TABLE_DETECTION/image.py

#!/usr/bin/env python3
# -*- coding: utf-8 -*-
"""
Created on Thu Sep 9 23:11:51 2020
image
@author: chineseocr
"""
import json
import base64
import random

import numpy as np
import six
import cv2
from PIL import Image
from numpy import cos,sin,pi
from matplotlib.colors import rgb_to_hsv, hsv_to_rgb


def plot_lines(img,lines,linetype=2):
    tmp = np.copy(img)
    for line in lines:
        p1,p2 = line
        cv2.line(tmp,(int(p1[0]),int(p1[1])),(int(p2[0]),int(p2[1])),(0,0,0),linetype,lineType=cv2.LINE_AA)
    
    return Image.fromarray(tmp)


def base64_to_PIL(string):
    try:
        # my own train data
        string = bytes(string, 'utf-8')

        base64_data = base64.b64decode(string)
        # with open('temp.jpg', 'wb') as f:
        #     f.write(base64_data)
        # print("base64_to_PIL")
        buf = six.BytesIO()
        buf.write(base64_data)
        buf.seek(0)
        img = Image.open(buf).convert('RGB')
        return img
    except Exception as e:
        print(e)
        return None


def read_json(p):
    with open(p) as f:
        jsonData = json.loads(f.read())
    shapes = jsonData.get('shapes')
    imageData = jsonData.get('imageData')
    lines = []
    labels = []
    for shape in shapes:
        lines.append(shape['points'])
        [x0, y0], [x1, y1] = shape['points']
        label = shape['label']
        if label == '0':
            if abs(y1-y0) > 500:
                label = '1'
            # else:
            #     print("image read_json y<50", x0, y0, x1, y1, label)
        elif label == '1':
            if abs(x1-x0) > 500:
                label = '0'
            # else:
            #     print("image read_json x<50", x0, y0, x1, y1, label)
                
        labels.append(label)
    img = base64_to_PIL(imageData)
    return img, lines, labels


def rotate(x, y, angle, cx, cy):
    """
    点(x,y) 绕(cx,cy)点旋转
    """
    angle = angle*pi/180
    x_new = (x-cx)*cos(angle) - (y-cy)*sin(angle)+cx
    y_new = (x-cx)*sin(angle) + (y-cy)*cos(angle)+cy
    return x_new, y_new


def box_rotate(box, angle=0, imgH=0, imgW=0):
    """
    对坐标进行旋转 逆时针方向 0\90\180\270,
    """
    x1, y1, x2, y2, x3, y3, x4, y4 = box[:8]
    if angle == 90:
        x1_, y1_ = y2, imgW-x2
        x2_, y2_ = y3, imgW-x3
        x3_, y3_ = y4, imgW-x4
        x4_, y4_ = y1, imgW-x1
        
    elif angle == 180:
        x1_, y1_ = imgW-x3, imgH-y3
        x2_, y2_ = imgW-x4, imgH-y4
        x3_, y3_ = imgW-x1, imgH-y1
        x4_, y4_ = imgW-x2, imgH-y2
        
    elif angle == 270:
        x1_, y1_ = imgH-y4, x4
        x2_, y2_ = imgH-y1, x1
        x3_, y3_ = imgH-y2, x2
        x4_, y4_ = imgH-y3, x3
    else:
        x1_, y1_, x2_, y2_, x3_, y3_, x4_, y4_ = x1, y1, x2, y2, x3, y3, x4, y4
        
    return (x1_, y1_, x2_, y2_, x3_, y3_, x4_, y4_)


def angle_transpose(p, angle, w, h):
    x, y = p
    if angle == 90:
        x, y = y, w-x
    elif angle == 180:
        x, y = w-x, h-y
    elif angle == 270:
        x, y = h-y, x
    return x, y


def img_argument(img, lines, labels, size=(512, 512)):
    w, h = img.size

    # 80%几率进行旋转-5~5度
    if np.random.randint(0, 100) > 80:
        degree = np.random.uniform(-5, 5)
    else:
        degree = 0
    # degree = np.random.uniform(-5,5)

