Downscaling VS Compression

• smlr

  1 433 10.0 Go

  Re-encode jpeg images with no perceivable quality loss.

That's a shame -- it means you are stuck with the JPEG artifacts. Re-saving it as a lower-quality JPEG will likely be worse than the result you would have had coming directly from the source image. https://github.com/jasonmoo/smlr could help you do that.

• jpegtran

  1 133 10.0 C

  jpegtran fork with significant performance improvements

  

You could use jpegtran and specify a custom scan file to re-quantize the DCT data without recalculating it: https://github.com/cloudflare/jpegtran/blob/master/wizard.txt ... if you are willing to go down the rabbithole, this is probably the best way to reduce the size of a JPEG with minimal loss in quality.

• InfluxDB

  www.influxdata.com featured

  Power Real-Time Data Analytics at Scale. Get real-time insights from all types of time series data with InfluxDB. Ingest, query, and analyze billions of data points in real-time with unbounded cardinality.

  

• knusperli

  4 465 0.0 C++

  A deblocking JPEG decoder

  

If you're going for full re-encoding, it might help to decode the current JPEG with https://github.com/google/knusperli ... but if you re-JPEG that you might have second-order artifacts. Give it a try. Then compress with https://github.com/google/guetzli

• guetzli

  10 12,881 0.0 C++

  Perceptual JPEG encoder

  

If you're going for full re-encoding, it might help to decode the current JPEG with https://github.com/google/knusperli ... but if you re-JPEG that you might have second-order artifacts. Give it a try. Then compress with https://github.com/google/guetzli

Suggest a related project