module imghelper.img_helper

Short summary

module pyquickhelper.imghelper.img_helper

Helpers around images.

source on GitHub

Functions

function	truncated documentation
_optimization_criterion
_optimization_histogram_order
concat_images	Concatenates images into an image with several rows of images.
white_to_transparency	Sets white color as transparency color.
zoom_img	Zooms an image.

Documentation

Helpers around images.

source on GitHub

pyquickhelper.imghelper.img_helper._optimization_criterion(target, data, weight_above=10, weight_below=1)

pyquickhelper.imghelper.img_helper._optimization_histogram_order(target, data, weight_above=10, weight_below=1)

pyquickhelper.imghelper.img_helper.concat_images(imgs, height=200, width=800, weight_above=10, weight_below=1, background=(0, 0, 0), out_file=None)

Concatenates images into an image with several rows of images.

Parameters:

• imgs – filename or Images (Pillow)

• height – height of each row (pixels)

• width – width of each row (pixels)

• weight_above – loss when a line is too long

• weight_below – loss when a line is too short

• background – background color

• out_file – stores the image into this file if not None

Returns:

Image (Pillow)

source on GitHub

pyquickhelper.imghelper.img_helper.white_to_transparency(img, out_file=None)

Sets white color as transparency color.

Parameters:

• img – image (Pillow)

• out_file – stores the image into this file if not None

Returns:

image (Pillow)

Code taken from Using PIL to make all white pixels transparent?.

source on GitHub

pyquickhelper.imghelper.img_helper.zoom_img(img, factor=1.0, max_dim=None, out_file=None, fLOG=None)

Zooms an image.

Parameters:

• img – image or filename or pattern

• factor – multiplies the image by this factor if not None

• max_dim – modifies the image, the highest dimension should below this number

• out_file – stores the image into this file if not None

• fLOG – logging function

Returns:

image

source on GitHub