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Python如何將jpg圖像修改大小并轉(zhuǎn)換為png

更新時間：2023年09月11日 15:21:54 作者：回爐重造P

這篇文章主要介紹了Python如何將jpg圖像修改大小并轉(zhuǎn)換為png問題,具有很好的參考價值,希望對大家有所幫助,如有錯誤或未考慮完全的地方,望不吝賜教

Python將jpg圖像修改大小并轉(zhuǎn)換為png

簡單利用pillow庫實現(xiàn)的大小與格式轉(zhuǎn)換的腳本。

實現(xiàn)

import os
import PIL.Image as Image
def changeJpgToPng(w, h, path):
    # 修改圖像大小
    image = Image.open(path)
    image = image.resize((w, h), Image.ANTIALIAS)
    # 將jpg轉(zhuǎn)換為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:
                # 透明度置為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)

參考實現(xiàn)了去白底的功能，簡單循環(huán)對比。

結(jié)構(gòu)

Python批量實現(xiàn)jpg圖片修改大小并轉(zhuǎn)換為png(圖像通道：RGB，適配KITTI數(shù)據(jù)集)

# python:批量實現(xiàn)jpg圖片修改大小并轉(zhuǎn)換為png
# author：zhou jinxing
import os
import PIL.Image as Image
def changeJpgToPng(w, h,srcPath,dstPath):
    # 修改圖像大小
    image = Image.open(srcPath)
    image = image.resize((w, h), Image.ANTIALIAS)
    # 將jpg轉(zhuǎn)換為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:
                # 透明度置為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("開始轉(zhuǎn)換...")
    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...")