https://www.verdenforensics.com/articles daily 0.75 2026-05-25 https://www.verdenforensics.com/articles/super-resolution monthly 0.5 2026-05-25 https://images.squarespace-cdn.com/content/v1/58e9d88d1b10e3a416cec8b3/635c6272-665a-4cdd-82b5-c2715e3230e8/Video+Expert+%7C+Image+Expert+%7C+Forensics+Expert+%7C+CCTV+Expert+%7C+Facial+Comparison+Expert Articles - What Is Super-Resolution in Forensic Video Analysis? - Make it stand out Figure 1: Sequence of low-resolution plates with sub-pixel shifts [-0.5,0.5] and resulting super-resolution image. https://images.squarespace-cdn.com/content/v1/58e9d88d1b10e3a416cec8b3/176dfd88-520d-4b12-bbf5-95f0244c69fd/Image2.png Articles - What Is Super-Resolution in Forensic Video Analysis? - Make it stand out Figure 2: Loading the sequence in Impress and adjusting the parameters of the super resolution filter on the first frame. https://images.squarespace-cdn.com/content/v1/58e9d88d1b10e3a416cec8b3/cf3b7c03-78a5-4973-a25d-7d74eb03c8c7/Video+Expert+%7C+Image+Expert+%7C+Forensics+Expert+%7C+CCTV+Expert+%7C+Facial+Comparison+Expert Articles - What Is Super-Resolution in Forensic Video Analysis? - Make it stand out Figure 3: Weighted Median interpolation super resolution result. https://images.squarespace-cdn.com/content/v1/58e9d88d1b10e3a416cec8b3/ff63a6bb-4146-405f-b57f-52004f4dd058/Video+Expert+%7C+Image+Expert+%7C+Forensics+Expert+%7C+CCTV+Expert+%7C+Facial+Comparison+Expert Articles - What Is Super-Resolution in Forensic Video Analysis? - Make it stand out Figure 4: Iterative Weighted interpolation result. https://images.squarespace-cdn.com/content/v1/58e9d88d1b10e3a416cec8b3/dbb182e0-e51b-4d9f-9d35-0f0ddf74f2f3/Image5.png Articles - What Is Super-Resolution in Forensic Video Analysis? - Make it stand out Figure 5: Post-processing with a general deblur filter. https://www.verdenforensics.com/articles/de-haze monthly 0.5 2026-05-25 https://images.squarespace-cdn.com/content/v1/58e9d88d1b10e3a416cec8b3/f4edfacc-102f-4e22-a40c-927145ad91c0/Digital+Forensics Articles - Improving Visibility in CCTV Footage Using Dehazing - Make it stand out Figure 1: Applying the Dehaze filter to a misty picture. The parameters Red, Green and Blue are the colour components of the selected atmospheric background in the picture. The colour picker ‘parameter’ allows selection of the atmospheric colour by clicking on the picture to the left. https://images.squarespace-cdn.com/content/v1/58e9d88d1b10e3a416cec8b3/1e4bd00c-db15-4e68-8b97-a99ca562c805/Blog2.png Articles - Improving Visibility in CCTV Footage Using Dehazing - Make it stand out Figure 2: Applying the Dehaze filter on an image with foggy atmosphere. By varying the Transmission parameter, one can select which distance from the camera has optimised levels. https://images.squarespace-cdn.com/content/v1/58e9d88d1b10e3a416cec8b3/860f608e-f38c-4528-8d8e-37947bfdc4e1/Blog3.png Articles - Improving Visibility in CCTV Footage Using Dehazing - Make it stand out Figure 3: Varying the Transmission parameter over 80%, 60%, 40% and 20% reveals details in the image from front to back. https://images.squarespace-cdn.com/content/v1/58e9d88d1b10e3a416cec8b3/653f6495-ecf9-4df4-9d24-2ac4ad5c223d/Blog4.png Articles - Improving Visibility in CCTV Footage Using Dehazing - Make it stand out Figure 4: By