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Thermal Camera Image Quality VoC Guide

Created by: SungHwan Kim (sunghwan.k@hanwha.com)
Created time: March 2025
Last edited time: September 2025
Product Category: Camera
Resolution Status:
ZD KB Article URL: here

1. Thermal Camera Generational Classification

mceclip0.png

The FPGA version and SoC differ across generations, leading to variations in VoC response strategies. Below is a breakdown of the different generations and their corresponding handling approaches.

2. Required On-Site Information for VoC Handling

To properly address VoC cases, the following on-site details are required:

2-1. Site Environment Information

  • Installation location: Indoor or Outdoor
  • Minimum/Maximum temperature displayed on OSD
  • Detailed description of the issue as perceived by the customer

2-2. Reference Images

  • Normal state image (For dual models, a visible-light image is also required)

2-3. Issue state image

  • Photos, Screenshot or Video Recordings

2-4. Camera Setup Verification

  • Check if settings such as contrast, brightness, etc., have been modified

2-5. OSD Information

  • Capture a screenshot of the OSD on/off CGI settings:
  • OSD ON:
/stw-cgi/factory.cgi?action=apply&size=10&val1=a0&val2=F2&val3=FF&val4=04&val5=00&val6=00&val7=00&val8=00&val9=00&val10=af
  • OSD OFF:
/stw-cgi/factory.cgi?action=apply&size=10&val1=a0&val2=F2&val3=FF&val4=00&val5=00&val6=00&val7=00&val8=00&val9=00&val10=af

2-6. Additional OSD Requirement for 1st-Gen Models (TNO-3030T, TNO-4050T)

For TNO-3030T and TNO-4050T, additional OSD settings need to be applied using the following CGI commands.

A. Check 0x9000:

/stw-cgi/factory.cgi?action=apply&size=14&val1=A0&val2=F3&val3=00&val4=01&val5=90&val6=00&val7=00&val8=00&val9=00&val10=00&val11=00&val12=00&val13=00&val14=AF

B. Check 0x9010:

/stw-cgi/factory.cgi?action=apply&size=14&val1=A0&val2=F3&val3=00&val4=01&val5=90&val6=10&val7=00&val8=10&val9=01&val10=00&val11=00&val12=00&val13=00&val14=AF

C. Check 0x901C:

/stw-cgi/factory.cgi?action=apply&size=14&val1=A0&val2=F3&val3=00&val4=01&val5=90&val6=1C&val7=00&val8=10&val9=01&val10=00&val11=00&val12=00&val13=00&val14=AF

3. 1st-Gen Models: VoC Response Guide

3-1. VoC Type

VoC Type Cause
Image Quality Degradation Narrow temperature distribution in the scene
AI Recognition Improvement (Image Quality Enhancement Request) False detections occur due to overall brightness fluctuations when vehicles enter the scene

3-2. Countermeasures:

1) Beta FW Required (Reference: Norway Tunnel VOC Response History)

  • Adjust response speed to temperature changes in objects
  • Modify the intensity of histogram stretching (HS)

2) No Need to Change Camera Setup Menu

  • Only provides minor improvements in expression quality

4. 2nd-Gen Models: VoC Response Guide

4-1. VoC Type

VoC Type Cause
Image Quality Degradation Narrow temperature distribution in the scene
Grid Pattern Occurrence & Image Saturation Grid pattern saturation occurs in specific environments where the temperature distribution is confined to a narrow region

4-2. Countermeasures:

1) Provide Beta FW

  • Use the previously distributed grid pattern improvement FW
  • TNM-C4950TD_2.29.99_20241219.img

2) Adjust Camera Setup Menu

  • Modify the intensity of histogram stretching (HS)
  • From the 2nd generation, it is linked to the contrast menu and can be adjusted
  • Contrast Level 1: HS is applied more strongly
  • Sharpness Level 3–6: If HS is applied strongly, sharpness should be reduced to minimize noise

5. 3rd-Gen Models: VoC Response Guide

Once countermeasures are in place, the document will be updated accordingly.