EVIDENCE 4: INDONESIAN POLICE OFFICERS REDUCING THE FRAME RESOLUTION OF CCTV 9 FOOTAGE
The 37 Scientific Evidence of Digital Evidence Tampering on CCTV Footage at Olivier Café: The Jessica Kumala Wongso Case (2016), Carried Out by Muhammad Nuh Al-Azhar and Christopher Hariman Rianto, Who were Under the Leadership of the General Crime Director of the Jakarta Metropolitan Police, Krishna Murti, and the Chief of the Jakarta Metropolitan Police, Tito Karnavian.
EVIDENCE 4:
COMPARING COFFEE COLORS WHILE REDUCING THE FRAME RESOLUTION FROM 1920x1080 PIXELS TO 960x576 PIXELS
Christopher Hariman Rianto deliberately split CCTV 9 footage into two segments as follows:
SEGMENT 1: 15:35 – 16:59 local time
The dimensions of the frame were reduced to 960x 576px, and frame rate was reduced to 10 fps. The coffee color here was captured when Agus Triono served coffee at table 54.
SEGMENT 2: 16:59 – 18:25 local time
The frame dimensions remained full high definition 1920x108px, and frame rate remained at 25 fps. The coffee color here was captured when Sari took the coffee cup after Mirna Salihin drank from it.
Six fraudulent prosecutors Ardito Muwardi, Shandy Handika, Sugih Carvallo, Hari Wibowo, Wahyu Oktaviandi, and Maylany Wuwung conspired with fellow fraudulent CCTV video manipulator Muhammad Nuh Al-Azhar.
ANALYZED BY
DR.ENG RISMON H. SIANIPAR, S.T, M.T, M.ENG
AUTHOR, LECTURER, PROGRAMMER, AND COMPUTER VISION EXPERT
EVIDENCE 4:
COMPARING COFFEE COLORS WHILE REDUCING THE FRAME RESOLUTION FROM 1920x1080 PIXELS TO 960x576 PIXELS
Christopher Hariman Rianto deliberately split CCTV 9 footage into two segments as follows:
SEGMENT 1: 15:35 – 16:59 local time
The dimensions of the frame were reduced to 960x 576px, and frame rate was reduced to 10 fps. The coffee color here was captured when Agus Triono served coffee at table 54.
SEGMENT 2: 16:59 – 18:25 local time
The frame dimensions remained full high definition 1920x108px, and frame rate remained at 25 fps. The coffee color here was captured when Sari took the coffee cup after Mirna Salihin drank from it.
Six fraudulent prosecutors Ardito Muwardi, Shandy Handika, Sugih Carvallo, Hari Wibowo, Wahyu Oktaviandi, and Maylany Wuwung conspired with fellow fraudulent CCTV video manipulator Muhammad Nuh Al-Azhar.
ANALYZED BY
DR.ENG RISMON H. SIANIPAR, S.T, M.T, M.ENG
AUTHOR, LECTURER, PROGRAMMER, AND COMPUTER VISION EXPERT
Category
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LearningTranscript
00:00Australian resident Jessica Wongso has been charged with the murder of Minis Alihin.
00:09Police allege she poisoned her friend by adding cyanide to her coffee.
00:13Jessica is like a devil.
00:16Deep inside is something like evil.
00:20It is said that the trial of the century is true.
00:29Jessica Wongso has been charged with the murder of Minis Alihin.
00:33She is said to have poisoned her friend by adding cyanide to her coffee.
00:37She is said to have poisoned her friend by adding cyanide to her coffee.
00:41She is said to have poisoned her friend by adding cyanide to her coffee.
00:45She is said to have poisoned her friend by adding cyanide to her coffee.
00:49She is said to have poisoned her friend by adding cyanide to her coffee.
00:53She is said to have poisoned her friend by adding cyanide to her coffee.
00:57The coffee color here was captured when Agus Triono served coffee at table 54.
01:13Segment 2, 1659 to 1825 local time.
01:19The frame dimensions remained full high definition 1920x108px,
01:24and frame rate remained at 25 frames per second.
01:27The coffee color here was captured when Sari took the coffee cup after Murna Salihin drank from it.
01:34We can see the color analysis here.
01:38We can see the color analysis here.
01:45The last thing I did was to analyze the coffee color after Sari drank from it.
01:55We can see that there is a significant color difference between the coffee in Guridong,
02:07in Nampan, Agus Tri at the time of serving,
02:11and when other guests have stirred and drank other coffee.
02:20Analysis
02:22Reducing the frame resolution from 1920x1080px to 960x576px in the CCTV Video 9,
02:30specifically during the segments described,
02:33can have significant forensic implications, particularly when comparing coffee colors.
02:381. Loss of color detail
02:40The reduction in frame resolution results in a loss of color detail,
02:44making it challenging to accurately capture and analyze subtle differences in the coffee colors depicted in the footage.
02:51Fine variations in hue, saturation, and brightness may be lost or distorted,
02:56impacting the reliability of color comparisons between the two segments.
03:012. Decreased clarity
03:03The lower frame resolution diminishes the overall clarity and sharpness of the imagery,
03:08potentially affecting the visibility and distinction of the coffee colors.
03:12Critical visual cues necessary for discerning differences in color between the segments,
03:17such as the intensity of the coffee hue or any variations in color gradient,
03:22may be compromised, hindering accurate forensic analysis.
03:263. Impaired color consistency
03:29The discrepancy in frame resolution between the segments introduces inconsistencies in the portrayal of coffee colors,
03:35as the lower resolution may alter the rendering of color information.
03:39This inconsistency makes it challenging to establish a reliable baseline for comparing coffee colors across the segments,
03:46leading to potential inaccuracies or misinterpretations in forensic assessments.
03:514. Impact on comparative analysis
03:54The disparity in frame resolution and subsequent differences in color representation
03:59pose challenges for conducting comparative analysis of the coffee colors captured in each segment.
04:05Without uniformity in resolution, color fidelity, and image clarity,
04:10it is impossible to draw conclusive findings regarding any discrepancies or similarities in the coffee colors observed.