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→Image size and ROI area
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Related commands ：fmtcap, pixelformat.
Related commands ：fmtcap, pixelformat.
−==== Image size and ROI area ====
+==== Image size and Max framerate ====
+Image size depends on the sensor. It varies from model to model.
+The maximum image frame rate depends on the sensor and the camera processing power, and the maximum frame rate varies for different image sizes.
+After setting the completed image size (ROI area), the camera will automatically calculate the maximum frame rate and provide it to the user for reference.
+The maximum frame rates for typical sizes are shown in the following table.
+{| class="wikitable"
+!model
+!size
+! max framerate
+!Note
+|-
+| rowspan="4" |MV-MIPI-IMX178M
+|3088(H) × 2064(V)
+|
+|Max size
+|-
+|5M
+|
+|
+|-
+|3M
+|
+|
+|-
+| 2M
+|
+|
+|}
+The actual frame rate can be less than the maximum frame rate and can be set to a decimal number.
+To guarantee the camera frame rate, we specify that the maximum exposure time cannot be greater than [1/fps] seconds.
+Related commands：maxwh，maxfps，fps。
+==== ROI area ====
+Only specific areas of the image can be transmitted by setting the camera's region of interest (ROI).
+The parameters of the output region include the horizontal offset (x), vertical offset (y), width (w), and height (h) of the output region.
+[x] ，[y]， [height] must be 4-aligned and [width] must be 8-aligned.
+By default, the ROI area of the camera is the full resolution area of the sensor.
+Related commands：roi.
===ISP===
===ISP===