    # 旋转线条
    newlines = []
    for line in lines:
        p1, p2 = line
        p1 = rotate(p1[0], p1[1], degree, w/2, h/2)
        p2 = rotate(p2[0], p2[1], degree, w/2, h/2)
        newlines.append([p1, p2])
    # img = img.rotate(-degree,center=(w/2,h/2),resample=Image.BILINEAR,fillcolor=(128,128,128))

    # 旋转图片
    img = img.rotate(-degree, center=(w/2, h/2), resample=Image.BILINEAR)

    # 随机选择90度倍数旋转
    angle = np.random.choice([0, 90, 180, 270], 1)[0]
    newlables = []

    # 旋转线条
    for i in range(len(newlines)):
        p1, p2 = newlines[i]
        p1 = angle_transpose(p1, angle, w, h)
        p2 = angle_transpose(p2, angle, w, h)
        newlines[i] = [p1, p2]

        # 旋转角度为90,270度时，横竖线的Label互换
        if angle in [90, 270]:
            if labels[i] == '0':
                newlables.append('1')
            else:
                newlables.append('0')
        else:
            newlables.append(labels[i])

    # 旋转图片
    if angle == 90:
        img = img.transpose(Image.ROTATE_90)
    elif angle == 180:
        img = img.transpose(Image.ROTATE_180)
    elif angle == 270:
        img = img.transpose(Image.ROTATE_270)
    
    return img, newlines, newlables


def fill_lines(img, lines, linetype=2):
    tmp = np.copy(img)
    for line in lines:
        p1, p2 = line
        cv2.line(tmp, (int(p1[0]), int(p1[1])), (int(p2[0]), int(p2[1])),
                 255, linetype, lineType=cv2.LINE_AA)
    return tmp


def get_img_label_origin(p,size,linetype=1):
    img,lines,labels = read_json(p)
    img,lines=img_resize_origin(img,lines,target_size=512,max_size=1024)
    img,lines,labels =img_argument(img,lines,labels,size)
    img,lines,labels=get_random_data(img,lines,labels, size=size)

    lines = np.array(lines)
    labels = np.array(labels)
    labelImg0 = np.zeros(size[::-1],dtype='uint8')
    labelImg1 = np.zeros(size[::-1],dtype='uint8')

    ind = np.where(labels=='0')[0]
    labelImg0 = fill_lines(labelImg0,lines[ind],linetype=linetype)
    ind = np.where(labels=='1')[0]
    labelImg1 = fill_lines(labelImg1,lines[ind],linetype=linetype)

    labelY = np.zeros((size[1],size[0],2),dtype='uint8')
    labelY[:,:,0] = labelImg0
    labelY[:,:,1] = labelImg1

    cv2.imshow("get_img_label", labelImg1)
    cv2.waitKey(0)
    cv2.imshow("get_img_label", labelImg0)
    cv2.waitKey(0)

    labelY = labelY>0
    return np.array(img),lines,labelY


def gen_origin(paths,batchsize=2,linetype=2):
    num =len(paths)
    i=0
    while True:
        #sizes = [512,512,512,512,640,1024] ##多尺度训练
        #size = np.random.choice(sizes,1)[0]
        size = 640

        X = np.zeros((batchsize,size,size,3))
        Y = np.zeros((batchsize,size,size,2))
        for j in range(batchsize):
            if i>=num:
                i=0
                np.random.shuffle(paths)
            p = paths[i]
            i+=1

            #linetype=2
            img,lines,labelImg=get_img_label_origin(p,size=(size,size),linetype=linetype)

            cv2.imshow("gen", img)
            cv2.waitKey(0)
            print("gen image size", img.shape)

