No TIF support on Ubuntu 18.04

[Camilochiang]

I tried with your newest version and 4.2.9 as recommend in #675 but in no case i was able to open TIF images. Any suggestion?
It work normally with JPG.

in iPython

from` PyQt5.Qt import PYQT_VERSION_STR
PYQT_VERSION_STR
'5.10.1'

QImageReader.supportedImageFormats()
[PyQt5.QtCore.QByteArray(b'bmp'),
 PyQt5.QtCore.QByteArray(b'cur'),
 PyQt5.QtCore.QByteArray(b'gif'),
 PyQt5.QtCore.QByteArray(b'ico'),
 PyQt5.QtCore.QByteArray(b'jpeg'),
 PyQt5.QtCore.QByteArray(b'jpg'),
 PyQt5.QtCore.QByteArray(b'pbm'),
 PyQt5.QtCore.QByteArray(b'pgm'),
 PyQt5.QtCore.QByteArray(b'png'),
 PyQt5.QtCore.QByteArray(b'ppm'),
 PyQt5.QtCore.QByteArray(b'svg'),
 PyQt5.QtCore.QByteArray(b'svgz'),
 PyQt5.QtCore.QByteArray(b'xbm'),
 PyQt5.QtCore.QByteArray(b'xpm')]

[Camilochiang]

Ok. So after updating qt5 with

sudo apt install qt5-image-formats-plugins

I can import the images but I immediately get an error saying the following:

Error opening file
Make sure /home/ubuntu/Documents/Research/20210314_Running/20210707_Vine/Data/20210706/Output/Altum/IMG_0001.tif is a valid image file.
Supported image formats: *.bmp,*.cur,*.gif,*.icns,*.ico,*.jpeg,*.jpg,*.mng,*.pbm,*.pgm,*.png,*.ppm,*.svg,*.svgz,*.tga,*.tif,*.tiff,*.wbmp,*.webp,*.xbm,*.xpm

It works with TIF files that I did from ARW (RAW files) with three bands (RGB) using the GDAL library, with a single band TIF coming directly out of a multispectral camera, but it faill with a 6 bands GeoTIF (Still a TIF format) . I will try redoing the 6 band GeoTIF to check if is the number of bands or the additional geo information what generate the problem

[wkentaro]

I'm not sure but maybe you're getting an error from here?

labelme/labelme/label_file.py

Lines 48 to 53 in 4754b26

	def load_image_file(filename):
	try:
	image_pil = PIL.Image.open(filename)
	except IOError:
	logger.error("Failed opening image file: {}".format(filename))
	return

If so, we need somehow change PIL.Image.open to support TIF format.

[Camilochiang]

So yes, after checking the problem is PIL. It do not have the capacity to read stack TIF pictures as gdal have. May be a too specific case to fix it? if not, Would you like to have example file? is quite heavy so I have to share in drive or something.

[wkentaro]

I'm happy to support it, but I don't have time to work on that myself.