I need to create pictures for my website in automatical way.
IMAGE GENERATOR
1. I will create some basic background images for each category.
1.2. I'll create backgrounds with LibreOffice Draw. Export settings from LibreOffice Draw: .png, width: 555, compress:9, resolution:555, checkboxes: unchecked/
1.3. Try to use OfficeLibre Draw API with Python if it is possible. Unnable to do that.
1.4. Take images from LibreOffice draw gallery /usr/lib/libreoffice/share/gallery // I have to combine 3 random images then change the image randomly. And decrease size of an image.
OPEN CV & PIL
1.5. addWeighted function just blends images. It doesn't suit well for my purposes. I need insert one image into an another. // But it is possible to make two copies of one image -> add watermark into second copy -> then blend with original image with addWeighted // It works well
cv2.addWeighted(ov 0.5, ou, 0.5, 0, ou) // ov is a copy of ou but with inserted image.
1.5.1. There is an easy way to insert one cv2 image into another (so called alpha blending): img[50:150,30:90]=img2[0:100,0:60] // But I've faced the problem it doesn't take into an account the image's transparency.
1.5.2. Try to save png with interlaced mode enabled. // Doesn't help
1.5.3. While save png uncheck interlaced and save transparency options. // Doesn't help
1.5.4. Save as tif. // Doesn't help
1.5.5. Save as png without compression. // Doesn't help
1.5.6. I will use PIL library for this purpose. It works without any problems.
from PIL import Image
b = Image.open(r'/home/.../static/image/Blockchain/background.jpg')
a = Image.open(r'/home/.../static/image/Blockchain/Bitcoin/1.png')
b.paste(a, (0,0), mask=a)
b.show()
1.5.7. My gallery files are .svg I have to convert them into .png
1.5.7.1. I will try to use cairosvg package. To install $ pip3 install cairosvg
import cairosvg
cairosvg.svg2png(url='/home/.../_gallery/arrows/A01-Arrow-Gray-Left.svg', write_to='/home/.../Blockchain/Bitcoin/2.png')
1.5.7.2. Now I need a script to convert hundreds of files from svg to png.
import os
import cairosvg
d='/directory/myimages/'
for f in os.listdir(d):
if os.path.isfile(d+'/'+f) and f.endswith(".svg"):
n = f.split('.svg')[0]
cairosvg.svg2png(url=d+'/'+n+'.svg',write_to=d+'/'+n+'.png')
1.5.8. I need random generator to set random position for inserted images. // import random -> random.random() It doesn't need any seeds.
SCRIPT
1.6. Final script:
import os
from PIL import Image
from PIL import ImageFilter
from PIL import ImageEnhance
from PIL import ImageOps
import random
import pexpect # To use linux command from python
#1.Take user input. Which subcategory new article belongs.
subcategory = "joomla" # TODO Integrate with database
nm = "Petya2" # TODO Take name from database. Article name. Get from database
#2.Then I have to get category which subcategory belongs.
category = "" # Is a main category name which we are looking for.
