Imagin. (Beta release).

Imagin is an interactive viewer and analyzer for streamed images and image files, built with Python, pyqtgraph, and SciPy.

Features

• Input sources:
  • file system
  • HTTP image URLs
  • EPICS Channel Access
  • EPICS PVAccess
  • USB cameras
• PNG is the default image format; other formats are also supported.
• Supports images with 16-bit or higher channel depth.
• Image orientation control and arbitrary rotation.
• Interactive zooming and panning.
• Contrast and color-map control.
• Region of interest (ROI) selection for image analysis.
• ROI partitioning.
• ROI projection plots.
• Isocurves, with the isocurve level used as the threshold for object detection.
• Fast, robust characterization of multiple objects using fitted ellipsoids.
• Optional Gaussian fitting in 1D or 2D for improved precision.
• De-speckling.
• Automatic background elimination using prominence filtering (de-base).
• Background subtraction using reference images.
• Interactive calibration from pixels to millimeters.
• Reference image slots for saving and restoring images.
• Extensible through user-supplied add-ons.
• Fast browsing and cleanup of image directories.
• Interactive Python console with access to image data, graphics objects, and the shell.

Presentation

Examples

python -m imagin -b file sample_images/*.jpg -t 100 -m 40
python -m imagin -b file ~/Pictures/*.png

Testing with EPICS PVAccess image simulator epicsdev.imagegen:

pip install epicsdev
python -m epicsdev.imagegen -c&
python -m imagin -b pva -t 100 image0:image

Animate by changing image parameters from a python script:

import time, numpy as np
from p4p.client.thread import Context
iface = Context('pva')

oneTo0 = 1 - np.linspace(0,1,11)
scales = np.append(oneTo0[:-1], np.flip(oneTo0)[2:])
for scale in scales:
    iface.put('image0:gridScaleX',scale)
    time.sleep(.1)

Testing with EPICS Channel Access

The simulated EPICS camera can be run from Docker:

https://hub.docker.com/r/klauer/simioc-docker

python3 setup_SimDetector.py
python3 -m imagin -b epics sim:det -m 16 -t 80