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Optimized image downloads

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This commit is contained in:
Dylan 2022-05-26 15:01:12 +01:00
parent 2819b504a3
commit 4feb1b65d6
1 changed files with 30 additions and 16 deletions
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40
combineImg/__init__.py
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@ -1,11 +1,12 @@
import json
from pickletools import optimize from pickletools import optimize
from turtle import down
from weakref import finalize from weakref import finalize
from PIL import Image, ImageOps, ImageFilter from PIL import Image, ImageOps, ImageFilter
import requests from requests import get
from io import BytesIO from io import BytesIO
import io
import base64 import base64
from multiprocessing.pool import ThreadPool
from time import time as timer
# find the highest res image in an array of images # find the highest res image in an array of images
def findImageWithMostPixels(imageArray): def findImageWithMostPixels(imageArray):
@ -27,15 +28,21 @@ def getTotalImgSize(imageArray): # take the image with the most pixels, multiply
else: else:
return (maxImage.size[0] * 2, maxImage.size[1]*2) return (maxImage.size[0] * 2, maxImage.size[1]*2)
def scaleAllImagesToSameSize(imageArray,targetWidth,targetHeight,pad=True): # scale all images in the array to the same size, preserving aspect ratio def scaleImageIterable(args):
newImageArray = [] image = args[0]
for image in imageArray: targetWidth = args[1]
targetHeight = args[2]
pad=args[3]
if pad: if pad:
image = image.convert('RGBA') image = image.convert('RGBA')
newImg = ImageOps.pad(image, (targetWidth, targetHeight),color=(0, 0, 0, 0)) newImg = ImageOps.pad(image, (targetWidth, targetHeight),color=(0, 0, 0, 0))
else: else:
newImg = ImageOps.fit(image, (targetWidth, targetHeight)) # scale + crop newImg = ImageOps.fit(image, (targetWidth, targetHeight)) # scale + crop
newImageArray.append(newImg) return newImg
def scaleAllImagesToSameSize(imageArray,targetWidth,targetHeight,pad=True): # scale all images in the array to the same size, preserving aspect ratio
newImageArray = []
newImageArray=[scaleImageIterable([image,targetWidth,targetHeight,pad]) for image in imageArray]
return newImageArray return newImageArray
def blurImage(image, radius): def blurImage(image, radius):
@ -83,22 +90,29 @@ def saveImage(image, name):
# combine up to four images into a single image # combine up to four images into a single image
def genImage(imageArray): def genImage(imageArray):
combined = combineImages(imageArray, *getTotalImgSize(imageArray)) totalSize=getTotalImgSize(imageArray)
combinedBG = combineImages(imageArray, *getTotalImgSize(imageArray),False) combined = combineImages(imageArray, *totalSize)
combinedBG = combineImages(imageArray, *totalSize,False)
combinedBG = blurImage(combinedBG,50) combinedBG = blurImage(combinedBG,50)
finalImg = Image.alpha_composite(combinedBG,combined) finalImg = Image.alpha_composite(combinedBG,combined)
finalImg = ImageOps.pad(finalImg, findImageWithMostPixels(imageArray).size,color=(0, 0, 0, 0)) finalImg = ImageOps.pad(finalImg, findImageWithMostPixels(imageArray).size,color=(0, 0, 0, 0))
finalImg = finalImg.convert('RGB') finalImg = finalImg.convert('RGB')
return finalImg return finalImg
def downloadImage(url):
return Image.open(BytesIO(get(url).content))
def genImageFromURL(urlArray): def genImageFromURL(urlArray):
# this method avoids storing the images in disk, instead they're stored in memory # this method avoids storing the images in disk, instead they're stored in memory
# no cache means that they'll have to be downloaded again if the image is requested again # no cache means that they'll have to be downloaded again if the image is requested again
# TODO: cache? # TODO: cache?
imageArray = [] start = timer()
for url in urlArray: imageArray = ThreadPool(8).map(downloadImage,urlArray)
imageArray.append(Image.open(BytesIO(requests.get(url).content))) print(f"Images downloaded in: {timer() - start}s")
return genImage(imageArray) start = timer()
finalImg = genImage(imageArray)
print(f"Image generated in: {timer() - start}s")
return finalImg
def lambda_handler(event, context): def lambda_handler(event, context):
# TODO implement # TODO implement