1、用Python玩转图片处理
class ImageUtils:
""" 图片处理工具 """
def __init__(self, source_dir, target_dir):
self.source_dir = source_dir
self.target_dir = target_dir
def thumbnail(self, filename, percent=0.5):
'缩略图'
im = Image.open(os.path.join(self.source_dir, filename))
w, h = im.size
print('Original image size: %sx%s' % (w, h))
im.thumbnail((int(w*percent), int(h*percent)))
print('Thumbnail image to: %sx%s' % (int(w*percent), int(h*percent)))
output = os.path.join(self.target_dir, filename.split('.')[0]+'-thumbnail.jpg')
im.save(output, 'jpeg')
def resize(self, filename, horizontal_ratio=0.5, vertical_ratio=0.5):
'调整大小'
im = Image.open(os.path.join(self.source_dir, filename))
w, h = im.size
print('Original image size: %sx%s' % (w, h))
im_size = im.resize((int(w*horizontal_ratio), int(h*vertical_ratio)))
print('Resize image to: %sx%s' % (int(w*horizontal_ratio), int(h*vertical_ratio)))
output = os.path.join(self.target_dir, filename.split('.')[0]+'-resize.jpg')
im_size.save(output, 'jpeg')
def enhance(self, filename, enhance_ratio=1.3):
'图片对比度增强'
im = Image.open(os.path.join(self.source_dir, filename))
enh = ImageEnhance.Contrast(im)
print(f'图像对比度增强: {enhance_ratio}倍')
output = os.path.join(self.target_dir, filename.split('.')[0]+'-enhance.jpg')
enh.enhance(enhance_ratio).save(output, 'jpeg')
def region(self, filename, snap=(0.1, 0.1, 0.9, 0.9)):
'截取一块区域'
im = Image.open(os.path.join(self.source_dir, filename))
w, h = im.size
box = (int(w*snap[0]), int(h*snap[1]), int(w*snap[2]), int(h*snap[3]))
print(f'图像截取区域: {box}')
region = im.crop(box)
output = os.path.join(self.target_dir, filename.split('.')[0]+'-region.jpg')
region.save(output, 'jpeg')
def rotate(self, filename, angle=0):
'旋转图片，翻转'
im = Image.open(os.path.join(self.source_dir, filename))
print(f'图像旋转: {angle}°')
output = os.path.join(self.target_dir, filename.split('.')[0]+'-rotate.jpg')
im.rotate(angle).save(output, 'jpeg')
def flip(self, filename, horizontal=False, vertical=False):
'翻转'
im = Image.open(os.path.join(self.source_dir, filename))
if horizontal:
print('图像水平翻转')
im = im.transpose(Image.FLIP_LEFT_RIGHT)
if vertical:
print('图像上下翻转')
im = im.transpose(Image.FLIP_TOP_BOTTOM)
output = os.path.join(self.target_dir, filename.split('.')[0]+'-flip.jpg')
im.save(output, 'jpeg')
def add_logo(self, filename, logo_file):
'添加水印'
im_logo = Image.open(os.path.join(self.source_dir, logo_file))
logo_width, logo_height = im_logo.size
im_target = Image.open(os.path.join(self.source_dir, filename))
target_width, target_height = im_target.size
im_copy = im_target.copy()
print('图像添加水印')
im_copy.paste(im_logo, (target_width-logo_width, target_height-logo_height), im_logo)
output = os.path.join(self.target_dir, filename.split('.')[0]+'-add_logo.jpg')
im_copy.save(output, 'jpeg')
def new_image(self, text='Text'):
'创建新图片'
im_new = Image.new('RGBA', (400, 400), 'white')
print('创建新图片')
pic = ImageDraw.Draw(im_new)
print('图片添加文字')
pic.text((50, 50), text, fill='blue')
output = os.path.join(self.target_dir, 'new_image.png')
im_new.save(output)
def msyh_font(self, text='文字'):
'设置字体'
im_new = Image.new('RGBA', (400, 400), 'white')
pic = ImageDraw.Draw(im_new)
fonts_path = r'D:\VSCode\xuan_demo_v0302\fonts\msyh.ttf'
msyh = ImageFont.truetype(fonts_path, 40)
print('文字格式为微软雅黑')
pic.text((50, 50), text, fill='blue', font=msyh)
output = os.path.join(self.target_dir, 'new_image_msyh.png')
im_new.save(output)
2、导出文件列表到Excel文件
class ImageSystem:
""" 图片列表生成excel文件系统"""
def __init__(self, dirname):
self.dirpath = dirname
def listfile(self, img_type='.jpg'):
'获取指定路径下所有的图片文件, 返回列表'
img_File_List = os.listdir(self.dirpath) # 图片列表
image_list = []
for filename in img_File_List:
filepath = os.path.join(self.dirpath, filename) # 图片的绝对路径
if os.path.isdir(filepath):
self.listfile(filepath)
print(filepath)
else:
if os.path.isfile(filepath) and filename.lower().endswith(img_type):
print(os.path.join(self.dirpath, filename))
image_list.append(os.path.join(self.dirpath, filename))
return image_list
def xlsx_create(self, image_list, filename='Workbook.xlsx'):
'创建excel表格'
wb = Workbook()
ws = wb.active
ws['A1'] = '文件名：'
for s in image_list:
ws.append([s, self.get_FileSize(s)])
ws.append([datetime.datetime.now()])
output = os.path.join(r'D:\VSCode\xuan_demo_v0302\test', filename)
print('创建excel表格')
wb.save(output)
def get_FileSize(self, filename):
'获取文件的大小,结果保留两位小数，单位为kb'
fsize = os.path.getsize(filename)
fsize = fsize/float(1024)
return f'{round(fsize, 2)} kb'
3、运行
def main():
source_dir = r'D:\VSCode\xuan_demo_v0302\image'
target_dir = r'D:\VSCode\xuan_demo_v0302\test'
test_image = ImageUtils(source_dir, target_dir)
test_image.thumbnail('scenery.jpg', 0.9)
test_image.resize('scenery.jpg', 0.9, 0.5)
test_image.enhance('scenery.jpg', 1.5)
test_image.region('scenery.jpg', snap=(0.2, 0.2, 0.55, 0.5555))
test_image.rotate('scenery.jpg', angle=10)
test_image.flip('scenery.jpg', horizontal=True, vertical=True)
test_image.add_logo('scenery.jpg', 'logo.png')
test_image.new_image()
test_image.msyh_font()
image_file = ImageSystem(source_dir)
image_list = image_file.listfile()
image_file.xlsx_create(image_list, 'image_list.xlsx')
if __name__ == "__main__":
main()
分享题目：用Python玩转图片处理，并导出文件列表到Excel文件
转载源于：
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