In a previous work, we proposed a color extension of an existing focal-plane tone-mapping operator (FPTMO) and introduced circuit modifications that led to smaller sensing array area and simpler off-chip white-balance operations. The proposed FPTMO chip was fabricated and its experimental test setup is under development. In the present work, we systematically compare the previously proposed FPTMOs with conventional digital tone-mapping operators (DTMOs), both in terms of overall image quality and execution time. To assess the image quality, we use the Tone-Mapped image Quality Index (TMQI) metric, the Blind Tone-Mapped Quality Index (BTMQI) metric, and an image colorfulness metric. By statistically comparing the results given by both metrics, we verify that the proposed FPTMOs achieve results similar to those obtained with DTMOs, occasionally outperforming them. To compare the tone-mapping operators execution times, we perform a detailed complexity analysis. Results show that system-level software FPTMO descriptions (FPTMO functionality described in software) rank among the fastest DTMOs and that the hardware FPTMO (described in software) speed-up depends on the target frame rate. For 30-frames-per-second color image generation, the fastest FPTMO is 15 times faster than the DTMO with highest TMQI and BTMQI metric scores, and 170 times faster than the DTMO with best colorfulness metric score.

在先前的工作中，我们提出了现有焦平面色调映射算子（FPTMO）的颜色扩展，并介绍了电路修改，这些修改导致更小的传感阵列面积和更简单的片外白平衡操作。拟议中的FPTMO芯片已经制作完毕，其实验测试装置正在开发中。在当前的工作中，我们从整体图像质量和执行时间两方面系统地比较了先前提出的FPTMO和传统的数字色调映射运算符（DTMO）。为了评估图像质量，我们使用了色调映射图像质量指数（TMQI）度量，盲色调映射质量指数（BTMQI）度量和图像色彩度度量。通过对两个指标给出的结果进行统计比较，我们验证了拟议的FPTMO实现了与DTMO类似的结果，偶尔表现不佳。为了比较色调映射运算符的执行时间，我们执行了详细的复杂度分析。结果表明，系统级软件FPTMO描述（软件中描述的FPTMO功能）在最快的DTMO中名列前茅，而硬件FPTMO（以软件描述）的加速取决于目标帧速率。对于每秒30帧的彩色图像生成，最快的FPTMO比具有最高TMQI和BTMQI度量得分的DTMO快15倍，比具有最佳色彩度量得分的DTMO快170倍。结果表明，系统级软件FPTMO描述（软件中描述的FPTMO功能）在最快的DTMO中名列前茅，而硬件FPTMO（软件中描述）的加速取决于目标帧速率。对于每秒30帧的彩色图像生成，最快的FPTMO比具有最高TMQI和BTMQI度量得分的DTMO快15倍，比具有最佳色彩度量得分的DTMO快170倍。结果表明，系统级软件FPTMO描述（软件中描述的FPTMO功能）在最快的DTMO中名列前茅，而硬件FPTMO（以软件描述）的加速取决于目标帧速率。对于每秒30帧的彩色图像生成，最快的FPTMO比具有最高TMQI和BTMQI度量得分的DTMO快15倍，比具有最佳色彩度量得分的DTMO快170倍。