Convert polygon to real coodinates in image

Question

Hello. I get response API from Azure Document Intelligence Layout Model and I want to extract bounding box cells, columns, and rows. But I still haven't found a way to convert polygon output to a bounding box(x_min, y_min, x_max, y_max), because the image has size (1656, 2339) but the polygon coordinates are quite small ( < 20)

My question is: How to convert a polygon into bounding box format?

The pdf input and the API response have the below result:

{
						"rowIndex": 1,
						"columnIndex": 0,
						"content": "TÀI SẢN NGẮN HẠN",
						"boundingRegions": [
							{
								"pageNumber": 1,
								"polygon": [
									0.9917,
									2.017,
									3.9064,
									2.0353,
									3.9064,
									2.3276,
									0.9917,
									2.3276
								]
							}
						],
						"spans": [
							{
								"offset": 219,
								"length": 16
							}
						]





					}

Answer 1

Hi @ĐÀO MINH KHÁNH

I'm glad that you were able to resolve your issue and thank you for posting your solution so that others experiencing the same thing can easily reference this! Since the Microsoft Q&A community has a policy that "The question author cannot accept their own answer. They can only accept answers by others ", I'll repost your solution in case you'd like to accept the answer.

x_min = 0.9917 / width * 1656 
y_min = 2.017 / height * 2339 
x_max = 3.9064 / width * 1656 
y_max = 2.3276 / height * 2339

where width and height can be obtained from the API response.

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