ShowChannels() v0.09 - 15 Jan 2019

[jmac698]

I've tested all of the vectorscopes, they're calculated wrong. A pure atan2(u,v) doesn't cut it. There range of hues is a hexagon with different scaled axis. You have to account for the scaling to get a true hue.

[jmac698]

So what else are you up to in the plugin dept.? I'm looking forward to it
I've been too busy to make new plugins, but yeah I was doing a few a week last July

[StainlessS]

These suggestion were certainly not critical

I know.

1st line of doc:

Simple plugin whose only function is to display the average Y,U and V

Was never meant for anything other than to assist with simple mods using ColorYUV, eg off_u and off_v for color cast correction.

Written previously in thread:

For accumulated Ave luma, I would think that gamma might have to be taken into consideration, it tends to be lower
than 128 for YUV. EDIT: or 126 for mid point of 16-235

Any idea how to generate a BellJar random distribution curve ? (probably not the correct term).

No idea what CCW and CW are, best guess is Celebrity Championship Wrestling, or Carrying Concealed Weapon, although I did initially think Clockwise,
Counter Clockwise.

What I'm I wanting to do, well a number of things keep getting pushed back, including mods to both DGIndex and MeGUI Batchers,
investigation field order, interlace/ivtc detection, and other infos useful in autonomous conversion script. RoboCrop auto crop and auto
levels setting plug. Perhaps MediaInfo implemented as plug.
Investigate implement Avisynth Script Editor from VDMod into latest version VD (perhaps beyond me, or too time consuming).
+ lots more.

I'm always happier doing what I want, and is usually where my better ideas surface.

[jmac698]

Hmm, the luma gamma of 2.2 already approxmiates the power curve of the eye response, so it's generally ok as is. I think what you're trying to get at is a perceptually uniform percentage measurement. This would be accomplished by measuring the L of L a* b*. It certainly can be converted internally, but it's gonna be a bit slow as it needs several floating point ops.

As for, do you really want to do this - yes, I think most filters want to operate on a perceptually uniform domain, but not all. Some exception include, gamma-aware resizing (and interpolation etc.), and perceptual masking.

As for the luma distribution of natural objects, I believe they follow the Phong illumination model. Highlights are a raised cosine, diffuse is a cosine, and ambient is a constant, so I don't think the histogram follows a Gaussian Normal Distribution (aka "Bell Curve") as you propose.

Interestingly, if you take the inverse Phong, you can deduce the angle a surface is based on how it's shaded, which leads to a way to create a 3d model from a single photo. There's far better ways to do this though, like projecting a pattern onto the object, using lidar, or using multiple views.

Oh, a Bell jar is a shape to contain high pressure, like a vacuum jar, I think. It's a different shape; the Bell curve could refer to a Mr. Bell, but I think it's the shape of a bell that you ring, and that shape is designed to resonate and amplify sound. As I recall, sound is best amplified by a log shape.. the classic horn design. It's the most efficient speaker shape. Blah blah balh

[StainlessS]

Thanks for that jmac, and yep, I meant "Bell" rather than "BellJar".

I've done some tests on 320MB chunks of test vobs cut from somewhere in middle of a DVD vob,
clip lengths vary from about 8 mins to 15 mins depending on eg bitrate and number of audio channels etc.
Results are Accumulated values for the entire clips, just to show typical results that might be expected.

EDIT: The clips were all auto cropped and auto leveled prior to ShowChannels(), hence 16 -> 235 Y range.

NTSC_Top_FORCEFILM-ReturnOfTheKing.d2v
    AVE_Y=71.12   MIN_Y= 16  MAX_Y=235  LMIN_Y= 16  LMAX_Y=235
    AVE_U=127.22  MIN_U= 62  MAX_U=168  LMIN_U= 78  LMAX_U=158
    AVE_V=126.63  MIN_V= 74  MAX_V=188  LMIN_V= 78  LMAX_V=174

PAL_I_Top_169_P-FellowshipOfTheRings_Extended.d2v
    AVE_Y=70.31   MIN_Y= 16  MAX_Y=235  LMIN_Y= 16  LMAX_Y=235
    AVE_U=119.82  MIN_U= 54  MAX_U=178  LMIN_U= 77  LMAX_U=166
    AVE_V=132.89  MIN_V= 82  MAX_V=190  LMIN_V=103  LMAX_V=183

PAL_I_Top_169_P-TwoTowers_Extended.d2v
    AVE_Y=72.33   MIN_Y= 16  MAX_Y=235  LMIN_Y= 16  LMAX_Y=235
    AVE_U=129.66  MIN_U= 63  MAX_U=159  LMIN_U= 70  LMAX_U=153
    AVE_V=124.38  MIN_V= 87  MAX_V=226  LMIN_V= 93  LMAX_V=201

PAL-P_169_P-ReturnOfTheKing_Extended.d2v
    AVE_Y=98.68   MIN_Y= 16  MAX_Y=235  LMIN_Y= 16  LMAX_Y=235
    AVE_U=122.03  MIN_U= 73  MAX_U=144  LMIN_U= 88  LMAX_U=137
    AVE_V=131.77  MIN_V=102  MAX_V=183  LMIN_V=117  LMAX_V=164

PAL_I_Top_169_P-LordOfTheRings_Symphony.d2v
    AVE_Y=56.30   MIN_Y= 16  MAX_Y=235  LMIN_Y= 16  LMAX_Y=235
    AVE_U=130.30  MIN_U= 33  MAX_U=249  LMIN_U= 73  LMAX_U=220
    AVE_V=129.64  MIN_V=  6  MAX_V=248  LMIN_V= 29  LMAX_V=204

