The objective of image compression is to reduce irrelevance and redundancy of the image data in order to be able to store or transmit data in an efficient form. Image compression may be lossy or lossless.

In calculus, a derivative is a measure of a function's rate of change as its input changes.

Related to computer games' engines and 3d graphics software. For the use of both shadow and light in GUIs and for the use of lighting with respect to programs using hardware such as cameras, that requires code to control the lighting. Must be used with other relevant tags distinguishing the programming language and framework being used. e.g. unity 3d Not to be used with light, as is used in physics having wave and particle characteristics.

This tag is for questions related to the MySQL database, version 8.0.

Broadcasting (or singleton expansion) applies a function element-wise across one or more multidimensional arrays, matching shapes of the arguments by repeating missing or singleton dimensions. Be sure to also tag the programming language; many languages with strong array support have implicit or explicit broadcasting behaviors, sometimes with idiosyncratic rules.

Dialogflow ES is a natural language platform owned by Google. (Formerly known as just Dialogflow or as api.ai.) A fulfillment in Dialogflow ES allows an intent to perform operations on input parameters and return an output. Use this tag when issues arise with building fulfillments. For questions about the Dialogflow ES API or UI, use the dialogflow-es tag. For the similarly named, but incompatible, Dialogflow CX, use the dialogflow-cx tag.

For questions about scientific computing involving weather analysis and/or simulations. Any weather questions on this site should be programming-related.

ISAM database format originally created in dBase but used by many other systems like `Clipper` and `FoxPro` and still widely used for information interchange.

JCR is an acronym for Java Content Repository: an API and object database of hierarchical data mainly used by content management systems. Apache Jackrabbit is an open source implementation; there are several commercial products.

In R, the "melt" function from the "reshape2" and "data.table" (and earlier, "reshape") packages converts data into a long form. Melt is also a web application framework written in PHP.

CKAN is an open-source data management system (DMS) to build data portals focused on open data. If your question is not closely related to programming, please consider asking your question on https://opendata.stackexchange.com.