如何从图像中提取签名(Python脚本)? [英] How to extract signature from an image (python script)?

问题描述

以下是签名的示例图片:

如何从没有背景的图像中获取签名，以便将其粘贴到用户图像上.如果背景不是白色怎么办?

我尝试了

但是它的边​​缘不是很干净！外面有人可以排序吗?

Here is a sample image of signature :

How to get the signature from this image without background so that I can paste it over user image. What if background is not white?

I have tried this, how to customize it for different background colors?

解决方案

Just started with Python myself but thought I'd have a go at a solution - came up with this:

#!/usr/bin/python2

import cv2
import numpy as np

file_name = "/tmp/signature.jpg" # your signature image...

image = cv2.imread(file_name, 1)
image = cv2.cvtColor(image, cv2.COLOR_BGR2RGBA)
# note: [R,G,B,255] below, so first 3 numbers [255,255,255] are your white 
# background pixels to be converted to RGBA setting of [0,0,0,0] (transparent)
image[np.all(image == [255, 255, 255, 255], axis=2)] = [0, 0, 0, 0]

cv2.imwrite("/tmp/signature-transparent.png", image)

This script will grab your signature.jpg, make a transparent background from all the white pixels it finds, then write it to signature.png.

Looks like this:

However it's not exactly clean around the edges! Anyone out there who can sort that?

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