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wasm: pixelate demo adjustment

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esimov
2022-05-24 18:55:59 +03:00
parent 8640bcfa96
commit c4e7dc5ab6
1 changed files with 8 additions and 10 deletions
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18
pixelate/canvas.go
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@@ -217,9 +217,9 @@ func (c *Canvas) StartWebcam() (*Canvas, error) {
}
// pixelate pixelates the detected face region
func (c *Canvas) pixelate(data []uint8, size image.Rectangle, noiseLevel int) []uint8 {
func (c *Canvas) pixelate(data []uint8, rect image.Rectangle, noiseLevel int) []uint8 {
// Converts the array buffer to an image
img := pixels.PixToImage(data, size)
img := pixels.PixToImage(data, rect)
// Quantize the substracted image in order to reduce the number of colors.
// This will create a new pixelated subtype image.
@@ -245,7 +245,7 @@ func (c *Canvas) drawDetection(data []uint8, dets [][]int) {
c.ctx.Set("lineWidth", 2)
c.ctx.Set("strokeStyle", "rgba(255, 0, 0, 0.5)")
row, col, scale := det[1], det[0], det[2]
row, col, scale := det[1], det[0], int(float64(det[2])*1.1)
if c.showFrame {
c.ctx.Call("rect", row-scale/2, col-scale/2, scale, scale)
@@ -256,9 +256,8 @@ func (c *Canvas) drawDetection(data []uint8, dets [][]int) {
uint8Arr := js.Global().Get("Uint8Array").New(subimg)
js.CopyBytesToGo(imgData, uint8Arr)
// Draw the ellipse mask.
{
scx, scy := int(float64(scale)*0.8/1.5), int(float64(scale)*0.8/2.0)
{ // Draw the ellipse mask.
scx, scy := int(float64(scale)*0.8/1.5), int(float64(scale)*0.8/2.1)
rx, ry := scx/2, scy/2
if rx >= ry {
@@ -273,8 +272,8 @@ func (c *Canvas) drawDetection(data []uint8, dets [][]int) {
grad = c.ctxMask.Call("createRadialGradient", float64(scale/2)*invScaleX, scale/2, 0, float64(scale/2)*invScaleX, scale/2, scy)
}
grad.Call("addColorStop", 0.67, "rgba(0, 0, 0, 255)")
grad.Call("addColorStop", 0.82, "rgba(255, 255, 255, 0)")
grad.Call("addColorStop", 0.55, "rgba(0, 0, 0, 255)")
grad.Call("addColorStop", 0.7, "rgba(255, 255, 255, 0)")
// Clear the canvas on each frame.
c.ctxMask.Call("clearRect", 0, 0, c.windowSize.width, c.windowSize.height)
@@ -284,8 +283,7 @@ func (c *Canvas) drawDetection(data []uint8, dets [][]int) {
c.ctxMask.Call("fillRect", 0, 0, float64(scale)*invScaleX, float64(scale)*invScaleY)
}
// Draw the pixelated image into the ellipse gradient using composite operation.
{
{ // Draw the pixelated image into the ellipse gradient using composite operation.
rect := image.Rect(0, 0, scale, scale)
buffer := c.pixelate(imgData, rect, c.noiseLevel)