  Energy-resolved neutron imaging at a pulsed source utilizes the
energy-dependent neutron transmission measured via time-of-flight to extract
quantitative information about the internal microstructure of an object. At the
RADEN instrument at J-PARC in Japan, we use cutting-edge detectors employing
micro-pattern detectors or fast Li-glass scintillators and fast, all-digital
data acquisition to perform such measurements, while continuing their
development toward better utilization of the intense neutron source. In
particular, for the Micro-Pixel Chamber based Neutron Imaging Detector
({\mu}NID), a micro-pattern detector with a 400 {\mu}m pitch and employing 3He
for neutron conversion, we have successfully improved the spatial resolution
from 200 to 100 {\mu}m, increased the detection efficiency from 18 to 26% for
thermal neutrons, and increased the maximum count rate from 0.4 to 1 Mcps. We
are also testing a new readout element with a 215 {\mu}m pitch for further
improved spatial resolution, and a {\mu}NID with boron-based neutron converter
for increased rate performance.
