Images are broken down into tiles of a set number of pixels, and the degree of compression acceptable is assessed according to the level of information recorded in the tile.
Beamer jpegmini software#
The software works by analyzing the content of each image, and determining how much compression can be applied to each individual area. This quality measure has much better correlation with human results than other scientific quality measures.' Any JPEG compression introduces artefacts, but the question is, are these artefacts visible by humans or not? We have developed a quality measure that gives us that answer with very high accuracy. Of course, the JPEG process introduces artefacts that you don't find in the RAW file, so any JPEG produced by Photoshop or Lightroom will have artefacts, but our claim is that our processed image will look the same as the original JPEG and the compression will not introduce further artefacts.
Beamer jpegmini professional#
'Most of our customers are professional photographers, and they have realised that the photos that they get out of JPEGmini are as good as the originals and that they can use them in the same situations and for the same uses. 'Any JPEG compression introduces artefacts, but the question is,Īre these artefacts visible by humans or not?' Gill said that '99% of the population' wouldn't be able to tell the difference, including most photographers. I wanted to know who the 'you' was in that qualification – as the opinions of a general consumer, a photographer and a scientist will all be significantly different. That's what we call 'perceptually identical' to the original.' When we talk about 'perceptual image quality' we mean that if you took this photo and viewed it on your screen at Actual Pixels, or 100% magnification, and compared it to the original you wouldn't be able to determine which was the original and which one was the optimized. We recompress that standard JPEG photo by up to 80%, and the resolution remains the same and the perceptual quality of the image remains the same. The input is a standard JPEG and the output is a standard JPEG. In an interview, Beamr's CTO Dror Gill explains how JPEGmini works and how the company measures its claimed 'no change' in image quality. How it worksĭror Gill, CTO and VP of Beamr, the company behind JPEGmini
We've read up on it and written about its desktop and mobile applications briefly, but Senior DPReview Contributor Damien Demolder recently had the chance to sit down with the company's Chief Technology Officer to find out more about how it works. The idea is to save space on hard drives, external storage devices, make websites run more quickly, deliver more manageable file sizes to clients and help reduce spending on cloud storage.
Introduced in 2011, JPEGmini acts as a standalone product or as a plug-in for Lightroom and is a compression optimizer that takes in existing JPEG files and makes them smaller – without reducing the quality of the image, the company claims. But that is exactly what Beamr, the company behind the JPEGmini application, is offering. Hence, the idea of buying a piece of software that aims to reduce the size of JPEG files by up to 80% might seem a little crazy. If offered the choice between more or less image compression, I suspect that most photographers would always go for less. It makes our files more manageable in terms of size, but reduces the quality of our images and can undo the incremental benefits of buying more pixels and better lenses. Most of us think of image compression as a necessary evil.
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