。你们要么当眼看着人民抵抗力量(并作出决定),要么从沙里德使用普勒,从军阀手中夺走。

如果你一度提取所有图像,就不必按页打印,就如此,第2页的图像也将输出到同一页。

Note that OCR will not usually be able to recognise data at an angle such as along the bottom edge only those at 0 or 90 degrees as seen on the Left

However for horizontal text OCR is not usually a problem

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