Python批量裁剪
zstar-_ 人气:0需求
我的需求是批量裁剪某一文件夹下的所有图片,并指定裁剪宽高。
思路
1、 先使用PIL.Image.size
获取输入图片的宽高。
2、宽高除以2得到中心点坐标
3、根据指定宽高,以中心点向四周拓展
4、调用PIL.Image.crop
完成裁剪
程序
import os from PIL import Image def crop(input_img_path, output_img_path, crop_w, crop_h): image = Image.open(input_img_path) x_max = image.size[0] y_max = image.size[1] mid_point_x = int(x_max / 2) mid_point_y = int(y_max / 2) right = mid_point_x + int(crop_w / 2) left = mid_point_x - int(crop_w / 2) down = mid_point_y + int(crop_h / 2) up = mid_point_y - int(crop_h / 2) BOX_LEFT, BOX_UP, BOX_RIGHT, BOX_DOWN = left, up, right, down box = (BOX_LEFT, BOX_UP, BOX_RIGHT, BOX_DOWN) crop_img = image.crop(box) crop_img.save(output_img_path) if __name__ == '__main__': dataset_dir = "cut" # 图片路径 output_dir = 'out' # 输出路径 crop_w = 300 # 裁剪图片宽 crop_h = 300 # 裁剪图片高 # 获得需要转化的图片路径并生成目标路径 image_filenames = [(os.path.join(dataset_dir, x), os.path.join(output_dir, x)) for x in os.listdir(dataset_dir)] # 转化所有图片 for path in image_filenames: crop(path[0], path[1], crop_w, crop_h)
测试
裁剪前:
裁剪后:
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