PAL_I_Top_169_P-DieHard.d2v
    AVE_Y=51.19   MIN_Y= 16  MAX_Y=235  LMIN_Y= 16  LMAX_Y=235
    AVE_U=122.70  MIN_U= 55  MAX_U=220  LMIN_U= 77  LMAX_U=172
    AVE_V=134.51  MIN_V= 32  MAX_V=248  LMIN_V= 60  LMAX_V=191

PAL_I_Top_169_P-DieHard_2.d2v
    AVE_Y=55.67   MIN_Y= 16  MAX_Y=235  LMIN_Y= 16  LMAX_Y=235
    AVE_U=126.27  MIN_U= 56  MAX_U=196  LMIN_U= 69  LMAX_U=172
    AVE_V=129.37  MIN_V= 53  MAX_V=216  LMIN_V= 65  LMAX_V=183

PAL-I-Top_169_P-DieHard_3.d2v
    AVE_Y=95.52   MIN_Y= 16  MAX_Y=235  LMIN_Y= 16  LMAX_Y=235
    AVE_U=123.56  MIN_U= 62  MAX_U=173  LMIN_U= 81  LMAX_U=154
    AVE_V=136.44  MIN_V= 75  MAX_V=237  LMIN_V= 93  LMAX_V=209

PAL_I_Top_43_Hybrid-StarTrekNG_1_TooShortASeason.d2v
    AVE_Y=60.59   MIN_Y= 16  MAX_Y=235  LMIN_Y= 16  LMAX_Y=235
    AVE_U=127.39  MIN_U=  1  MAX_U=209  LMIN_U=107  LMAX_U=180
    AVE_V=136.72  MIN_V=  1  MAX_V=203  LMIN_V= 96  LMAX_V=191

PAL_I_Top_43_Hybrid-StarTrekNG_2_WhenTheBoughBreaks.d2v
    AVE_Y=52.47   MIN_Y= 16  MAX_Y=235  LMIN_Y= 16  LMAX_Y=235
    AVE_U=126.70  MIN_U= 52  MAX_U=210  LMIN_U= 59  LMAX_U=173
    AVE_V=135.38  MIN_V= 45  MAX_V=195  LMIN_V=105  LMAX_V=189

PAL_I_Top_43_Hybrid-StarTrekNG_3_HomeSoil.d2v
    AVE_Y=51.29   MIN_Y= 16  MAX_Y=235  LMIN_Y= 16  LMAX_Y=235
    AVE_U=128.48  MIN_U= 61  MAX_U=207  LMIN_U= 88  LMAX_U=188
    AVE_V=131.68  MIN_V=  0  MAX_V=255  LMIN_V=106  LMAX_V=178

PAL_I_Top_169_P-Godfather.d2v
    AVE_Y=50.64   MIN_Y= 16  MAX_Y=235  LMIN_Y= 16  LMAX_Y=235
    AVE_U=121.47  MIN_U= 46  MAX_U=188  LMIN_U= 68  LMAX_U=144
    AVE_V=134.98  MIN_V= 71  MAX_V=214  LMIN_V=101  LMAX_V=190

PAL_I_Top_169_P-Godfather_2.d2v
    AVE_Y=62.44   MIN_Y= 16  MAX_Y=235  LMIN_Y= 16  LMAX_Y=235
    AVE_U=119.61  MIN_U= 72  MAX_U=180  LMIN_U= 80  LMAX_U=151
    AVE_V=136.48  MIN_V= 78  MAX_V=179  LMIN_V=115  LMAX_V=169

PAL_I_Top_169_P-Godfather_3.d2v
    AVE_Y=57.43   MIN_Y= 16  MAX_Y=235  LMIN_Y= 16  LMAX_Y=235
    AVE_U=118.46  MIN_U= 47  MAX_U=188  LMIN_U= 82  LMAX_U=186
    AVE_V=137.32  MIN_V= 76  MAX_V=206  LMIN_V= 91  LMAX_V=200

PAL_I_Bot_43-BustyCops.d2v
    AVE_Y=122.60  MIN_Y= 16  MAX_Y=235  LMIN_Y= 16  LMAX_Y=235
    AVE_U=118.15  MIN_U= 32  MAX_U=255  LMIN_U= 62  LMAX_U=167
    AVE_V=139.79  MIN_V= 48  MAX_V=246  LMIN_V= 92  LMAX_V=221

PAL_I_Bot_169_P-FalseBadFieldOrder-FlightPlan.d2v
    AVE_Y=58.96   MIN_Y= 16  MAX_Y=235  LMIN_Y= 16  LMAX_Y=235
    AVE_U=128.46  MIN_U=  0  MAX_U=255  LMIN_U= 90  LMAX_U=167
    AVE_V=125.02  MIN_V=  0  MAX_V=255  LMIN_V= 61  LMAX_V=182

PAL_I_Top_43_I-GirlIn3D.d2v
    AVE_Y=60.73   MIN_Y= 16  MAX_Y=235  LMIN_Y= 16  LMAX_Y=235
    AVE_U=124.27  MIN_U= 50  MAX_U=222  LMIN_U= 63  LMAX_U=213
    AVE_V=129.07  MIN_V= 47  MAX_V=232  LMIN_V= 60  LMAX_V=205

PAL_I_Top_43_I-SocialClimber.d2v
    AVE_Y=85.46   MIN_Y= 16  MAX_Y=235  LMIN_Y= 16  LMAX_Y=235
    AVE_U=120.87  MIN_U= 30  MAX_U=212  LMIN_U= 56  LMAX_U=192
    AVE_V=136.94  MIN_V= 89  MAX_V=212  LMIN_V= 97  LMAX_V=194

