REKAYASA PERANGKAT LUNAK PENGOLAHAN CITRA DAN ANALISIS PERILAKU INTENSITAS PIXEL ROI (REGION OF INTEREST) CITRA RADIOGRAFI SINAR-X

Abstract

intensity pixels images. Datas subject are using sample step wedge images, are saved bmp (bitmap). Step wedge images cutting every step, their taken sample step 1 and 6 and cropping them, their produce ROI (Region of Interest) with size 10x10 pixel. Afterwards, ROI will be scaled-up of 2, and will be 20x20 pixel. Every cropping and scaling are displayed intensity pixel and histogram, and they are analysed. A research result shows that influence’s source code for cropping can be minimized with repeat cropping in region same in previous cropping. While scaling, nearest neighbor interpolation produces new intensity pixel as 255 is caused source code as 5%, and biliniear interpolation produces as 255, it’s new intensity pixel and the others are caused pixel neighbor junction. Image’s Computer Radiography shows step 6 has pixel intensity 107 (65,13%) and step 1 has pixel intensity 082 (78,12%). Step 1 image’s Image Intensifier Digitizer (yellow) with different setting of (voltage, current and exposure time) shows histogram result has different width’s histogram. And step 6 image’s Image Intensifier Digitizer(black) has width’s histogram shift lefter than step 1 image.