Brightness, Contrast & the Histogram (FREQUENCY, with a Chart)
This lesson is part of the course
In this lesson
You brighten and stretch a dim 8×8 photo of a lamp with clipping to 0–255, compare the mean brightness, count the original pixels per brightness bin with FREQUENCY and draw the histogram.
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Lessons in this course
- Pixels as Numbers: RGB to Greyscale with Weighted Luminance Locked
- Brightness, Contrast & the Histogram (FREQUENCY, with a Chart) Locked
- Thresholding & Binary Masks: Separating an Object from the Background Locked
- 3×3 Convolution with SUMPRODUCT: a Gaussian Blur Locked
- Sharpening & Edge Detection: Sobel Gx, Gy and Gradient Magnitude Locked
- Padding & Stride: the Output-Size Formula and a Stride-2 Convolution Locked
- Max & Average Pooling: Shrinking Feature Maps Locked
- A Tiny CNN by Hand: Conv → ReLU → Pool → Score Locked