MDPI publishes a joint paper by Vietnam National University, Hanoi University of Science and Technology, Imec, Ritsumeikan University, and Kindai University " An Image Signal Accumulation Multi-Collection-Gate Image Sensor Operating at 25 Mfps with 32 × 32 Pixels and 1220 In-Pixel Frame Memory " by Vu Truong Son Dao, Nguyen Ngo, Anh Quang Nguyen, Kazuhiro Morimoto, Kazuhiro Shimonomura, Paul Goetschalckx, Luc Haspeslagh, Piet De Moor, Kohsei Takehara, and Takeharu Goji Etoh. " The paper presents an ultra-high-speed image sensor for motion pictures of reproducible events emitting very weak light. The sensor is backside-illuminated. Each pixel is equipped with multiple collection gates (MCG) at the center of the front side. Each collection gate is connected to an in-pixel large memory unit, which can accumulate image signals captured by repetitive imaging. The combination of the backside illumination, image signal accumulation, and slow readout from the in-pixel signal sto...