Picture Quality

Picture quality: vendor vs open stack

Per SoC/sensor comparison of the Ingenic vendor stack (vendor tx-isp + libimp) and the open stack (open-tx-isp + OpenIMP) on the same camera, same position and light, plus an encoder test pattern (synthetic NV12 pattern fed into the encoders, decoded and compared with the ideal). Only synthetic test patterns are shown as pictures; scene results are given as numbers.

SoC	Sensor	Page
T20	JX-F23	T20 / JX-F23
T21	JX-F23	T21 / JX-F23
T23	SC2336P	T23 / SC2336P
T31	SC4336P	T31 / SC4336P

T40/T41: encoder test pattern passed (H.264 chroma bit-exact, SSIM ≥ 0.997, incl. I2D rotation); vendor comparison pending.

The test pattern (modes, API, tpctl, host tools, status per SoC) is described on the OpenIMP wiki: Test Pattern and in docs/TESTPATTERN.md. Mode 4 (sensor pattern through the whole ISP) is device-tested on T20, T21 and T23.