            X[j] = img
            Y[j] =  labelImg

        yield  X,Y


def get_img_label(p, size, linetype=1):
    # 读取json格式数据
    img, lines, labels = read_json(p)
    # if img.size[1] > 1200:
    #     return np.array([]), np.array([]), np.array([]), np.array([])

    height, width = size
    # width, height = img.size
    # size = np.array(img).shape[:-1]
    # print("get_img_label origin image_PIL size", img.size)
    # 图片缩放
    img, lines = img_resize_by_padding_crop(img, lines, (height, width))
    # img, lines = img_resize(img, lines, target_size=size, max_size=1024)
    # print("get_img_label train image_PIL size", img.size)
    # print("get_img_label train image_np shape", np.array(img).shape)
    # 图片增强(各种角度旋转)
    # img, lines, labels = img_argument(img, lines, labels, size)
    # print("shape3", np.array(img).shape)
    # 图片轻微缩放 + 图片失真
    # img, lines, labels = get_random_data(img, lines, labels, size=size)
    
    lines = np.array(lines)
    labels = np.array(labels)
    # size (640, 640) 将size的两个值倒过来
    # labelImg0 = np.zeros(size[::-1], dtype='uint8')
    # labelImg1 = np.zeros(size[::-1], dtype='uint8')

    labelImg0 = np.zeros((height, width), dtype='uint8')
    labelImg1 = np.zeros((height, width), dtype='uint8')
    # print("get_img_label np zero shape", labelImg0.shape, (height, width))

    # 在空图片上画线
    ind = np.where(labels == '0')[0]
    labelImg0 = fill_lines(labelImg0, lines[ind], linetype=linetype)
    ind = np.where(labels == '1')[0]
    labelImg1 = fill_lines(labelImg1, lines[ind], linetype=linetype)
    # print("label image shape", labelImg0.shape, labelImg1.shape)

    # 将只有横竖线的图片堆叠
    labelY = np.zeros((height, width, 2), dtype='uint8')
    labelY[:, :, 0] = labelImg0
    labelY[:, :, 1] = labelImg1

    # cv2.imshow("get_img_label", labelImg1)
    # cv2.waitKey(0)
    # cv2.imshow("get_img_label1", labelImg0)
    # cv2.waitKey(0)
    # print("get_img_label label col size", labelImg1.shape)
    # print("get_img_label label row size", labelImg0.shape)

    # 对每个像素点进行二分类
    labelY = labelY > 0

    return np.array(img), lines, labelY, (height, width)


def get_img_label1(p, linetype=1):
    # 读取json格式数据
    img, lines, labels = read_json(p)

    width, height = img.size

    lines = np.array(lines)
    labels = np.array(labels)

    labelImg0 = np.zeros((height, width), dtype='uint8')
    labelImg1 = np.zeros((height, width), dtype='uint8')

    # 在空图片上画线
    ind = np.where(labels == '0')[0]
    labelImg0 = fill_lines(labelImg0, lines[ind], linetype=linetype)
    ind = np.where(labels == '1')[0]
    labelImg1 = fill_lines(labelImg1, lines[ind], linetype=linetype)

    # 将只有横竖线的图片堆叠
    labelY = np.zeros((height, width, 2), dtype='uint8')
    labelY[:, :, 0] = labelImg0
    labelY[:, :, 1] = labelImg1

    cv2.imshow("get_img_label", labelImg1)
    cv2.waitKey(0)
    cv2.imshow("get_img_label", labelImg0)
    cv2.waitKey(0)

    # 对每个像素点进行二分类
    labelY = labelY > 0

    return np.array(img), lines, labelY, (height, width)
    

def rand(a=0., b=1.):
    # rand(): [0-1)
    return np.random.rand()*(b-a) + a


def get_random_data(image, lines, labels, size=(1024, 1024), jitter=.3,
                    hue=.1, sat=1.5, val=1.5):
    """
        random preprocessing for real-time data augmentation
    """
    iw, ih = image.size
    
