前言
日常生活中，手殘黨們經(jīng)常會(huì)把一些照片拍歪，比如拍個(gè)證件、試卷、PPT什么的，
比如下面這本書的封面原本是個(gè)矩形，隨手一拍就成了不規(guī)則四邊形
想要把它變成規(guī)則的矩形，有什么辦法呢？
你一定想到了 PS，因?yàn)榫W(wǎng)上很多教程就是這么教的
打開PS
可是這樣手工的調(diào)整數(shù)值實(shí)在是費(fèi)勁喲！！
下面我們來寫個(gè)程序，自動(dòng)將圖片恢復(fù)到任意矩形！
程序?qū)崿F(xiàn)
1. 打開圖片并顯示
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import cv2 as cvimport numpy as nppath = './book.jpg'src = cv.imread(path)def get_window_size(src, bound=600): h,w = src.shape[0], src.shape[1] if h > w: h, w = bound, int(w*bound/h) else: h, w = int(h*bound/w), bound return (h, w)h, w = get_window_size(src)win_name = 'RecAdjust'cv.namedWindow(win_name, cv.WINDOW_NORMAL)cv.resizeWindow(win_name, width=w, height=h)cv.imshow(win_name, src)cv.waitKey(0)cv.destroyAllWindows() |
2. 在圖片中標(biāo)記四個(gè)角點(diǎn)
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src_copy = src.copy()class Indexer: def __init__(self, bound=4): self.id = 0 self.bound=bound def get_id(self): self.id = (self.id+1)%self.bound return (self.id-1)%self.bound+1def on_EVENT_LBUTTONDOWN(event, x, y, flags, param): if event == cv.EVENT_LBUTTONDOWN: img = param['src'] win_name = param['window'] indexer = param['indexer'] points = param['points'] curr_id = indexer.get_id() points.append((x,y)) print('第{}個(gè)頂點(diǎn): ({},{})'.format(curr_id, x, y)) cv.circle(img, (x, y), 10, (0, 0, 255), thickness = 2) cv.putText( img, str(curr_id), # 文字 (x, y), # 坐標(biāo) cv.FONT_HERSHEY_PLAIN, 5, # 字號(hào) (0,0,255), # 字體顏色 thickness = 2 # 粗細(xì) ) cv.imshow(win_name, img)points = []indexer = Indexer()win_name = 'RecAdjust'cv.namedWindow(win_name, cv.WINDOW_NORMAL)cv.resizeWindow(win_name, width=w, height=h)cv.imshow(win_name, src)cv.setMouseCallback(win_name, on_EVENT_LBUTTONDOWN, param={'src':src,'window':win_name, 'indexer':indexer, 'points':points})cv.waitKey(0)cv.destroyAllWindows()print(points) |
3. 設(shè)定輸出矩形大小
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# W = int(input('輸出圖片寬度:'))# H = int(input('輸出圖片高度:'))W,H = 600, 800target_points = [(0,0),(W,0),(W,H),(0,H)] |
4. 求解透視變換矩陣
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points, target_points = np.array(points, dtype=np.float32), np.array(target_points, dtype=np.float32)M = cv.getPerspectiveTransform(points, target_points)print('透視變換矩陣:',M) |
5. 透視變換并保存圖片
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result = cv.warpPerspective(src_copy, M, (0, 0))result = result[:H, :W]win_name = 'Result'cv.namedWindow(win_name, cv.WINDOW_NORMAL)cv.resizeWindow(win_name, width=W, height=H)cv.imshow(win_name, result)cv.waitKey(0)cv.destroyAllWindows()output_file = 'result.jpg'cv.imwrite(output_file, result) |
結(jié)果如下
結(jié)果沒有想象的完美，是因?yàn)闀姆饷嬉呀?jīng)不是一個(gè)平面了，書角翹起。。。
如果圖片中的矩形在一個(gè)平面上的話，效果還是挺不錯(cuò)的！！
完整代碼下載
可關(guān)注后免費(fèi)下載喔：https://download.csdn.net/download/itnerd/12819535
總結(jié)
到此這篇關(guān)于利用Python將圖片中扭曲矩形復(fù)原的文章就介紹到這了,更多相關(guān)Python圖片扭曲矩形復(fù)原內(nèi)容請(qǐng)搜索服務(wù)器之家以前的文章或繼續(xù)瀏覽下面的相關(guān)文章希望大家以后多多支持服務(wù)器之家！
原文鏈接：https://blog.csdn.net/itnerd/article/details/108429553