PAL_I_Top_43_I-UltimateLimit.d2v
    AVE_Y=52.55   MIN_Y= 16  MAX_Y=235  LMIN_Y= 16  LMAX_Y=235
    AVE_U=128.92  MIN_U= 31  MAX_U=189  LMIN_U= 51  LMAX_U=183
    AVE_V=129.58  MIN_V= 82  MAX_V=212  LMIN_V= 92  LMAX_V=193

PAL_I_Top_43_P-ArtificialTelepathy.d2v
    AVE_Y=89.88   MIN_Y= 16  MAX_Y=235  LMIN_Y= 16  LMAX_Y=235
    AVE_U=128.38  MIN_U=  0  MAX_U=218  LMIN_U= 68  LMAX_U=207
    AVE_V=126.38  MIN_V=  0  MAX_V=217  LMIN_V= 44  LMAX_V=200

PAL_I_Top_43_P-AssaultOnPrecinct13.d2v
    AVE_Y=60.04   MIN_Y= 16  MAX_Y=235  LMIN_Y= 16  LMAX_Y=235
    AVE_U=129.02  MIN_U=  0  MAX_U=173  LMIN_U= 85  LMAX_U=157
    AVE_V=123.97  MIN_V=  0  MAX_V=215  LMIN_V= 74  LMAX_V=188

PAL_I_Top_43_P-Cabaret.d2v
    AVE_Y=44.20   MIN_Y= 16  MAX_Y=235  LMIN_Y= 16  LMAX_Y=235
    AVE_U=126.85  MIN_U=  1  MAX_U=254  LMIN_U= 73  LMAX_U=232
    AVE_V=130.97  MIN_V= 30  MAX_V=253  LMIN_V= 81  LMAX_V=210

PAL_I_Top_43_P-FourPlay.d2v
    AVE_Y=72.80   MIN_Y= 16  MAX_Y=235  LMIN_Y= 16  LMAX_Y=235
    AVE_U=124.06  MIN_U= 69  MAX_U=190  LMIN_U= 90  LMAX_U=170
    AVE_V=130.90  MIN_V= 65  MAX_V=205  LMIN_V= 75  LMAX_V=191

PAL_I_Top_43_P-GoingOverboard.d2v
    AVE_Y=104.08  MIN_Y= 16  MAX_Y=235  LMIN_Y= 16  LMAX_Y=235
    AVE_U=127.27  MIN_U= 53  MAX_U=188  LMIN_U= 76  LMAX_U=161
    AVE_V=129.42  MIN_V= 42  MAX_V=221  LMIN_V= 82  LMAX_V=203

PAL_I_Top_43_P-GroundControl.d2v
    AVE_Y=57.19   MIN_Y= 16  MAX_Y=235  LMIN_Y= 16  LMAX_Y=235
    AVE_U=126.20  MIN_U=  0  MAX_U=255  LMIN_U= 84  LMAX_U=187
    AVE_V=132.69  MIN_V= 19  MAX_V=211  LMIN_V= 36  LMAX_V=201

PAL_I_Top_43_P-Panic.d2v
    AVE_Y=64.10   MIN_Y= 16  MAX_Y=235  LMIN_Y= 16  LMAX_Y=235
    AVE_U=124.26  MIN_U= 37  MAX_U=179  LMIN_U= 87  LMAX_U=159
    AVE_V=130.67  MIN_V= 67  MAX_V=203  LMIN_V=107  LMAX_V=189

PAL_I_Top_169_P-AllTheQueensMen.d2v
    AVE_Y=75.95   MIN_Y= 16  MAX_Y=235  LMIN_Y= 16  LMAX_Y=235
    AVE_U=126.43  MIN_U= 25  MAX_U=190  LMIN_U= 42  LMAX_U=183
    AVE_V=126.32  MIN_V= 81  MAX_V=238  LMIN_V= 95  LMAX_V=227

PAL_I_Top_169_P-DuskTillDawn.d2v
    AVE_Y=54.26   MIN_Y= 16  MAX_Y=235  LMIN_Y= 16  LMAX_Y=235
    AVE_U=121.26  MIN_U= 56  MAX_U=191  LMIN_U= 61  LMAX_U=183
    AVE_V=137.11  MIN_V= 82  MAX_V=219  LMIN_V= 95  LMAX_V=203

PAL_I_Top_169_P-EducatingRita.d2v
    AVE_Y=74.65   MIN_Y= 16  MAX_Y=235  LMIN_Y= 16  LMAX_Y=235
    AVE_U=125.96  MIN_U= 71  MAX_U=167  LMIN_U= 99  LMAX_U=156
    AVE_V=127.71  MIN_V= 99  MAX_V=177  LMIN_V=108  LMAX_V=161

PAL_I_Top_169_P-HarryPotter-DeathlyHallows2.d2v
    AVE_Y=56.44   MIN_Y= 16  MAX_Y=235  LMIN_Y= 16  LMAX_Y=235
    AVE_U=123.50  MIN_U=  0  MAX_U=255  LMIN_U=102  LMAX_U=140
    AVE_V=128.86  MIN_V= 82  MAX_V=165  LMIN_V=105  LMAX_V=151

PAL_I_Top_169_P-JurassicPark.d2v
    AVE_Y= 91.04  MIN_Y= 16  MAX_Y=235  LMIN_Y= 16  LMAX_Y=235
    AVE_U=125.36  MIN_U=  3  MAX_U=206  LMIN_U= 89  LMAX_U=169
    AVE_V=134.81  MIN_V=  3  MAX_V=238  LMIN_V=101  LMAX_V=196

