There are two more interesting image sensor theses published recently:
"Low-Power and Compact CMOS Circuit Design of Digital Pixel Sensors for X-Ray Imagers" PhD Thesis by Roger Figueras Bague, Barcelona University, Spain. Here is the pixel proposal:
"A 1-Mega Pixels HDR and UV Sensitive Image Sensor With Interleaved 14-bit 64Ms/s SAR ADC" MSc Thesis by Ruijun Zhang. Delft University, The Netherlands, presents his work at Caeleste with fairly complete circuit-level overview of all blocks of the image sensor from pixel to digital output.