计算机工程与设计
計算機工程與設計
계산궤공정여설계
COMPUTER ENGINEERING AND DESIGN
2015年
4期
930-936
,共7页
龚泽挚%陈陇敏%颜洪胜%郑雅羽
龔澤摯%陳隴敏%顏洪勝%鄭雅羽
공택지%진롱민%안홍성%정아우
人工视觉%DM6437%植入体电极%降像素化%空域响应
人工視覺%DM6437%植入體電極%降像素化%空域響應
인공시각%DM6437%식입체전겁%강상소화%공역향응
artificial vision%DM6437%implant electrode%reduce pixel%space responses
为满足人工视觉在动物临床实验上的特定需求，设计以 DM6437为硬件平台的人工视觉一体化系统。为解决视觉信息量大和有限的植入体电极数目之间的矛盾，提出基于块分割和灰度分级的降像素化视觉图像处理方法，建立灰度等级和刺激电流幅度相关联的电极刺激策略。进行系统空域响应测试，测试结果表明，一对一的电极刺激准确率达到95％，在功耗一定的条件下优化后的系统图像处理速度可达30 fps，满足视觉中枢系统的实时性要求。
為滿足人工視覺在動物臨床實驗上的特定需求，設計以 DM6437為硬件平檯的人工視覺一體化繫統。為解決視覺信息量大和有限的植入體電極數目之間的矛盾，提齣基于塊分割和灰度分級的降像素化視覺圖像處理方法，建立灰度等級和刺激電流幅度相關聯的電極刺激策略。進行繫統空域響應測試，測試結果錶明，一對一的電極刺激準確率達到95％，在功耗一定的條件下優化後的繫統圖像處理速度可達30 fps，滿足視覺中樞繫統的實時性要求。
위만족인공시각재동물림상실험상적특정수구，설계이 DM6437위경건평태적인공시각일체화계통。위해결시각신식량대화유한적식입체전겁수목지간적모순，제출기우괴분할화회도분급적강상소화시각도상처리방법，건립회도등급화자격전류폭도상관련적전겁자격책략。진행계통공역향응측시，측시결과표명，일대일적전겁자격준학솔체도95％，재공모일정적조건하우화후적계통도상처리속도가체30 fps，만족시각중추계통적실시성요구。
To meet specific needs of the artificial vision clinical experiments on animal,a DM6437-based integrated system was designed.To solve the conflict between the huge visual information and a limited array of implant electrode,a reducing visual image pixel method based on block partition and graded gray was presented.Meanwhile,an electrode stimulation strategy which associated gray levels with stimulus current amplitude was constructed.Finally,the results of test on space responses show that one to one electrode stimulation accuracy reaches 95% and when the system at certain power consumption,it achieves 30 fps pro-cessing speed after optimization,which meets real-time processing requirements of visual central system.