local_dir = "/home/.../eclipse-workspace/django001/outleys/static/image/" #Set the Base loca directory with images
for ctg in os.listdir(local_dir) : # Get list of categories ,ctg is the top level category
if os.path.isdir(local_dir+ctg) and category=='':
for k in os.listdir(local_dir+ctg): # k is subactegory
if os.path.isdir(local_dir+ctg+"/"+k) and k==subcategory: # Iterate over all subcategories until match
category = ctg # We find top level categoty which correspond subcategory
break
else:
break
#3.Get first two images
p1 = Image.open(local_dir+category+"/background.png")
p2 = Image.open(local_dir+category+"/"+subcategory+"/1.png")
#3.1.Get random third image
folder_list = os.listdir(local_dir+"_gallery_png/") # Get list of folders
file_dir = local_dir+"_gallery_png/"+folder_list[int((len(folder_list)*random.random()))] # Get random folder
files = os.listdir(file_dir) # Get list of files inside of random folder
# Choose random file image from a random folder
p3 = Image.open(file_dir+"/"+files[int((len(files)*random.random()))]) # Choose random image from gallery
#3.1.1 Increase or decrease p3 if it is too small or too big
if p3.size[0]<200 and p3.size[1]<200:
krat = 300//p3.size[0] # How much times it should be enlarged
w2 = p3.size[0]*krat
h2 = p3.size[1]*krat
p3=p3.resize((w2,h2), Image.Resampling.NEAREST) # Increase image
if p3.size[0]>400 or p3.size[1]>400:
krat1 = p3.size[0]//300 # How much times it should be decreased
krat2 = p3.size[1]//300
krat = max(krat2, krat1)
w3=p3.size[0]//krat
h3=p3.size[1]//krat
p3=p3.resize((w3,h3), Image.Resampling.LANCZOS) # Decreas size
#3.2. Construct composite image
w = int(0.7*p1.size[0]*random.random()-p1.size[0]//2) # Generate random position to insert p2
h = int(0.7*p1.size[1]*random.random()-p1.size[1]//2)
p1.paste(p2, (w,h), mask=p2)
w1 = int((p1.size[0]-p3.size[0])*random.random()) # Generate random position to insert p3
h1 = int((p1.size[1]-p3.size[1])*random.random())
p1.paste(p3, (w1,h1), mask=p3)
#3.3. Apply random effects
imdir = local_dir+category+"/"+subcategory+"/"+nm+".png"
rullet = int(150*random.random()) # Random number from 0 to 150
if 0<= rullet <= 5: # 5% probability
p1 = p1.convert("L") # Made black&white
if 5< rullet <= 10: # 5% probability
p1 = p1.convert("1") # Made crop
if 10< rullet <= 15: # 5% from PIL import ImageOpsprobability
p1 = p1.filter(ImageFilter.CONTOUR) # contour
if 15< rullet <= 20: # 5% probability
p1 = p1.transpose(Image.FLIP_LEFT_RIGHT) # Mirror
if 20< rullet <= 25:
p1 = p1.filter(ImageFilter.GaussianBlur(radius = 2*random.random()+1 )) # blur
if 25< rullet <= 30:
p1 = p1.filter(ImageFilter.SHARPEN) # Sharpen
if 30< rullet <= 35:
p1 = ImageOps.expand(p1, border = 10, fill = 100) # border
if 35< rullet <= 40:
p1 = ImageEnhance.Color(p1).enhance(5.0*random.random()+1.0) # more colors
if 40< rullet <= 45:
p1 = ImageEnhance.Contrast(p1).enhance(5.0*random.random()+1.0) # more contrast
if 45< rullet <= 50:
p1 = ImageEnhance.Brightness(p1).enhance(5.0*random.random()+1.0) # more bright
if 50< rullet <= 55:
p1 = p1.filter(ImageFilter.MaxFilter(size=int(3*random.random()+1))) # fancy
p1.save(imdir,"PNG") #Save generated image
#4. Upload image to the remote server /www/outleys.site/mydiary/how_to/static/image/
c1 = pexpect.spawn('scp '+imdir+' u0224243@37.140.192.232:/var/www/u0224243/data/www/outleys.site/mydiary/how_to/static/image/'+category+'/') # Write an image to the server
c1.expect('(?i)password:') # Wait for password prompt
c1.sendline('UWP_5lyy') # send password
#5. Write image to database
sql = "UPDATE `how_to_article2` SET `im3` = %s WHERE `how_to_article2`.`id` = '"+str(r1)+"';" # Write into database
w = [ "image/"+category+"/"+nm+".png",]
m.execute(sql,w)
db.commit()
1.7. I unable to connect to database from python's mysql.connector.connect. Got an error mysql.connector.errors.ProgrammingError: 1045 (28000): Access denied for user '<user name>'@'xxx.xxx.137.192' (using password: YES) // Strange that ip addres doesn't correspond which one I specified in host parameter.
1.7.1. In hosting's admin panel I have to add new user and set checkbow to allow remote access.
1.8. pexpect.spawn('scp ..') doesn't move file from local machine to the server // Filename should be without spaces and exclamation points. Strip it out filename.strip("!").replace(" ","-")
1.9. I've faced problem with python. I have a dictionary with list. When I assign one dictionary element to another element of the same dictionary. When I after change secon element, first also change its value.