picking a different atmospheric colour from this sandstorm image, indicated by the red arrows, different details are revealed in the situation at the top and bottom. The colours were picked by clicking on the left-side image (solid red arrows). https://www.verdenforensics.com/articles/noise-part-2 monthly 0.5 2026-05-25 https://images.squarespace-cdn.com/content/v1/58e9d88d1b10e3a416cec8b3/c4f5df46-f1ca-4f4b-ac31-1a632419b298/Image+Enhancement+%7C+Photo+Enhancement+%7C+Improve+Photo+Quality+%7C+CCTV+Forensics+%7C+Image+Forensics Articles - Forensic Video Noise Reduction Explained - Make it stand out Figure 1: A natural image (a) and its corresponding power spectrum (b). (c) gives a schematic description of the power spectrum in areas (0)-(3). (0) contains the origin (frequency zero) and low frequencies, (1) the higher horizontal frequencies, (2) the higher vertical frequencies and (3) mainly noise and some high frequencies. https://images.squarespace-cdn.com/content/v1/58e9d88d1b10e3a416cec8b3/604e01b9-f461-488e-a7fe-f67caff16d04/Photo+Forensics+%7C+Image+Forensics+%7C+Digital+Forensics Articles - Forensic Video Noise Reduction Explained - Make it stand out Figure 2: Filter frequency response of Gaussian (blue), Butterworth (yellow) and Ideal (red) filter kernel. https://images.squarespace-cdn.com/content/v1/58e9d88d1b10e3a416cec8b3/96ad355f-f7fc-4bf8-bf42-ecfa00e93c0f/Improve+number+plate+%7C+Digital+Forensics+%7C+Video+Forensics Articles - Forensic Video Noise Reduction Explained - Make it stand out Figure 3: Example of an image contour point P and the direction along the contour A and perpendicular to the contour B. https://images.squarespace-cdn.com/content/v1/58e9d88d1b10e3a416cec8b3/1f3cb587-86d4-4907-aa5d-9e3a2087abc2/CCTV+Forensics+%7C+Digital+Forensics+%7C+CCTV+Enhancement Articles - Forensic Video Noise Reduction Explained - Make it stand out Figure 4: The Median filter calculates the median value (37) from local histogram, useful to elimination outline values e.g. in case of impulse noise. https://images.squarespace-cdn.com/content/v1/58e9d88d1b10e3a416cec8b3/da5b7c73-dcfb-4f55-b6d2-896409c05a56/Image+Forensics+%7C+Digital+Forensics+%7C+Photo+Forensics Articles - Forensic Video Noise Reduction Explained - Make it stand out Figure 5: Band implementation using threshold, to select outliers (8, 77) for filtering. Only the pixels that are outside the band will be filtered. https://images.squarespace-cdn.com/content/v1/58e9d88d1b10e3a416cec8b3/b41481bb-8755-4ccd-9cea-a25718e419f3/Digital+Forensics+%7C+Multimedia+Forensics+%7C+Photo+Forensics Articles - Forensic Video Noise Reduction Explained - Make it stand out Figure 6: Bilateral filter; the resulting average is determined by the product of spatial and signal weight. This results in the strongest contribution from the pixels close by, excluding outlier values. https://images.squarespace-cdn.com/content/v1/58e9d88d1b10e3a416cec8b3/016b1f57-6808-460a-8c50-3f370e8c9913/Forensics+%7C+CCTV+Forensics+%7C+Digital+Forensics Articles - Forensic Video Noise Reduction Explained - Make it stand out Figure 7: Single image Frame Average, the temporal average for all frames in a video. https://images.squarespace-cdn.com/content/v1/58e9d88d1b10e3a416cec8b3/99490518-7247-4369-b1e1-f468297103d3/Digital+Image+Forensics+%7C+Forensics+%7C+Image+Forensics