Strange vertical line on the right

Maybe it is caused by my phone, but being not sure i post anyway.

I have tried to develop a picture in black and white with Flat Field Embedded in metadata, and even more than before (i have already had the impression but in this picture and with this processing is much easier to spot) i have noticed a strange sort of vertical line on the right part of the picture.

On wetransfer: the dng, the developed image, the processing profile, a screenshot. Everything under PD.

https://we.tl/t-scrKWHSQuh

here a thumb where it’s imho rather easy to see the problem.

thumb|417x310

Thank you in advance!

Trying to better understand things…

on the left with flat field vignetting correction and maxed out curves, on the right without.

Another image with a redmi note 8t does seem to show a line on the left.

Hi,
did you try using a flat-field file instead? Do you get the same problem?

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I have just tried with a flat field, and in this particular image it does seem to work fine (it’s a black and white).

The problem with flat field file and colors pictures is… another story i think…

Here the flat field: https://we.tl/t-GwVYd72BzU

that’s funny indeed… I have no idea what is going on though :-/

I have changed phone, a Poco M3, and still i get that line on the right plus some other reticular like patterns… something wrong in calculating math?

Hi,

certainly possible. Here’s the code:
https://bitbucket.org/agriggio/art/src/master/rtengine/gainmap.cc

The specs:
https://wwwimages2.adobe.com/content/dam/acom/en/products/photoshop/pdfs/dng_spec_1.5.0.0.pdf#G10.1053605

Let me know if you see anything that smells :+1:

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“A bit” difficult for me to understand the code, but i have found out that there is a line also an horizontal line on the lower part of the image. Shouldn’t the flat field be simmetric?

Counting the squares, the image is divided into 13 columns and 10 rows.

Looking at exif data with exiv2 i get this

Exif.Image.OpcodeList2 Undefined 2452 (Binary value suppressed)
Exif.Image.OpcodeList3 Undefined 4 0 0 0 0