    # resize image
    w, h = size
    new_ar = w/h * rand(1-jitter, 1+jitter) / rand(1-jitter, 1+jitter)
    # scale = rand(.2, 2)
    scale = rand(0.2, 3)
    if new_ar < 1:
        nh = int(scale*h)
        nw = int(nh*new_ar)
    else:
        nw = int(scale*w)
        nh = int(nw/new_ar)
    image = image.resize((nw, nh), Image.BICUBIC)

    # 将原图粘贴到另一张空白图上
    dx = int(rand(0, w-nw))
    dy = int(rand(0, h-nh))
    new_image = Image.new('RGB', (w, h), (128, 128, 128))
    new_image.paste(image, (dx, dy))
    image = new_image

    # 图片失真
    hue = rand(-hue, hue)
    sat = rand(1, sat) if rand() < .5 else 1/rand(1, sat)
    val = rand(1, val) if rand() < .5 else 1/rand(1, val)
    x = rgb_to_hsv(np.array(image)/255.)
    x[..., 0] += hue
    x[..., 0][x[..., 0] > 1] -= 1
    x[..., 0][x[..., 0] < 0] += 1
    x[..., 1] *= sat
    x[..., 2] *= val
    x[x > 1] = 1
    x[x < 0] = 0
    # numpy array, 0 to 1
    image_data = hsv_to_rgb(x)
    N = len(lines)
    for i in range(N):
        p1, p2 = lines[i]
        p1 = p1[0]*nw/iw+dx, p1[1]*nh/ih + dy
        p2 = p2[0]*nw/iw+dx, p2[1]*nh/ih + dy
        lines[i] = [p1, p2]
    return image_data, lines, labels


def gen2(paths, batchsize=2, linetype=2):
    num = len(paths)
    i = 0
    while True:
        # 多尺度训练
        sizes = [1152, 1024, 1280, 896, 768, 640, 1024]
        # size = np.random.choice(sizes, 1)[0]
        # height = np.random.choice(sizes, 1)[0]
        # width = int(height/1.4)
        heights = [1024, 896, 768, 640]
        widths = [768, 640, 512, 384]
        height = np.random.choice(heights, 1)[0]
        width = np.random.choice(widths, 1)[0]
        # height = 1024
        # width = 768
        # size = (1024, 512)
        
        X = np.zeros((batchsize, height, width, 3))
        Y = np.zeros((batchsize, height, width, 2))
        for j in range(batchsize):
            if i >= num:
                i = 0
                np.random.shuffle(paths)
            p = paths[i]
            i += 1
            
            # linetype=2
            print("gen input size", (width, height))
            img, lines, labelImg = get_img_label(p, size=(width, height),
                                                 linetype=linetype)

            # 高斯模糊
            # sigmaX = random.randint(1, 10)
            # sigmaY = random.randint(1, 10)
            # img = cv2.GaussianBlur(img, (5, 5), sigmaX, sigmaY)

            cv2.imshow("gen", img)
            cv2.waitKey(0)
            print("gen image size", img.shape)

            X[j] = img
            Y[j] = labelImg
        
        yield X, Y



def gen(paths, batchsize=2, linetype=2):
    num = len(paths)

    i = 0
    while True:
        # 多尺度训练
        sizes = [1152, 1024, 1280, 896, 768, 640, 1024]
        # size = np.random.choice(sizes, 1)[0]
        # height = np.random.choice(sizes, 1)[0]
        # width = int(height/1.4)
        # heights = [1024, 896, 768, 640, 512, 384, 256, 128]
        # widths = [1024, 896, 768, 640, 512, 384, 256, 128]
        heights = [3008, 2944, 2880, 2816, 2752, 2688, 2624, 2560, 2496, 2432, 2368,
                   2304, 2240, 2176, 2112, 2048, 1984, 1920, 1856, 1792, 1728, 1664,
                   1600, 1536, 1472, 1408, 1344, 1280, 1216, 1152, 1088, 1024, 960,
                   896, 832, 768, 704, 640, 576, 512]
        widths = [2048, 1984, 1920, 1856, 1792, 1728, 1664,
                  1600, 1536, 1472, 1408, 1344, 1280, 1216, 1152, 1088, 1024, 960,
                  896, 832, 768, 704, 640, 576, 512]
        height = np.random.choice(heights, 1)[0]
        width = np.random.choice(widths, 1)[0]
        # height = 1024
        # width = 768
        # size = (1024, 512)
        # print("gen batch shape", height, width)
        X = np.zeros((batchsize, height, width, 3))
        Y = np.zeros((batchsize, height, width, 2))

