JPG_Quality_Loss

N.Vischer 23-May-2018

ImageJ macro for testing the JPG quality loss for spatial measurements.
We detect the minima along radial profiles in an image with concentric rings
that are spaced at 15 pixels.


Try it:

Run the macro

https://sils.fnwi.uva.nl/bcb/objectj/examples/utils/JPG_Quality_Loss/JPG_Quality_Loss.txt

Test 1:
=======
JPG Quality:  90
Image size (K):  156.2
JPG File size (K):  26.5
Max Contrast Flag:  1
Nominal Interval = 15 pixels

intervalsTIF: StdDev = 0.1427 pixels
intervalsJPG: StdDev = 0.2061 pixels

Range TIF: = 14.6 - 15.5 pixels
Range JPG: = 14.5 - 15.8 pixels

Test 2:
=======
JPG Quality:  75
Image size (K):  156.2
JPG File size (K):  10.0
Max Contrast Flag:  0
Nominal Interval = 15 pixels

intervalsTIF: StdDev = 0.1453 pixels
intervalsJPG: StdDev = 0.3781 pixels

Range TIF: = 14.6 - 15.5 pixels
Range JPG: = 14.2 - 15.9 pixels