With binary values, this…

Exif.Image.OpcodeList2                       Undefined 2452  0 0 0 4 0 0 0 9 1 3 0 0 0 0 0 1 0 0 2 84 0 0 0 0 0 0 0 1 0 0 12 47 0 0 16 111 0 0 0 0 0 0 0 1 0 0 0 2 0 0 0 2 0 0 0 10 0 0 0 13 63 185 153 153 153 153 153 154 63 179 177 59 19 177 59 20 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 64 144 62 189 64 119 190 102 64 80 136 10 64 47 187 42 64 29 153 105 64 19 224 99 64 16 105 66 64 16 249 133 64 27 11 20 64 43 59 188 64 66 17 171 64 101 145 50 64 136 214 27 64 133 41 76 64 88 89 11 64 50 104 38 64 23 119 125 64 5 178 150 63 242 118 50 63 232 149 185 63 239 216 160 64 1 105 50 64 17 126 5 64 38 69 53 64 68 230 138 64 114 135 49 64 106 70 44 64 62 255 34 64 28 140 136 64 5 100 246 63 224 5 197 63 198 194 178 63 188 43 79 63 194 173 232 63 215 142 244 63 250 255 253 64 20 208 14 64 45 183 132 64 88 166 156 64 88 21 172 64 48 38 201 64 16 23 201 63 234 255 174 63 194 120 90 63 167 221 132 63 157 146 194 63 163 25 251 63 184 231 174 63 220 91 201 64 4 227 243 64 33 4 124 64 67 200 95 64 82 200 117 64 40 78 245 64 9 73 178 63 220 63 40 63 178 128 53 63 154 172 214 63 146 239 88 63 150 255 56 63 169 185 134 63 205 202 51 63 253 122 127 64 26 69 233 64 60 147 184 64 86 31 214 64 41 36 162 64 9 138 200 63 221 169 85 63 178 243 216 63 155 31 165 63 147 148 142 63 152 40 162 63 171 204 191 63 206 250 176 64 0 243 57 64 28 105 193 64 64 228 69 64 98 189 188 64 52 133 128 64 18 119 71 63 237 116 67 63 197 1 167 63 170 229 95 63 161 217 192 63 168 211 66 63 190 23 116 63 228 154 202 64 8 234 217 64 39 235 105 64 75 148 239 64 119 21 180 64 68 117 116 64 32 216 161 64 10 73 18 63 233 148 9 63 207 51 232 63 196 191 248 63 205 1 44 63 226 169 24 64 3 146 104 64 26 66 183 64 55 46 36 64 98 198 193 64 140 131 214 64 94 109 248 64 59 210 198 64 30 56 110 64 12 90 144 64 1 23 186 63 249 56 30 63 254 252 30 64 10 249 15 64 26 3 230 64 48 241 160 64 82 137 198 64 129 185 53 64 149 8 69 64 137 51 4 64 95 43 241 64 59 188 69 64 41 78 223 64 31 23 224 64 26 226 197 64 30 115 254 64 40 98 83 64 57 152 9 64 85 219 151 64 131 119 28 64 147 215 173 0 0 0 9 1 3 0 0 0 0 0 1 0 0 2 84 0 0 0 0 0 0 0 0 0 0 12 47 0 0 16 111 0 0 0 0 0 0 0 1 0 0 0 2 0 0 0 2 0 0 0 10 0 0 0 13 63 185 153 153 153 153 153 154 63 179 177 59 19 177 59 20 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 64 130 101 110 64 102 120 132 64 63 125 49 64 35 169 132 64 21 163 134 64 12 85 146 64 11 200 206 64 9 122 39 64 18 140 191 64 31 205 23 64 53 28 23 64 84 71 213 64 122 200 168 64 118 24 37 64 73 232 226 64 36 1 7 64 15 88 141 63 252 231 185 63 233 157 133 63 226 178 165 63 230 89 92 63 245 133 176 64 8 226 94 64 26 230 124 64 54 55 186 64 93 28 21 64 93 32 246 64 48 252 65 64 18 170 144 63 251 18 112 63 215 207 192 63 192 91 202 63 183 67 30 63 188 64 129 63 206 36 204 63 236 149 222 64 9 232 11 64 35 157 216 64 72 208 214 64 77 100 239 64 36 211 74 64 7 160 123 63 224 159 14 63 186 37 116 63 164 40 18 63 154 248 6 63 159 95 225 63 178 133 155 63 210 251 7 63 252 61 129 64 21 209 135 64 51 188 23 64 70 7 134 64 29 148 73 64 2 95 183 63 213 38 243 63 174 189 175 63 152 28 73 63 145 27 45 63 148 42 125 63 166 8 223 63 198 51 109 63 241 244 226 64 18 92 187 64 43 58 97 64 66 98 166 64 32 29 82 64 3 22 92 63 212 227 168 63 175 81 225 63 152 108 144 63 146 25 233 63 149 163 117 63 167 83 40 63 200 153 64 63 243 90 184 64 18 118 117 64 52 162 2 64 84 57 59 64 40 14 208 64 8 240 167 63 228 175 50 63 190 39 99 63 168 169 94 63 159 181 30 63 166 71 131 63 184 219 56 63 217 217 22 64 3 76 176 64 28 215 179 64 56 170 114 64 102 123 114 64 52 166 206 64 22 209 32 64 2 63 144 63 223 106 91 63 201 199 156 63 192 115 84 63 199 92 201 63 219 171 248 63 250 145 135 64 16 112 147 64 44 70 183 64 83 19 39 64 130 114 128 64 80 233 21 64 45 152 71 64 21 238 209 64 6 1 113 63 249 10 205 63 242 159 167 63 246 78 153 64 4 70 207 64 16 121 237 64 37 237 134 64 67 215 149 64 111 1 248 64 138 142 175 64 112 233 80 64 78 156 77 64 46 86 51 64 30 73 247 64 21 228 207 64 19 198 136 64 20 240 145 64 27 112 121 64 44 207 235 64 66 160 184 64 112 201 104 64 135 22 93 0 0 0 9 1 3 0 0 0 0 0 1 0 0 2 84 0 0 0 1 0 0 0 1 0 0 12 47 0 0 16 111 0 0 0 0 0 0 0 1 0 0 0 2 0 0 0 2 0 0 0 10 0 0 0 13 63 185 153 153 153 153 153 154 63 179 177 59 19 177 59 20 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 64 130 212 172 64 102 37 207 64 66 87 53 64 35 114 158 64 20 68 79 64 12 166 242 64 7 84 40 64 10 28 144 64 17 79 94 64 31 167 32 64 52 78 50 64 84 38 154 64 122 178 41 64 119 203 93 64 74 243 28 64 36 134 5 64 13 35 38 63 253 229 212 63 232 15 22 63 221 126 248 63 227 106 118 63 244 239 120 64 6 176 206 64 27 57 63 64 55 20 50 64 95 55 146 64 89 11 191 64 52 204 119 64 19 5 164 63 251 212 9 63 215 86 236 63 190 176 30 63 181 68 203 63 187 17 112 63 207 0 114 63 237 29 103 64 11 17 56 64 35 252 38 64 71 221 37 64 73 155 62 64 39 86 228 64 10 111 91 63 226 253 79 63 188 129 3 63 163 216 194 63 154 0 56 63 158 239 244 63 179 36 5 63 212 131 250 63 255 229 141 64 24 28 166 64 55 223 211 64 69 200 184 64 32 244 81 64 4 208 212 63 214 169 43 63 175 8 75 63 152 174 60 63 144 250 217 63 148 94 193 63 167 56 163 63 200 106 131 63 243 180 171 64 19 81 243 64 51 90 170 64 77 233 36 64 32 69 74 64 4 196 219 63 216 96 163 63 176 111 163 63 153 216 72 63 145 244 158 63 150 127 160 63 168 171 36 63 202 232 88 63 249 66 26 64 23 33 143 64 50 237 136 64 87 47 82 64 42 162 200 64 12 79 23 63 230 181 212 63 192 65 220 63 168 51 214 63 159 235 48 63 166 55 16 63 185 250 230 63 222 238 64 64 4 84 133 64 29 235 25 64 65 166 118 64 101 225 168 64 57 70 245 64 25 57 31 64 1 189 244 63 224 8 83 63 200 23 34 63 191 240 171 63 198 28 14 63 218 219 20 63 249 212 40 64 18 166 204 64 45 73 216 64 81 255 59 64 130 161 236 64 83 72 244 64 45 63 245 64 20 84 222 64 5 5 187 63 247 90 228 63 239 176 64 63 243 233 203 64 2 177 162 64 18 93 108 64 38 38 117 64 69 137 226 64 114 47 149 64 138 217 122 64 114 32 235 64 75 211 243 64 43 251 175 64 29 83 9 64 20 80 248 64 16 244 236 64 19 141 24 64 29 231 126 64 42 172 136 64 70 8 60 64 113 59 179 64 135 187 106 0 0 0 9 1 3 0 0 0 0 0 1 0 0 2 84 0 0 0 1 0 0 0 0 0 0 12 47 0 0 16 111 0 0 0 0 0 0 0 1 0 0 0 2 0 0 0 2 0 0 0 10 0 0 0 13 63 185 153 153 153 153 153 154 63 179 177 59 19 177 59 20 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 64 116 123 155 64 87 5 166 64 53 184 160 64 27 67 233 64 13 152 94 64 5 87 48 64 2 42 156 64 2 77 94 64 9 163 81 64 23 19 236 64 41 240 186 64 71 132 127 64 103 0 120 64 104 7 226 64 59 181 61 64 24 239 14 64 6 114 250 63 239 242 175 63 220 85 93 63 213 139 103 63 216 255 52 63 231 69 181 64 0 60 163 64 17 152 142 64 41 54 85 64 78 188 62 64 76 242 91 64 39 73 179 64 11 177 210 63 240 84 205 63 208 121 206 63 186 50 92 63 178 6 128 63 181 213 229 63 199 95 188 63 226 93 3 64 2 157 174 64 24 188 16 64 59 68 231 64 60 192 33 64 26 218 104 64 2 60 244 63 218 74 119 63 184 219 9 63 163 190 87 63 155 14 184 63 159 51 115 63 176 148 168 63 202 163 115 63 241 58 126 64 12 188 146 64 40 88 51 64 56 3 31 64 21 138 146 63 251 107 244 63 208 212 70 63 174 32 191 63 154 56 110 63 148 200 197 63 150 195 34 63 165 239 21 63 194 92 102 63 231 173 158 64 9 95 226 64 34 243 92 64 59 59 108 64 21 209 249 63 251 21 234 63 207 189 209 63 175 109 200 63 154 225 131 63 149 127 253 63 152 229 133 63 167 103 229 63 197 34 83 63 234 21 187 64 11 58 115 64 39 111 56 64 69 190 135 64 29 100 206 64 3 24 1 63 221 81 117 63 188 21 64 63 167 242 150 63 160 213 32 63 166 104 88 63 183 37 90 63 212 216 207 63 250 35 82 64 19 164 212 64 47 237 189 64 85 108 126 64 43 34 175 64 14 63 137 63 248 68 18 63 216 179 22 63 196 11 19 63 188 233 215 63 194 89 199 63 212 12 217 63 239 158 55 64 9 128 187 64 33 7 170 64 68 217 212 64 116 246 52 64 66 87 41 64 32 210 218 64 13 6 245 63 253 170 183 63 237 163 202 63 231 67 225 63 235 17 237 63 251 71 88 64 9 128 16 64 28 149 91 64 55 128 246 64 95 15 230 64 130 60 197 64 102 133 47 64 65 190 114 64 36 202 147 64 22 242 199 64 15 41 26 64 12 198 205 64 14 138 71 64 21 232 152 64 36 14 6 64 58 216 61 64 101 135 42 64 124 245 171

can you reupload one of the raws?

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Here is a raw taken with the honor 6a: https://raw.pixls.us/getfile.php/1877/nice/HUAWEI%20-%20DLI-L22%20-%2016bit%20(4:3).dng

I’ve uploaded also a raw with the poco m3 but still it isn’t (i hope yet) online.

Here the vignetting files and an image with the poco, sorry for the fog… https://we.tl/t-65VokhvVZN

Meanwhile i have tried to create lensfun data for vignetting of the poco m3:
[Standard]
focal_length = 4.7
aperture = 1.8
distance = inf
a = 54859.7559590
k1 = -1.4200923
k2 = 1.1685198
k3 = -0.3934294

Putting in a good xml file is another story, exif data seems missing for focal, aperture, crop factor, name and so on…

Thanks! There was indeed an off-by-one error in the gain map interpolation, which was leading to wrong values being computed for the last rows/columns. It should be fixed now, so thanks again!

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Great, a big thank you!!! I’ll wait for next release!