在PIL中合併並保存圖像Python

Question

我有兩個圖像文件夾，我試圖從每個文件夾中的所有切片構建一個大圖像。我需要在文件夾之間交替來構建圖像。例如，第一個切片來自文件夾1，第二個切片來自文件夾2，第三個來自文件夾1等。我有單個文件夾中按文件名排序的文件，所以我試圖遍歷文件夾併爲圖像添加一個新條。代碼運行，但它似乎並沒有保存複合圖像。我是PIL新手，所以我確信這很簡單，但您的幫助表示感謝。謝謝！

def merge_images(file1, file2): 
    """Merge two images into one, displayed above and below 
    :param file1: path to first image file 
    :param file2: path to second image file 
    :return: the merged Image object 
    """ 

    if file1.startswith('.'): 
     return None 

    image1 = Image.open(file1) 
    image2 = Image.open(file2) 

    (width1, height1) = image1.size 
    (width2, height2) = image2.size 

    result_width = width1 + width2 
    result_height = max(height1, height2) 

    result = Image.new('RGB', (result_width, result_height)) 
    result.paste(im=image1, box=(0, 0)) 
    result.paste(im=image2, box=(0, height1)) 

    return result 

imageCounter = 0 
firstPass = True 
compImage = Image.new('RGBA', img.size, (0,0,0,0)) 

for i in range(len(boundingBoxes)+1): 
    if firstPass: 
     compImage = merge_images('./image_processing/'+ os.listdir('./image_processing/')[imageCounter], 
     './img_patches/outputs/'+os.listdir('./img_patches/outputs/')[imageCounter]) 


     if compImage is not None: 
      firstPass = False 

      compImage.save('./image_processing/compImage.jpg') 


    else: 
     compImage = merge_images('./image_processing/compImage.jpg','./image_processing/'+ os.listdir('./image_processing/')[imageCounter]) 

     compImage.save('./image_processing/compImage.jpg') 
     compImage = merge_images('./image_processing/compImage.jpg','./img_patches/outputs/'+ os.listdir('./img_patches/outputs/')[imageCounter]) 

     compImage.save('./image_processing/compImage.jpg') 

    imageCounter = imageCounter + 1 

Answer 1

你必須告訴PIL保存圖像：

for i in range(len(boundingBoxes)+1): 
    if firstPass: 
     compImage = merge_images('./image_processing/'+ os.listdir('./image_processing/')[imageCounter], 
     './img_patches/outputs/'+os.listdir('./img_patches/outputs/')[imageCounter]) 
     compImage.save(open('output/{}.png'.format(imageCounter), 'w'))