[PATCH 0/2] Add contrast control to software ISP

[Milan Zamazal]

These are preview patches adding support to software ISP for modifying
image processing parameters in runtime.  They depend on patches not yet
merged and are likely to be modified based on how those patches evolve.
They serve as an illustration and proof of concept how the implementation of software ISP controls can be done.

The first software ISP image control, implemented here, is contrast.  It is simple to implement, doesn’t slow down image processing and can enhance the image easily.

Milan Zamazal (2):
  libcamera: software_isp: Add contrast algorithm
  libcamera: software_isp: Add contrast control

 .../internal/software_isp/software_isp.h      |  3 +-
 include/libcamera/ipa/soft.mojom              |  2 +-
 src/ipa/simple/algorithms/contrast.cpp        | 45 +++++++++++++++++++
 src/ipa/simple/algorithms/contrast.h          | 37 +++++++++++++++
 src/ipa/simple/algorithms/gamma.cpp           | 22 ++++++---
 src/ipa/simple/algorithms/meson.build         |  1 +
 src/ipa/simple/data/uncalibrated.yaml         |  1 +
 src/ipa/simple/ipa_context.h                  |  4 ++
 src/ipa/simple/soft_simple.cpp                | 13 +++++-
 src/libcamera/pipeline/simple/simple.cpp      |  2 +-
 src/libcamera/software_isp/software_isp.cpp   |  8 +++-
 11 files changed, 126 insertions(+), 12 deletions(-)
 create mode 100644 src/ipa/simple/algorithms/contrast.cpp
 create mode 100644 src/ipa/simple/algorithms/contrast.h

-- 
2.44.1