PAL_I_Top_169_P-LastSign.d2v
    AVE_Y=60.97   MIN_Y= 16  MAX_Y=235  LMIN_Y= 16  LMAX_Y=235
    AVE_U=125.24  MIN_U= 44  MAX_U=244  LMIN_U= 55  LMAX_U=219
    AVE_V=128.43  MIN_V= 76  MAX_V=249  LMIN_V= 97  LMAX_V=174

PAL_I_Top_169_P-LegallyBlond.d2v
    AVE_Y=69.96   MIN_Y= 16  MAX_Y=235  LMIN_Y= 16  LMAX_Y=235
    AVE_U=123.08  MIN_U= 42  MAX_U=214  LMIN_U= 63  LMAX_U=197
    AVE_V=136.82  MIN_V= 43  MAX_V=241  LMIN_V= 59  LMAX_V=222

PAL_I_Top_169_P-MillionDollarBaby.d2v
    AVE_Y=74.50   MIN_Y= 16  MAX_Y=235  LMIN_Y= 16  LMAX_Y=235
    AVE_U=124.28  MIN_U=  0  MAX_U=255  LMIN_U= 85  LMAX_U=152
    AVE_V=124.73  MIN_V=  0  MAX_V=255  LMIN_V= 95  LMAX_V=157

PAL_I_Top_169_P-ResidentEvil_Apocalypse.d2v
    AVE_Y=58.35   MIN_Y= 16  MAX_Y=235  LMIN_Y= 16  LMAX_Y=235
    AVE_U=136.48  MIN_U= 20  MAX_U=191  LMIN_U= 63  LMAX_U=181
    AVE_V=118.23  MIN_V= 23  MAX_V=215  LMIN_V= 40  LMAX_V=195

PAL_I_Top_169_P-ShawshankRedemption.d2v
    AVE_Y=65.69   MIN_Y= 16  MAX_Y=235  LMIN_Y= 16  LMAX_Y=235
    AVE_U=126.15  MIN_U= 35  MAX_U=251  LMIN_U=100  LMAX_U=159
    AVE_V=129.75  MIN_V= 45  MAX_V=251  LMIN_V=100  LMAX_V=164

PAL_I_Top_169_P-Spiderman.d2v
    AVE_Y=74.89   MIN_Y= 16  MAX_Y=235  LMIN_Y= 16  LMAX_Y=235
    AVE_U=123.81  MIN_U=  1  MAX_U=216  LMIN_U= 83  LMAX_U=189
    AVE_V=135.67  MIN_V=  1  MAX_V=231  LMIN_V= 48  LMAX_V=202

PAL_I_Top_169_P-SweetestThing.d2v
    AVE_Y=64.76   MIN_Y= 16  MAX_Y=235  LMIN_Y= 16  LMAX_Y=235
    AVE_U=120.72  MIN_U=  1  MAX_U=254  LMIN_U= 48  LMAX_U=201
    AVE_V=136.83  MIN_V=  1  MAX_V=254  LMIN_V= 71  LMAX_V=221

PAL_I_Top_169_P-XXX-TheNextLevel.d2v
    AVE_Y=77.01   MIN_Y= 16  MAX_Y=235  LMIN_Y= 16  LMAX_Y=235
    AVE_U=128.31  MIN_U= 37  MAX_U=192  LMIN_U= 55  LMAX_U=181
    AVE_V=125.04  MIN_V= 36  MAX_V=219  LMIN_V= 63  LMAX_V=205

PAL_I_Top_169_I-LoveOnTheSide(Weird mix I and P).d2v
    AVE_Y=73.29   MIN_Y= 16  MAX_Y=235  LMIN_Y= 16  LMAX_Y=235
    AVE_U=122.95  MIN_U= 68  MAX_U=203  LMIN_U= 78  LMAX_U=193
    AVE_V=136.01  MIN_V= 60  MAX_V=225  LMIN_V= 76  LMAX_V=220

PAL-I-Top_169_P-MissionImpossible_2.d2v
    AVE_Y=76.59   MIN_Y= 16  MAX_Y=235  LMIN_Y= 16  LMAX_Y=235
    AVE_U=125.45  MIN_U=  3  MAX_U=199  LMIN_U= 56  LMAX_U=187
    AVE_V=132.29  MIN_V= 34  MAX_V=232  LMIN_V= 47  LMAX_V=198

PAL-I-Top_169_P-ResevoirDogs.d2v
    AVE_Y=70.37   MIN_Y= 16  MAX_Y=235  LMIN_Y= 16  LMAX_Y=235
    AVE_U=124.45  MIN_U= 42  MAX_U=191  LMIN_U= 69  LMAX_U=181
    AVE_V=131.47  MIN_V= 32  MAX_V=234  LMIN_V= 88  LMAX_V=206

PAL-I-Top_169_P-Unbreakable.d2v
    AVE_Y=47.84   MIN_Y= 16  MAX_Y=235  LMIN_Y= 16  LMAX_Y=235
    AVE_U=128.94  MIN_U= 59  MAX_U=207  LMIN_U= 88  LMAX_U=182
    AVE_V=126.05  MIN_V= 41  MAX_V=207  LMIN_V= 82  LMAX_V=165

PAL-P_169_P-AeonFlux.d2v
    AVE_Y=64.54   MIN_Y= 16  MAX_Y=235  LMIN_Y= 16  LMAX_Y=235
    AVE_U=123.49  MIN_U= 36  MAX_U=164  LMIN_U= 59  LMAX_U=158
    AVE_V=131.04  MIN_V= 67  MAX_V=199  LMIN_V= 80  LMAX_V=187

