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Megapixel Formula:
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The megapixel conversion calculator converts physical dimensions in centimeters to megapixels based on the resolution (cm per pixel). This is useful for determining the required resolution for digital images of physical objects.
The calculator uses the megapixel formula:
Where:
Explanation: The formula first converts the physical dimensions to pixels by dividing by the resolution, then calculates total pixels, and finally converts to megapixels (1 megapixel = 1,000,000 pixels).
Details: Accurate megapixel calculation helps in determining the required camera resolution for digitizing physical objects, scanning documents, or creating digital representations of physical items with specific quality requirements.
Tips: Enter width and height in centimeters, and the resolution in centimeters per pixel. All values must be positive numbers. The resolution should be the smallest detail you want to capture (e.g., 0.01 cm/px means each pixel represents 0.01 cm).
Q1: How do I determine the appropriate resolution?
A: The resolution depends on the smallest detail you need to capture. For example, to capture details of 0.1 cm, you'd use 0.1 cm/px resolution.
Q2: What's a typical resolution for document scanning?
A: For standard documents, 0.0085 cm/px (300 dpi) is common. For archival quality, 0.0042 cm/px (600 dpi) might be used.
Q3: How does this relate to DPI?
A: DPI (dots per inch) can be converted to cm/px by dividing 2.54 cm/inch by the DPI value (e.g., 300 DPI = 2.54/300 = ~0.0085 cm/px).
Q4: What megapixel camera do I need for a specific scanning job?
A: Use this calculator to determine the required megapixels based on your physical dimensions and desired resolution.
Q5: Does this account for color depth?
A: No, this calculates spatial resolution only. Color depth (bits per pixel) affects file size but not the megapixel count.