![\"\"](\"https://www.googleapis.com/download/storage/v1/b/kaggle-forum-message-attachments/o/inbox%2F2875376%2Ff4defb91cc32ce65fd1bc9720bb3e520%2FScreen%20Shot%202025-06-10%20at%205.57.55%20PM.png?generation=1749559363640132&alt=media\")
Hey, there!
\nI tried visualizing hand trajectories reconstructed from accelerometer data. These 3D plots break down the motion phases of each gesture into:
π¦ Hand at target location (still/resting)
\nπ§ Performs gesture
\nπ© Relaxes or moves hand to target
\nNote: You can find the dataset of all 8151 3D trajectory visualization images here : https://www.kaggle.com/datasets/ahsuna123/3d-trajectory-of-gestures-visualization
\nHereβs what each plot tells us β and why I think visual analysis should be your first step before any modeling begins.
\n
Plot 1: SEQ_000007 - Cheek - pinch skin - Seated
\nβΆ Motion Profile:
\nStarts with the hand relaxing into the target position (π©).
A large, continuous gesture is performed (π§) in an upward sweep.
\nEnds with a short \"hold\" phase (π¦) at a final location - indicating pinching the cheek.
\nThis user seems confident and fluid. The gesture occupies a long trajectory across all 3 axes, especially Z (upward).
\nπ Note:
\nThe plot indicates the trajectory of a single, decisive motion.
![\"\"](\"https://www.googleapis.com/download/storage/v1/b/kaggle-forum-message-attachments/o/inbox%2F2875376%2Fa72e1f67c5b6fe6edbdb2373c3bfe8e8%2FScreen%20Shot%202025-06-10%20at%205.58.35%20PM.png?generation=1749559375619425&alt=media\")
Plot 2: SEQ_000013 - Cheek - pinch skin - Lie on Side
\nβΆ Motion Profile:
\nGesture phase (π§) is much shorter and closer to the center.
Relaxation back to origin (π©) is smoother and slower than the gesture.
\nThe entire gesture seems to dip downward in Z-axis.
\nMore subtle.
\nContrast with Plot 1:
\nThis is shorter, compact, and lower-energy. User behavior looks very different though the gesture is same.
![\"\"](\"https://www.googleapis.com/download/storage/v1/b/kaggle-forum-message-attachments/o/inbox%2F2875376%2Fa2efb59ec84f870791736f2b3a0b0720%2FScreen%20Shot%202025-06-10%20at%205.59.06%20PM.png?generation=1749559394346619&alt=media\")
Plot 3: SEQ_000058 - Eyebrow - pull hair
\nβΆ Motion Profile:
\nGesture (π§) happens early and arcs upward.
The \"target position\" (π¦) follows the gesture β not preceding it like in others.
\nUser then relaxes or resets (π©) with a long hand movement.
\nThis sequence flips the usual βmove β gesture β restβ order.
\nCould be indicative of shifting posture.
![\"\"](\"https://www.googleapis.com/download/storage/v1/b/kaggle-forum-message-attachments/o/inbox%2F2875376%2F8af48d40db3485ce057c69f2b29ffa07%2FScreen%20Shot%202025-06-10%20at%205.59.52%20PM.png?generation=1749559406960905&alt=media\")
Plot 4: SEQ_000113 - Wave Hello
\nβΆ Motion Profile:
\nVery large gesture motion (π§) across X and Z.
Gesture happens after a long movement toward the target (π©).
\nHand finally rests (π¦).
\nThis gesture is vertical and energetic β with strong upward component.
\nContrast with Plot 3:
\nThe structure here is more linear and modular: move β gesture β rest. The user eturns to a final pose.
![\"\"](\"https://www.googleapis.com/download/storage/v1/b/kaggle-forum-message-attachments/o/inbox%2F2875376%2Fc55efa3aa55aa52552901057889844fd%2FScreen%20Shot%202025-06-10%20at%206.00.24%20PM.png?generation=1749559419400463&alt=media\")
Plot 5: SEQ_000237 - Forehead - pull hairline
\nβΆ Motion Profile:
\nInitial relaxation/movement (π©) is smooth and sideways.
Gesture (π§) is quick and dips in Z, possibly downward.
\nFinal position (π¦) is held firmly.
\nControlled and symmetric. The Z-axis slope is almost linear during the gesture.
