ImageItem

class pyqtgraph.ImageItem(image=None, **kargs)

GraphicsObject displaying an image. Optimized for rapid update (ie video display)

__init__(image=None, **kargs)

See setImage for all allowed arguments.

getHistogram(bins=500, step=3)

returns x and y arrays containing the histogram values for the current image. The step argument causes pixels to be skipped when computing the histogram to save time.

pixelSize()

return scene-size of a single pixel in the image

setImage(image=None, autoLevels=None, **kargs)

Update the image displayed by this item. Arguments:

image autoLevels lut levels opacity compositionMode border

setLevels(levels, update=True)

Set image scaling levels. Can be one of:

[blackLevel, whiteLevel] [[minRed, maxRed], [minGreen, maxGreen], [minBlue, maxBlue]]

Only the first format is compatible with lookup tables.

setLookupTable(lut, update=True)

Set the lookup table to use for this image. (see functions.makeARGB for more information on how this is used) Optionally, lut can be a callable that accepts the current image as an argument and returns the lookup table to use.

setPxMode(b)

Set whether the item ignores transformations and draws directly to screen pixels.