        for j in range(batchsize):
            if i >= num:
                i = 0
                np.random.shuffle(paths)
            p = paths[i]
            i += 1

            # linetype=2
            # print("gen input size", (height, width))
            img, lines, labelImg, size = get_img_label(p, size=(height, width),
                                                       linetype=linetype)

            # if not img.any():
            #     print("image too large, jump")
            #     continue

            # height, width = size
            # X = np.zeros((batchsize, height, width, 3))
            # Y = np.zeros((batchsize, height, width, 2))

            # if_blur = np.random.choice([0, 1], 1)[0]
            # if if_blur:
            #     # 高斯模糊
            #     sigmaX = random.randint(1, 3)
            #     sigmaY = random.randint(1, 3)
            #     img = cv2.GaussianBlur(img, (5, 5), sigmaX, sigmaY)

            # cv2.imshow("gen", img)
            # cv2.waitKey(0)
            # print("gen image size", img.shape)

            # cv2.imshow("gen", labelImg[:, :, 0])
            # cv2.waitKey(0)
            # print("gen label image size", labelImg[:, :, 0])

            X[j] = img
            Y[j] = labelImg

        yield X, Y


def gen1(paths, batchsize=2, linetype=2):
    num = len(paths)

    i = 0
    while True:
        batchsize = 1
        for j in range(batchsize):
            if i >= num:
                i = 0
                np.random.shuffle(paths)
            p = paths[i]
            i += 1

            img, lines, labelImg, size = get_img_label(p, linetype=linetype)

            height, width = size
            X = np.zeros((batchsize, height, width, 3))
            Y = np.zeros((batchsize, height, width, 2))

            if_blur = np.random.choice([0, 1], 1)[0]
            if if_blur:
                # 高斯模糊
                sigmaX = random.randint(1, 3)
                sigmaY = random.randint(1, 3)
                img = cv2.GaussianBlur(img, (5, 5), sigmaX, sigmaY)

            print("gen image size", img.shape)
            cv2.imshow("gen", img)
            cv2.waitKey(0)


            # cv2.imshow("gen", labelImg[:, :, 0])
            # cv2.waitKey(0)
            # print("gen label image size", labelImg[:, :, 0].shape)

            X[j] = img
            Y[j] = labelImg

        yield X, Y
            

def img_resize(im, lines, target_size, max_size=None):
        w, h = im.size
        w_t, h_t = target_size
        print("img_resize", im.size, target_size)
        # im_size_min = np.min(im.size)
        # im_size_max = np.max(im.size)
        
        im_scale_w = float(w_t)/float(w)
        im_scale_h = float(h_t)/float(h)
                    
        im = im.resize((int(w*im_scale_w), int(h*im_scale_h)), Image.BICUBIC)
        N = len(lines)
        for i in range(N):
            p1, p2 = lines[i]
            p1 = p1[0]*im_scale_w, p1[1]*im_scale_h
            p2 = p2[0]*im_scale_w, p2[1]*im_scale_h
            lines[i] = [p1, p2]
            
        return im, lines


def img_resize_origin(im,lines,target_size=600,max_size=1500):
    w,h = im.size
    im_size_min = np.min(im.size)
    im_size_max = np.max(im.size)

    im_scale = float(target_size)/float(im_size_min)
    if max_size is not None:
        if np.round(im_scale * im_size_max) > max_size:
            im_scale = float(max_size)/float(im_size_max)

    im = im.resize((int(w*im_scale),int(h*im_scale)),Image.BICUBIC)
    N = len(lines)
    for i in range(N):
        p1,p2 = lines[i]
        p1 = p1[0]*im_scale,p1[1]*im_scale
        p2 = p2[0]*im_scale,p2[1]*im_scale
        lines[i] = [p1,p2]

    return im, lines


def img_resize_by_padding_crop(im, lines, target_size):
    w, h = im.size
    h_t, w_t = target_size
    # print("img_resize_by_padding_crop", im.size, target_size)