PAL-P_169_P-Alexander.d2v
    AVE_Y=93.62   MIN_Y= 16  MAX_Y=235  LMIN_Y= 16  LMAX_Y=235
    AVE_U=121.21  MIN_U= 35  MAX_U=186  LMIN_U= 60  LMAX_U=168
    AVE_V=134.59  MIN_V= 63  MAX_V=218  LMIN_V= 95  LMAX_V=186

PAL-P_169_P-BodyGuard.d2v
    AVE_Y=59.37   MIN_Y= 16  MAX_Y=235  LMIN_Y= 16  LMAX_Y=235
    AVE_U=130.49  MIN_U= 58  MAX_U=226  LMIN_U= 68  LMAX_U=207
    AVE_V=129.52  MIN_V= 60  MAX_V=212  LMIN_V= 84  LMAX_V=207

PAL-P_169_P-DownWithLove.d2v
    AVE_Y=72.96   MIN_Y= 16  MAX_Y=235  LMIN_Y= 16  LMAX_Y=235
    AVE_U=122.13  MIN_U=  6  MAX_U=200  LMIN_U= 14  LMAX_U=188
    AVE_V=132.64  MIN_V= 70  MAX_V=209  LMIN_V= 80  LMAX_V=183

PAL-P_169_P-Gladiator.d2v
    AVE_Y=69.03   MIN_Y= 16  MAX_Y=235  LMIN_Y= 16  LMAX_Y=235
    AVE_U=123.12  MIN_U= 50  MAX_U=168  LMIN_U= 64  LMAX_U=162
    AVE_V=134.22  MIN_V= 90  MAX_V=225  LMIN_V= 99  LMAX_V=211

PAL-P_169_P-Hannibal.d2v
    AVE_Y=61.85   MIN_Y= 16  MAX_Y=235  LMIN_Y= 16  LMAX_Y=235
    AVE_U=132.80  MIN_U= 90  MAX_U=202  LMIN_U=106  LMAX_U=179
    AVE_V=124.39  MIN_V= 84  MAX_V=220  LMIN_V= 92  LMAX_V=189

PAL-P_169_P-HitchhikersGuideToTheGalaxy_Movie.d2v
    AVE_Y=113.73  MIN_Y= 16  MAX_Y=235  LMIN_Y= 16  LMAX_Y=235
    AVE_U=121.45  MIN_U= 40  MAX_U=198  LMIN_U= 55  LMAX_U=181
    AVE_V=134.68  MIN_V= 27  MAX_V=228  LMIN_V= 47  LMAX_V=213

PAL-P_169_P-HuntForRedOctober.d2v
    AVE_Y=49.98   MIN_Y= 16  MAX_Y=235  LMIN_Y= 16  LMAX_Y=235
    AVE_U=127.82  MIN_U= 71  MAX_U=224  LMIN_U= 86  LMAX_U=210
    AVE_V=131.32  MIN_V= 70  MAX_V=234  LMIN_V= 81  LMAX_V=223

PAL-P_169_P-ItalianJob_2.d2v
    AVE_Y=71.63   MIN_Y= 16  MAX_Y=235  LMIN_Y= 16  LMAX_Y=235
    AVE_U=128.50  MIN_U=  5  MAX_U=251  LMIN_U= 71  LMAX_U=169
    AVE_V=127.32  MIN_V=  5  MAX_V=251  LMIN_V= 65  LMAX_V=225

PAL-P_169_P-SinCity.d2v
    AVE_Y=55.55   MIN_Y= 16  MAX_Y=235  LMIN_Y= 16  LMAX_Y=235
    AVE_U=127.57  MIN_U=102  MAX_U=176  LMIN_U=113  LMAX_U=161
    AVE_V=128.48  MIN_V= 48  MAX_V=176  LMIN_V= 58  LMAX_V=145

PAL-P_169_P-TombRaider.d2v
    AVE_Y=55.56   MIN_Y= 16  MAX_Y=235  LMIN_Y= 16  LMAX_Y=235
    AVE_U=126.50  MIN_U= 70  MAX_U=219  LMIN_U= 91  LMAX_U=194
    AVE_V=130.88  MIN_V= 73  MAX_V=234  LMIN_V= 84  LMAX_V=207

PAL-P_169_P-TombRaider_CradleOfLife.d2v
    AVE_Y=49.62   MIN_Y= 16  MAX_Y=235  LMIN_Y= 16  LMAX_Y=235
    AVE_U=124.05  MIN_U= 32  MAX_U=191  LMIN_U= 82  LMAX_U=186
    AVE_V=134.29  MIN_V= 68  MAX_V=239  LMIN_V=104  LMAX_V=224

PAL-P_169_P-UnderworldEvolution.d2v
    AVE_Y=39.20   MIN_Y= 16  MAX_Y=235  LMIN_Y= 16  LMAX_Y=235
    AVE_U=129.71  MIN_U= 37  MAX_U=164  LMIN_U= 69  LMAX_U=158
    AVE_V=125.12  MIN_V= 58  MAX_V=190  LMIN_V= 70  LMAX_V=172

PAL-P_169_P-VanHelsing.d2v
    AVE_Y=75.26   MIN_Y= 16  MAX_Y=235  LMIN_Y= 16  LMAX_Y=235
    AVE_U=137.14  MIN_U= 58  MAX_U=170  LMIN_U=103  LMAX_U=161
    AVE_V=123.96  MIN_V= 97  MAX_V=201  LMIN_V=107  LMAX_V=173

PAL-P_169_P-WarOfTheWorlds.d2v
    AVE_Y=80.80   MIN_Y= 16  MAX_Y=235  LMIN_Y= 16  LMAX_Y=235
    AVE_U=122.47  MIN_U= 58  MAX_U=191  LMIN_U= 75  LMAX_U=186
    AVE_V=130.60  MIN_V= 64  MAX_V=205  LMIN_V= 71  LMAX_V=185

