This paper presents a novel Snapshot Compressed Imaging (SCI)-based computer vision framework that utilizes an 8x8 pseudo-random binary mask to overcome the limitations of existing SCI techniques, which exhibit poor performance under low-light and low-SNR conditions. At its core is the Compressive Denoising Autoencoder (CompDAE) based on the STFormer architecture, which is designed to directly perform subsequent tasks such as edge detection and depth estimation without image reconstruction. CompDAE integrates a rate-constrained training strategy inspired by BackSlash to generate compressible models and provides an integrated multi-task platform using a lightweight task-specific decoder and a shared encoder. Experimental results on various datasets demonstrate that CompDAE achieves state-of-the-art performance with significantly reduced complexity, particularly under ultra-low-light conditions where existing CMOS and SCI pipelines fail.