Articles - Forensic Video Noise Reduction Explained - Make it stand out Figure 8: Constructing a temporally smoothed video. https://www.verdenforensics.com/articles/noise-part-1 monthly 0.5 2026-05-25 https://images.squarespace-cdn.com/content/v1/58e9d88d1b10e3a416cec8b3/1625129654030-4MF3LIM3L8U2MHD4D43B/Digital+Forensics+%7C+Photo+Forensics+%7C+Video+Forensics+%7C+Video+Quality+Improvement Articles - Can Noisy CCTV Footage Be Improved? - Make it stand out Figure 1: Examples of noise, from left to right impulse, pattern and line noise. https://images.squarespace-cdn.com/content/v1/58e9d88d1b10e3a416cec8b3/1625129833358-QF2HZNA8NUTC5FLAV35C/Remove+Noise+%7C+Improve+Video+Quality+%7C+Video+Forensics+Experts Articles - Can Noisy CCTV Footage Be Improved? - Make it stand out Figure 2: Applying a 3x3 kernel to calculate the local average for three subsequent positions in the image https://www.verdenforensics.com/articles/authenticity monthly 0.5 2026-05-25 https://images.squarespace-cdn.com/content/v1/58e9d88d1b10e3a416cec8b3/1615894920648-0M9C9QU1MZ3FHLJGIQU2/image1.JPG Articles - How Forensic Experts Assess Video Authenticity Figure 1: With two button clicks an overview of different filter results is generated https://images.squarespace-cdn.com/content/v1/58e9d88d1b10e3a416cec8b3/1615895029410-WZ4GBGY1SRRHKNXL3W88/image2.JPG Articles - How Forensic Experts Assess Video Authenticity Figure 2: Derived data being visualised https://www.verdenforensics.com/articles/proficiency monthly 0.5 2026-05-25 https://www.verdenforensics.com/articles/de-blur monthly 0.5 2026-05-25 https://images.squarespace-cdn.com/content/v1/58e9d88d1b10e3a416cec8b3/1606835394746-8XOU24IZVNRYTHJGS8QI/Video+Expert Articles - Deblurring CCTV Footage for Criminal and Civil Proceedings https://images.squarespace-cdn.com/content/v1/58e9d88d1b10e3a416cec8b3/1606834443200-B0EW57KWIKUT1K2FB9QV/De-Blur+%7C+Image+Forensics+%7C+Improve+Photo+Quality+%7C+Improve+CCTV Articles - Deblurring CCTV Footage for Criminal and Civil Proceedings Figure 1: Temporal audio signal and its corresponding power spectrum (frequencies). https://images.squarespace-cdn.com/content/v1/58e9d88d1b10e3a416cec8b3/1606834505657-0GK0RA2A1VWHM0X7ZATX/Forensics+%7C+Video+Forensics+%7C+UK+Forensics+%7C+Digital+Forensics Articles - Deblurring CCTV Footage for Criminal and Civil Proceedings Figure 2: Image with a) (vertical) sinus intensity wave and b) corresponding power spectrum. https://images.squarespace-cdn.com/content/v1/58e9d88d1b10e3a416cec8b3/1606834610920-KGG6K6NLI31O5I5XYNVF/Digital+Forensics+%7C+Improve+CCTV+%7C+Video+Quality Articles - Deblurring CCTV Footage for Criminal and Civil Proceedings Figure 3: A natural image (a) and its corresponding power spectrum (b). (c) gives a schematic description of the power spectrum in areas (0)-(3). (0) contains the origin (frequency zero) and low frequencies, (1) the higher horizontal frequencies, (2) the higher vertical frequencies and (3) mainly noise and some high frequencies. https://images.squarespace-cdn.com/content/v1/58e9d88d1b10e3a416cec8b3/1606834791791-EB33W1ZIW13LWZDLPRVZ/Capture.PNG Articles - Deblurring CCTV Footage for Criminal and Civil Proceedings https://images.squarespace-cdn.com/content/v1/58e9d88d1b10e3a416cec8b3/1606834839001-CLI1CQHJ8A54AOHAC0F3/Capture2.PNG