PAL-P_169_P-XMen_2.d2v
    AVE_Y=50.75   MIN_Y= 16  MAX_Y=235  LMIN_Y= 16  LMAX_Y=235
    AVE_U=129.09  MIN_U=  0  MAX_U=255  LMIN_U= 73  LMAX_U=189
    AVE_V=121.72  MIN_V=  0  MAX_V=255  LMIN_V= 44  LMAX_V=192

PAL-P_169_P-TimeMachine.d2v
    AVE_Y=59.64   MIN_Y= 16  MAX_Y=235  LMIN_Y= 16  LMAX_Y=235
    AVE_U=117.64  MIN_U= 56  MAX_U=193  LMIN_U= 83  LMAX_U=145
    AVE_V=141.43  MIN_V= 97  MAX_V=214  LMIN_V=125  LMAX_V=182

[StainlessS]

DGIndex Template Script to produce ShowChannels data as in previous post (Is slow, as plays entire clip to end).

Writes "Accumulated.txt" file on last frame (appended to any already existing file).

# Requires GScript, Grunt, RT_Stats, ShowChannels, DGIndex
#Import ("D:\avs\BANK\QueryBorderCrop.avsi")        # Required by RoboLevels unless in plugs dir
#Import ("D:\avs\BANK\QueryLumaMinMAx.Avsi")

VIDOEOFILE="__vid__"   # DGIndex inserts clip name here
MPEG2Source(VIDOEOFILE)


NAME=VIDOEOFILE
# RoboLevels() # Uncomment if Global (clipwise) Auto Levels required first
ShowChannels(SetVar=true,show=false) # set Show=true, if required but may be a tiny bit slower
AssumeFPS(250.0) # Do it a bit quicker

EOL=Chr(10)
S="""NAME + EOL + \
  "    AVE_Y="+String(SC_AAve_0,"%3.2f")+"  MIN_Y="+String(SC_AMIN_0,"%3.0f")+"  MAX_Y="+String(SC_AMAX_0,"%3.0f")+ \
  "  LMIN_Y="+String(SC_ALMN_0,"%3.0f")+"  LMAX_Y="+String(SC_ALMX_0,"%3.0f") + EOL + \
  "    AVE_U="+String(SC_AAve_1,"%3.2f")+"  MIN_U="+String(SC_AMIN_1,"%3.0f")+"  MAX_U="+String(SC_AMAX_1,"%3.0f")+ \
  "  LMIN_U="+String(SC_ALMN_1,"%3.0f")+"  LMAX_U="+String(SC_ALMX_1,"%3.0f") + EOL + \
  "    AVE_V="+String(SC_AAve_2,"%3.2f")+"  MIN_V="+String(SC_AMIN_2,"%3.0f")+"  MAX_V="+String(SC_AMAX_2,"%3.0f")+ \
  "  LMIN_V="+String(SC_ALMN_2,"%3.0f")+"  LMAX_V="+String(SC_ALMX_2,"%3.0f") + EOL"""
 WriteFileIf("Accumulated.txt","current_frame==FrameCount()-1",S,append=true)Return Last

return last

# Below optional

Function RoboLevels(clip c,float "Strength",int "Samples",float "Ignore",Bool "QBC",Float "QBC_Thresh",int "X",int "Y",int "W",int "H", \
	int "Matrix",bool "PC",bool "DEBUG") {
	c
	Frames=FrameCount
	Strength=Float(Default(Strength,1.0))
	Samples=(!Defined(Samples)) ? 24 : (Samples > Frames) ? Frames : (Samples < 1) ? 1 : Samples
	Ignore=Float(Default(Ignore,0.2))
	QBC=Default(QBC,True)
	QBC_Thresh=Float(Default(QBC_Thresh,-32.0))
	QBCropXP = Default(X,0)
	QBCropYP = Default(Y,0)
	QBCropWP = Default(W,0)
	QBCropHP = Default(H,0)
	Matrix = Default(Matrix,(width <= 720) ? 2 : 3)	
	PC=Default(PC,False)
	DEBUG=Default(DEBUG,True)
	Assert(Strength>0.0 && Strength <=1.0, "RoboLevels: 0.0 < Strength <= 1.0")
	GScript("""
		if(QBC) {
			QBCS=QueryBorderCrop(samples=Samples,thresh=QBC_Thresh,debug=DEBUG,ignore=Ignore,matrix=Matrix)
			(DEBUG)? RT_Debug(QBCS): NOP
			Eval(QBCS)
		}
		tclip=c.Crop(QBCropXP,QBCropYP,QBCropWP,QBCropHP)
		QLMMS=QueryLumaMinMax(tclip,samples=Samples,ignore=Ignore,debug=DEBUG,matrix=Matrix)
		(DEBUG)?RT_Debug(QLMMS):NOP
		Eval(QLMMS)
		if(IsRGB() || PC) {
			CSMin = 0
			CSMax = 255
		} else {		
			CSMin = 16
			CSMax = 235
		}
		ALMin = Int(CSMin - ((CSMin - QLMMMin) * Strength) + 0.5)	# Round Up
		ALMax = Int(CSMax - ((CSMax - QLMMMax) * Strength))       # Round down
		(QBC) ? Crop(QBCropXM,QBCropYM,QBCropWM,QBCropHM): NOP
		(DEBUG)? RT_Debug("Levels("+String(ALMin)+",1.0,"+String(AlMax)+","+String(CSMin)+","+String(CSMax)+",Coring=False)"):NOP
		Levels(ALMin,1.0,ALMax,CSMin,CSMax,Coring=False) # DO NOT use Coring 		
	""")
	return Last
}

EDITED As per Gavino post following.