", "messages": [ { "id": 3221133, "postDate": "2025-06-10T13:05:13.450Z", "content": "Hey, there!
\nI tried visualizing hand trajectories reconstructed from accelerometer data. These 3D plots break down the motion phases of each gesture into:
π¦ Hand at target location (still/resting)
\nπ§ Performs gesture
\nπ© Relaxes or moves hand to target
\nNote: You can find the dataset of all 8151 3D trajectory visualization images here : https://www.kaggle.com/datasets/ahsuna123/3d-trajectory-of-gestures-visualization
\nHereβs what each plot tells us β and why I think visual analysis should be your first step before any modeling begins.
\n
Plot 1: SEQ_000007 - Cheek - pinch skin - Seated
\nβΆ Motion Profile:
\nStarts with the hand relaxing into the target position (π©).
A large, continuous gesture is performed (π§) in an upward sweep.
\nEnds with a short \"hold\" phase (π¦) at a final location - indicating pinching the cheek.
\nThis user seems confident and fluid. The gesture occupies a long trajectory across all 3 axes, especially Z (upward).
\nπ Note:
\nThe plot indicates the trajectory of a single, decisive motion.
Plot 2: SEQ_000013 - Cheek - pinch skin - Lie on Side
\nβΆ Motion Profile:
\nGesture phase (π§) is much shorter and closer to the center.
Relaxation back to origin (π©) is smoother and slower than the gesture.
\nThe entire gesture seems to dip downward in Z-axis.
\nMore subtle.
\nContrast with Plot 1:
\nThis is shorter, compact, and lower-energy. User behavior looks very different though the gesture is same.
Plot 3: SEQ_000058 - Eyebrow - pull hair
\nβΆ Motion Profile:
\nGesture (π§) happens early and arcs upward.
The \"target position\" (π¦) follows the gesture β not preceding it like in others.
\nUser then relaxes or resets (π©) with a long hand movement.
\nThis sequence flips the usual βmove β gesture β restβ order.
\nCould be indicative of shifting posture.
Plot 4: SEQ_000113 - Wave Hello
\nβΆ Motion Profile:
\nVery large gesture motion (π§) across X and Z.
Gesture happens after a long movement toward the target (π©).
\nHand finally rests (π¦).
\nThis gesture is vertical and energetic β with strong upward component.
\nContrast with Plot 3:
\nThe structure here is more linear and modular: move β gesture β rest. The user eturns to a final pose.
Plot 5: SEQ_000237 - Forehead - pull hairline
\nβΆ Motion Profile:
\nInitial relaxation/movement (π©) is smooth and sideways.
Gesture (π§) is quick and dips in Z, possibly downward.
\nFinal position (π¦) is held firmly.
\nControlled and symmetric. The Z-axis slope is almost linear during the gesture.
", "rawMarkdown": "Hey, there! \nI tried visualizing hand trajectories reconstructed from accelerometer data. These 3D plots break down the motion phases of each gesture into:\n\nπ¦ Hand at target location (still/resting)\n\nπ§ Performs gesture\n\nπ© Relaxes or moves hand to target\n\nNote: You can find the dataset of all 8151 3D trajectory visualization images here : https://www.kaggle.com/datasets/ahsuna123/3d-trajectory-of-gestures-visualization\n\nHereβs what each plot tells us β and why I think visual analysis should be your first step before any modeling begins.\n\n\n\n\nPlot 1: SEQ_000007 - Cheek - pinch skin - Seated\nβΆ Motion Profile:\nStarts with the hand relaxing into the target position (π©).\n\nA large, continuous gesture is performed (π§) in an upward sweep.\n\nEnds with a short \"hold\" phase (π¦) at a final location - indicating pinching the cheek.\n\nThis user seems confident and fluid. The gesture occupies a long trajectory across all 3 axes, especially Z (upward).\n\nπ Note:\nThe plot indicates the trajectory of a single, decisive motion.\n\n\n\n\nPlot 2: SEQ_000013 - Cheek - pinch skin - Lie on Side\nβΆ Motion Profile:\nGesture phase (π§) is much shorter and closer to the center.\n\nRelaxation back to origin (π©) is smoother and slower than the gesture.\n\nThe entire gesture seems to dip downward in Z-axis.\n\nMore subtle.