Articles - Deblurring CCTV Footage for Criminal and Civil Proceedings https://images.squarespace-cdn.com/content/v1/58e9d88d1b10e3a416cec8b3/1606834881694-IU6K5I2Y9031UU7N1NB1/Capture.PNG Articles - Deblurring CCTV Footage for Criminal and Civil Proceedings https://images.squarespace-cdn.com/content/v1/58e9d88d1b10e3a416cec8b3/1606834923183-YCICAPY3Q95H1XF9Q52S/Video+Enhancement+%7C+Photo+Enhancement Articles - Deblurring CCTV Footage for Criminal and Civil Proceedings Figure 4: Example of a blur streak due to linear motion blur. https://images.squarespace-cdn.com/content/v1/58e9d88d1b10e3a416cec8b3/1606834986227-L5DPG2UECYGA59JWLA84/Forensics+Expert+%7C+Video+Expert Articles - Deblurring CCTV Footage for Criminal and Civil Proceedings Figure 5: example of linear motion de-blur. https://images.squarespace-cdn.com/content/v1/58e9d88d1b10e3a416cec8b3/1606835034984-3PKKGL7KDE0GKMLBFLJX/Forensics+%7C+Digital+Forensics+%7C+Photo+Expert Articles - Deblurring CCTV Footage for Criminal and Civil Proceedings Figure 6: Taxi left front wheel (a) in detail (c), which reveals the linear motion blur present by a subtle blur streak indicated by the Cyan line in (b) and (d). https://images.squarespace-cdn.com/content/v1/58e9d88d1b10e3a416cec8b3/1606835066687-53XBE36IA5UZ2ZK3E0SW/Photo+Forensics Articles - Deblurring CCTV Footage for Criminal and Civil Proceedings Figure 7: the power spectrum of the filter input image of Figure 4. The noise levels are estimated from the area’s outside the red area. https://images.squarespace-cdn.com/content/v1/58e9d88d1b10e3a416cec8b3/1606835087283-XM0M10VZVMMM3TYNQR30/De-Blur Articles - Deblurring CCTV Footage for Criminal and Civil Proceedings Figure 8: de-blur results with (a) original detail, (b),(c) and (d) threshold values of 10, 245 and 1000. https://images.squarespace-cdn.com/content/v1/58e9d88d1b10e3a416cec8b3/1606835123532-M9F06PPSRLDRHDMKDEU2/Photo+Forensics+%7C+UK+Forensics Articles - Deblurring CCTV Footage for Criminal and Civil Proceedings Figure 9: Blur circles due to mis-focus. The Cyan line indicates the diameter of the blur kernel PSF in the image. https://images.squarespace-cdn.com/content/v1/58e9d88d1b10e3a416cec8b3/1606835157907-RCYSCL2ZIMU6AGNL30SR/Video+Forensics+%7C+Improve+Video+Quality Articles - Deblurring CCTV Footage for Criminal and Civil Proceedings Figure 10: Example of a misfocused image. https://images.squarespace-cdn.com/content/v1/58e9d88d1b10e3a416cec8b3/1606835221918-M8GYZ4K1OYVU1F8VZF7G/Photoshop+%7C+Foclar+Impress Articles - Deblurring CCTV Footage for Criminal and Civil Proceedings Figure 11: Example of a complex blur kernel (b) extracted from the blurred image (a). In the result image (c) the blur kernel approximates a single dot (d). https://www.verdenforensics.com/articles/look-up-tables monthly 0.5 2026-05-25 https://images.squarespace-cdn.com/content/v1/58e9d88d1b10e3a416cec8b3/1605092192499-861V493VRG3BDANWGHXS/LUT+%7C+Image+Enhancement+%7C+Video+Enhancement Articles - The Role of Look-Up Tables in Forensic Image Enhancement Figure 1 : Example of a section (0-10) of a LUT that implements adding 10 to each input value to get the output value. https://images.squarespace-cdn.com/content/v1/58e9d88d1b10e3a416cec8b3/1605092372127-FP52IYSPAJIESQP6C2V3/Photo+Enhancement+%7C+Video+Enhancement+%7C+Photo+Forensics