EDIT: Was unsuccessful in trying to get it to WriteFile on close without using ScriptClip, anybody clever out there ?
EDIT: Clarify, WriteFileEnd wants to write the "S" string as it was on WriteFileEnd contructor call ie at the beginning,
we want to write final results, not what it was before starting.
EDIT:, OK, think I've twigged a way, new plugin to inquire value of string variable in destructor and then write it, other suggestions ?
EDIT: Perhaps WriteFileEnd should have the option to evaluate on writing ie at destructor rather than when constructed, would seem the
obvious way anyhow.

[Gavino]

Originally Posted by StainlessS

EDIT: Was unsuccessful in trying to get it to WriteFile on close without using ScriptClip, anybody clever out there ?
EDIT: Clarify, WriteFileEnd wants to write the "S" string as it was on WriteFileEnd contructor call ie at the beginning,
we want to write final results, not what it was before starting.
EDIT:, OK, think I've twigged a way, new plugin to inquire value of string variable in destructor and then write it, other suggestions ?
EDIT: Perhaps WriteFileEnd should have the option to evaluate on writing ie at destructor rather than when constructed, would seem the obvious way anyhow.

WriteFileEnd cannot evaluate the expression in the destructor as it needs the script environment ("env") to do this, and this is not available to the destructor. Even if the filter was changed to save a copy of env, it cannot be reliably used at the time the destructor is called.
See this post.

(EDIT) PS To show a final value in a run-time script, an alternative to your WriteFileIf(...,"current_frame==FrameCount()-1",...) is to use (still within ScriptClip)
WriteFile("Accumulated.txt","S",append=false)
See here for an explanation.
The advantage of this is it shows the value for the last frame rendered, which no longer needs to be the final frame of the clip.

EDIT2: (Following your custom of repeated edits. )
Your original way can be done without ScriptClip by setting S to be the expression to be evaluated rather than the value itself:

	EOL=Chr(10)
	S="""NAME + EOL + \
	"    AVE_Y="+String(SC_AAve_0,"%3.2f")+"  MIN_Y="+String(SC_AMIN_0,"%3.0f")+"  MAX_Y="+String(SC_AMAX_0,"%3.0f")+ \
	"  LMIN_Y="+String(SC_ALMN_0,"%3.0f")+"  LMAX_Y="+String(SC_ALMX_0,"%3.0f") + EOL + \
	"    AVE_U="+String(SC_AAve_1,"%3.2f")+"  MIN_U="+String(SC_AMIN_1,"%3.0f")+"  MAX_U="+String(SC_AMAX_1,"%3.0f")+ \
	"  LMIN_U="+String(SC_ALMN_1,"%3.0f")+"  LMAX_U="+String(SC_ALMX_1,"%3.0f") + EOL + \
	"    AVE_V="+String(SC_AAve_2,"%3.2f")+"  MIN_V="+String(SC_AMIN_2,"%3.0f")+"  MAX_V="+String(SC_AMAX_2,"%3.0f")+ \
	"  LMIN_V="+String(SC_ALMN_2,"%3.0f")+"  LMAX_V="+String(SC_ALMX_2,"%3.0f") + EOL"""
	WriteFileIf("Accumulated.txt","current_frame==FrameCount()-1",S,append=true)

[StainlessS]

Thank you for the edit, I think I tried similar but could not get it to work, perhaps problem with my double quotes or something,
Ill try again.

Have never seen either of your links, were both posted a couple of months before I joined D9.

Again, thanks.

PS,

Originally Posted by StainlessS

anybody clever out there ?

Modesty would have prevented me answering such a request, I see you suffer from no such impediment.

[Gavino]

Originally Posted by StainlessS

Modesty would have prevented me answering such a request, I see you suffer from no such impediment.

You didn't say that only someone clever should reply, so I felt free to do so ...

[StainlessS]

ShowChannels v0.5, new version, see 1st post.

[StainlessS]

@Jmac698,
I see you there on-line, thought that you may have missed the ShowChannels update to 0.5,
implemented x,y,w,h coords (any coords even for eg YV12) as requested.
Dont think that you saw it as only 1 download and think that was a moderator.

[StainlessS]

ShowChannels() v0.6 - 05 Dec 2012, Plugin for Avisynth 2.5+

Planar, YUY2 and RGB.

v0.5, 31 Oct 2012, Added x,y,w,h coords, not colorspace restricted (real pain in the bum to implement).
Can use odd coords for eg YV12, and even sample a single pixel.

v0.6, 05 Dec 2012. Added Interlaced arg for Planar only. Now gets correct chroma for planar interlaced , even down to single pixel.
(an even bigger pain in the bum to implement, modest speed improvement)

See 1st post.

EDIT: Other colorspaces dont require the interlaced arg. (You owe me big-time Jmac).

[StainlessS]

ShowChannels() v0.7 - 20 Apr 2013

Updated for Avisynth v2.60.
v2.58 & v2.60 dll's.

See 1st post.

