Imagin.

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

Installation

Install the core application with file-based image support:

pip install imagin

Features

• Input sources:

  • EPICS PVAccess and Channel Access
  • file system
  • HTTP image URLs
  • USB cameras

• PNG is the default image format; other formats are also supported.

• Fast, robust characterization of multiple objects using fitted ellipsoids.

• 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.

• 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.

Presentation

Examples

python -m imagin -b http https://cdn.esahubble.org/archives/images/large/heic1523b.jpg -t 100
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 -t 100 image0:image -b pva -m9

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