Articles - The Role of Look-Up Tables in Forensic Image Enhancement Figure 2: Curves detail window. https://images.squarespace-cdn.com/content/v1/58e9d88d1b10e3a416cec8b3/1605092424216-LXMDDJRKT7UEWN3Q8H49/Look+Up+Tables+%7C+Digital+Forensics+%7C+Digital+Photos+%7C+Enhancement Articles - The Role of Look-Up Tables in Forensic Image Enhancement Figure 3: LUT with linear curves (top) and spline curves (bottom) between the control points. https://www.verdenforensics.com/articles/re-scaling monthly 0.5 2026-05-25 https://images.squarespace-cdn.com/content/v1/58e9d88d1b10e3a416cec8b3/1601539422584-R1HMGHJ5W9JXZDXQS9WW/Interpolation+-+Image+Enhancement+-+CCTV+Enhancement Articles - Re-Scaling CCTV Evidence Figure 1: one dimensional example of interpolation (3x scaling) of data with a) nearest neighbour interpolation and b) linear interpolation. The red-dotted lines show the so-called staircasing effect. https://images.squarespace-cdn.com/content/v1/58e9d88d1b10e3a416cec8b3/1601539464510-E45WNJFMS5IJUKRWG2JW/Photo+Enhancement+-+Improve+Photo+-+Improve+Video+-+Rescaling Articles - Re-Scaling CCTV Evidence Figure 2: two dimensional example of a grey level pixel interpolation (2x scaling) with a) nearest neighbour interpolation and b) bilinear interpolation. The original pixel values are indicated by the blue borders. The red-dotted lines show the so-called staircasing effect. https://images.squarespace-cdn.com/content/v1/58e9d88d1b10e3a416cec8b3/1601539670140-5HYTIP9JXL5YRC6YT280/Interpolation+%7C+Enhancement+%7C+Image+Processing+%7C+Image+Forensics Articles - Re-Scaling CCTV Evidence Table 1: available interpolation techniques in Impress https://images.squarespace-cdn.com/content/v1/58e9d88d1b10e3a416cec8b3/1601539748936-Z7M7PT9B2W3QVL4Y4HGB/Enhancement+%7C+CCTV+Quality+%7C+Improve+CCTV+%7C+Improve+Video+%7C+Video+Forensics Articles - Re-Scaling CCTV Evidence Figure 3: example of scaling: a) original image with region of interest, b)nearest neighbour 10x, c) bilinear 10x and d) Lanczos 10x. https://images.squarespace-cdn.com/content/v1/58e9d88d1b10e3a416cec8b3/1601539831387-5I8A1G1ZLGENL16HP1TT/Photo+Enhancement+%7C+Video+Enhancement+%7C+Photo+Forensics Articles - Re-Scaling CCTV Evidence Figure 4: sharpening is often used to compensate for the blurriness introduced by the scaling. Care should be taken to use the right interpolation in combination with the sharpening as is shown with a) Bilinear and b) Bicubic spline. https://images.squarespace-cdn.com/content/v1/58e9d88d1b10e3a416cec8b3/1601539898946-YGJWCY06NQY4TQSI0A5T/Enhancement+%7C+Processing+%7C+CCTV+Forensics Articles - Re-Scaling CCTV Evidence Figure 5: unlocking the aspect ratio allows the user to set a different scale for the horizontal and vertical axis. On the left the original footage (with ROI) is shown. On the right the aspect ratio corrected image is shown. The scaling filter parameter setting is shown in the bottom-middle. https://www.verdenforensics.com/articles/sharpening monthly 0.5 2026-05-25 https://images.squarespace-cdn.com/content/v1/58e9d88d1b10e3a416cec8b3/1598958898419-68BSRO29M06O5E5GXC1V/Sharpening+%7C+Image+Enhancements+%7C+Image+Forensics+%7C+Video+Forensics Articles - Forensic Image Sharpening in CCTV