Emphasizer API

Base URL: http://localhost:8000/api/v1/emphasizer

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Apply Transform

POST /apply
Content-Type: application/json

Applies an FT property transform to an uploaded image and returns four base64 panels representing the before/after views in both spatial and frequency domains.

Request body:

{
  "image_id":          "uuid",
  "action":            "shift",
  "domain":            "spatial",
  "shift_dy":          50,
  "shift_dx":          50,
  "u0":                0.1,
  "v0":                0.1,
  "stretch_sy":        1.5,
  "stretch_sx":        1.5,
  "mirror_axis":       "horizontal",
  "rotation_degrees":  45.0,
  "diff_axis":         "x",
  "integ_axis":        "x",
  "window_type":       "gaussian",
  "window_sigma":      0.3,
  "window_alpha":      0.54,
  "fourier_times":     0,
  "ft_component":      "magnitude",
  "brightness":        1.0,
  "contrast":          1.0
}

Field	Values	Description
action	shift · multiply_complex_exp · stretch · mirror · make_even · make_odd · rotate · differentiate · integrate · window	Transform to apply
domain	spatial · frequency	Apply action to image or to its FT
fourier_times	0 – 8	Extra FFT passes applied after the action
ft_component	magnitude · phase · real · imaginary	Component shown in frequency panels

Response 200 — spatial domain:

{
  "panel_tl_b64":  "<original spatial>",
  "panel_tr_b64":  "<original FT>",
  "panel_bl_b64":  "<transformed spatial>",
  "panel_br_b64":  "<FT of transformed>",
  "panel_tl_label": "Original — Spatial",
  "panel_tr_label": "Original — FT magnitude",
  "panel_bl_label": "Transformed — shift",
  "panel_br_label": "FT of Transformed — magnitude",
  "domain": "spatial",
  "action": "shift"
}

Response 200 — frequency domain:

The panel layout swaps: top-left becomes the original FT, top-right becomes the original spatial reconstruction, etc.

Errors: 404 image not found · 500 transform failed