Python如何将jpg图像修改大小并转换为png
作者：回炉重造P
这篇文章主要介绍了Python如何将jpg图像修改大小并转换为png问题,具有很好的参考价值,希望对大家有所帮助,如有错误或未考虑完全的地方,望不吝赐教
Python将jpg图像修改大小并转换为png
简单利用pillow库实现的大小与格式转换的脚本。
实现
import os
import PIL.Image as Image
def changeJpgToPng(w, h, path):
# 修改图像大小
image = Image.open(path)
image = image.resize((w, h), Image.ANTIALIAS)
# 将jpg转换为png
png_name = str(path)[0:-len('.jpg')] + '_min.png'
image.save(png_name)
print(png_name)
# 去白底
image = image.convert('RGBA')
img_w, img_h = image.size
color_white = (255, 255, 255, 255)
for j in range(img_h):
for i in range(img_w):
pos = (i, j)
color_now = image.getpixel(pos)
if color_now == color_white:
# 透明度置为0
color_now = color_now[:-1] + (0,)
image.putpixel(pos, color_now)
image.save(png_name)
if __name__ == '__main__':
t_w = 300
t_h = 150
dic = os.listdir('image')
for d in dic:
if d.count('.jpg') > 0:
changeJpgToPng(t_w, t_h, 'image/' + d)参考实现了去白底的功能，简单循环对比。
结构
Python批量实现jpg图片修改大小并转换为png(图像通道：RGB，适配KITTI数据集)
# python:批量实现jpg图片修改大小并转换为png
# author：zhou jinxing
import os
import PIL.Image as Image
def changeJpgToPng(w, h,srcPath,dstPath):
# 修改图像大小
image = Image.open(srcPath)
image = image.resize((w, h), Image.ANTIALIAS)
# 将jpg转换为png
png_name = str(dstPath)[0:-len('.jpg')] + '.png'
image.save(png_name)
print(png_name)
# 去白底
#image = image.convert('RGBA')
image = image.convert('RGB')
img_w, img_h = image.size
#color_white = (255, 255, 255, 255)
color_white = (255, 255, 255)
for j in range(img_h):
for i in range(img_w):
pos = (i, j)
color_now = image.getpixel(pos)
if color_now == color_white:
# 透明度置为0
color_now = color_now[:-1] + (0,)
image.putpixel(pos, color_now)
image.save(png_name)
if __name__ == '__main__':
t_w = 1242
t_h = 375
#srcPath = '/workspace/tlt-experiments/data_fire/image_2_jpg/'
#dstPath = '/workspace/tlt-experiments/data_fire/image_2_png/'
srcPath = '/workspace/tlt-experiments/data_fire/012/training/image_2/'
dstPath = '/workspace/tlt-experiments/data_fire/012/training/image_2_png/'
# filename_list = os.listdir('/workspace/tlt-experiments/data_fire/image_2_jpg')
# for d in dic:
# if d.count('.jpg') > 0:
# changeJpgToPng(t_w, t_h, 'image/' + d)
print("开始转换...")
filename_list = os.listdir('/workspace/tlt-experiments/data_fire/012/training/image_2')
for d in filename_list:
if d.count('.png') > 0:
changeJpgToPng(t_w, t_h,srcPath + d,dstPath + d)
pass
print("完成了...")总结
以上为个人经验，希望能给大家一个参考，也希望大家多多支持脚本之家。