Analysis Figure 1: Intensity range of the inside of an object is smaller than the range of the border area. https://images.squarespace-cdn.com/content/v1/58e9d88d1b10e3a416cec8b3/1598959107440-ZWDDHCWOVFJRH6UX22CI/Image+Forensics+-+Photo+Forensics+-+Video+Forensics Articles - Forensic Image Sharpening in CCTV Analysis Figure 2: a) original, b) sharpen and c) over-sharpening increasing noise and halo's at the edges of objects. https://images.squarespace-cdn.com/content/v1/58e9d88d1b10e3a416cec8b3/1598959172106-MMCXCIYGOHR1TLKT32EH/Image+Forensics+-+Sharpening+-+Verden+Forensics+-+CCTV+Forensics Articles - Forensic Image Sharpening in CCTV Analysis Figure 3: Unsharp masking filter in Impress. https://images.squarespace-cdn.com/content/v1/58e9d88d1b10e3a416cec8b3/1598959248818-C1LDGHILFWGBF0E6ZEOK/CCTV+Enhancement+%7C+Video+Enhancement+%7C+Video+Forensics Articles - Forensic Image Sharpening in CCTV Analysis Figure 4: (a) and (b) are the original image and detail; (c) and (d) show the effect of the unsharp mask filter on all colours independently; (e) and (f) show the filtering of the luminance signal only, thus preserving the colour. https://images.squarespace-cdn.com/content/v1/58e9d88d1b10e3a416cec8b3/1598959323419-K9TA7PPG59W9HJUADTC5/Video+Forensics+%7C+Forensic+Video+%7C+CCTV+Forensics Articles - Forensic Image Sharpening in CCTV Analysis Figure 5: Contour enhancement filter with variants: Laplace, Mexican Hat, Prewitt and Sobel. (a) Laplace with strength parameter at 100, showing only the contours in the image. (b) strength parameter at 50, where mixing with the original image restores the object colours. https://www.verdenforensics.com/articles/contrast-adjustments monthly 0.5 2026-05-25 https://images.squarespace-cdn.com/content/v1/58e9d88d1b10e3a416cec8b3/1596461126567-L883QH1BW6Y0V78XETSO/Video+Enhancement+%7C+Improve+Video+%7C+Video+Quality+%7C+Brighten+Video Articles - Improving Contrast in Video Forensics Figure 1: Top row: Original image and histogram with linear contrast mapping function. Bottom row: Enhanced image and histogram. https://images.squarespace-cdn.com/content/v1/58e9d88d1b10e3a416cec8b3/1596461270378-I3002NCSOXIOPCSAHXOU/Equ.PNG Articles - Improving Contrast in Video Forensics https://images.squarespace-cdn.com/content/v1/58e9d88d1b10e3a416cec8b3/1596461344419-M0ED5OK5HQFFINXPK0H1/Photo+Enhancement+%7C+Photo+Forensics+%7C+CCTV+Enhancement Articles - Improving Contrast in Video Forensics Figure 2: Gamma enhancement for different parameter values of gamma, with the filtered images on the left and histogram pertaining to each on the far right. The central column shows the mapping T used. https://images.squarespace-cdn.com/content/v1/58e9d88d1b10e3a416cec8b3/1596461426529-UUBRD8ECIQZXEH52W1SX/Equalisation+%7C+Improve+Video+Quality+%7C+Improve+Photo+Quality Articles - Improving Contrast in Video Forensics Figure 3: Top left: Original image, Lower left: Output image, Top right: Original histogram and mapping function T, Bottom right: Equalised (flat) histogram of the output. https://www.verdenforensics.com/articles/brightness-adjustments monthly 0.5 2026-05-25 https://images.squarespace-cdn.com/content/v1/58e9d88d1b10e3a416cec8b3/1593599102568-1Z7QMHEF7774FA74QTRQ/Image+Forensics+%7C+Photo+Forensics+%7C+Photo+Analysis+%7C+Imagery+Analysis+%7C