[StainlessS]

Script to create log file containing info on each frame

Avisource("D:\avs\test.avi").Trim(0,9)

ShowChannels(SetVar=True,Accfile="SC_WholeClip.Log")

S="""String(current_frame)+"]" + \
    "YAve="+String(SC_Ave_0,"%6.2f")+"," + \
    "YMin="+String(SC_Min_0,"%3.f")+"," + \
    "YMax="+String(SC_Max_0,"%3.f")+"," + \
    "YLmn="+String(SC_LMn_0,"%3.f")+"," + \
    "YLmx="+String(SC_LMx_0,"%3.f")+"," + \
    "UAve="+String(SC_Ave_1,"%6.2f")+"," + \
    "UMin="+String(SC_Min_1,"%3.f")+"," + \
    "UMax="+String(SC_Max_1,"%3.f")+"," + \
    "ULmn="+String(SC_LMn_1,"%3.f")+"," + \
    "ULmx="+String(SC_LMx_1,"%3.f")+"," + \
    "VAve="+String(SC_Ave_2,"%6.2f")+"," + \
    "VMin="+String(SC_Min_2,"%3.f")+"," + \
    "VMax="+String(SC_Max_2,"%3.f")+"," + \
    "VLmn="+String(SC_LMn_2,"%3.f")+"," + \
    "VLmx="+String(SC_LMx_2,"%3.f")
"""

WriteFile("Frame.log", S, flush=true)

EDITED to remove ScriptClip().
Frame log, 1st 10 frames only

0]YAve= 75.13,YMin= 26,YMax=212,YLmn= 28,YLmx=197,UAve=119.51,UMin=100,UMax=132,ULmn=102,ULmx=132,VAve=140.11,VMin=127,VMax=198,VLmn=127,VLmx=188
1]YAve= 75.91,YMin= 26,YMax=212,YLmn= 28,YLmx=198,UAve=119.39,UMin=100,UMax=132,ULmn=102,ULmx=132,VAve=140.31,VMin=127,VMax=197,VLmn=127,VLmx=188
2]YAve= 77.11,YMin= 25,YMax=213,YLmn= 28,YLmx=201,UAve=119.24,UMin=100,UMax=132,ULmn=102,ULmx=132,VAve=140.51,VMin=127,VMax=197,VLmn=127,VLmx=188
3]YAve= 77.56,YMin= 24,YMax=212,YLmn= 28,YLmx=202,UAve=119.18,UMin=100,UMax=132,ULmn=102,ULmx=132,VAve=140.61,VMin=127,VMax=199,VLmn=127,VLmx=188
4]YAve= 77.85,YMin= 24,YMax=206,YLmn= 28,YLmx=200,UAve=119.11,UMin=101,UMax=132,ULmn=102,ULmx=132,VAve=140.66,VMin=127,VMax=199,VLmn=127,VLmx=188
5]YAve= 78.01,YMin= 24,YMax=208,YLmn= 28,YLmx=199,UAve=119.10,UMin=101,UMax=132,ULmn=102,ULmx=132,VAve=140.67,VMin=126,VMax=199,VLmn=127,VLmx=189
6]YAve= 77.79,YMin= 22,YMax=203,YLmn= 28,YLmx=198,UAve=119.13,UMin=101,UMax=132,ULmn=101,ULmx=132,VAve=140.55,VMin=127,VMax=197,VLmn=127,VLmx=189
7]YAve= 76.34,YMin= 21,YMax=200,YLmn= 28,YLmx=197,UAve=119.42,UMin=101,UMax=132,ULmn=101,ULmx=132,VAve=140.20,VMin=127,VMax=197,VLmn=127,VLmx=188
8]YAve= 74.68,YMin= 22,YMax=199,YLmn= 28,YLmx=195,UAve=119.75,UMin=101,UMax=132,ULmn=101,ULmx=132,VAve=139.80,VMin=127,VMax=198,VLmn=127,VLmx=188
9]YAve= 73.02,YMin= 22,YMax=200,YLmn= 28,YLmx=194,UAve=120.06,UMin=101,UMax=132,ULmn=101,ULmx=132,VAve=139.44,VMin=127,VMax=199,VLmn=127,VLmx=188

And log for accumulated info on whole clip.

SC_AAve_0=76.339836 SC_AMin_0=21 SC_AMax_0=213 SC_ALMn_0=28 SC_ALMx_0=202 
SC_AAve_1=119.388771 SC_AMin_1=100 SC_AMax_1=132 SC_ALMn_1=101 SC_ALMx_1=132 
SC_AAve_2=140.285110 SC_AMin_2=126 SC_AMax_2=199 SC_ALMn_2=127 SC_ALMx_2=189 
SC_Visited=10

[StainlessS]

ShowChannels v0.8, See 1st post.

v0.8, 30 Mar 2015, v2.6 dll compiled with Avisynth Version 6 Header.

[fvisagie]

Very useful, thanks .

Cheers,
François

[jmac698]

Hello,

Thanks for writing this plugin. I find it very useful.

Currently making use of this, this time for analyzing camera sensor noise in RAW frames. Basically want to answer the question, how many frames must I average for a given ISO to produce a noiseless picture, also to compute myself bias frames etc. (which are slight offsets as not every pixel is perfectly the same).

The addition of area parameters is really useful, because on the sensor a certain area is covered up by metal so that it's always completely dark, that is used for a calibration.

With the accumulated average, I can simply step through images, averaging them, until the MinMax reads 1 (or std dev reads some low value etc.). Read off the frame number, and that's the number of shots I need.

[StainlessS]

Showchannels() v0.09, new version see 1st post.

  v0.9, 15 Jan 2019, Moved to VS2008, Added version resource + x64.

[Kisa_AG]

Originally Posted by StainlessS

...Added version resource + x64.

Hello!

Great, thank you!

[Danette]

Originally Posted by StainlessS

Showchannels() v0.09, new version see 1st post.

  v0.9, 15 Jan 2019, Moved to VS2008, Added version resource + x64.

StainlessS: I want to make sure that I understand the use of the screen coordinates aspect of ShowChannels. Perhaps the best way is through an example.

If I have a 720 x 480 AR, and want to select the area that would exclude 5% (36 pixels) along each edge, essentially analyzing the center 648 x 408 area, would I phrase the x,y,w,h coordinates as follows:

ShowChannels(36, 36, 648, 408)