Discovering Limitations of Image Quality Assessments with Noised Deep Learning Image Sets
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Image quality is important, and it can affect overall performance in image processing and computer vision as well as for numerous other reasons. Image quality assessment (IQA) is consequently a vital task in different applications from aerial photography interpretation to object detection to medical image analysis. In previous research, the BRISQUE algorithm and the PSNR algorithm were evaluated with high resolution ( 512*384 pixels per image), but relatively small image sets (4,744 images). However, scientists have not evaluated IQA algorithms on low resolution (32*32 pixels per image), multi-perturbation, big image sets (for example, 60,000 different images not counting their perturbations). This study explores these two IQA algorithms through experimental investigation. We first chose two deep learning image sets, CIFAR-10 and MNIST. Then, we added 68 perturbations that add noise to the images in specific sequences and noise intensities. In addition, we tracked the performance outputs of the two IQA algorithms with singly and multiply noised images. After quantitatively analyzing experimental results, we report the limitations of the two IQAs with these noised CIFAR-10 and MNIST image sets. We also explain three potential root causes for performance degradation. These findings point out weaknesses of the two IQA algorithms. The research results provide guidance to scientists and engineers developing accurate, robust IQA algorithms. In addition to supporting future scientific research and industrial projects, all source codes are shared on the website: https://github.com/caperock/imagequality
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