Articles - Improving Dark Video Evidence Figure 1: Optical colour illusion. Both circles (RGB=(209,134,0)) and the squares containing them (RGB=(112,112,112)) are the exact same colour. https://images.squarespace-cdn.com/content/v1/58e9d88d1b10e3a416cec8b3/1593599204722-SESJP7U9SCM7QT9Y3I17/Forensics+%7C+Photoshopping+%7C+Enhancement+%7C+Photo+Enhancement+%7C+Video+Enhancement Articles - Improving Dark Video Evidence Figure 2: The red stripe appears brighter and more colourful in the light than in the shadow. The bottom right rectangle is more dominant than the bottom left rectangle in perception. https://images.squarespace-cdn.com/content/v1/58e9d88d1b10e3a416cec8b3/1593599281718-V4BYLDW708J2BCU3RG3V/Form.PNG Articles - Improving Dark Video Evidence https://images.squarespace-cdn.com/content/v1/58e9d88d1b10e3a416cec8b3/1593599417603-BHB68IDL81K7XEIUO6P2/Photo+Enhancement+%7C+Video+Enhancement+%7C+Improve+CCTV+%7C+CCTV+Enhancement Articles - Improving Dark Video Evidence Figure 3: Top left: an original dark image, Top right: contrast and brightness adjusted image, showing very bright and dominant lights through glasses of door and windows. Bottom left: a crop of the original image with low brightness. Bottom right: a crop of the top right image, but without the overexposure resulting in focus on the window only. https://images.squarespace-cdn.com/content/v1/58e9d88d1b10e3a416cec8b3/1593599496639-T9E6PVTDQSTGYN7MNPLX/Dark+CCTV+%7C+Dark+Photos+%7C+Dark+Video+%7C+improve Articles - Improving Dark Video Evidence Figure 4: Contrast and brightness adjustment in Impress combining the image and histogram comparison. https://images.squarespace-cdn.com/content/v1/58e9d88d1b10e3a416cec8b3/1593599553733-W3MCP7OWNSG8UXPB61TJ/Imagery+Enhancement+%7C+Image+Histogram+%7C+Video+Histogram Articles - Improving Dark Video Evidence Figure 5: Left: input histogram of the total image. Right: adjusting the brightness using an Roi parameter ON, to get the input histogram of the region of interest only. https://www.verdenforensics.com/articles/white-balance monthly 0.5 2026-05-25 https://images.squarespace-cdn.com/content/v1/58e9d88d1b10e3a416cec8b3/1591006709517-4Q43TPBBK9EPR6Y6NYME/RGB+Colour+-+HSI+Colour+-+Image+Forensics+-+Image+Enhancement Articles - How Lighting and Colour Affect CCTV Footage Figure 1. Left: RGB colour system characterising a specific colour with three coordinate numbers. Right: In the cylindrical-shaped HSI colour system the same colour is also characterised with three numbers, where intensity is the height above the base plane, saturation the radius length of the circle in the base plane and hue is the angle coordinate. https://images.squarespace-cdn.com/content/v1/58e9d88d1b10e3a416cec8b3/1591006806010-C52ERYGF1WUXGZXX9LC3/Video+Forensics+-+Video+Enhancement+-+Photo+Forensics Articles - How Lighting and Colour Affect CCTV Footage Figure 2. Top: the same colour image with different corrections of hue applied (H=0° is the original image). The images with values 180° and -180° are identical, consistent with the symmetry of an angular coordinate. Middle: the same for Saturation (S=100 is the original image). Bottom: the same for Intensity (I=100 is the original