[SYSTEMDS-1432] Extend `util::pad_image` with a `pad_value` parameter

• Type: Improvement
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Fix Version/s: SystemML 0.14
• Epic Link: Deep Learning DML Library
• Assignee: Mike Dusenberry
• Reporter: Mike Dusenberry
• Created: 22/Mar/17 21:28
• Updated: 28/Jun/17 20:03
• Resolved: 22/Mar/17 23:49

Description

Currently, our util::pad_image function performs zero-padding, which is correct for operations such as convolution. In some cases, such as max pooling, it is necessary to pad with a different value such as negative infinity. Therefore, we should extend our util::pad_image function to accept a pad_value parameter with a noted typical value of 0.