\n\nContrast with Plot 1:\nThis is shorter, compact, and lower-energy. User behavior looks very different though the gesture is same. \n\n\n\nPlot 3: SEQ_000058 - Eyebrow - pull hair\nβΆ Motion Profile:\nGesture (π§) happens early and arcs upward.\n\nThe \"target position\" (π¦) follows the gesture β not preceding it like in others.\n\nUser then relaxes or resets (π©) with a long hand movement.\n\nThis sequence flips the usual βmove β gesture β restβ order.\nCould be indicative of shifting posture.\n\n\n\nPlot 4: SEQ_000113 - Wave Hello\nβΆ Motion Profile:\nVery large gesture motion (π§) across X and Z.\n\nGesture happens after a long movement toward the target (π©).\n\nHand finally rests (π¦).\n\nThis gesture is vertical and energetic β with strong upward component.\n\nContrast with Plot 3:\nThe structure here is more linear and modular: move β gesture β rest. The user eturns to a final pose.\n\n\n\nPlot 5: SEQ_000237 - Forehead - pull hairline\nβΆ Motion Profile:\nInitial relaxation/movement (π©) is smooth and sideways.\n\nGesture (π§) is quick and dips in Z, possibly downward.\n\nFinal position (π¦) is held firmly.\n\nControlled and symmetric. The Z-axis slope is almost linear during the gesture.\n\n\n", "votes": 27 }, { "id": 3221405, "postDate": "2025-06-11T01:39:54.620Z", "content": "Plot 2 looks like a child's behavior.
", "rawMarkdown": "Plot 2 looks like a child's behavior.", "votes": 1, "replies": [ { "id": 3221514, "postDate": "2025-06-11T05:40:48.153Z", "content": "I checked and it is! For these sequences there are 3 children (plots 1, 2 & 3) and 2 adults (plots 4 & 5).
\nThat sequence is also from the shortest subject among these plots (157cm).
Hey, could you please help me with this, cuz when I am trying to reproduce these visualizations I think my plots are not matching with yours.(maybe viewpoint difference) For eg- for SEQ-000007
\n![\"\"](\"https://www.googleapis.com/download/storage/v1/b/kaggle-forum-message-attachments/o/inbox%2F22250876%2Fbd5a7e7fab0f13d69e8ae3e4e584bbc7%2Fimage_2025-06-17_213924184.png?generation=1750176565322211&alt=media\")
\nI would really be helpful if you could share the code which you have used.
Hello, I'm NENWA AGNES . I just Registered for the competition. I'm looking for a goup to join
", "rawMarkdown": "Hello, I'm NENWA AGNES . I just Registered for the competition. I'm looking for a goup to join" }, { "id": 3222099, "postDate": "2025-06-11T19:50:50.720Z", "content": "@ahsuna123 Are these related to acceleration coordinates of device sensor or you changed it into human define coordinate system.
", "rawMarkdown": "@ahsuna123 Are these related to acceleration coordinates of device sensor or you changed it into human define coordinate system.", "votes": 1, "isDeleted": true, "replies": [ { "id": 3222618, "postDate": "2025-06-12T09:56:39.673Z", "content": "Hey @asteyagaur
\nYes, these are derived from the acceleration coordinates.
Plot 2 looks like a child's behavior.
", "votes": 1, "replies": [ { "id": 3221514, "author_name": "Peter Moorhouse", "author_url": "", "post_date": "2025-06-11T05:40:48.153000", "content": "I checked and it is! For these sequences there are 3 children (plots 1, 2 & 3) and 2 adults (plots 4 & 5).
\nThat sequence is also from the shortest subject among these plots (157cm).
Hey, could you please help me with this, cuz when I am trying to reproduce these visualizations I think my plots are not matching with yours.(maybe viewpoint difference) For eg- for SEQ-000007
\n
\nI would really be helpful if you could share the code which you have used.
Hello, I'm NENWA AGNES . I just Registered for the competition. I'm looking for a goup to join
", "votes": 0, "replies": [] }, { "id": 3222099, "author_name": "", "author_url": "", "post_date": "2025-06-11T19:50:50.720000", "content": "@ahsuna123 Are these related to acceleration coordinates of device sensor or you changed it into human define coordinate system.
", "votes": 1, "replies": [ { "id": 3222618, "author_name": "AC", "author_url": "", "post_date": "2025-06-12T09:56:39.673000", "content": "Hey @asteyagaur
\nYes, these are derived from the acceleration coordinates.