I have a scanner when i scan the page it makes a BMP file but the size per page is 50MB. How do i tell Python, make it JPEG and small size.
rv = ss.XferImageNatively()
if rv:
(handle, count) = rv
twain.DIBToBMFile(handle,'imageName.bmp')
how do you tell him to make it JPEG or PDF? ( Native transfers are always uncompressed images, so your image size will be: (width-in-inches * dpi) * (height-in-inches * dpi) * bytes-per-pixel)
You can use something like PIL (http://www.pythonware.com/products/pil/) or Pillow (https://github.com/python-pillow/Pillow), which will save the file in the format you specify based on the filename.
The python TWAIN module will return the bitmap from DIBToBMFile as a string if no filename is specified, so you can feed that string into one of the image libraries to use as a buffer. Otherwise, you can just save to a file, then open that file and resave it, but that's a rather roundabout way of doing things.
EDIT: see (lazy mode on)
from PIL import Image
img = Image.open('C:/Python27/image.bmp')
new_img = img.resize( (256, 256) )
new_img.save( 'C:/Python27/image.png', 'png')
Output: