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simovni2:specs [2022/01/15 17:20] laurentc [Normalization] |
simovni2:specs [2022/10/20 22:42] (current) laurentc [Implementation] |
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| * Level of blurriness | * Level of blurriness | ||
| * **Position of the UAP** : 2 operating modes. | * **Position of the UAP** : 2 operating modes. | ||
| - | * **Direction relative to the witness** (*) (azimuth and angular height) | + | * Polar by **Direction relative to the witness** (*) (azimuth and angular height) |
| - | * Position | + | * Cartesian by position |
| * Shape & Surface state / Texture | * Shape & Surface state / Texture | ||
| * Evolution over time of all the estimates | * Evolution over time of all the estimates | ||
| Line 57: | Line 57: | ||
| * no problem | * no problem | ||
| * Size | Angular size : star like to 160° | * Size | Angular size : star like to 160° | ||
| - | * Star-Like : we are limited by the resolution. | + | * Star-Like : we are limited by the resolution. How star-like does a single lit pixel feels like ? Calibrations, |
| * Big things : We are limited to the field of view of the displays. Can be as low as 35° or as high as 90° | * Big things : We are limited to the field of view of the displays. Can be as low as 35° or as high as 90° | ||
| * Distance | * Distance | ||
| - | * We deal with UAPs at distance of more than 6 meters. Beyond that distance there is no issue of accommodation conflict provided the HMD projets the virtual image at infinity. | + | * We deal with UAPs at distance of more than 6 meters. Beyond that distance there is no issue of vergence-accommodation conflict provided the HMD projets the virtual image at infinity. |
| * Color | * Color | ||
| * The color gamut depends on the display technology. Ultra violet and deep red colors cannot be rendered well. But that is not a huge problem as far as the witness can tell the problem. | * The color gamut depends on the display technology. Ultra violet and deep red colors cannot be rendered well. But that is not a huge problem as far as the witness can tell the problem. | ||
| Line 68: | Line 68: | ||
| * The display system is not limiting. Here the difficulty is not the display system, but our ability to know what the witness saw. The limitation is the ability of the witness to describe what he saw. The human eye may be able to discriminate some additional characteristic of the light (polarization) but we won't go that far. | * The display system is not limiting. Here the difficulty is not the display system, but our ability to know what the witness saw. The limitation is the ability of the witness to describe what he saw. The human eye may be able to discriminate some additional characteristic of the light (polarization) but we won't go that far. | ||
| * Apparent Luminosity: From the brightness of a star/ | * Apparent Luminosity: From the brightness of a star/ | ||
| - | * That would be one of the most interesting parameters to measure accurately. FIXME. Question : how contrasted and luminous are these HMDs screens ? Luminosity of a pixel ? FIXME. | + | * That would be one of the most interesting parameters to measure accurately. Question : how contrasted and luminous are these HMDs screens ? Luminosity of a pixel ? How do they compare to a mag -1 star or the moon ? Because this parameter is not calibrated at all (not even by product) there is a need for a calibration file per product and we will have to do it. This is a unique need. It makes this project innovative. Calibrations, |
| * Level of blurriness | * Level of blurriness | ||
| * no problem | * no problem | ||
| Line 89: | Line 89: | ||
| The parameters should be tunable in real time by the investigator and/or the witness. | The parameters should be tunable in real time by the investigator and/or the witness. | ||
| + | |||
| + | Starts with a calibration phase if necessary to be sure the witness properly sees through the HMD. (eye/ | ||
| + | Set the brightness of the screen to a known and adapted level. | ||
| ==== Static Parameters ==== | ==== Static Parameters ==== | ||
| Line 102: | Line 105: | ||
| * In Mode 2 : billboard, always facing witness. No control. | * In Mode 2 : billboard, always facing witness. No control. | ||
| * Direction relative to the witness : **Altitude**, | * Direction relative to the witness : **Altitude**, | ||
| - | * Color ? How ? FIXME | + | * Color ? How ? FIXME |
| ==== investigator side parameters & controls ==== | ==== investigator side parameters & controls ==== | ||
| Line 122: | Line 124: | ||
| * Level of blurriness | * Level of blurriness | ||
| * **Distance**. Can be arbitrary if it is unknown. If arbitrary, distance should be set to a fixed value of more that 25m (for invisible stereo parallax), but not too far in order to remain closer than the back clipping plane of the rendering engine. (*) | * **Distance**. Can be arbitrary if it is unknown. If arbitrary, distance should be set to a fixed value of more that 25m (for invisible stereo parallax), but not too far in order to remain closer than the back clipping plane of the rendering engine. (*) | ||
| - | * Size : 2 operating modes. What's best ? Depends on the case. The origin of the 3D model should rather be defined close to its " | + | * Size : 2 operating modes. What's best ? Depends on the case. The origin of the 3D model should rather be defined close to its " |
| - | * **Size**. The size considered is the longest side of the bounding box < | + | * **Size**. The size considered is the width of the scaled cubic bounding box, it is directly in meters. What is used as a parameter to interpolate is that size in meters. (*) |
| - | * Angular Size. The __max angular | + | * Angular Size. is computed as angular_size = 2*atan(size/ |
| * **Apparent Luminosity** (*) | * **Apparent Luminosity** (*) | ||
| * 3D animation for the evolution of the Shape & Surface state / Texture animation time : anim_time | * 3D animation for the evolution of the Shape & Surface state / Texture animation time : anim_time | ||
| Line 146: | Line 148: | ||
| All parameters using " | All parameters using " | ||
| + | ====== Implementation ====== | ||
| + | [[simovni2: | ||
| + | ---- | ||
| + | |||
| + | {{: | ||
| + | OVNI(s) S02E01 production Canal+ 2022 | ||