    # PIL -> CV2
    img = cv2.cvtColor(np.asarray(im), cv2.COLOR_RGB2BGR)
    # print("img_resize_by_padding_crop image_np shape0", img.shape)

    # 图像边缘扩充/裁剪
    change_w_flag = 0
    change_h_flag = 0
    if w_t >= w and h_t >= h:
        change_height = int((h_t - h)/2)
        change_width = int((w_t - w)/2)
        img = cv2.copyMakeBorder(img, change_height, change_height, change_width,
                                 change_width, cv2.BORDER_CONSTANT, value=(255, 255, 255))
        change_w_flag = 1
        change_h_flag = 1
        # print("img_resize_by_padding_crop 1 1")
    elif w_t >= w:
        change_width = int((w_t - w)/2)
        change_height = int((h - h_t)/2)
        img = cv2.copyMakeBorder(img, 0, 0, change_width,
                                 change_width, cv2.BORDER_CONSTANT, value=(255, 255, 255))
        img = img[change_height:h-change_height, :]
        change_w_flag = 1
        change_h_flag = -1
        # print("img_resize_by_padding_crop 1 -1")
    elif h_t >= h:
        change_height = int((h_t - h)/2)
        change_width = int((w - w_t)/2)
        img = cv2.copyMakeBorder(img, change_height, change_height, 0,
                                 0, cv2.BORDER_CONSTANT, value=(255, 255, 255))
        img = img[:, change_width:w-change_width]
        change_w_flag = -1
        change_h_flag = 1
        # print("img_resize_by_padding_crop -1 1")
    else:
        if abs(h - h_t) % 2 != 0:
            change_height = int((h - h_t)/2)
            change_height += 1
        else:
            change_height = int((h - h_t)/2)

        if abs(w - w_t) % 2 != 0:
            change_width = int((w - w_t)/2)
            change_width += 1
        else:
            change_width = int((w - w_t)/2)

        img = img[change_height:h-change_height, change_width:w-change_width]
        change_w_flag = -1
        change_h_flag = -1
    #     print("img_resize_by_padding_crop -1 -1")
    # print("img_resize_by_padding_crop image_np shape1", img.shape)

    # image shape 和 target大小不同
    if img.shape[0] < h_t:
        img = cv2.copyMakeBorder(img, h_t-img.shape[0], 0, 0,
                                 0, cv2.BORDER_CONSTANT, value=(255, 255, 255))
    if img.shape[1] < w_t:
        img = cv2.copyMakeBorder(img, 0, 0, w_t-img.shape[1],
                                 0, cv2.BORDER_CONSTANT, value=(255, 255, 255))

    if img.shape[0] > h_t:
        img = img[:h_t, :, :]

    if img.shape[1] > w_t:
        img = img[:, :w_t, :]

    # print("img_resize_by_padding_crop image_np shape2", img.shape)

    # CV2 -> PIL
    im = Image.fromarray(cv2.cvtColor(img, cv2.COLOR_BGR2RGB))

    N = len(lines)
    for i in range(N):
        p1, p2 = lines[i]
        p1 = p1[0] + change_w_flag * change_width, p1[1] + change_h_flag * change_height
        p2 = p2[0] + change_w_flag * change_width, p2[1] + change_h_flag * change_height
        lines[i] = [p1, p2]

    return im, lines


if __name__ == '__main__':
    _list = []
    for i in range(100, 1, -1):
        _list.append(i*64)
    print(_list)