image). https://images.squarespace-cdn.com/content/v1/58e9d88d1b10e3a416cec8b3/1591007152046-O47P5B47IC37BMMSM4NN/Image+Enhancement+-+CCTV+Enhancement+-+Video+Enhancement Articles - How Lighting and Colour Affect CCTV Footage Figure 3: Adjust hue and check the effect with the colour picker tool. https://images.squarespace-cdn.com/content/v1/58e9d88d1b10e3a416cec8b3/1591007220309-2UC32DNGNHKGT8EYZ2R0/Image+forensics+-+video+forensics+-+CCTV+forensics Articles - How Lighting and Colour Affect CCTV Footage Figure 4: The white balance correction filter. It is known that the lampshade in the image is near white (or grey) in perfect lighting conditions. To correct the white balance, click the droplet icon next to the ‘Pick’ parameter and subsequently click on the lampshade in the left image. https://images.squarespace-cdn.com/content/v1/58e9d88d1b10e3a416cec8b3/1591007287442-VT14N0SCZRQ49B0FO1LH/Video+Forensics+-+Luminance+-+RGB Articles - How Lighting and Colour Affect CCTV Footage Table 1: Example of the effect of the Luminance parameter on white balance result (Y=luminance level). https://images.squarespace-cdn.com/content/v1/58e9d88d1b10e3a416cec8b3/1591007342010-J4XOS51WGNB5TW7FEGQL/Image+Forensics+-+Video+Forensics Articles - How Lighting and Colour Affect CCTV Footage Figure 5: From left to right: the original, white balance result with luminance correction OFF and ON. https://www.verdenforensics.com/articles/histogram-normalisation monthly 0.5 2026-05-25 https://images.squarespace-cdn.com/content/v1/58e9d88d1b10e3a416cec8b3/1588341415103-4P3HV4DMSF5B1HSXQSBV/Image+Forensics+%7C+Digital+Forensics+%7C+Forensics+Blog Articles - Histogram Normalisation in Forensic Video Enhancement Figure 1: An example of a histogram with a skewed histogram distribution. https://images.squarespace-cdn.com/content/v1/58e9d88d1b10e3a416cec8b3/1588341578339-LRCEQIBX9WJMBA9JHZT7/Underexposed+Photo+-+Digital+Forensics Articles - Histogram Normalisation in Forensic Video Enhancement Figure 2: Image pertaining to the histogram within Figure 1. https://images.squarespace-cdn.com/content/v1/58e9d88d1b10e3a416cec8b3/1588341884278-LAWLG6X7ZIGWUHV0PLGM/Image+Forensics Articles - Histogram Normalisation in Forensic Video Enhancement https://images.squarespace-cdn.com/content/v1/58e9d88d1b10e3a416cec8b3/1588342031421-5H340L65RJBEJE5YAA2L/Histogram+%7C+Foclar+Impress+%7C+Image+Forensics Articles - Histogram Normalisation in Forensic Video Enhancement https://images.squarespace-cdn.com/content/v1/58e9d88d1b10e3a416cec8b3/1588342068532-QDU9ER15KPVC18LINABN/Verden+Forensics+%7C+Foclar+Impress Articles - Histogram Normalisation in Forensic Video Enhancement Figure 3: Example of the stretch distribution applied to the original dark image (top left) with it's corresponding histogram (top right) and the resulting processed image (bottom left) with it's corresponding histogram (bottom right) https://images.squarespace-cdn.com/content/v1/58e9d88d1b10e3a416cec8b3/1588342132398-EMDLN5SF6MAX9IK8YIFV/Foclar+Impress+%7C+Image+Forensics+%7C+Photo+Forensics+%7C+Experts Articles - Histogram Normalisation in Forensic Video Enhancement Figure 4: Curves filter to manually adjust the level adjustments. The skewed histogram in the detail window (bottom left) originates from the selected region of interest (red rectangle at the top). 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